/*-------------------------------------------------------------------------
 *
 * pg_dump.c
 *	  pg_dump is an utility for dumping out a postgres database
 * into a script file.
 *
 *	pg_dump will read the system catalogs in a database and
 *	dump out a script that reproduces
 *	the schema of the database in terms of
 *		  user-defined types
 *		  user-defined functions
 *		  tables
 *		  indices
 *		  aggregates
 *		  operators
 *		  ACL - grant/revoke
 *
 * the output script is SQL that is understood by PostgreSQL
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *	  $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.120 1999/09/23 19:11:09 momjian Exp $
 *
 * Modifications - 6/10/96 - dave@bensoft.com - version 1.13.dhb
 *
 *	 Applied 'insert string' patch from "Marc G. Fournier" <scrappy@ki.net>
 *	 Added '-t table' option
 *	 Added '-a' option
 *	 Added '-da' option
 *
 * Modifications - 6/12/96 - dave@bensoft.com - version 1.13.dhb.2
 *
 *	 - Fixed dumpTable output to output lengths for char and varchar types!
 *	 - Added single. quote to twin single quote expansion for 'insert' string
 *	   mode.
 *
 * Modifications - 7/26/96 - asussman@vidya.com
 *
 *	 - Fixed ouput lengths for char and varchar type where the length is variable (-1)
 *
 * Modifications - 6/1/97 - igor@sba.miami.edu
 * - Added functions to free allocated memory used for retrieving
 *	 indices,tables,inheritance,types,functions and aggregates.
 *	 No more leaks reported by Purify.
 *
 *
 * Modifications - 1/26/98 - pjlobo@euitt.upm.es
 *		 - Added support for password authentication
 *-------------------------------------------------------------------------
 */

#include <unistd.h>				/* for getopt() */
#include <ctype.h>
#include <sys/param.h>			/* for MAXHOSTNAMELEN on most */
#ifdef solaris_sparc
#include <netdb.h>				/* for MAXHOSTNAMELEN on some */
#endif

#include "postgres.h"
#include "access/htup.h"
#include "catalog/pg_type.h"
#include "catalog/pg_language.h"
#include "catalog/pg_index.h"
#include "catalog/pg_trigger.h"
#include "access/attnum.h"

#include "libpq-fe.h"
#ifndef HAVE_STRDUP
#include "strdup.h"
#endif

#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif

#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif

#include "pg_dump.h"

static void dumpSequence(FILE *fout, TableInfo tbinfo);
static void dumpACL(FILE *fout, TableInfo tbinfo);
static void dumpTriggers(FILE *fout, const char *tablename,
			 TableInfo *tblinfo, int numTables);
static void dumpRules(FILE *fout, const char *tablename,
		  TableInfo *tblinfo, int numTables);
static char *checkForQuote(const char *s);
static void clearTableInfo(TableInfo *, int);
static void dumpOneFunc(FILE *fout, FuncInfo *finfo, int i,
			TypeInfo *tinfo, int numTypes);
static int	findLastBuiltinOid(void);
static bool isViewRule(char *relname);
static void setMaxOid(FILE *fout);

static void AddAcl(char *aclbuf, const char *keyword);
static char *GetPrivileges(const char *s);
static void becomeUser(FILE *fout, const char *username);

extern char *optarg;
extern int	optind,
			opterr;

/* global decls */
bool		g_verbose;			/* User wants verbose narration of our
								 * activities. */
int			g_last_builtin_oid; /* value of the last builtin oid */
FILE	   *g_fout;				/* the script file */
PGconn	   *g_conn;				/* the database connection */

bool		force_quotes;		/* User wants to suppress double-quotes */
bool		dumpData;			/* dump data using proper insert strings */
bool		attrNames;			/* put attr names into insert strings */
bool		schemaOnly;
bool		dataOnly;
bool		aclsSkip;
bool		dropSchema;

char		g_opaque_type[10];	/* name for the opaque type */

/* placeholders for the delimiters for comments */
char		g_comment_start[10];
char		g_comment_end[10];


static void
usage(const char *progname)
{
	fprintf(stderr,
			"usage:  %s [options] dbname\n", progname);
	fprintf(stderr,
			"\t -a          \t\t dump out only the data, no schema\n");
	fprintf(stderr,
			"\t -c          \t\t clean(drop) schema prior to create\n");
	fprintf(stderr,
			"\t -d          \t\t dump data as proper insert strings\n");
	fprintf(stderr,
			"\t -D          \t\t dump data as inserts"
			" with attribute names\n");
	fprintf(stderr,
			"\t -f filename \t\t script output filename\n");
	fprintf(stderr,
			"\t -h hostname \t\t server host name\n");
	fprintf(stderr,
		"\t -n          \t\t suppress most quotes around identifiers\n");
	fprintf(stderr,
		  "\t -N          \t\t enable most quotes around identifiers\n");
	fprintf(stderr,
			"\t -o          \t\t dump object id's (oids)\n");
	fprintf(stderr,
			"\t -p port     \t\t server port number\n");
	fprintf(stderr,
			"\t -s          \t\t dump out only the schema, no data\n");
	fprintf(stderr,
			"\t -t table    \t\t dump for this table only\n");
	fprintf(stderr,
			"\t -u          \t\t use password authentication\n");
	fprintf(stderr,
			"\t -v          \t\t verbose\n");
	fprintf(stderr,
			"\t -x          \t\t do not dump ACL's (grant/revoke)\n");
	fprintf(stderr,
			"\nIf dbname is not supplied, then the DATABASE environment "
			"variable value is used.\n");
	fprintf(stderr, "\n");

	exit(1);
}

static void
exit_nicely(PGconn *conn)
{
	PQfinish(conn);
	exit(1);
}


/*
 * isViewRule
 *				Determine if the relation is a VIEW
 *
 */
static bool
isViewRule(char *relname)
{
	PGresult   *res;
	int			ntups;
	char		query[MAX_QUERY_SIZE];

	sprintf(query, "select relname from pg_class, pg_rewrite "
			"where pg_class.oid = ev_class "
			"and pg_rewrite.ev_type = '1' "
			"and rulename = '_RET%s'", relname);

	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "isViewRule(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	ntups = PQntuples(res);

	PQclear(res);
	return ntups > 0 ? TRUE : FALSE;
}

#define COPYBUFSIZ		8192


static void
dumpClasses_nodumpData(FILE *fout, const char *classname, const bool oids)
{

	PGresult   *res;
	char		query[255];
	int			ret;
	bool		copydone;
	char		copybuf[COPYBUFSIZ];

	if (oids == true)
	{
		fprintf(fout, "COPY %s WITH OIDS FROM stdin;\n",
				fmtId(classname, force_quotes));
		sprintf(query, "COPY %s WITH OIDS TO stdout;\n",
				fmtId(classname, force_quotes));
	}
	else
	{
		fprintf(fout, "COPY %s FROM stdin;\n", fmtId(classname, force_quotes));
		sprintf(query, "COPY %s TO stdout;\n", fmtId(classname, force_quotes));
	}
	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) == PGRES_FATAL_ERROR)
	{
		fprintf(stderr, "SQL query to dump the contents of Table '%s' "
				"did not execute.  Explanation from backend: '%s'.\n"
				"The query was: '%s'.\n",
				classname, PQerrorMessage(g_conn), query);
		exit_nicely(g_conn);
	}
	else
	{
		if (PQresultStatus(res) != PGRES_COPY_OUT)
		{
			fprintf(stderr, "SQL query to dump the contents of Table '%s' "
					"executed abnormally.\n"
					"PQexec() returned status %d when %d was expected.\n"
					"The query was: '%s'.\n",
				  classname, PQresultStatus(res), PGRES_COPY_OUT, query);
			exit_nicely(g_conn);
		}
		else
		{
			copydone = false;
			while (!copydone)
			{
				ret = PQgetline(g_conn, copybuf, COPYBUFSIZ);

				if (copybuf[0] == '\\' &&
					copybuf[1] == '.' &&
					copybuf[2] == '\0')
				{
					copydone = true;	/* don't print this... */
				}
				else
				{
					fputs(copybuf, fout);
					switch (ret)
					{
						case EOF:
							copydone = true;
							/* FALLTHROUGH */
						case 0:
							fputc('\n', fout);
							break;
						case 1:
							break;
					}
				}
			}
			fprintf(fout, "\\.\n");
		}
		ret = PQendcopy(g_conn);
		if (ret != 0)
		{
			fprintf(stderr, "SQL query to dump the contents of Table '%s' "
					"did not execute correctly.  After we read all the "
				 "table contents from the backend, PQendcopy() failed.  "
					"Explanation from backend: '%s'.\n"
					"The query was: '%s'.\n",
					classname, PQerrorMessage(g_conn), query);
			PQclear(res);
			exit_nicely(g_conn);
		}
	}
}



static void
dumpClasses_dumpData(FILE *fout, const char *classname,
					 const TableInfo tblinfo, bool oids)
{
	PGresult   *res;
	char		q[MAX_QUERY_SIZE];
	int			tuple;
	int			field;
	char	   *expsrc;

	sprintf(q, "SELECT * FROM %s", fmtId(classname, force_quotes));
	res = PQexec(g_conn, q);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "dumpClasses(): command failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}
	for (tuple = 0; tuple < PQntuples(res); tuple++)
	{
		fprintf(fout, "INSERT INTO %s ", fmtId(classname, force_quotes));
		if (attrNames == true)
		{
			sprintf(q, "(");
			for (field = 0; field < PQnfields(res); field++)
			{
				if (field > 0)
					strcat(q, ",");
				strcat(q, fmtId(PQfname(res, field), force_quotes));
			}
			strcat(q, ") ");
			fprintf(fout, "%s", q);
		}
		fprintf(fout, "VALUES (");
		for (field = 0; field < PQnfields(res); field++)
		{
			if (field > 0)
				fprintf(fout, ",");
			if (PQgetisnull(res, tuple, field))
			{
				fprintf(fout, "NULL");
				continue;
			}
			switch (PQftype(res, field))
			{
				case INT2OID:
				case INT4OID:
				case OIDOID:		/* int types */
				case FLOAT4OID:
				case FLOAT8OID:		/* float types */
					/* These types are printed without quotes */
					fprintf(fout, "%s",
							PQgetvalue(res, tuple, field));
					break;
				default:
					/*
					 * All other types are printed as string literals,
					 * with appropriate escaping of special
					 * characters. Quote mark ' goes to '' per SQL
					 * standard, other stuff goes to \ sequences.
					 */
					putc('\'', fout);
					expsrc = PQgetvalue(res, tuple, field);
					while (*expsrc)
					{
						char		ch = *expsrc++;

						if (ch == '\\' || ch == '\'')
						{
							putc(ch, fout);			/* double these */
							putc(ch, fout);
						}
						else if (ch < '\040')
						{
							/* generate octal escape for control chars */
							putc('\\', fout);
							putc(((ch >> 6) & 3) + '0', fout);
							putc(((ch >> 3) & 7) + '0', fout);
							putc((ch & 7) + '0', fout);
						}
						else
							putc(ch, fout);
					}
					putc('\'', fout);
					break;
			}
		}
		fprintf(fout, ");\n");
	}
	PQclear(res);
}



/*
 * DumpClasses -
 *	  dump the contents of all the classes.
 */
static void
dumpClasses(const TableInfo *tblinfo, const int numTables, FILE *fout,
			const char *onlytable, const bool oids)
{

	int			i;
	char	   *all_only;

	if (onlytable == NULL)
		all_only = "all";
	else
		all_only = "only";

	if (g_verbose)
		fprintf(stderr, "%s dumping out the contents of %s %d table%s/sequence%s %s\n",
				g_comment_start, all_only,
				(onlytable == NULL) ? numTables : 1,
				(onlytable == NULL) ? "s" : "", (onlytable == NULL) ? "s" : "",
				g_comment_end);

	/* Dump SEQUENCEs first (if dataOnly) */
	if (dataOnly)
	{
		for (i = 0; i < numTables; i++)
		{
			if (!(tblinfo[i].sequence))
				continue;
			if (!onlytable || (!strcmp(tblinfo[i].relname, onlytable)))
			{
				if (g_verbose)
					fprintf(stderr, "%s dumping out schema of sequence '%s' %s\n",
					 g_comment_start, tblinfo[i].relname, g_comment_end);
				becomeUser(fout, tblinfo[i].usename);
				dumpSequence(fout, tblinfo[i]);
			}
		}
	}

	for (i = 0; i < numTables; i++)
	{
		const char *classname = tblinfo[i].relname;

