/*-------------------------------------------------------------------------
*
* 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
*
* the output script is SQL that is understood by Postgres95
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/bin/pg_dump/pg_dump.c,v 1.25 1997/03/01 15:24:51 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)
*
*-------------------------------------------------------------------------
*/
#include <stdlib.h>
#include <unistd.h> /* for getopt() */
#include <stdio.h>
#include <string.h>
#include <sys/param.h> /* for MAXHOSTNAMELEN on most */
#ifdef sparc_solaris
#include <netdb.h> /* for MAXHOSTNAMELEN on some */
#endif
#include "postgres.h"
#include "access/htup.h"
#include "catalog/pg_type.h"
#include "libpq-fe.h"
#ifndef HAVE_STRDUP
#include "strdup.h"
#endif
#include "pg_dump.h"
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 */
int dumpData; /* dump data using proper insert strings */
int attrNames; /* put attr names into insert strings */
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,
"%s - version 1.13.dhb.2\n\n",progname);
fprintf(stderr,
"usage: %s [options] [dbname]\n",progname);
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 -p port \t\t server port number\n");
fprintf(stderr,
"\t -v \t\t verbose\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 -S \t\t dump out only the schema, no data\n");
fprintf(stderr,
"\t -a \t\t dump out only the data, no schema\n");
fprintf(stderr,
"\t -t table \t\t dump for this table only\n");
fprintf(stderr,
"\t -o \t\t dump object id's (oids)\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
*
*/
bool
isViewRule(char *relname)
{
PGresult *res;
int ntups;
char query[MAXQUERYLEN];
res = PQexec(g_conn, "begin");
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr,"BEGIN command failed\n");
exit_nicely(g_conn);
}
PQclear(res);
sprintf(query, "select relname from pg_class, pg_rewrite "
"where pg_class.oid = ev_class "
"and rulename = '_RET%s'", relname);
res = PQexec(g_conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr,"isViewRule(): SELECT failed\n");
exit_nicely(g_conn);
}
ntups = PQntuples(res);
PQclear(res);
res = PQexec(g_conn, "end");
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) {
fprintf(fout, "COPY %s WITH OIDS FROM stdin;\n",
classname);
sprintf(query, "COPY %s WITH OIDS TO stdout;\n",
classname);
} else {
fprintf(fout, "COPY %s FROM stdin;\n", classname);
sprintf(query, "COPY %s TO stdout;\n", classname);
}
res = PQexec(g_conn, query);
if (!res) {
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(res->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");
}
PQclear(res);
ret = PQendcopy(res->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);
exit_nicely(g_conn);
}
}
}
static void
dumpClasses_dumpData(FILE *fout, const char *classname,
const TableInfo tblinfo, bool oids) {
PGresult *res;
char query[255];
int actual_atts; /* number of attrs in this a table */
char expandbuf[COPYBUFSIZ];
char q[MAXQUERYLEN];
int tuple;
int field;
sprintf(query, "select * from %s;\n", classname);
res = PQexec(g_conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr,"dumpClasses(): command failed\n");
exit_nicely(g_conn);
}
tuple=0;
while(tuple < PQntuples(res)) {
fprintf(fout, "insert into %s ", classname);
if (attrNames) {
int j;
actual_atts = 0;
sprintf(q, "(");
for (j=0;j<tblinfo.numatts;j++) {
if (tblinfo.inhAttrs[j] == 0) {
sprintf(q, "%s%s%s",
q,
(actual_atts > 0) ? "," : "",
tblinfo.attnames[j]);
actual_atts++;
}
}
sprintf(q,"%s%s",q, ") ");
fprintf(fout, q);
}
fprintf(fout, "values (");
field=0;
do {
if (PQgetisnull(res,tuple,field)) {
