pg_dump support for function parameter names.

src/bin/pg_dump/dumputils.c

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.c,v 1.10 2003/11/29 19:52:05 pgsql Exp $
+ * $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.c,v 1.11 2004/01/07 00:44:21 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -21,7 +21,6 @@
 
 #define supports_grant_options(version) ((version) >= 70400)
 
-static bool parseAclArray(const char *acls, char ***itemarray, int *nitems);
 static bool parseAclItem(const char *item, const char *type, const char *name,
 			 int remoteVersion,
 			 PQExpBuffer grantee, PQExpBuffer grantor,
@@ -166,6 +165,91 @@ parse_version(const char *versionString)
 }
 
 
+/*
+ * Deconstruct the text representation of a 1-dimensional Postgres array
+ * into individual items.
+ *
+ * On success, returns true and sets *itemarray and *nitems to describe
+ * an array of individual strings.	On parse failure, returns false;
+ * *itemarray may exist or be NULL.
+ *
+ * NOTE: free'ing itemarray is sufficient to deallocate the working storage.
+ */
+bool
+parsePGArray(const char *atext, char ***itemarray, int *nitems)
+{
+	int			inputlen;
+	char	  **items;
+	char	   *strings;
+	int			curitem;
+
+	/*
+	 * We expect input in the form of "{item,item,item}" where any item is
+	 * either raw data, or surrounded by double quotes (in which case
+	 * embedded characters including backslashes and quotes are
+	 * backslashed).
+	 *
+	 * We build the result as an array of pointers followed by the actual
+	 * string data, all in one malloc block for convenience of
+	 * deallocation. The worst-case storage need is not more than one
+	 * pointer and one character for each input character (consider
+	 * "{,,,,,,,,,,}").
+	 */
+	*itemarray = NULL;
+	*nitems = 0;
+	inputlen = strlen(atext);
+	if (inputlen < 2 || atext[0] != '{' || atext[inputlen - 1] != '}')
+		return false;			/* bad input */
+	items = (char **) malloc(inputlen * (sizeof(char *) + sizeof(char)));
+	if (items == NULL)
+		return false;			/* out of memory */
+	*itemarray = items;
+	strings = (char *) (items + inputlen);
+
+	atext++;					/* advance over initial '{' */
+	curitem = 0;
+	while (*atext != '}')
+	{
+		if (*atext == '\0')
+			return false;		/* premature end of string */
+		items[curitem] = strings;
+		while (*atext != '}' && *atext != ',')
+		{
+			if (*atext == '\0')
+				return false;	/* premature end of string */
+			if (*atext != '"')
+				*strings++ = *atext++;	/* copy unquoted data */
+			else
+			{
+				/* process quoted substring */
+				atext++;
+				while (*atext != '"')
+				{
+					if (*atext == '\0')
+						return false;	/* premature end of string */
+					if (*atext == '\\')
+					{
+						atext++;
+						if (*atext == '\0')
+							return false;		/* premature end of string */
+					}
+					*strings++ = *atext++;		/* copy quoted data */
+				}
+				atext++;
+			}
+		}
+		*strings++ = '\0';
+		if (*atext == ',')
+			atext++;
+		curitem++;
+	}
+	if (atext[1] != '\0')
+		return false;			/* bogus syntax (embedded '}') */
+	*nitems = curitem;
+	return true;
+}
+
+
 /*
  * Build GRANT/REVOKE command(s) for an object.
  *
@@ -202,7 +286,7 @@ buildACLCommands(const char *name, const char *type,
 	if (strlen(acls) == 0)
 		return true;			/* object has default permissions */
 
-	if (!parseAclArray(acls, &aclitems, &naclitems))
+	if (!parsePGArray(acls, &aclitems, &naclitems))
 	{
 		if (aclitems)
 			free(aclitems);
@@ -341,90 +425,6 @@ buildACLCommands(const char *name, const char *type,
 	return true;
 }
 