		/* Skip VIEW relations */
		if (isViewRule(tblinfo[i].relname))
			continue;

		if (tblinfo[i].sequence)/* already dumped */
			continue;

		if (!onlytable || (!strcmp(classname, onlytable)))
		{
			if (g_verbose)
				fprintf(stderr, "%s dumping out the contents of Table '%s' %s\n",
						g_comment_start, classname, g_comment_end);

			becomeUser(fout, tblinfo[i].usename);

			if (!dumpData)
				dumpClasses_nodumpData(fout, classname, oids);
			else
				dumpClasses_dumpData(fout, classname, tblinfo[i], oids);
		}
	}
}


static void
prompt_for_password(char *username, char *password)
{
	char		buf[512];
	int			length;

#ifdef HAVE_TERMIOS_H
	struct termios t_orig,
				t;

#endif

	printf("Username: ");
	fgets(username, 100, stdin);
	length = strlen(username);
	/* skip rest of the line */
	if (length > 0 && username[length - 1] != '\n')
	{
		do
		{
			fgets(buf, 512, stdin);
		} while (buf[strlen(buf) - 1] != '\n');
	}
	if (length > 0 && username[length - 1] == '\n')
		username[length - 1] = '\0';

	printf("Password: ");
#ifdef HAVE_TERMIOS_H
	tcgetattr(0, &t);
	t_orig = t;
	t.c_lflag &= ~ECHO;
	tcsetattr(0, TCSADRAIN, &t);
#endif
	fgets(password, 100, stdin);
#ifdef HAVE_TERMIOS_H
	tcsetattr(0, TCSADRAIN, &t_orig);
#endif

	length = strlen(password);
	/* skip rest of the line */
	if (length > 0 && password[length - 1] != '\n')
	{
		do
		{
			fgets(buf, 512, stdin);
		} while (buf[strlen(buf) - 1] != '\n');
	}
	if (length > 0 && password[length - 1] == '\n')
		password[length - 1] = '\0';

	printf("\n\n");
}


int
main(int argc, char **argv)
{
	int			c;
	const char *progname;
	const char *filename = NULL;
	const char *dbname = NULL;
	const char *pghost = NULL;
	const char *pgport = NULL;
	char	   *tablename = NULL;
	bool		oids = false;
	TableInfo  *tblinfo;
	int			numTables;
	char		connect_string[512] = "";
	char		tmp_string[128];
	char		username[100];
	char		password[100];
	bool		use_password = false;

	g_verbose = false;
	force_quotes = true;
	dropSchema = false;

	strcpy(g_comment_start, "-- ");
	g_comment_end[0] = '\0';
	strcpy(g_opaque_type, "opaque");

	dataOnly = schemaOnly = dumpData = attrNames = false;

	progname = *argv;

	while ((c = getopt(argc, argv, "acdDf:h:nNop:st:uvxz")) != EOF)
	{
		switch (c)
		{
			case 'a':			/* Dump data only */
				dataOnly = true;
				break;
			case 'c':			/* clean (i.e., drop) schema prior to
								 * create */
				dropSchema = true;
				break;
			case 'd':			/* dump data as proper insert strings */
				dumpData = true;
				break;
			case 'D':			/* dump data as proper insert strings with
								 * attr names */
				dumpData = true;
				attrNames = true;
				break;
			case 'f':			/* output file name */
				filename = optarg;
				break;
			case 'h':			/* server host */
				pghost = optarg;
				break;
			case 'n':			/* Do not force double-quotes on
								 * identifiers */
				force_quotes = false;
				break;
			case 'N':			/* Force double-quotes on identifiers */
				force_quotes = true;
				break;
			case 'o':			/* Dump oids */
				oids = true;
				break;
			case 'p':			/* server port */
				pgport = optarg;
				break;
			case 's':			/* dump schema only */
				schemaOnly = true;
				break;
			case 't':			/* Dump data for this table only */
				{
					int			i;

					tablename = strdup(optarg);

					/*
					 * quoted string? Then strip quotes and preserve
					 * case...
					 */
					if (tablename[0] == '"')
					{
						strcpy(tablename, &tablename[1]);
						if (*(tablename + strlen(tablename) - 1) == '"')
							*(tablename + strlen(tablename) - 1) = '\0';
					}
					/* otherwise, convert table name to lowercase... */
					else
					{
						for (i = 0; tablename[i]; i++)
							if (isascii((unsigned char) tablename[i]) &&
								isupper(tablename[i]))
								tablename[i] = tolower(tablename[i]);
					}
				}
				break;
			case 'u':
				use_password = true;
				break;
			case 'v':			/* verbose */
				g_verbose = true;
				break;
			case 'x':			/* skip ACL dump */
				aclsSkip = true;
				break;
			case 'z':			/* Old ACL option bjm 1999/05/27 */
				fprintf(stderr,
				 "%s: The -z option(dump ACLs) is now the default, continuing.\n",
					progname);
				break;
			default:
				usage(progname);
				break;
		}
	}

	if (dumpData == true && oids == true)
	{
		fprintf(stderr,
			 "%s: INSERT's can not set oids, so INSERT and OID options can not be used together.\n",
				progname);
		exit(2);
	}
		
	/* open the output file */
	if (filename == NULL)
		g_fout = stdout;
	else
	{
#ifndef __CYGWIN32__
		g_fout = fopen(filename, "w");
#else
		g_fout = fopen(filename, "wb");
#endif
		if (g_fout == NULL)
		{
			fprintf(stderr,
				 "%s: could not open output file named %s for writing\n",
					progname, filename);
			exit(2);
		}
	}

	/* find database */
	if (!(dbname = argv[optind]) &&
		!(dbname = getenv("DATABASE")))
	{
		fprintf(stderr, "%s: no database name specified\n", progname);
		exit(2);
	}

	/* g_conn = PQsetdb(pghost, pgport, NULL, NULL, dbname); */
	if (pghost != NULL)
	{
		sprintf(tmp_string, "host=%s ", pghost);
		strcat(connect_string, tmp_string);
	}
	if (pgport != NULL)
	{
		sprintf(tmp_string, "port=%s ", pgport);
		strcat(connect_string, tmp_string);
	}
	if (dbname != NULL)
	{
		sprintf(tmp_string, "dbname=%s ", dbname);
		strcat(connect_string, tmp_string);
	}
	if (use_password)
	{
		prompt_for_password(username, password);
		strcat(connect_string, "authtype=password ");
		sprintf(tmp_string, "user=%s ", username);
		strcat(connect_string, tmp_string);
		sprintf(tmp_string, "password=%s ", password);
		strcat(connect_string, tmp_string);
		MemSet(tmp_string, 0, sizeof(tmp_string));
		MemSet(password, 0, sizeof(password));
	}
	g_conn = PQconnectdb(connect_string);
	MemSet(connect_string, 0, sizeof(connect_string));
	/* check to see that the backend connection was successfully made */
	if (PQstatus(g_conn) == CONNECTION_BAD)
	{
		fprintf(stderr, "Connection to database '%s' failed.\n", dbname);
		fprintf(stderr, "%s\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	/*
	 * Start serializable transaction to dump consistent data
	 */
	{
		PGresult   *res;

		res = PQexec(g_conn, "begin");
		if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
		{
			fprintf(stderr, "BEGIN command failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
			exit_nicely(g_conn);
		}
		PQclear(res);
		res = PQexec(g_conn, "set transaction isolation level serializable");
		if (!res || PQresultStatus(res) != PGRES_COMMAND_OK)
		{
			fprintf(stderr, "SET TRANSACTION command failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
			exit_nicely(g_conn);
		}
		PQclear(res);
	}

	g_last_builtin_oid = findLastBuiltinOid();

	if (oids == true)
		setMaxOid(g_fout);
	if (!dataOnly)
	{
		if (g_verbose)
			fprintf(stderr, "%s last builtin oid is %u %s\n",
					g_comment_start, g_last_builtin_oid, g_comment_end);
		tblinfo = dumpSchema(g_fout, &numTables, tablename, aclsSkip);
	}
	else
		tblinfo = dumpSchema(NULL, &numTables, tablename, aclsSkip);

	if (!schemaOnly)
		dumpClasses(tblinfo, numTables, g_fout, tablename, oids);

	if (!dataOnly)				/* dump indexes and triggers at the end
								 * for performance */
	{
		dumpSchemaIdx(g_fout, tablename, tblinfo, numTables);
		dumpTriggers(g_fout, tablename, tblinfo, numTables);
		dumpRules(g_fout, tablename, tblinfo, numTables);
	}

	fflush(g_fout);
	if (g_fout != stdout)
		fclose(g_fout);

	clearTableInfo(tblinfo, numTables);
	PQfinish(g_conn);
	exit(0);
}

/*
 * getTypes:
 *	  read all base types in the system catalogs and return them in the
 * TypeInfo* structure
 *
 *	numTypes is set to the number of types read in
 *
 */
TypeInfo   *
getTypes(int *numTypes)
{
	PGresult   *res;
	int			ntups;
	int			i;
	char		query[MAX_QUERY_SIZE];
	TypeInfo   *tinfo;

	int			i_oid;
	int			i_typowner;
	int			i_typname;
	int			i_typlen;
	int			i_typprtlen;
	int			i_typinput;
	int			i_typoutput;
	int			i_typreceive;
	int			i_typsend;
	int			i_typelem;
	int			i_typdelim;
	int			i_typdefault;
	int			i_typrelid;
	int			i_typbyval;
	int			i_usename;

	/* find all base types */

	/*
	 * we include even the built-in types because those may be used as
	 * array elements by user-defined types
	 */

	/*
	 * we filter out the built-in types when we dump out the types
	 */

	sprintf(query, "SELECT pg_type.oid, typowner,typname, typlen, typprtlen, "
		  "typinput, typoutput, typreceive, typsend, typelem, typdelim, "
		  "typdefault, typrelid,typbyval, usename from pg_type, pg_user "
			"where typowner = usesysid");

	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "getTypes(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	ntups = PQntuples(res);

	tinfo = (TypeInfo *) malloc(ntups * sizeof(TypeInfo));

	i_oid = PQfnumber(res, "oid");
	i_typowner = PQfnumber(res, "typowner");
	i_typname = PQfnumber(res, "typname");
	i_typlen = PQfnumber(res, "typlen");
	i_typprtlen = PQfnumber(res, "typprtlen");
	i_typinput = PQfnumber(res, "typinput");
	i_typoutput = PQfnumber(res, "typoutput");
	i_typreceive = PQfnumber(res, "typreceive");
	i_typsend = PQfnumber(res, "typsend");
	i_typelem = PQfnumber(res, "typelem");
	i_typdelim = PQfnumber(res, "typdelim");
	i_typdefault = PQfnumber(res, "typdefault");
	i_typrelid = PQfnumber(res, "typrelid");
	i_typbyval = PQfnumber(res, "typbyval");
	i_usename = PQfnumber(res, "usename");

	for (i = 0; i < ntups; i++)
	{
		tinfo[i].oid = strdup(PQgetvalue(res, i, i_oid));
		tinfo[i].typowner = strdup(PQgetvalue(res, i, i_typowner));
		tinfo[i].typname = strdup(PQgetvalue(res, i, i_typname));
		tinfo[i].typlen = strdup(PQgetvalue(res, i, i_typlen));
		tinfo[i].typprtlen = strdup(PQgetvalue(res, i, i_typprtlen));
		tinfo[i].typinput = strdup(PQgetvalue(res, i, i_typinput));
		tinfo[i].typoutput = strdup(PQgetvalue(res, i, i_typoutput));
		tinfo[i].typreceive = strdup(PQgetvalue(res, i, i_typreceive));
		tinfo[i].typsend = strdup(PQgetvalue(res, i, i_typsend));
		tinfo[i].typelem = strdup(PQgetvalue(res, i, i_typelem));
		tinfo[i].typdelim = strdup(PQgetvalue(res, i, i_typdelim));
		tinfo[i].typdefault = strdup(PQgetvalue(res, i, i_typdefault));
		tinfo[i].typrelid = strdup(PQgetvalue(res, i, i_typrelid));
		tinfo[i].usename = strdup(PQgetvalue(res, i, i_usename));

		if (strcmp(PQgetvalue(res, i, i_typbyval), "f") == 0)
			tinfo[i].passedbyvalue = 0;
		else
			tinfo[i].passedbyvalue = 1;

		/*
		 * check for user-defined array types, omit system generated ones
		 */
		if ((strcmp(tinfo[i].typelem, "0") != 0) &&
			tinfo[i].typname[0] != '_')
			tinfo[i].isArray = 1;
		else
			tinfo[i].isArray = 0;
	}

	*numTypes = ntups;