fprintf(fout,"NULL");
} else {
switch(PQftype(res,field)) {
case INT2OID: case INT4OID: case OIDOID: /* int types */
case FLOAT4OID: case FLOAT8OID: /* float types */
fprintf(fout, "%s",
PQgetvalue(res,tuple,field));
break;
default: {
char *expsrc,*expdest;
/* Before outputting string value, expand all
single quotes to twin single quotes -
dhb - 6/11/96 */
expsrc=PQgetvalue(res,tuple,field);
expdest=expandbuf;
while (*expsrc) {
*expdest++=*expsrc;
if (*expsrc == (char)0x27) /*single quote*/
*expdest++ = *expsrc;
expsrc++;
}
*expdest=*expsrc; /* null term. */
fprintf(fout, "'%s'", expandbuf);
}
break;
}
}
field++;
if(field != PQnfields(res))
fprintf(fout, ",");
} while(field < PQnfields(res));
fprintf(fout, ");\n");
tuple++;
}
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 = "one";
if (g_verbose)
fprintf(stderr, "%s dumping out the contents of %s of %d tables %s\n",
g_comment_start, all_only, numTables, g_comment_end);
for(i = 0; i < numTables; i++) {
const char *classname = tblinfo[i].relname;
/* Skip VIEW relations */
if (isViewRule(tblinfo[i].relname))
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);
/* skip archive names*/
if (isArchiveName(classname))
continue;
if(!dumpData)
dumpClasses_nodumpData(fout, classname, oids);
else
dumpClasses_dumpData(fout, classname, tblinfo[i], oids);
}
}
}
int
main(int argc, char** argv)
{
int c;
const char* progname;
const char* filename;
const char* dbname;
int schemaOnly;
int dataOnly;
const char *pghost = NULL;
const char *pgport = NULL;
const char *tablename;
int oids;
TableInfo *tblinfo;
int numTables;
dbname = NULL;
filename = NULL;
tablename = NULL;
g_verbose = false;
oids = 0;
strcpy(g_comment_start,"-- ");
g_comment_end[0] = '\0';
strcpy(g_opaque_type, "opaque");
dataOnly = schemaOnly = dumpData = attrNames = 0;
progname = *argv;
while ((c = getopt(argc, argv,"f:H:p:t:vSDdDao")) != EOF) {
switch(c) {
case 'f': /* output file name */
filename = optarg;
break;
case 'H' : /* server host */
pghost = optarg;
break;
case 'p' : /* server port */
pgport = optarg;
break;
case 'v': /* verbose */
g_verbose = true;
break;
case 'S': /* dump schema only */
schemaOnly = 1;
break;
case 'd': /* dump data as proper insert strings */
dumpData = 1;
break;
case 'D': /* dump data as proper insert strings with attr names */
dumpData = 1;
attrNames = 1;
break;
case 't': /* Dump data for this table only */
tablename = optarg;
break;
case 'a': /* Dump data only */
dataOnly = 1;
break;
case 'o': /* Dump oids */
oids = 1;
break;
default:
usage(progname);
break;
}
}
/* open the output file */
if (filename == NULL) {
g_fout = stdout;
} else {
g_fout = fopen(filename, "w");
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);
/* 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);
}
g_last_builtin_oid = findLastBuiltinOid();
if (oids)
setMaxOid(g_fout);
if (!dataOnly) {
if (g_verbose)
fprintf(stderr, "%s last builtin oid is %d %s\n",
g_comment_start, g_last_builtin_oid, g_comment_end);
tblinfo = dumpSchema(g_fout, &numTables, tablename);
}
else
tblinfo = dumpSchema(NULL, &numTables, tablename);
if (!schemaOnly) {
dumpClasses(tblinfo, numTables, g_fout, tablename, oids);
}
if (!dataOnly) /* dump indexes at the end for performance */
dumpSchemaIdx(g_fout, &numTables, tablename, tblinfo, numTables);
fflush(g_fout);
fclose(g_fout);
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[MAXQUERYLEN];
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;
res = PQexec(g_conn, "begin");
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr,"BEGIN command failed\n");
exit_nicely(g_conn);
}
PQclear(res);