-/*
- * Deconstruct an ACL array (or actually any 1-dimensional Postgres array)
- * into individual items.
- *
- * On success, returns true and sets *itemarray and *nitems to describe
- * an array of individual strings.	On parse failure, returns false;
- * *itemarray may exist or be NULL.
- *
- * NOTE: free'ing itemarray is sufficient to deallocate the working storage.
- */
-static bool
-parseAclArray(const char *acls, char ***itemarray, int *nitems)
-{
-	int			inputlen;
-	char	  **items;
-	char	   *strings;
-	int			curitem;
-
-	/*
-	 * We expect input in the form of "{item,item,item}" where any item is
-	 * either raw data, or surrounded by double quotes (in which case
-	 * embedded characters including backslashes and quotes are
-	 * backslashed).
-	 *
-	 * We build the result as an array of pointers followed by the actual
-	 * string data, all in one malloc block for convenience of
-	 * deallocation. The worst-case storage need is not more than one
-	 * pointer and one character for each input character (consider
-	 * "{,,,,,,,,,,}").
-	 */
-	*itemarray = NULL;
-	*nitems = 0;
-	inputlen = strlen(acls);
-	if (inputlen < 2 || acls[0] != '{' || acls[inputlen - 1] != '}')
-		return false;			/* bad input */
-	items = (char **) malloc(inputlen * (sizeof(char *) + sizeof(char)));
-	if (items == NULL)
-		return false;			/* out of memory */
-	*itemarray = items;
-	strings = (char *) (items + inputlen);
-
-	acls++;						/* advance over initial '{' */
-	curitem = 0;
-	while (*acls != '}')
-	{
-		if (*acls == '\0')
-			return false;		/* premature end of string */
-		items[curitem] = strings;
-		while (*acls != '}' && *acls != ',')
-		{
-			if (*acls == '\0')
-				return false;	/* premature end of string */
-			if (*acls != '"')
-				*strings++ = *acls++;	/* copy unquoted data */
-			else
-			{
-				/* process quoted substring */
-				acls++;
-				while (*acls != '"')
-				{
-					if (*acls == '\0')
-						return false;	/* premature end of string */
-					if (*acls == '\\')
-					{
-						acls++;
-						if (*acls == '\0')
-							return false;		/* premature end of string */
-					}
-					*strings++ = *acls++;		/* copy quoted data */
-				}
-				acls++;
-			}
-		}
-		*strings++ = '\0';
-		if (*acls == ',')
-			acls++;
-		curitem++;
-	}
-	if (acls[1] != '\0')
-		return false;			/* bogus syntax (embedded '}') */
-	*nitems = curitem;
-	return true;
-}
-
 /*
  * This will parse an aclitem string, having the general form
  *		username=privilegecodes/grantor

src/bin/pg_dump/dumputils.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.h,v 1.9 2003/11/29 22:40:46 pgsql Exp $
+ * $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.h,v 1.10 2004/01/07 00:44:21 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -22,6 +22,7 @@ extern const char *fmtId(const char *identifier);
 extern void appendStringLiteral(PQExpBuffer buf, const char *str,
 					bool escapeAll);
 extern int	parse_version(const char *versionString);
+extern bool parsePGArray(const char *atext, char ***itemarray, int *nitems);
 extern bool buildACLCommands(const char *name, const char *type,
 				 const char *acls, const char *owner,
 				 int remoteVersion,

src/bin/pg_dump/pg_dump.c

@@ -12,7 +12,7 @@
  *	by PostgreSQL
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.c,v 1.361 2003/12/19 14:21:56 petere Exp $
+ *	  $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.c,v 1.362 2004/01/07 00:44:21 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -135,7 +135,8 @@ static void dumpACL(Archive *fout, CatalogId objCatId, DumpId objDumpId,
 static void getDependencies(void);
 static void getDomainConstraints(TypeInfo *tinfo);
 static void getTableData(TableInfo *tblinfo, int numTables, bool oids);
-static char *format_function_signature(FuncInfo *finfo, bool honor_quotes);
+static char *format_function_signature(FuncInfo *finfo, char **argnames,
+									   bool honor_quotes);
 static const char *convertRegProcReference(const char *proc);
 static const char *convertOperatorReference(const char *opr);
 static Oid	findLastBuiltinOid_V71(const char *);
@@ -4650,9 +4651,12 @@ dumpProcLang(Archive *fout, ProcLangInfo *plang)
  *
  * The argument type names are qualified if needed.  The function name
  * is never qualified.
+ *
+ * argnames may be NULL if no names are available.
  */
 static char *
-format_function_signature(FuncInfo *finfo, bool honor_quotes)
+format_function_signature(FuncInfo *finfo, char **argnames,
+						  bool honor_quotes)
 {
 	PQExpBufferData fn;
 	int			j;
@@ -4665,10 +4669,18 @@ format_function_signature(FuncInfo *finfo, bool honor_quotes)
 	for (j = 0; j < finfo->nargs; j++)
 	{
 		char	   *typname;
+		char	   *argname;
 
 		typname = getFormattedTypeName(finfo->argtypes[j], zeroAsOpaque);
-		appendPQExpBuffer(&fn, "%s%s",
+
+		argname = argnames ? argnames[j] : (char *) NULL;
+		if (argname && argname[0] == '\0')
+			argname = NULL;
+
+		appendPQExpBuffer(&fn, "%s%s%s%s",
 						  (j > 0) ? ", " : "",
+						  argname ? fmtId(argname) : "",
+						  argname ? " " : "",
 						  typname);
 		free(typname);
 	}
@@ -4695,11 +4707,13 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
 	char	   *proretset;
 	char	   *prosrc;
 	char	   *probin;
+	char	   *proargnames;
 	char	   *provolatile;
 	char	   *proisstrict;
 	char	   *prosecdef;
 	char	   *lanname;
 	char	   *rettypename;
+	char	  **argnamearray = NULL;
 