	PQclear(res);

	return tinfo;
}

/*
 * getOperators:
 *	  read all operators in the system catalogs and return them in the
 * OprInfo* structure
 *
 *	numOprs is set to the number of operators read in
 *
 *
 */
OprInfo    *
getOperators(int *numOprs)
{
	PGresult   *res;
	int			ntups;
	int			i;
	char		query[MAX_QUERY_SIZE];

	OprInfo    *oprinfo;

	int			i_oid;
	int			i_oprname;
	int			i_oprkind;
	int			i_oprcode;
	int			i_oprleft;
	int			i_oprright;
	int			i_oprcom;
	int			i_oprnegate;
	int			i_oprrest;
	int			i_oprjoin;
	int			i_oprcanhash;
	int			i_oprlsortop;
	int			i_oprrsortop;
	int			i_usename;

	/*
	 * find all operators, including builtin operators, filter out
	 * system-defined operators at dump-out time
	 */

	sprintf(query, "SELECT pg_operator.oid, oprname, oprkind, oprcode, "
			"oprleft, oprright, oprcom, oprnegate, oprrest, oprjoin, "
			"oprcanhash, oprlsortop, oprrsortop, usename "
			"from pg_operator, pg_user "
			"where oprowner = usesysid");

	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "getOperators(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	ntups = PQntuples(res);
	*numOprs = ntups;

	oprinfo = (OprInfo *) malloc(ntups * sizeof(OprInfo));

	i_oid = PQfnumber(res, "oid");
	i_oprname = PQfnumber(res, "oprname");
	i_oprkind = PQfnumber(res, "oprkind");
	i_oprcode = PQfnumber(res, "oprcode");
	i_oprleft = PQfnumber(res, "oprleft");
	i_oprright = PQfnumber(res, "oprright");
	i_oprcom = PQfnumber(res, "oprcom");
	i_oprnegate = PQfnumber(res, "oprnegate");
	i_oprrest = PQfnumber(res, "oprrest");
	i_oprjoin = PQfnumber(res, "oprjoin");
	i_oprcanhash = PQfnumber(res, "oprcanhash");
	i_oprlsortop = PQfnumber(res, "oprlsortop");
	i_oprrsortop = PQfnumber(res, "oprrsortop");
	i_usename = PQfnumber(res, "usename");

	for (i = 0; i < ntups; i++)
	{
		oprinfo[i].oid = strdup(PQgetvalue(res, i, i_oid));
		oprinfo[i].oprname = strdup(PQgetvalue(res, i, i_oprname));
		oprinfo[i].oprkind = strdup(PQgetvalue(res, i, i_oprkind));
		oprinfo[i].oprcode = strdup(PQgetvalue(res, i, i_oprcode));
		oprinfo[i].oprleft = strdup(PQgetvalue(res, i, i_oprleft));
		oprinfo[i].oprright = strdup(PQgetvalue(res, i, i_oprright));
		oprinfo[i].oprcom = strdup(PQgetvalue(res, i, i_oprcom));
		oprinfo[i].oprnegate = strdup(PQgetvalue(res, i, i_oprnegate));
		oprinfo[i].oprrest = strdup(PQgetvalue(res, i, i_oprrest));
		oprinfo[i].oprjoin = strdup(PQgetvalue(res, i, i_oprjoin));
		oprinfo[i].oprcanhash = strdup(PQgetvalue(res, i, i_oprcanhash));
		oprinfo[i].oprlsortop = strdup(PQgetvalue(res, i, i_oprlsortop));
		oprinfo[i].oprrsortop = strdup(PQgetvalue(res, i, i_oprrsortop));
		oprinfo[i].usename = strdup(PQgetvalue(res, i, i_usename));
	}

	PQclear(res);

	return oprinfo;
}

void
clearTypeInfo(TypeInfo *tp, int numTypes)
{
	int			i;

	for (i = 0; i < numTypes; ++i)
	{
		if (tp[i].oid)
			free(tp[i].oid);
		if (tp[i].typowner)
			free(tp[i].typowner);
		if (tp[i].typname)
			free(tp[i].typname);
		if (tp[i].typlen)
			free(tp[i].typlen);
		if (tp[i].typprtlen)
			free(tp[i].typprtlen);
		if (tp[i].typinput)
			free(tp[i].typinput);
		if (tp[i].typoutput)
			free(tp[i].typoutput);
		if (tp[i].typreceive)
			free(tp[i].typreceive);
		if (tp[i].typsend)
			free(tp[i].typsend);
		if (tp[i].typelem)
			free(tp[i].typelem);
		if (tp[i].typdelim)
			free(tp[i].typdelim);
		if (tp[i].typdefault)
			free(tp[i].typdefault);
		if (tp[i].typrelid)
			free(tp[i].typrelid);
		if (tp[i].usename)
			free(tp[i].usename);
	}
	free(tp);
}

void
clearFuncInfo(FuncInfo *fun, int numFuncs)
{
	int			i,
				a;

	if (!fun)
		return;
	for (i = 0; i < numFuncs; ++i)
	{
		if (fun[i].oid)
			free(fun[i].oid);
		if (fun[i].proname)
			free(fun[i].proname);
		if (fun[i].usename)
			free(fun[i].usename);
		for (a = 0; a < 8; ++a)
			if (fun[i].argtypes[a])
				free(fun[i].argtypes[a]);
		if (fun[i].prorettype)
			free(fun[i].prorettype);
		if (fun[i].prosrc)
			free(fun[i].prosrc);
		if (fun[i].probin)
			free(fun[i].probin);
	}
	free(fun);
}

static void
clearTableInfo(TableInfo *tblinfo, int numTables)
{
	int			i,
				j;

	for (i = 0; i < numTables; ++i)
	{

		if (tblinfo[i].oid)
			free(tblinfo[i].oid);
		if (tblinfo[i].relacl)
			free(tblinfo[i].relacl);
		if (tblinfo[i].usename)
			free(tblinfo[i].usename);

		if (tblinfo[i].relname)
			free(tblinfo[i].relname);

		if (tblinfo[i].sequence)
			continue;

		/* Process Attributes */
		for (j = 0; j < tblinfo[i].numatts; j++)
		{
			if (tblinfo[i].attnames[j])
				free(tblinfo[i].attnames[j]);
			if (tblinfo[i].typnames[j])
				free(tblinfo[i].typnames[j]);
		}
		if (tblinfo[i].atttypmod)
			free((int *) tblinfo[i].atttypmod);
		if (tblinfo[i].inhAttrs)
			free((int *) tblinfo[i].inhAttrs);
		if (tblinfo[i].attnames)
			free(tblinfo[i].attnames);
		if (tblinfo[i].typnames)
			free(tblinfo[i].typnames);
		if (tblinfo[i].notnull)
			free(tblinfo[i].notnull);

	}
	free(tblinfo);
}

void
clearInhInfo(InhInfo *inh, int numInherits)
{
	int			i;

	if (!inh)
		return;
	for (i = 0; i < numInherits; ++i)
	{
		if (inh[i].inhrel)
			free(inh[i].inhrel);
		if (inh[i].inhparent)
			free(inh[i].inhparent);
	}
	free(inh);
}

void
clearOprInfo(OprInfo *opr, int numOprs)
{
	int			i;

	if (!opr)
		return;
	for (i = 0; i < numOprs; ++i)
	{
		if (opr[i].oid)
			free(opr[i].oid);
		if (opr[i].oprname)
			free(opr[i].oprname);
		if (opr[i].oprkind)
			free(opr[i].oprkind);
		if (opr[i].oprcode)
			free(opr[i].oprcode);
		if (opr[i].oprleft)
			free(opr[i].oprleft);
		if (opr[i].oprright)
			free(opr[i].oprright);
		if (opr[i].oprcom)
			free(opr[i].oprcom);
		if (opr[i].oprnegate)
			free(opr[i].oprnegate);
		if (opr[i].oprrest)
			free(opr[i].oprrest);
		if (opr[i].oprjoin)
			free(opr[i].oprjoin);
		if (opr[i].oprcanhash)
			free(opr[i].oprcanhash);
		if (opr[i].oprlsortop)
			free(opr[i].oprlsortop);
		if (opr[i].oprrsortop)
			free(opr[i].oprrsortop);
		if (opr[i].usename)
			free(opr[i].usename);
	}
	free(opr);
}

void
clearIndInfo(IndInfo *ind, int numIndices)
{
	int			i,
				a;

	if (!ind)
		return;
	for (i = 0; i < numIndices; ++i)
	{
		if (ind[i].indexrelname)
			free(ind[i].indexrelname);
		if (ind[i].indrelname)
			free(ind[i].indrelname);
		if (ind[i].indamname)
			free(ind[i].indamname);
		if (ind[i].indproc)
			free(ind[i].indproc);
		if (ind[i].indisunique)
			free(ind[i].indisunique);
		for (a = 0; a < INDEX_MAX_KEYS; ++a)
		{
			if (ind[i].indkey[a])
				free(ind[i].indkey[a]);
			if (ind[i].indclass[a])
				free(ind[i].indclass[a]);
		}
	}
	free(ind);
}

void
clearAggInfo(AggInfo *agginfo, int numArgs)
{
	int			i;

	if (!agginfo)
		return;
	for (i = 0; i < numArgs; ++i)
	{
		if (agginfo[i].oid)
			free(agginfo[i].oid);
		if (agginfo[i].aggname)
			free(agginfo[i].aggname);
		if (agginfo[i].aggtransfn1)
			free(agginfo[i].aggtransfn1);
		if (agginfo[i].aggtransfn2)
			free(agginfo[i].aggtransfn2);
		if (agginfo[i].aggfinalfn)
			free(agginfo[i].aggfinalfn);
		if (agginfo[i].aggtranstype1)
			free(agginfo[i].aggtranstype1);
		if (agginfo[i].aggbasetype)
			free(agginfo[i].aggbasetype);
		if (agginfo[i].aggtranstype2)
			free(agginfo[i].aggtranstype2);
		if (agginfo[i].agginitval1)
			free(agginfo[i].agginitval1);
		if (agginfo[i].agginitval2)
			free(agginfo[i].agginitval2);
		if (agginfo[i].usename)
			free(agginfo[i].usename);
	}
	free(agginfo);
}

/*
 * getAggregates:
 *	  read all the user-defined aggregates in the system catalogs and
 * return them in the AggInfo* structure
 *
 * numAggs is set to the number of aggregates read in
 *
 *
 */
AggInfo    *
getAggregates(int *numAggs)
{
	PGresult   *res;
	int			ntups;
	int			i;
	char		query[MAX_QUERY_SIZE];
	AggInfo    *agginfo;

	int			i_oid;
	int			i_aggname;
	int			i_aggtransfn1;
	int			i_aggtransfn2;
	int			i_aggfinalfn;
	int			i_aggtranstype1;
	int			i_aggbasetype;
	int			i_aggtranstype2;
	int			i_agginitval1;
	int			i_agginitval2;
	int			i_usename;

	/* find all user-defined aggregates */

	sprintf(query,
			"SELECT pg_aggregate.oid, aggname, aggtransfn1, aggtransfn2, "
			"aggfinalfn, aggtranstype1, aggbasetype, aggtranstype2, "
		  "agginitval1, agginitval2, usename from pg_aggregate, pg_user "
			"where aggowner = usesysid");

	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "getAggregates(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	ntups = PQntuples(res);
	*numAggs = ntups;

	agginfo = (AggInfo *) malloc(ntups * sizeof(AggInfo));

	i_oid = PQfnumber(res, "oid");
	i_aggname = PQfnumber(res, "aggname");
	i_aggtransfn1 = PQfnumber(res, "aggtransfn1");
	i_aggtransfn2 = PQfnumber(res, "aggtransfn2");
	i_aggfinalfn = PQfnumber(res, "aggfinalfn");
	i_aggtranstype1 = PQfnumber(res, "aggtranstype1");
	i_aggbasetype = PQfnumber(res, "aggbasetype");
	i_aggtranstype2 = PQfnumber(res, "aggtranstype2");
	i_agginitval1 = PQfnumber(res, "agginitval1");
	i_agginitval2 = PQfnumber(res, "agginitval2");
	i_usename = PQfnumber(res, "usename");

	for (i = 0; i < ntups; i++)
	{
		agginfo[i].oid = strdup(PQgetvalue(res, i, i_oid));
		agginfo[i].aggname = strdup(PQgetvalue(res, i, i_aggname));
		agginfo[i].aggtransfn1 = strdup(PQgetvalue(res, i, i_aggtransfn1));
		agginfo[i].aggtransfn2 = strdup(PQgetvalue(res, i, i_aggtransfn2));
		agginfo[i].aggfinalfn = strdup(PQgetvalue(res, i, i_aggfinalfn));
		agginfo[i].aggtranstype1 = strdup(PQgetvalue(res, i, i_aggtranstype1));
		agginfo[i].aggbasetype = strdup(PQgetvalue(res, i, i_aggbasetype));
		agginfo[i].aggtranstype2 = strdup(PQgetvalue(res, i, i_aggtranstype2));
		agginfo[i].agginitval1 = strdup(PQgetvalue(res, i, i_agginitval1));
		agginfo[i].agginitval2 = strdup(PQgetvalue(res, i, i_agginitval2));
		agginfo[i].usename = strdup(PQgetvalue(res, i, i_usename));
	}