/* 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 oid, typowner,typname, typlen, typprtlen, "
"typinput, typoutput, typreceive, typsend, typelem, typdelim, "
"typdefault, typrelid,typbyval from pg_type");
res = PQexec(g_conn,query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr,"getTypes(): SELECT failed\n");
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");
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));
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);
res = PQexec(g_conn,"end");
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[MAXQUERYLEN];
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;
/* find all operators, including builtin operators,
filter out system-defined operators at dump-out time */
res = PQexec(g_conn, "begin");
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr,"BEGIN command failed\n");
exit_nicely(g_conn);
}
PQclear(res);
sprintf(query, "SELECT oid, oprname, oprkind, oprcode, oprleft, "
"oprright, oprcom, oprnegate, oprrest, oprjoin, oprcanhash, "
"oprlsortop, oprrsortop from pg_operator");
res = PQexec(g_conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr,"getOperators(): SELECT failed\n");
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");
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));
}
PQclear(res);
res = PQexec(g_conn, "end");
PQclear(res);
return oprinfo;
}
/*
* 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[MAXQUERYLEN];
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;
/* find all user-defined aggregates */
res = PQexec(g_conn, "begin");
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr,"BEGIN command failed\n");
exit_nicely(g_conn);
}
PQclear(res);
sprintf(query,
"SELECT oid, aggname, aggtransfn1, aggtransfn2, aggfinalfn, "
"aggtranstype1, aggbasetype, aggtranstype2, agginitval1, "
"agginitval2 from pg_aggregate;");
res = PQexec(g_conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr,"getAggregates(): SELECT failed\n");
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");
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));
}
PQclear(res);
res = PQexec(g_conn, "end");
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[MAXQUERYLEN];
FuncInfo *finfo;
int i_oid;
int i_proname;
int i_proowner;
int i_prolang;
int i_pronargs;
int i_proargtypes;
int i_prorettype;
int i_proretset;
int i_prosrc;
int i_probin;
/* find all user-defined funcs */
res = PQexec(g_conn, "begin");
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr,"BEGIN command failed\n");
exit_nicely(g_conn);
}
PQclear(res);
sprintf(query,
"SELECT oid, proname, proowner, prolang, pronargs, prorettype, "
"proretset, proargtypes, prosrc, probin from pg_proc "
"where oid > '%d'::oid",
g_last_builtin_oid);
res = PQexec(g_conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr,"getFuncs(): SELECT failed\n");
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_proowner = PQfnumber(res,"proowner");
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");
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].proowner = strdup(PQgetvalue(res,i,i_proowner));
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)) == C_PROLANG_OID);
parseArgTypes(finfo[i].argtypes, PQgetvalue(res,i,i_proargtypes));
finfo[i].dumped = 0;
}
PQclear(res);
res = PQexec(g_conn, "end");
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)
{
PGresult *res;
int ntups;
int i;
char query[MAXQUERYLEN];
TableInfo *tblinfo;
int i_oid;
int i_relname;
int i_relarch;
/* 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 start with Xinv */
res = PQexec(g_conn, "begin");