 	/* Dump only funcs in dumpable namespaces */
 	if (!finfo->pronamespace->dump || dataOnly)
@@ -4714,10 +4728,22 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
 	selectSourceSchema(finfo->pronamespace->nspname);
 
 	/* Fetch function-specific details */
-	if (g_fout->remoteVersion >= 70300)
+	if (g_fout->remoteVersion >= 70500)
+	{
+		appendPQExpBuffer(query,
+						  "SELECT proretset, prosrc, probin, "
+						  "proargnames, "
+						  "provolatile, proisstrict, prosecdef, "
+						  "(SELECT lanname FROM pg_catalog.pg_language WHERE oid = prolang) as lanname "
+						  "FROM pg_catalog.pg_proc "
+						  "WHERE oid = '%u'::pg_catalog.oid",
+						  finfo->dobj.catId.oid);
+	}
+	else if (g_fout->remoteVersion >= 70300)
 	{
 		appendPQExpBuffer(query,
 						  "SELECT proretset, prosrc, probin, "
+						  "null::text as proargnames, "
 						  "provolatile, proisstrict, prosecdef, "
 						  "(SELECT lanname FROM pg_catalog.pg_language WHERE oid = prolang) as lanname "
 						  "FROM pg_catalog.pg_proc "
@@ -4728,6 +4754,7 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
 	{
 		appendPQExpBuffer(query,
 						  "SELECT proretset, prosrc, probin, "
+						  "null::text as proargnames, "
 		 "case when proiscachable then 'i' else 'v' end as provolatile, "
 						  "proisstrict, "
 						  "'f'::boolean as prosecdef, "
@@ -4740,6 +4767,7 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
 	{
 		appendPQExpBuffer(query,
 						  "SELECT proretset, prosrc, probin, "
+						  "null::text as proargnames, "
 		 "case when proiscachable then 'i' else 'v' end as provolatile, "
 						  "'f'::boolean as proisstrict, "
 						  "'f'::boolean as prosecdef, "
@@ -4764,6 +4792,7 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
 	proretset = PQgetvalue(res, 0, PQfnumber(res, "proretset"));
 	prosrc = PQgetvalue(res, 0, PQfnumber(res, "prosrc"));
 	probin = PQgetvalue(res, 0, PQfnumber(res, "probin"));
+	proargnames = PQgetvalue(res, 0, PQfnumber(res, "proargnames"));
 	provolatile = PQgetvalue(res, 0, PQfnumber(res, "provolatile"));
 	proisstrict = PQgetvalue(res, 0, PQfnumber(res, "proisstrict"));
 	prosecdef = PQgetvalue(res, 0, PQfnumber(res, "prosecdef"));
@@ -4792,8 +4821,22 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
 		}
 	}
 
-	funcsig = format_function_signature(finfo, true);
-	funcsig_tag = format_function_signature(finfo, false);
+	if (proargnames && *proargnames)
+	{
+		int		nitems = 0;
+
+		if (!parsePGArray(proargnames, &argnamearray, &nitems) ||
+			nitems != finfo->nargs)
+		{
+			write_msg(NULL, "WARNING: could not parse proargnames array\n");
+			if (argnamearray)
+				free(argnamearray);
+			argnamearray = NULL;
+		}
+	}
+
+	funcsig = format_function_signature(finfo, argnamearray, true);
+	funcsig_tag = format_function_signature(finfo, NULL, false);
 
 	/*
 	 * DROP must be fully qualified in case same name appears in
@@ -4864,6 +4907,8 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
 	destroyPQExpBuffer(asPart);
 	free(funcsig);
 	free(funcsig_tag);
+	if (argnamearray)
+		free(argnamearray);
 }
 
 
@@ -4953,7 +4998,7 @@ dumpCast(Archive *fout, CastInfo *cast)
 		appendPQExpBuffer(defqry, "WITHOUT FUNCTION");
 	else
 		appendPQExpBuffer(defqry, "WITH FUNCTION %s",
-						  format_function_signature(funcInfo, true));
+						  format_function_signature(funcInfo, NULL, true));
 
 	if (cast->castcontext == 'a')
 		appendPQExpBuffer(defqry, " AS ASSIGNMENT");
@@ -5892,8 +5937,8 @@ dumpAgg(Archive *fout, AggInfo *agginfo)
 	free(aggsig);
 	free(aggsig_tag);
 
-	aggsig = format_function_signature(&agginfo->aggfn, true);
-	aggsig_tag = format_function_signature(&agginfo->aggfn, false);
+	aggsig = format_function_signature(&agginfo->aggfn, NULL, true);
+	aggsig_tag = format_function_signature(&agginfo->aggfn, NULL, false);
 
 	dumpACL(fout, agginfo->aggfn.dobj.catId, agginfo->aggfn.dobj.dumpId,
 			"FUNCTION",