	PQclear(res);

	return agginfo;
}

/*
 * getFuncs:
 *	  read all the user-defined functions in the system catalogs and
 * return them in the FuncInfo* structure
 *
 * numFuncs is set to the number of functions read in
 *
 *
 */
FuncInfo   *
getFuncs(int *numFuncs)
{
	PGresult   *res;
	int			ntups;
	int			i;
	char		query[MAX_QUERY_SIZE];
	FuncInfo   *finfo;

	int			i_oid;
	int			i_proname;
	int			i_prolang;
	int			i_pronargs;
	int			i_proargtypes;
	int			i_prorettype;
	int			i_proretset;
	int			i_prosrc;
	int			i_probin;
	int			i_usename;

	/* find all user-defined funcs */

	sprintf(query,
			"SELECT pg_proc.oid, proname, prolang, pronargs, prorettype, "
			"proretset, proargtypes, prosrc, probin, usename "
			"from pg_proc, pg_user "
			"where pg_proc.oid > '%u'::oid and proowner = usesysid",
			g_last_builtin_oid);

	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "getFuncs(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	ntups = PQntuples(res);

	*numFuncs = ntups;

	finfo = (FuncInfo *) malloc(ntups * sizeof(FuncInfo));

	i_oid = PQfnumber(res, "oid");
	i_proname = PQfnumber(res, "proname");
	i_prolang = PQfnumber(res, "prolang");
	i_pronargs = PQfnumber(res, "pronargs");
	i_proargtypes = PQfnumber(res, "proargtypes");
	i_prorettype = PQfnumber(res, "prorettype");
	i_proretset = PQfnumber(res, "proretset");
	i_prosrc = PQfnumber(res, "prosrc");
	i_probin = PQfnumber(res, "probin");
	i_usename = PQfnumber(res, "usename");

	for (i = 0; i < ntups; i++)
	{
		finfo[i].oid = strdup(PQgetvalue(res, i, i_oid));
		finfo[i].proname = strdup(PQgetvalue(res, i, i_proname));

		finfo[i].prosrc = checkForQuote(PQgetvalue(res, i, i_prosrc));
		finfo[i].probin = strdup(PQgetvalue(res, i, i_probin));

		finfo[i].prorettype = strdup(PQgetvalue(res, i, i_prorettype));
		finfo[i].retset = (strcmp(PQgetvalue(res, i, i_proretset), "t") == 0);
		finfo[i].nargs = atoi(PQgetvalue(res, i, i_pronargs));
		finfo[i].lang = atoi(PQgetvalue(res, i, i_prolang));

		finfo[i].usename = strdup(PQgetvalue(res, i, i_usename));

		parseArgTypes(finfo[i].argtypes, PQgetvalue(res, i, i_proargtypes));

		finfo[i].dumped = 0;
	}

	PQclear(res);

	return finfo;

}

/*
 * getTables
 *	  read all the user-defined tables (no indices, no catalogs)
 * in the system catalogs return them in the TableInfo* structure
 *
 * numTables is set to the number of tables read in
 *
 *
 */
TableInfo  *
getTables(int *numTables, FuncInfo *finfo, int numFuncs)
{
	PGresult   *res;
	int			ntups;
	int			i;
	char		query[MAX_QUERY_SIZE];
	TableInfo  *tblinfo;

	int			i_oid;
	int			i_relname;
	int			i_relkind;
	int			i_relacl;
	int			i_usename;
	int			i_relchecks;
	int			i_reltriggers;

	/*
	 * find all the user-defined tables (no indices and no catalogs),
	 * ordering by oid is important so that we always process the parent
	 * tables before the child tables when traversing the tblinfo*
	 *
	 * we ignore tables that are not type 'r' (ordinary relation)
	 * or 'S' (sequence) --- in particular, Large Object relations
	 * (type 'l') are ignored.
	 */

	sprintf(query,
			"SELECT pg_class.oid, relname, relkind, relacl, usename, "
			"relchecks, reltriggers "
			"from pg_class, pg_user "
			"where relowner = usesysid and "
			"(relkind = 'r' or relkind = 'S') and relname !~ '^pg_' "
			"order by oid");

	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "getTables(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	ntups = PQntuples(res);

	*numTables = ntups;

	tblinfo = (TableInfo *) malloc(ntups * sizeof(TableInfo));

	i_oid = PQfnumber(res, "oid");
	i_relname = PQfnumber(res, "relname");
	i_relkind = PQfnumber(res, "relkind");
	i_relacl = PQfnumber(res, "relacl");
	i_usename = PQfnumber(res, "usename");
	i_relchecks = PQfnumber(res, "relchecks");
	i_reltriggers = PQfnumber(res, "reltriggers");

	for (i = 0; i < ntups; i++)
	{
		tblinfo[i].oid = strdup(PQgetvalue(res, i, i_oid));
		tblinfo[i].relname = strdup(PQgetvalue(res, i, i_relname));
		tblinfo[i].relacl = strdup(PQgetvalue(res, i, i_relacl));
		tblinfo[i].sequence = (strcmp(PQgetvalue(res, i, i_relkind), "S") == 0);
		tblinfo[i].usename = strdup(PQgetvalue(res, i, i_usename));
		tblinfo[i].ncheck = atoi(PQgetvalue(res, i, i_relchecks));
		tblinfo[i].ntrig = atoi(PQgetvalue(res, i, i_reltriggers));

		/*
		 * Exclude inherited CHECKs from CHECK constraints total. If a
		 * constraint matches by name and condition with a constraint
		 * belonging to a parent class, we assume it was inherited.
		 */
		if (tblinfo[i].ncheck > 0)
		{
			PGresult   *res2;
			int			ntups2;

			if (g_verbose)
				fprintf(stderr, "%s excluding inherited CHECK constraints "
						"for relation: '%s' %s\n",
						g_comment_start,
						tblinfo[i].relname,
						g_comment_end);

			sprintf(query, "SELECT rcname from pg_relcheck, pg_inherits as i "
					"where rcrelid = '%s'::oid "
					" and rcrelid = i.inhrel"
					" and exists "
					"  (select * from pg_relcheck as c "
					"    where c.rcname = pg_relcheck.rcname "
					"      and c.rcsrc = pg_relcheck.rcsrc "
					"      and c.rcrelid = i.inhparent) ",
					tblinfo[i].oid);
			res2 = PQexec(g_conn, query);
			if (!res2 ||
				PQresultStatus(res2) != PGRES_TUPLES_OK)
			{
				fprintf(stderr, "getTables(): SELECT (for inherited CHECK) failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
				exit_nicely(g_conn);
			}
			ntups2 = PQntuples(res2);
			tblinfo[i].ncheck -= ntups2;
			if (tblinfo[i].ncheck < 0)
			{
				fprintf(stderr, "getTables(): found more inherited CHECKs than total for "
						"relation %s\n",
						tblinfo[i].relname);
				exit_nicely(g_conn);
			}
			PQclear(res2);
		}

		/* Get non-inherited CHECK constraints, if any */
		if (tblinfo[i].ncheck > 0)
		{
			PGresult   *res2;
			int			i_rcname,
						i_rcsrc;
			int			ntups2;
			int			i2;

			if (g_verbose)
				fprintf(stderr, "%s finding CHECK constraints for relation: '%s' %s\n",
						g_comment_start,
						tblinfo[i].relname,
						g_comment_end);

			sprintf(query, "SELECT rcname, rcsrc from pg_relcheck "
					"where rcrelid = '%s'::oid "
					"   and not exists "
					"  (select * from pg_relcheck as c, pg_inherits as i "
					"   where i.inhrel = pg_relcheck.rcrelid "
					"     and c.rcname = pg_relcheck.rcname "
					"     and c.rcsrc = pg_relcheck.rcsrc "
					"     and c.rcrelid = i.inhparent) ",
					tblinfo[i].oid);
			res2 = PQexec(g_conn, query);
			if (!res2 ||
				PQresultStatus(res2) != PGRES_TUPLES_OK)
			{
				fprintf(stderr, "getTables(): SELECT (for CHECK) failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
				exit_nicely(g_conn);
			}
			ntups2 = PQntuples(res2);
			if (ntups2 != tblinfo[i].ncheck)
			{
				fprintf(stderr, "getTables(): relation '%s': %d CHECKs were expected, but got %d\n",
						tblinfo[i].relname, tblinfo[i].ncheck, ntups2);
				exit_nicely(g_conn);
			}
			i_rcname = PQfnumber(res2, "rcname");
			i_rcsrc = PQfnumber(res2, "rcsrc");
			tblinfo[i].check_expr = (char **) malloc(ntups2 * sizeof(char *));
			for (i2 = 0; i2 < ntups2; i2++)
			{
				char	   *name = PQgetvalue(res2, i2, i_rcname);
				char	   *expr = PQgetvalue(res2, i2, i_rcsrc);

				query[0] = '\0';
				if (name[0] != '$')
					sprintf(query, "CONSTRAINT %s ", fmtId(name, force_quotes));
				sprintf(query + strlen(query), "CHECK (%s)", expr);
				tblinfo[i].check_expr[i2] = strdup(query);
			}
			PQclear(res2);
		}
		else
			tblinfo[i].check_expr = NULL;

		/* Get Triggers */
		if (tblinfo[i].ntrig > 0)
		{
			PGresult   *res2;
			int			i_tgname,
						i_tgfoid,
						i_tgtype,
						i_tgnargs,
						i_tgargs;
			int			ntups2;
			int			i2;

			if (g_verbose)
				fprintf(stderr, "%s finding Triggers for relation: '%s' %s\n",
						g_comment_start,
						tblinfo[i].relname,
						g_comment_end);

			sprintf(query, "SELECT tgname, tgfoid, tgtype, tgnargs, tgargs "
					"from pg_trigger "
					"where tgrelid = '%s'::oid ",
					tblinfo[i].oid);
			res2 = PQexec(g_conn, query);
			if (!res2 ||
				PQresultStatus(res2) != PGRES_TUPLES_OK)
			{
				fprintf(stderr, "getTables(): SELECT (for TRIGGER) failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
				exit_nicely(g_conn);
			}
			ntups2 = PQntuples(res2);
			if (ntups2 != tblinfo[i].ntrig)
			{
				fprintf(stderr, "getTables(): relation '%s': %d Triggers were expected, but got %d\n",
						tblinfo[i].relname, tblinfo[i].ntrig, ntups2);
				exit_nicely(g_conn);
			}
			i_tgname = PQfnumber(res2, "tgname");
			i_tgfoid = PQfnumber(res2, "tgfoid");
			i_tgtype = PQfnumber(res2, "tgtype");
			i_tgnargs = PQfnumber(res2, "tgnargs");
			i_tgargs = PQfnumber(res2, "tgargs");
			tblinfo[i].triggers = (char **) malloc(ntups2 * sizeof(char *));
			for (i2 = 0, query[0] = 0; i2 < ntups2; i2++)
			{
				char	   *tgfunc = PQgetvalue(res2, i2, i_tgfoid);
				int2		tgtype = atoi(PQgetvalue(res2, i2, i_tgtype));
				int			tgnargs = atoi(PQgetvalue(res2, i2, i_tgnargs));
				char	   *tgargs = PQgetvalue(res2, i2, i_tgargs);
				char	   *p;
				char		farg[MAX_QUERY_SIZE];
				int			findx;

				for (findx = 0; findx < numFuncs; findx++)
				{
					if (strcmp(finfo[findx].oid, tgfunc) == 0 &&
						finfo[findx].nargs == 0 &&
						strcmp(finfo[findx].prorettype, "0") == 0)
						break;
				}
				if (findx == numFuncs)
				{
					fprintf(stderr, "getTables(): relation '%s': cannot find function with oid %s for trigger %s\n",
							tblinfo[i].relname, tgfunc, PQgetvalue(res2, i2, i_tgname));
					exit_nicely(g_conn);
				}
				tgfunc = finfo[findx].proname;