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr,"BEGIN command failed\n");
exit_nicely(g_conn);
}
PQclear(res);
sprintf(query,
"SELECT oid, relname, relarch from pg_class "
"where relkind = 'r' and relname !~ '^pg_' "
"and relname !~ '^Xinv' order by oid;");
res = PQexec(g_conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr,"getTables(): SELECT failed\n");
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_relarch = PQfnumber(res,"relarch");
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].relarch = strdup(PQgetvalue(res,i,i_relarch));
}
PQclear(res);
res = PQexec(g_conn, "end");
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[MAXQUERYLEN];
InhInfo *inhinfo;
int i_inhrel;
int i_inhparent;
/* find all the inheritance information */
res = PQexec(g_conn, "begin");
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr,"BEGIN command failed\n");
exit_nicely(g_conn);
}
PQclear(res);
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\n");
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);
res = PQexec(g_conn, "end");
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[MAXQUERYLEN];
int i_attname;
int i_typname;
int i_attlen;
PGresult *res;
int ntups;
for (i=0;i<numTables;i++) {
/* skip archive tables */
if (isArchiveName(tblinfo[i].relname))
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.attlen "
"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\n");
exit_nicely(g_conn);
}
ntups = PQntuples(res);
i_attname = PQfnumber(res,"attname");
i_typname = PQfnumber(res,"typname");
i_attlen = PQfnumber(res,"attlen");
tblinfo[i].numatts = ntups;
tblinfo[i].attnames = (char**) malloc( ntups * sizeof(char*));
tblinfo[i].typnames = (char**) malloc( ntups * sizeof(char*));
tblinfo[i].attlen = (int*) malloc(ntups * sizeof(int));
tblinfo[i].inhAttrs = (int*) malloc (ntups * sizeof(int));
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].attlen[j] = atoi(PQgetvalue(res,j,i_attlen));
if (tblinfo[i].attlen[j] > 0)
tblinfo[i].attlen[j] = tblinfo[i].attlen[j] - 4;
tblinfo[i].inhAttrs[j] = 0; /* this flag is set in flagInhAttrs()*/
}
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[MAXQUERYLEN];
PGresult *res;
int ntups;
IndInfo *indinfo;
int i_indexrelname;
int i_indrelname;
int i_indamname;
int i_indproc;
int i_indkey;
int i_indclassname;
int i_indisunique;
/* find all the user-defined indices.
We do not handle partial indices.
We also assume that only single key indices
skip 'Xinx*' - indices on inversion objects
this is a 5-way join !!
*/
res = PQexec(g_conn, "begin");
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK) {
fprintf(stderr,"BEGIN command failed\n");
exit_nicely(g_conn);
}
PQclear(res);
sprintf(query,
"SELECT t1.relname as indexrelname, t2.relname as indrelname, "
"i.indproc, i.indkey[0], o.opcname as indclassname, "
"a.amname as indamname, i.indisunique from pg_index i, pg_class t1, "
"pg_class t2, pg_opclass o, pg_am a "
"where t1.oid = i.indexrelid and t2.oid = i.indrelid "
"and o.oid = i.indclass[0] and t1.relam = a.oid and "
"i.indexrelid > '%d'::oid and t2.relname !~ '^pg_' "
"and t1.relname !~ '^Xinx' ;",
g_last_builtin_oid);
res = PQexec(g_conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK) {
fprintf(stderr,"getIndices(): SELECT failed\n");
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_indclassname = PQfnumber(res,"indclassname");
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));
indinfo[i].indkey = strdup(PQgetvalue(res,i,i_indkey));
indinfo[i].indclassname = strdup(PQgetvalue(res,i,i_indclassname));
indinfo[i].indisunique = strdup(PQgetvalue(res,i,i_indisunique));
}
PQclear(res);
res = PQexec(g_conn,"end");