#if 0
				/* XXX - how to emit this DROP TRIGGER? */
				if (dropSchema)
				{
					sprintf(query, "DROP TRIGGER %s ON %s;\n",
					 fmtId(PQgetvalue(res2, i2, i_tgname), force_quotes),
							fmtId(tblinfo[i].relname, force_quotes));
					fputs(query, fout);
				}
#endif

				sprintf(query, "CREATE TRIGGER %s ", fmtId(PQgetvalue(res2, i2, i_tgname), force_quotes));
				/* Trigger type */
				findx = 0;
				if (TRIGGER_FOR_BEFORE(tgtype))
					strcat(query, "BEFORE");
				else
					strcat(query, "AFTER");
				if (TRIGGER_FOR_INSERT(tgtype))
				{
					strcat(query, " INSERT");
					findx++;
				}
				if (TRIGGER_FOR_DELETE(tgtype))
				{
					if (findx > 0)
						strcat(query, " OR DELETE");
					else
						strcat(query, " DELETE");
					findx++;
				}
				if (TRIGGER_FOR_UPDATE(tgtype))
				{
					if (findx > 0)
						strcat(query, " OR UPDATE");
					else
						strcat(query, " UPDATE");
				}
				sprintf(query, "%s ON %s FOR EACH ROW EXECUTE PROCEDURE %s (",
				 query, fmtId(tblinfo[i].relname, force_quotes), tgfunc);
				for (findx = 0; findx < tgnargs; findx++)
				{
					char	   *s,
							   *d;

					for (p = tgargs;;)
					{
						p = strchr(p, '\\');
						if (p == NULL)
						{
							fprintf(stderr, "getTables(): relation '%s': bad argument string (%s) for trigger '%s'\n",
									tblinfo[i].relname,
									PQgetvalue(res2, i2, i_tgargs),
									PQgetvalue(res2, i2, i_tgname));
							exit_nicely(g_conn);
						}
						p++;
						if (*p == '\\')
						{
							p++;
							continue;
						}
						if (p[0] == '0' && p[1] == '0' && p[2] == '0')
							break;
					}
					p--;
					for (s = tgargs, d = &(farg[0]); s < p;)
					{
						if (*s == '\'')
							*d++ = '\\';
						*d++ = *s++;
					}
					*d = 0;
					sprintf(query, "%s'%s'%s", query, farg,
							(findx < tgnargs - 1) ? ", " : "");
					tgargs = p + 4;
				}
				strcat(query, ");\n");
				tblinfo[i].triggers[i2] = strdup(query);
			}
			PQclear(res2);
		}
		else
			tblinfo[i].triggers = NULL;
	}

	PQclear(res);

	return tblinfo;

}

/*
 * getInherits
 *	  read all the inheritance information
 * from the system catalogs return them in the InhInfo* structure
 *
 * numInherits is set to the number of tables read in
 *
 *
 */
InhInfo    *
getInherits(int *numInherits)
{
	PGresult   *res;
	int			ntups;
	int			i;
	char		query[MAX_QUERY_SIZE];
	InhInfo    *inhinfo;

	int			i_inhrel;
	int			i_inhparent;

	/* find all the inheritance information */

	sprintf(query, "SELECT inhrel, inhparent from pg_inherits");

	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "getInherits(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	ntups = PQntuples(res);

	*numInherits = ntups;

	inhinfo = (InhInfo *) malloc(ntups * sizeof(InhInfo));

	i_inhrel = PQfnumber(res, "inhrel");
	i_inhparent = PQfnumber(res, "inhparent");

	for (i = 0; i < ntups; i++)
	{
		inhinfo[i].inhrel = strdup(PQgetvalue(res, i, i_inhrel));
		inhinfo[i].inhparent = strdup(PQgetvalue(res, i, i_inhparent));
	}

	PQclear(res);
	return inhinfo;
}

/*
 * getTableAttrs -
 *	  for each table in tblinfo, read its attributes types and names
 *
 * this is implemented in a very inefficient way right now, looping
 * through the tblinfo and doing a join per table to find the attrs and their
 * types
 *
 *	modifies tblinfo
 */
void
getTableAttrs(TableInfo *tblinfo, int numTables)
{
	int			i,
				j;
	char		q[MAX_QUERY_SIZE];
	int			i_attname;
	int			i_typname;
	int			i_atttypmod;
	int			i_attnotnull;
	int			i_atthasdef;
	PGresult   *res;
	int			ntups;

	for (i = 0; i < numTables; i++)
	{

		if (tblinfo[i].sequence)
			continue;

		/* find all the user attributes and their types */
		/* we must read the attribute names in attribute number order! */

		/*
		 * because we will use the attnum to index into the attnames array
		 * later
		 */
		if (g_verbose)
			fprintf(stderr, "%s finding the attrs and types for table: '%s' %s\n",
					g_comment_start,
					tblinfo[i].relname,
					g_comment_end);

		sprintf(q, "SELECT a.attnum, a.attname, t.typname, a.atttypmod, "
				"a.attnotnull, a.atthasdef "
				"from pg_attribute a, pg_type t "
				"where a.attrelid = '%s'::oid and a.atttypid = t.oid "
				"and a.attnum > 0 order by attnum",
				tblinfo[i].oid);
		res = PQexec(g_conn, q);
		if (!res ||
			PQresultStatus(res) != PGRES_TUPLES_OK)
		{
			fprintf(stderr, "getTableAttrs(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
			exit_nicely(g_conn);
		}

		ntups = PQntuples(res);

		i_attname = PQfnumber(res, "attname");
		i_typname = PQfnumber(res, "typname");
		i_atttypmod = PQfnumber(res, "atttypmod");
		i_attnotnull = PQfnumber(res, "attnotnull");
		i_atthasdef = PQfnumber(res, "atthasdef");

		tblinfo[i].numatts = ntups;
		tblinfo[i].attnames = (char **) malloc(ntups * sizeof(char *));
		tblinfo[i].typnames = (char **) malloc(ntups * sizeof(char *));
		tblinfo[i].atttypmod = (int *) malloc(ntups * sizeof(int));
		tblinfo[i].inhAttrs = (int *) malloc(ntups * sizeof(int));
		tblinfo[i].notnull = (bool *) malloc(ntups * sizeof(bool));
		tblinfo[i].adef_expr = (char **) malloc(ntups * sizeof(char *));
		tblinfo[i].parentRels = NULL;
		tblinfo[i].numParents = 0;
		for (j = 0; j < ntups; j++)
		{
			tblinfo[i].attnames[j] = strdup(PQgetvalue(res, j, i_attname));
			tblinfo[i].typnames[j] = strdup(PQgetvalue(res, j, i_typname));
			tblinfo[i].atttypmod[j] = atoi(PQgetvalue(res, j, i_atttypmod));
			tblinfo[i].inhAttrs[j] = 0; /* this flag is set in
										 * flagInhAttrs() */
			tblinfo[i].notnull[j] = (PQgetvalue(res, j, i_attnotnull)[0] == 't') ? true : false;
			if (PQgetvalue(res, j, i_atthasdef)[0] == 't')
			{
				PGresult   *res2;

				if (g_verbose)
					fprintf(stderr, "%s finding DEFAULT expression for attr: '%s' %s\n",
							g_comment_start,
							tblinfo[i].attnames[j],
							g_comment_end);

				sprintf(q, "SELECT adsrc from pg_attrdef "
						"where adrelid = '%s'::oid and adnum = %d ",
						tblinfo[i].oid, j + 1);
				res2 = PQexec(g_conn, q);
				if (!res2 ||
					PQresultStatus(res2) != PGRES_TUPLES_OK)
				{
					fprintf(stderr, "getTableAttrs(): SELECT (for DEFAULT) failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
					exit_nicely(g_conn);
				}
				tblinfo[i].adef_expr[j] = strdup(PQgetvalue(res2, 0, PQfnumber(res2, "adsrc")));
				PQclear(res2);
			}
			else
				tblinfo[i].adef_expr[j] = NULL;
		}
		PQclear(res);
	}
}


/*
 * getIndices
 *	  read all the user-defined indices information
 * from the system catalogs return them in the InhInfo* structure
 *
 * numIndices is set to the number of indices read in
 *
 *
 */
IndInfo    *
getIndices(int *numIndices)
{
	int			i;
	char		query[MAX_QUERY_SIZE];
	PGresult   *res;
	int			ntups;
	IndInfo    *indinfo;

	int			i_indexrelname;
	int			i_indrelname;
	int			i_indamname;
	int			i_indproc;
	int			i_indkey;
	int			i_indclass;
	int			i_indisunique;

	/*
	 * find all the user-defined indices. We do not handle partial
	 * indices.
	 *
	 * Notice we skip indices on inversion objects (relkind 'l')
	 *
	 * this is a 4-way join !!
	 */

	sprintf(query,
		  "SELECT t1.relname as indexrelname, t2.relname as indrelname, "
			"i.indproc, i.indkey, i.indclass, "
			"a.amname as indamname, i.indisunique "
			"from pg_index i, pg_class t1, pg_class t2, pg_am a "
			"where t1.oid = i.indexrelid and t2.oid = i.indrelid "
			"and t1.relam = a.oid and i.indexrelid > '%u'::oid "
			"and t2.relname !~ '^pg_' and t2.relkind != 'l'",
			g_last_builtin_oid);

	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "getIndices(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	ntups = PQntuples(res);

	*numIndices = ntups;

	indinfo = (IndInfo *) malloc(ntups * sizeof(IndInfo));

	i_indexrelname = PQfnumber(res, "indexrelname");
	i_indrelname = PQfnumber(res, "indrelname");
	i_indamname = PQfnumber(res, "indamname");
	i_indproc = PQfnumber(res, "indproc");
	i_indkey = PQfnumber(res, "indkey");
	i_indclass = PQfnumber(res, "indclass");
	i_indisunique = PQfnumber(res, "indisunique");

	for (i = 0; i < ntups; i++)
	{
		indinfo[i].indexrelname = strdup(PQgetvalue(res, i, i_indexrelname));
		indinfo[i].indrelname = strdup(PQgetvalue(res, i, i_indrelname));
		indinfo[i].indamname = strdup(PQgetvalue(res, i, i_indamname));
		indinfo[i].indproc = strdup(PQgetvalue(res, i, i_indproc));
		parseArgTypes((char **) indinfo[i].indkey,
					  (const char *) PQgetvalue(res, i, i_indkey));
		parseArgTypes((char **) indinfo[i].indclass,
					  (const char *) PQgetvalue(res, i, i_indclass));
		indinfo[i].indisunique = strdup(PQgetvalue(res, i, i_indisunique));
	}
	PQclear(res);
	return indinfo;
}

/*
 * dumpTypes
 *	  writes out to fout the queries to recreate all the user-defined types
 *
 */
void
dumpTypes(FILE *fout, FuncInfo *finfo, int numFuncs,
		  TypeInfo *tinfo, int numTypes)
{
	int			i;
	char		q[MAX_QUERY_SIZE];
	int			funcInd;

	for (i = 0; i < numTypes; i++)
	{

		/* skip all the builtin types */
		if (atoi(tinfo[i].oid) < g_last_builtin_oid)
			continue;

		/* skip relation types */
		if (atoi(tinfo[i].typrelid) != 0)
			continue;

		/* skip all array types that start w/ underscore */
		if ((tinfo[i].typname[0] == '_') &&
			(strcmp(tinfo[i].typinput, "array_in") == 0))
			continue;

		/*
		 * before we create a type, we need to create the input and output
		 * functions for it, if they haven't been created already
		 */
		funcInd = findFuncByName(finfo, numFuncs, tinfo[i].typinput);
		if (funcInd != -1)
			dumpOneFunc(fout, finfo, funcInd, tinfo, numTypes);

		funcInd = findFuncByName(finfo, numFuncs, tinfo[i].typoutput);
		if (funcInd != -1)
			dumpOneFunc(fout, finfo, funcInd, tinfo, numTypes);

		becomeUser(fout, tinfo[i].usename);

		if (dropSchema)
		{
			sprintf(q, "DROP TYPE %s;\n", fmtId(tinfo[i].typname, force_quotes));
			fputs(q, fout);
		}

		sprintf(q,
				"CREATE TYPE %s "
				"( internallength = %s, externallength = %s, input = %s, "
				"output = %s, send = %s, receive = %s, default = '%s'",
				fmtId(tinfo[i].typname, force_quotes),
				tinfo[i].typlen,
				tinfo[i].typprtlen,
				tinfo[i].typinput,
				tinfo[i].typoutput,
				tinfo[i].typsend,
				tinfo[i].typreceive,
				tinfo[i].typdefault);

		if (tinfo[i].isArray)
		{
			char	   *elemType;

			elemType = findTypeByOid(tinfo, numTypes, tinfo[i].typelem);

			sprintf(q, "%s, element = %s, delimiter = '%s'",
					q, elemType, tinfo[i].typdelim);
		}
		if (tinfo[i].passedbyvalue)
			strcat(q, ",passedbyvalue);\n");
		else
			strcat(q, ");\n");

		fputs(q, fout);
	}
}

/*
 * dumpProcLangs
 *		  writes out to fout the queries to recreate user-defined procedural languages
 *
 */
void
dumpProcLangs(FILE *fout, FuncInfo *finfo, int numFuncs,
			  TypeInfo *tinfo, int numTypes)
{
	PGresult   *res;
	char		query[MAX_QUERY_SIZE];
	int			ntups;
	int			i_lanname;
	int			i_lanpltrusted;
	int			i_lanplcallfoid;
	int			i_lancompiler;
	char	   *lanname;
	char	   *lancompiler;
	char	   *lanplcallfoid;
	int			i,
				fidx;

	sprintf(query, "SELECT * FROM pg_language "
			"WHERE lanispl "
			"ORDER BY oid");
	res = PQexec(g_conn, query);
	if (!res ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "dumpProcLangs(): SELECT failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}
	ntups = PQntuples(res);

	i_lanname = PQfnumber(res, "lanname");
	i_lanpltrusted = PQfnumber(res, "lanpltrusted");
	i_lanplcallfoid = PQfnumber(res, "lanplcallfoid");
	i_lancompiler = PQfnumber(res, "lancompiler");

	for (i = 0; i < ntups; i++)
	{
		lanplcallfoid = PQgetvalue(res, i, i_lanplcallfoid);
		for (fidx = 0; fidx < numFuncs; fidx++)
		{
			if (!strcmp(finfo[fidx].oid, lanplcallfoid))
				break;
		}
		if (fidx >= numFuncs)
		{
			fprintf(stderr, "dumpProcLangs(): handler procedure for language %s not found\n", PQgetvalue(res, i, i_lanname));
			exit_nicely(g_conn);
		}

		dumpOneFunc(fout, finfo, fidx, tinfo, numTypes);

		lanname = checkForQuote(PQgetvalue(res, i, i_lanname));
		lancompiler = checkForQuote(PQgetvalue(res, i, i_lancompiler));

		if (dropSchema)
			fprintf(fout, "DROP PROCEDURAL LANGUAGE '%s';\n", lanname);

		fprintf(fout, "CREATE %sPROCEDURAL LANGUAGE '%s' "
				"HANDLER %s LANCOMPILER '%s';\n",
		(PQgetvalue(res, i, i_lanpltrusted)[0] == 't') ? "TRUSTED " : "",
				lanname,
				fmtId(finfo[fidx].proname, force_quotes),
				lancompiler);

		free(lanname);
		free(lancompiler);
	}

	PQclear(res);

}

/*
 * dumpFuncs
 *	  writes out to fout the queries to recreate all the user-defined functions
 *
 */
void
dumpFuncs(FILE *fout, FuncInfo *finfo, int numFuncs,
		  TypeInfo *tinfo, int numTypes)
{
	int			i;

	for (i = 0; i < numFuncs; i++)
		dumpOneFunc(fout, finfo, i, tinfo, numTypes);
}

/*
 * dumpOneFunc:
 *	  dump out only one function,  the index of which is given in the third
 *	argument
 *
 */

static void
dumpOneFunc(FILE *fout, FuncInfo *finfo, int i,
			TypeInfo *tinfo, int numTypes)
{
	char		q[MAX_QUERY_SIZE];
	int			j;
	char	   *func_def;
	char		func_lang[NAMEDATALEN + 1];

	if (finfo[i].dumped)
		return;
	else
		finfo[i].dumped = 1;

	becomeUser(fout, finfo[i].usename);

	if (finfo[i].lang == INTERNALlanguageId)
	{
		func_def = finfo[i].prosrc;
		strcpy(func_lang, "INTERNAL");
	}
	else if (finfo[i].lang == ClanguageId)
	{
		func_def = finfo[i].probin;
		strcpy(func_lang, "C");
	}
	else if (finfo[i].lang == SQLlanguageId)
	{
		func_def = finfo[i].prosrc;
		strcpy(func_lang, "SQL");
	}
	else
	{
		PGresult   *res;
		int			nlangs;
		int			i_lanname;
		char		query[256];

		sprintf(query, "SELECT lanname FROM pg_language "
				"WHERE oid = %u",
				finfo[i].lang);
		res = PQexec(g_conn, query);
		if (!res ||
			PQresultStatus(res) != PGRES_TUPLES_OK)
		{
			fprintf(stderr, "dumpOneFunc(): SELECT for procedural language failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
			exit_nicely(g_conn);
		}
		nlangs = PQntuples(res);

		if (nlangs != 1)
		{
			fprintf(stderr, "dumpOneFunc(): procedural language for function %s not found\n", finfo[i].proname);
			exit_nicely(g_conn);
		}

		i_lanname = PQfnumber(res, "lanname");

		func_def = finfo[i].prosrc;
		strcpy(func_lang, PQgetvalue(res, 0, i_lanname));

		PQclear(res);

	}

	if (dropSchema)
	{
		sprintf(q, "DROP FUNCTION %s (", fmtId(finfo[i].proname, force_quotes));
		for (j = 0; j < finfo[i].nargs; j++)
		{
			char	   *typname;

			typname = findTypeByOid(tinfo, numTypes, finfo[i].argtypes[j]);
			sprintf(q, "%s%s%s",
					q,
					(j > 0) ? "," : "",
					fmtId(typname, false));
		}
		sprintf(q, "%s);\n", q);
		fputs(q, fout);
	}

	sprintf(q, "CREATE FUNCTION %s (", fmtId(finfo[i].proname, force_quotes));
	for (j = 0; j < finfo[i].nargs; j++)
	{
		char	   *typname;

		typname = findTypeByOid(tinfo, numTypes, finfo[i].argtypes[j]);
		sprintf(q, "%s%s%s",
				q,
				(j > 0) ? "," : "",
				fmtId(typname, false));
	}
	sprintf(q, "%s ) RETURNS %s%s AS '%s' LANGUAGE '%s';\n",
			q,
			(finfo[i].retset) ? " SETOF " : "",
	   fmtId(findTypeByOid(tinfo, numTypes, finfo[i].prorettype), false),
			func_def, func_lang);

	fputs(q, fout);

}

/*
 * dumpOprs
 *	  writes out to fout the queries to recreate all the user-defined operators
 *
 */
void
dumpOprs(FILE *fout, OprInfo *oprinfo, int numOperators,
		 TypeInfo *tinfo, int numTypes)
{
	int			i;
	char		q[MAX_QUERY_SIZE];
	char		leftarg[MAX_QUERY_SIZE/8];
	char		rightarg[MAX_QUERY_SIZE/8];
	char		commutator[MAX_QUERY_SIZE/8];
	char		negator[MAX_QUERY_SIZE/8];
	char		restrictor[MAX_QUERY_SIZE/8];
	char		join[MAX_QUERY_SIZE/8];
	char		sort1[MAX_QUERY_SIZE/8];
	char		sort2[MAX_QUERY_SIZE/8];

	for (i = 0; i < numOperators; i++)
	{

		/* skip all the builtin oids */
		if (atoi(oprinfo[i].oid) < g_last_builtin_oid)
			continue;

		/*
		 * some operator are invalid because they were the result of user
		 * defining operators before commutators exist
		 */
		if (strcmp(oprinfo[i].oprcode, "-") == 0)
			continue;

		leftarg[0] = '\0';
		rightarg[0] = '\0';

		/*
		 * right unary means there's a left arg and left unary means
		 * there's a right arg
		 */
		if (strcmp(oprinfo[i].oprkind, "r") == 0 ||
			strcmp(oprinfo[i].oprkind, "b") == 0)
		{
			sprintf(leftarg, ",\n\tLEFTARG = %s ",
					fmtId(findTypeByOid(tinfo, numTypes, oprinfo[i].oprleft), false));
		}
		if (strcmp(oprinfo[i].oprkind, "l") == 0 ||
			strcmp(oprinfo[i].oprkind, "b") == 0)
		{
			sprintf(rightarg, ",\n\tRIGHTARG = %s ",
					fmtId(findTypeByOid(tinfo, numTypes, oprinfo[i].oprright), false));
		}
		if (strcmp(oprinfo[i].oprcom, "0") == 0)
			commutator[0] = '\0';
		else
			sprintf(commutator, ",\n\tCOMMUTATOR = %s ",
				 findOprByOid(oprinfo, numOperators, oprinfo[i].oprcom));

		if (strcmp(oprinfo[i].oprnegate, "0") == 0)
			negator[0] = '\0';
		else
			sprintf(negator, ",\n\tNEGATOR = %s ",
			  findOprByOid(oprinfo, numOperators, oprinfo[i].oprnegate));

		if (strcmp(oprinfo[i].oprrest, "-") == 0)
			restrictor[0] = '\0';
		else
			sprintf(restrictor, ",\n\tRESTRICT = %s ", oprinfo[i].oprrest);

		if (strcmp(oprinfo[i].oprjoin, "-") == 0)
			join[0] = '\0';
		else
			sprintf(join, ",\n\tJOIN = %s ", oprinfo[i].oprjoin);

		if (strcmp(oprinfo[i].oprlsortop, "0") == 0)
			sort1[0] = '\0';
		else
			sprintf(sort1, ",\n\tSORT1 = %s ",
			 findOprByOid(oprinfo, numOperators, oprinfo[i].oprlsortop));

		if (strcmp(oprinfo[i].oprrsortop, "0") == 0)
			sort2[0] = '\0';
		else
			sprintf(sort2, ",\n\tSORT2 = %s ",
			 findOprByOid(oprinfo, numOperators, oprinfo[i].oprrsortop));

		becomeUser(fout, oprinfo[i].usename);

		if (dropSchema)
		{
			sprintf(q, "DROP OPERATOR %s (%s, %s);\n", oprinfo[i].oprname,
					fmtId(findTypeByOid(tinfo, numTypes, oprinfo[i].oprleft), false),
					fmtId(findTypeByOid(tinfo, numTypes, oprinfo[i].oprright), false));
			fputs(q, fout);
		}

		sprintf(q,
				"CREATE OPERATOR %s "
				"(PROCEDURE = %s %s%s%s%s%s%s%s%s%s);\n",
				oprinfo[i].oprname,
				oprinfo[i].oprcode,
				leftarg,
				rightarg,
				commutator,
				negator,
				restrictor,
		  (strcmp(oprinfo[i].oprcanhash, "t") == 0) ? ",\n\tHASHES" : "",
				join,
				sort1,
				sort2);

		fputs(q, fout);
	}
}

/*
 * dumpAggs
 *	  writes out to fout the queries to create all the user-defined aggregates
 *
 */
void
dumpAggs(FILE *fout, AggInfo *agginfo, int numAggs,
		 TypeInfo *tinfo, int numTypes)
{
	int			i;
	char		q[MAX_QUERY_SIZE];
	char		sfunc1[MAX_QUERY_SIZE];
	char		sfunc2[MAX_QUERY_SIZE];
	char		basetype[MAX_QUERY_SIZE];
	char		finalfunc[MAX_QUERY_SIZE];
	char		comma1[2],
				comma2[2];

	for (i = 0; i < numAggs; i++)
	{
		/* skip all the builtin oids */
		if (atoi(agginfo[i].oid) < g_last_builtin_oid)
			continue;

		sprintf(basetype,
				"BASETYPE = %s, ",
				fmtId(findTypeByOid(tinfo, numTypes, agginfo[i].aggbasetype), false));

		if (strcmp(agginfo[i].aggtransfn1, "-") == 0)
			sfunc1[0] = '\0';
		else
		{
			sprintf(sfunc1,
					"SFUNC1 = %s, STYPE1 = %s",
					agginfo[i].aggtransfn1,
					fmtId(findTypeByOid(tinfo, numTypes, agginfo[i].aggtranstype1), false));
			if (agginfo[i].agginitval1)
				sprintf(sfunc1, "%s, INITCOND1 = '%s'",
						sfunc1, agginfo[i].agginitval1);