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[MAXQUERYLEN];
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);
sprintf(q,
"CREATE TYPE %s "
"( internallength = %s, externallength = %s, input = %s, "
"output = %s, send = %s, receive = %s, default = '%s'",
tinfo[i].typname,
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);
}
}
/*
* 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
*
*/
void
dumpOneFunc(FILE* fout, FuncInfo* finfo, int i,
TypeInfo *tinfo, int numTypes)
{
char q[MAXQUERYLEN];
int j;
if (finfo[i].dumped)
return;
else
finfo[i].dumped = 1;
sprintf(q,"CREATE FUNCTION %s (",finfo[i].proname);
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) ? "," : "",
typname);
}
sprintf(q,"%s ) RETURNS %s%s AS '%s' LANGUAGE '%s';\n",
q,
finfo[i].retset ? " SETOF " : "",
findTypeByOid(tinfo, numTypes, finfo[i].prorettype),
(finfo[i].lang) ? finfo[i].probin : finfo[i].prosrc,
(finfo[i].lang) ? "C" : "SQL");
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[MAXQUERYLEN];
char leftarg[MAXQUERYLEN];
char rightarg[MAXQUERYLEN];
char commutator[MAXQUERYLEN];
char negator[MAXQUERYLEN];
char restrict[MAXQUERYLEN];
char join[MAXQUERYLEN];
char sortop[MAXQUERYLEN];
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, ", LEFTARG = %s ",
findTypeByOid(tinfo, numTypes, oprinfo[i].oprleft));
}
if (strcmp(oprinfo[i].oprkind, "l") == 0 ||
strcmp(oprinfo[i].oprkind, "b") == 0 ) {
sprintf(rightarg, ", RIGHTARG = %s ",
findTypeByOid(tinfo, numTypes, oprinfo[i].oprright));
}
if (strcmp(oprinfo[i].oprcom, "0") == 0)
commutator[0] = '\0';
else
sprintf(commutator,", COMMUTATOR = %s ",
findOprByOid(oprinfo, numOperators, oprinfo[i].oprcom));
if (strcmp(oprinfo[i].oprnegate, "0") == 0)
negator[0] = '\0';
else
sprintf(negator,", NEGATOR = %s ",
findOprByOid(oprinfo, numOperators, oprinfo[i].oprnegate));
if (strcmp(oprinfo[i].oprrest, "-") == 0)
restrict[0] = '\0';
else
sprintf(restrict,", RESTRICT = %s ", oprinfo[i].oprrest);
if (strcmp(oprinfo[i].oprjoin,"-") == 0)
join[0] = '\0';
else
sprintf(join,", JOIN = %s ", oprinfo[i].oprjoin);
if (strcmp(oprinfo[i].oprlsortop, "0") == 0)
sortop[0] = '\0';
else
{
sprintf(sortop,", SORT = %s ",
findOprByOid(oprinfo, numOperators,
oprinfo[i].oprlsortop));
if (strcmp(oprinfo[i].oprrsortop, "0") != 0)
sprintf(sortop, "%s , %s", sortop,
findOprByOid(oprinfo, numOperators,
oprinfo[i].oprlsortop));
}
sprintf(q,
"CREATE OPERATOR %s "
"(PROCEDURE = %s %s %s %s %s %s %s %s %s);\n ",
oprinfo[i].oprname,
oprinfo[i].oprcode,
leftarg,
rightarg,
commutator,
negator,
restrict,
(strcmp(oprinfo[i].oprcanhash, "t")) ? ", HASHES" : "",
join,
sortop);
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[MAXQUERYLEN];
char sfunc1[MAXQUERYLEN];
char sfunc2[MAXQUERYLEN];
char finalfunc[MAXQUERYLEN];
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;
if ( strcmp(agginfo[i].aggtransfn1, "-") == 0)
sfunc1[0] = '\0';
else {
sprintf(sfunc1,
"SFUNC1 = %s, BASETYPE = %s, STYPE1 = %s",
agginfo[i].aggtransfn1,
findTypeByOid(tinfo,numTypes,agginfo[i].aggbasetype),
findTypeByOid(tinfo,numTypes,agginfo[i].aggtranstype1));
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,
findTypeByOid(tinfo,numTypes,agginfo[i].aggtranstype2));
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';
sprintf(q,"CREATE AGGREGATE %s ( %s %s %s %s %s );\n",
agginfo[i].aggname,
sfunc1,
comma1,
sfunc2,
comma2,
finalfunc);
fputs(q,fout);
}
}
/*
* 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)
{
int i,j,k;
char q[MAXQUERYLEN];
char **parentRels; /* list of names of parent relations */
int numParents;
int actual_atts; /* number of attrs in this CREATE statment */