		}

		if (strcmp(agginfo[i].aggtransfn2, "-") == 0)
			sfunc2[0] = '\0';
		else
		{
			sprintf(sfunc2,
					"SFUNC2 = %s, STYPE2 = %s",
					agginfo[i].aggtransfn2,
					fmtId(findTypeByOid(tinfo, numTypes, agginfo[i].aggtranstype2), false));
			if (agginfo[i].agginitval2)
				sprintf(sfunc2, "%s, INITCOND2 = '%s'",
						sfunc2, agginfo[i].agginitval2);
		}

		if (strcmp(agginfo[i].aggfinalfn, "-") == 0)
			finalfunc[0] = '\0';
		else
			sprintf(finalfunc, "FINALFUNC = %s", agginfo[i].aggfinalfn);
		if (sfunc1[0] != '\0' && sfunc2[0] != '\0')
		{
			comma1[0] = ',';
			comma1[1] = '\0';
		}
		else
			comma1[0] = '\0';

		if (finalfunc[0] != '\0' && (sfunc1[0] != '\0' || sfunc2[0] != '\0'))
		{
			comma2[0] = ',';
			comma2[1] = '\0';
		}
		else
			comma2[0] = '\0';

		becomeUser(fout, agginfo[i].usename);

		if (dropSchema)
		{
			sprintf(q, "DROP AGGREGATE %s %s;\n", agginfo[i].aggname,
					fmtId(findTypeByOid(tinfo, numTypes, agginfo[i].aggbasetype), false));
			fputs(q, fout);
		}

		sprintf(q, "CREATE AGGREGATE %s ( %s %s%s %s%s %s );\n",
				agginfo[i].aggname,
				basetype,
				sfunc1,
				comma1,
				sfunc2,
				comma2,
				finalfunc);

		fputs(q, fout);
	}
}

/*
 * These are some support functions to fix the acl problem of pg_dump
 *
 * Matthew C. Aycock 12/02/97
 */

/* Append a keyword to a keyword list, inserting comma if needed.
 * Caller must make aclbuf big enough for all possible keywords.
 */
static void
AddAcl(char *aclbuf, const char *keyword)
{
	if (*aclbuf)
		strcat(aclbuf, ",");
	strcat(aclbuf, keyword);
}

/*
 * This will take a string of 'arwR' and return a malloced,
 * comma delimited string of SELECT,INSERT,UPDATE,DELETE,RULE
 */
static char *
GetPrivileges(const char *s)
{
	char		aclbuf[100];

	aclbuf[0] = '\0';

	if (strchr(s, 'a'))
		AddAcl(aclbuf, "INSERT");

	if (strchr(s, 'w'))
		AddAcl(aclbuf, "UPDATE,DELETE");

	if (strchr(s, 'r'))
		AddAcl(aclbuf, "SELECT");

	if (strchr(s, 'R'))
		AddAcl(aclbuf, "RULE");

	/* Special-case when they're all there */
	if (strcmp(aclbuf, "INSERT,UPDATE,DELETE,SELECT,RULE") == 0)
		return strdup("ALL");

	return strdup(aclbuf);
}

/*
 * dumpACL:
 *	  Write out grant/revoke information
 *	  Called for sequences and tables
 */

static void
dumpACL(FILE *fout, TableInfo tbinfo)
{
	const char *acls = tbinfo.relacl;
	char	   *aclbuf,
			   *tok,
			   *eqpos,
			   *priv;

	if (strlen(acls) == 0)
		return;					/* table has default permissions */

	/*
	 * Revoke Default permissions for PUBLIC. Is this actually necessary,
	 * or is it just a waste of time?
	 */
	fprintf(fout,
			"REVOKE ALL on %s from PUBLIC;\n",
			fmtId(tbinfo.relname, force_quotes));

	/* Make a working copy of acls so we can use strtok */
	aclbuf = strdup(acls);

	/* Scan comma-separated ACL items */
	for (tok = strtok(aclbuf, ","); tok != NULL; tok = strtok(NULL, ","))
	{
		/*
		 * Token may start with '{' and/or '"'.  Actually only the start
		 * of the string should have '{', but we don't verify that.
		 */
		if (*tok == '{')
			tok++;
		if (*tok == '"')
			tok++;

		/* User name is string up to = in tok */
		eqpos = strchr(tok, '=');
		if (!eqpos)
		{
			fprintf(stderr, "Could not parse ACL list for '%s'...Exiting!\n",
					tbinfo.relname);
			exit_nicely(g_conn);
		}

		/*
		 * Parse the privileges (right-hand side).	Skip if there are
		 * none.
		 */
		priv = GetPrivileges(eqpos + 1);
		if (*priv)
		{
			fprintf(fout,
					"GRANT %s on %s to ",
					priv, fmtId(tbinfo.relname, force_quotes));

			/*
			 * Note: fmtId() can only be called once per printf, so don't
			 * try to merge printing of username into the above printf.
			 */
			if (eqpos == tok)
			{
				/* Empty left-hand side means "PUBLIC" */
				fprintf(fout, "PUBLIC;\n");
			}
			else
			{
				*eqpos = '\0';	/* it's ok to clobber aclbuf */
				if (strncmp(tok, "group ", strlen("group ")) == 0)
					fprintf(fout, "GROUP %s;\n",
							fmtId(tok + strlen("group "), force_quotes));
				else
					fprintf(fout, "%s;\n", fmtId(tok, force_quotes));
			}
		}
		free(priv);
	}

	free(aclbuf);
}


/*
 * dumpTables:
 *	  write out to fout all the user-define tables
 */

void
dumpTables(FILE *fout, TableInfo *tblinfo, int numTables,
		   InhInfo *inhinfo, int numInherits,
		   TypeInfo *tinfo, int numTypes, const char *tablename,
		   const bool aclsSkip)
{
	int			i,
				j,
				k;
	char		q[MAX_QUERY_SIZE];
	char	   *serialSeq = NULL;		/* implicit sequence name created
										 * by SERIAL datatype */
	const char *serialSeqSuffix = "_id_seq";	/* suffix for implicit
												 * SERIAL sequences */
	char	  **parentRels;		/* list of names of parent relations */
	int			numParents;
	int			actual_atts;	/* number of attrs in this CREATE statment */
	int32		tmp_typmod;
	int			precision;
	int			scale;


	/* First - dump SEQUENCEs */
	if (tablename)
	{
		serialSeq = malloc(strlen(tablename) + strlen(serialSeqSuffix) + 1);
		strcpy(serialSeq, tablename);
		strcat(serialSeq, serialSeqSuffix);
	}
	for (i = 0; i < numTables; i++)
	{
		if (!(tblinfo[i].sequence))
			continue;
		if (!tablename || (!strcmp(tblinfo[i].relname, tablename))
			|| (serialSeq && !strcmp(tblinfo[i].relname, serialSeq)))
		{
			becomeUser(fout, tblinfo[i].usename);
			dumpSequence(fout, tblinfo[i]);
			if (!aclsSkip)
				dumpACL(fout, tblinfo[i]);
		}
	}
	if (tablename)
		free(serialSeq);

	for (i = 0; i < numTables; i++)
	{
		if (tblinfo[i].sequence)/* already dumped */
			continue;

		if (!tablename || (!strcmp(tblinfo[i].relname, tablename)))
		{

			/* Skip VIEW relations */

			/*
			 * if (isViewRule(tblinfo[i].relname)) continue;
			 */

			parentRels = tblinfo[i].parentRels;
			numParents = tblinfo[i].numParents;

			becomeUser(fout, tblinfo[i].usename);

			if (dropSchema)
			{
				sprintf(q, "DROP TABLE %s;\n", fmtId(tblinfo[i].relname, force_quotes));
				fputs(q, fout);
			}

			sprintf(q, "CREATE TABLE %s (\n\t", fmtId(tblinfo[i].relname, force_quotes));
			actual_atts = 0;
			for (j = 0; j < tblinfo[i].numatts; j++)
			{
				if (tblinfo[i].inhAttrs[j] == 0)
				{
					if (actual_atts > 0)
						strcat(q, ",\n\t");
					sprintf(q + strlen(q), "%s ",
							fmtId(tblinfo[i].attnames[j], force_quotes));

					/* Show lengths on bpchar and varchar */
					if (!strcmp(tblinfo[i].typnames[j], "bpchar"))
					{
						int			len = (tblinfo[i].atttypmod[j] - VARHDRSZ);

						sprintf(q + strlen(q), "character");
						if (len > 1)
							sprintf(q + strlen(q), "(%d)",
									tblinfo[i].atttypmod[j] - VARHDRSZ);
					}
					else if (!strcmp(tblinfo[i].typnames[j], "varchar"))
					{
						sprintf(q + strlen(q), "character varying");
						if (tblinfo[i].atttypmod[j] != -1)
						{
							sprintf(q + strlen(q), "(%d)",
									tblinfo[i].atttypmod[j] - VARHDRSZ);
						}
					}
					else if (!strcmp(tblinfo[i].typnames[j], "numeric"))
					{
						sprintf(q + strlen(q), "numeric");
						if (tblinfo[i].atttypmod[j] != -1)
						{
							tmp_typmod = tblinfo[i].atttypmod[j] - VARHDRSZ;
							precision = (tmp_typmod >> 16) & 0xffff;
							scale = tmp_typmod & 0xffff;
							sprintf(q + strlen(q), "(%d,%d)",
									precision, scale);
						}
					}

					/*
					 * char is an internal single-byte data type; Let's
					 * make sure we force it through with quotes. - thomas
					 * 1998-12-13
					 */
					else if (!strcmp(tblinfo[i].typnames[j], "char"))
					{
						sprintf(q + strlen(q), "%s",
								fmtId(tblinfo[i].typnames[j], true));
					}
					else
					{
						sprintf(q + strlen(q), "%s",
								fmtId(tblinfo[i].typnames[j], false));
					}
					if (tblinfo[i].adef_expr[j] != NULL)
						sprintf(q + strlen(q), " DEFAULT %s",
								tblinfo[i].adef_expr[j]);
					if (tblinfo[i].notnull[j])
						strcat(q, " NOT NULL");
					actual_atts++;
				}
			}

			/* put the CONSTRAINTS inside the table def */
			for (k = 0; k < tblinfo[i].ncheck; k++)
			{
				if (actual_atts + k > 0)
					strcat(q, ",\n\t");
				sprintf(q + strlen(q), "%s",
						tblinfo[i].check_expr[k]);
			}

			strcat(q, ")");

			if (numParents > 0)
			{
				strcat(q, "\ninherits (");
				for (k = 0; k < numParents; k++)
				{
					sprintf(q + strlen(q), "%s%s",
							(k > 0) ? ", " : "",
							fmtId(parentRels[k], force_quotes));
				}
				strcat(q, ")");
			}

			strcat(q, ";\n");
			fputs(q, fout);
			if (!aclsSkip)
				dumpACL(fout, tblinfo[i]);

		}
	}
}

/*
 * dumpIndices:
 *	  write out to fout all the user-define indices
 */
void
dumpIndices(FILE *fout, IndInfo *indinfo, int numIndices,
			TableInfo *tblinfo, int numTables, const char *tablename)
{
	int			i,
				k;
	int			tableInd;
	char		attlist[1000];
	char	   *classname[INDEX_MAX_KEYS];
	char	   *funcname;		/* the name of the function to comput the
								 * index key from */
	int			indkey,
				indclass;
	int			nclass;

	char		q[MAX_QUERY_SIZE],
				id1[MAX_QUERY_SIZE],
				id2[MAX_QUERY_SIZE];
	PGresult   *res;

	for (i = 0; i < numIndices; i++)
	{
		tableInd = findTableByName(tblinfo, numTables,
								   indinfo[i].indrelname);
		if (tableInd < 0)
		{
			fprintf(stderr, "failed sanity check, table %s was not found\n",
					indinfo[i].indrelname);
			exit(2);
		}

		if (strcmp(indinfo[i].indproc, "0") == 0)
			funcname = NULL;
		else
		{

			/*
			 * the funcname is an oid which we use to find the name of the
			 * pg_proc.  We need to do this because getFuncs() only reads
			 * in the user-defined funcs not all the funcs.  We might not
			 * find what we want by looking in FuncInfo*
			 */
			sprintf(q,
					"SELECT proname from pg_proc "
					"where pg_proc.oid = '%s'::oid",
					indinfo[i].indproc);
			res = PQexec(g_conn, q);
			if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
			{
				fprintf(stderr, "dumpIndices(): SELECT (funcname) failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
				exit_nicely(g_conn);
			}
			funcname = strdup(PQgetvalue(res, 0,
										 PQfnumber(res, "proname")));
			PQclear(res);
		}

		/* convert opclass oid(s) into names */
		for (nclass = 0; nclass < INDEX_MAX_KEYS; nclass++)
		{
			indclass = atoi(indinfo[i].indclass[nclass]);
			if (indclass == 0)
				break;
			sprintf(q,
					"SELECT opcname from pg_opclass "
					"where pg_opclass.oid = '%u'::oid",
					indclass);
			res = PQexec(g_conn, q);
			if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
			{
				fprintf(stderr, "dumpIndices(): SELECT (classname) failed.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
				exit_nicely(g_conn);
			}
			classname[nclass] = strdup(PQgetvalue(res, 0,
											 PQfnumber(res, "opcname")));
			PQclear(res);
		}

		if (funcname && nclass != 1)
		{
			fprintf(stderr, "dumpIndices(): Must be exactly one OpClass "
					"for functional index %s\n", indinfo[i].indexrelname);
			exit_nicely(g_conn);
		}