const char *archiveMode;
for (i=0;i<numTables;i++) {
if (!tablename || (!strcmp(tblinfo[i].relname,tablename))) {
/* Skip VIEW relations */
if (isViewRule(tblinfo[i].relname))
continue;
/* skip archive names*/
if (isArchiveName(tblinfo[i].relname))
continue;
parentRels = tblinfo[i].parentRels;
numParents = tblinfo[i].numParents;
sprintf(q, "CREATE TABLE %s (", tblinfo[i].relname);
actual_atts = 0;
for (j=0;j<tblinfo[i].numatts;j++) {
if (tblinfo[i].inhAttrs[j] == 0) {
/* Show lengths on bpchar and varchar */
if (!strcmp(tblinfo[i].typnames[j],"bpchar")) {
sprintf(q, "%s%s%s char",
q,
(actual_atts > 0) ? ", " : "",
tblinfo[i].attnames[j]);
/* stored length can be -1 (variable) */
if (tblinfo[i].attlen[j] > 0)
sprintf(q, "%s(%d)",
q,
tblinfo[i].attlen[j]);
actual_atts++;
}
else if (!strcmp(tblinfo[i].typnames[j],"varchar")) {
sprintf(q, "%s%s%s %s",
q,
(actual_atts > 0) ? ", " : "",
tblinfo[i].attnames[j],
tblinfo[i].typnames[j]);
/* stored length can be -1 (variable) */
if (tblinfo[i].attlen[j] > 0)
sprintf(q, "%s(%d)",
q,
tblinfo[i].attlen[j]);
actual_atts++;
}
else {
sprintf(q, "%s%s%s %s",
q,
(actual_atts > 0) ? ", " : "",
tblinfo[i].attnames[j],
tblinfo[i].typnames[j]);
actual_atts++;
}
}
}
strcat(q,")");
if (numParents > 0) {
sprintf(q, "%s inherits ( ",q);
for (k=0;k<numParents;k++){
sprintf(q, "%s%s%s",
q,
(k>0) ? ", " : "",
parentRels[k]);
}
strcat(q,")");
}
switch(tblinfo[i].relarch[0]) {
case 'n':
archiveMode = "none";
break;
case 'h':
archiveMode = "heavy";
break;
case 'l':
archiveMode = "light";
break;
default:
fprintf(stderr, "unknown archive mode\n");
archiveMode = "none";
break;
}
sprintf(q, "%s archive = %s;\n",
q,
archiveMode);
fputs(q,fout);
}
}
}
/*
* 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;
int tableInd;
const char *attname; /* the name of the indexed attribute */
char *funcname; /* the name of the function to comput the index key from*/
int indkey;
char q[MAXQUERYLEN];
PGresult *res;
for (i=0;i<numIndices;i++) {
tableInd = findTableByName(tblinfo, numTables,
indinfo[i].indrelname);
indkey = atoi(indinfo[i].indkey) - 1;
if (indkey == ObjectIdAttributeNumber - 1)
attname = "oid";
else
attname = tblinfo[tableInd].attnames[indkey];
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);
funcname = strdup(PQgetvalue(res, 0,
PQfnumber(res,"proname")));
PQclear(res);
}
if (!tablename || (!strcmp(indinfo[i].indrelname,tablename))) {
sprintf(q,"CREATE %s INDEX %s on %s using %s (",
(strcmp(indinfo[i].indisunique, "t") == 0) ? "UNIQUE" : "",
indinfo[i].indexrelname,
indinfo[i].indrelname,
indinfo[i].indamname);
if (funcname) {
sprintf(q, "%s %s(%s) %s);\n",
q,funcname, attname, indinfo[i].indclassname);
free(funcname);
} else
sprintf(q, "%s %s %s);\n",
q,attname,indinfo[i].indclassname);
fputs(q,fout);
}
}
}
/*
* 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 Postgres95.
*
* the attrmap passed in tells how to map the attributes copied in to the
* attributes copied out
*/
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);
}
}
/*
* setMaxOid -
* find the maximum oid and generate a COPY statement to set it
*/
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\n");
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\n");
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\n");
exit_nicely(g_conn);
}
PQclear(res);
if (g_verbose)
fprintf(stderr, "%s maximum system oid is %d %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
*/
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\n");
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
*/
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;
}