		/* convert attribute numbers into attribute list */
		for (k = 0, attlist[0] = 0; k < INDEX_MAX_KEYS; k++)
		{
			char	   *attname;

			indkey = atoi(indinfo[i].indkey[k]);
			if (indkey == InvalidAttrNumber)
				break;
			indkey--;
			if (indkey == ObjectIdAttributeNumber - 1)
				attname = "oid";
			else
				attname = tblinfo[tableInd].attnames[indkey];
			if (funcname)
				sprintf(attlist + strlen(attlist), "%s%s",
					 (k == 0) ? "" : ", ", fmtId(attname, force_quotes));
			else
			{
				if (k >= nclass)
				{
					fprintf(stderr, "dumpIndices(): OpClass not found for "
							"attribute '%s' of index '%s'\n",
							attname, indinfo[i].indexrelname);
					exit_nicely(g_conn);
				}
				strcpy(id1, fmtId(attname, force_quotes));
				strcpy(id2, fmtId(classname[k], force_quotes));
				sprintf(attlist + strlen(attlist), "%s%s %s",
						(k == 0) ? "" : ", ", id1, id2);
				free(classname[k]);
			}
		}

		if (!tablename || (!strcmp(indinfo[i].indrelname, tablename)))
		{

			/*
			 * We make the index belong to the owner of its table, which
			 * is not necessarily right but should answer 99% of the time.
			 * Would have to add owner name to IndInfo to do it right.
			 */
			becomeUser(fout, tblinfo[tableInd].usename);

			strcpy(id1, fmtId(indinfo[i].indexrelname, force_quotes));
			strcpy(id2, fmtId(indinfo[i].indrelname, force_quotes));

			if (dropSchema)
			{
				sprintf(q, "DROP INDEX %s;\n", id1);
				fputs(q, fout);
			}

			fprintf(fout, "CREATE %s INDEX %s on %s using %s (",
			  (strcmp(indinfo[i].indisunique, "t") == 0) ? "UNIQUE" : "",
					id1,
					id2,
					indinfo[i].indamname);
			if (funcname)
			{
				/* need 2 printf's here cuz fmtId has static return area */
				fprintf(fout, " %s", fmtId(funcname, false));
				fprintf(fout, " (%s) %s );\n", attlist, fmtId(classname[0], force_quotes));
				free(funcname);
				free(classname[0]);
			}
			else
				fprintf(fout, " %s );\n", attlist);
		}
	}

}

/*
 * dumpTuples
 *	  prints out the tuples in ASCII representation. The output is a valid
 *	  input to COPY FROM stdin.
 *
 *	  We only need to do this for POSTGRES 4.2 databases since the
 *	  COPY TO statment doesn't escape newlines properly. It's been fixed
 *	  in PostgreSQL.
 *
 * the attrmap passed in tells how to map the attributes copied in to the
 * attributes copied out
 */
#ifdef NOT_USED
void
dumpTuples(PGresult *res, FILE *fout, int *attrmap)
{
	int			j,
				k;
	int			m,
				n;
	char	  **outVals = NULL; /* values to copy out */

	n = PQntuples(res);
	m = PQnfields(res);

	if (m > 0)
	{

		/*
		 * Print out the tuples but only print tuples with at least 1
		 * field.
		 */
		outVals = (char **) malloc(m * sizeof(char *));

		for (j = 0; j < n; j++)
		{
			for (k = 0; k < m; k++)
				outVals[attrmap[k]] = PQgetvalue(res, j, k);
			for (k = 0; k < m; k++)
			{
				char	   *pval = outVals[k];

				if (k != 0)
					fputc('\t', fout);	/* delimiter for attribute */

				if (pval)
				{
					while (*pval != '\0')
					{
						/* escape tabs, newlines and backslashes */
						if (*pval == '\t' || *pval == '\n' || *pval == '\\')
							fputc('\\', fout);
						fputc(*pval, fout);
						pval++;
					}
				}
			}
			fputc('\n', fout);	/* delimiter for a tuple */
		}
		free(outVals);
	}
}

#endif

/*
 * setMaxOid -
 * find the maximum oid and generate a COPY statement to set it
*/

static void
setMaxOid(FILE *fout)
{
	PGresult   *res;
	Oid			max_oid;

	res = PQexec(g_conn, "CREATE TABLE pgdump_oid (dummy int4)");
	if (!res ||
		PQresultStatus(res) != PGRES_COMMAND_OK)
	{
		fprintf(stderr, "Can not create pgdump_oid table.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}
	PQclear(res);
	res = PQexec(g_conn, "INSERT INTO pgdump_oid VALUES (0)");
	if (!res ||
		PQresultStatus(res) != PGRES_COMMAND_OK)
	{
		fprintf(stderr, "Can not insert into pgdump_oid table.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}
	max_oid = atol(PQoidStatus(res));
	if (max_oid == 0)
	{
		fprintf(stderr, "Invalid max id in setMaxOid\n");
		exit_nicely(g_conn);
	}
	PQclear(res);
	res = PQexec(g_conn, "DROP TABLE pgdump_oid;");
	if (!res ||
		PQresultStatus(res) != PGRES_COMMAND_OK)
	{
		fprintf(stderr, "Can not drop pgdump_oid table.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}
	PQclear(res);
	if (g_verbose)
		fprintf(stderr, "%s maximum system oid is %u %s\n",
				g_comment_start, max_oid, g_comment_end);
	fprintf(fout, "CREATE TABLE pgdump_oid (dummy int4);\n");
	fprintf(fout, "COPY pgdump_oid WITH OIDS FROM stdin;\n");
	fprintf(fout, "%-d\t0\n", max_oid);
	fprintf(fout, "\\.\n");
	fprintf(fout, "DROP TABLE pgdump_oid;\n");
}

/*
 * findLastBuiltInOid -
 * find the last built in oid
 * we do this by looking up the oid of 'template1' in pg_database,
 * this is probably not foolproof but comes close
*/

static int
findLastBuiltinOid(void)
{
	PGresult   *res;
	int			ntups;
	int			last_oid;

	res = PQexec(g_conn,
			  "SELECT oid from pg_database where datname = 'template1'");
	if (res == NULL ||
		PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "pg_dump error in finding the template1 database.  Explanation from backend: '%s'.\n", PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}
	ntups = PQntuples(res);
	if (ntups != 1)
	{
		fprintf(stderr, "pg_dump: couldn't find the template1 database.  "
				"You are really hosed.\nGiving up.\n");
		exit_nicely(g_conn);
	}
	last_oid = atoi(PQgetvalue(res, 0, PQfnumber(res, "oid")));
	PQclear(res);
	return last_oid;
}


/*
 * checkForQuote:
 *	  checks a string for quote characters and quotes them
 */
static char *
checkForQuote(const char *s)
{
	char	   *r;
	char		c;
	char	   *result;

	int			j = 0;

	r = malloc(strlen(s) * 3 + 1);		/* definitely long enough */

	while ((c = *s) != '\0')
	{

		if (c == '\'')
		{
			r[j++] = '\'';		/* quote the single quotes */
		}
		r[j++] = c;
		s++;
	}
	r[j] = '\0';

	result = strdup(r);
	free(r);

	return result;

}


static void
dumpSequence(FILE *fout, TableInfo tbinfo)
{
	PGresult   *res;
	int4		last,
				incby,
				maxv,
				minv,
				cache;
	char		cycled,
				called,
			   *t;
	char		query[MAX_QUERY_SIZE];

	sprintf(query,
			"SELECT sequence_name, last_value, increment_by, max_value, "
			"min_value, cache_value, is_cycled, is_called from %s",
			fmtId(tbinfo.relname, force_quotes));

	res = PQexec(g_conn, query);
	if (!res || PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "dumpSequence(%s): SELECT failed.  Explanation from backend: '%s'.\n", tbinfo.relname, PQerrorMessage(g_conn));
		exit_nicely(g_conn);
	}

	if (PQntuples(res) != 1)
	{
		fprintf(stderr, "dumpSequence(%s): %d (!= 1) tuples returned by SELECT\n",
				tbinfo.relname, PQntuples(res));
		exit_nicely(g_conn);
	}

	if (strcmp(PQgetvalue(res, 0, 0), tbinfo.relname) != 0)
	{
		fprintf(stderr, "dumpSequence(%s): different sequence name "
				"returned by SELECT: %s\n",
				tbinfo.relname, PQgetvalue(res, 0, 0));
		exit_nicely(g_conn);
	}


	last = atoi(PQgetvalue(res, 0, 1));
	incby = atoi(PQgetvalue(res, 0, 2));
	maxv = atoi(PQgetvalue(res, 0, 3));
	minv = atoi(PQgetvalue(res, 0, 4));
	cache = atoi(PQgetvalue(res, 0, 5));
	t = PQgetvalue(res, 0, 6);
	cycled = *t;
	t = PQgetvalue(res, 0, 7);
	called = *t;

	PQclear(res);

	if (dropSchema)
	{
		sprintf(query, "DROP SEQUENCE %s;\n", fmtId(tbinfo.relname, force_quotes));
		fputs(query, fout);
	}

	sprintf(query,
			"CREATE SEQUENCE %s start %d increment %d maxvalue %d "
			"minvalue %d  cache %d %s;\n",
	 fmtId(tbinfo.relname, force_quotes), last, incby, maxv, minv, cache,
			(cycled == 't') ? "cycle" : "");

	fputs(query, fout);

	if (called == 'f')
		return;					/* nothing to do more */

	sprintf(query, "SELECT nextval ('%s');\n", fmtId(tbinfo.relname, force_quotes));
	fputs(query, fout);

}


static void
dumpTriggers(FILE *fout, const char *tablename,
			 TableInfo *tblinfo, int numTables)
{
	int			i,
				j;

	if (g_verbose)
		fprintf(stderr, "%s dumping out triggers %s\n",
				g_comment_start, g_comment_end);

	for (i = 0; i < numTables; i++)
	{
		if (tablename && strcmp(tblinfo[i].relname, tablename))
			continue;
		for (j = 0; j < tblinfo[i].ntrig; j++)
		{
			becomeUser(fout, tblinfo[i].usename);
			fputs(tblinfo[i].triggers[j], fout);
		}
	}
}


static void
dumpRules(FILE *fout, const char *tablename,
		  TableInfo *tblinfo, int numTables)
{
	PGresult   *res;
	int			nrules;
	int			i,
				t;
	char		query[MAX_QUERY_SIZE];

	int			i_definition;

	if (g_verbose)
		fprintf(stderr, "%s dumping out rules %s\n",
				g_comment_start, g_comment_end);

	/*
	 * For each table we dump
	 */
	for (t = 0; t < numTables; t++)
	{
		if (tablename && strcmp(tblinfo[t].relname, tablename))
			continue;

		/*
		 * Get all rules defined for this table
		 */
		sprintf(query, "SELECT pg_get_ruledef(pg_rewrite.rulename) "
				"AS definition FROM pg_rewrite, pg_class "
				"WHERE pg_class.relname = '%s' "
				"AND pg_rewrite.ev_class = pg_class.oid "
				"ORDER BY pg_rewrite.oid",
				tblinfo[t].relname);
		res = PQexec(g_conn, query);
		if (!res ||
			PQresultStatus(res) != PGRES_TUPLES_OK)
		{
			fprintf(stderr, "dumpRules(): SELECT failed for table %s.  Explanation from backend: '%s'.\n",
					tblinfo[t].relname, PQerrorMessage(g_conn));
			exit_nicely(g_conn);
		}

		nrules = PQntuples(res);
		i_definition = PQfnumber(res, "definition");

		/*
		 * Dump them out
		 */
		for (i = 0; i < nrules; i++)
			fprintf(fout, "%s\n", PQgetvalue(res, i, i_definition));

		PQclear(res);
	}
}


/* Issue a psql \connect command to become the specified user.
 * We want to do this only if we are dumping ACLs,
 * and only if the new username is different from the last one
 * (to avoid the overhead of useless backend launches).
 */

static void
becomeUser(FILE *fout, const char *username)
{
	static const char *lastusername = "";

	if (aclsSkip)
		return;

	if (strcmp(lastusername, username) == 0)
		return;

	fprintf(fout, "\\connect - %s\n", username);

	lastusername = username;
}
