diff options
Diffstat (limited to 'src/backend/commands/prepare.c')
| -rw-r--r-- | src/backend/commands/prepare.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/src/backend/commands/prepare.c b/src/backend/commands/prepare.c index c317494f6fa..6e16853fd78 100644 --- a/src/backend/commands/prepare.c +++ b/src/backend/commands/prepare.c @@ -10,7 +10,7 @@ * Copyright (c) 2002-2003, PostgreSQL Global Development Group * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/commands/prepare.c,v 1.16 2003/05/06 20:26:26 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/commands/prepare.c,v 1.17 2003/05/06 21:51:41 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -394,6 +394,34 @@ FetchPreparedStatementParams(const char *stmt_name) } /* + * Given a prepared statement, determine the result tupledesc it will + * produce. Returns NULL if the execution will not return tuples. + * + * Note: the result is created or copied into current memory context. + */ +TupleDesc +FetchPreparedStatementResultDesc(PreparedStatement *stmt) +{ + Query *query; + + switch (ChoosePortalStrategy(stmt->query_list)) + { + case PORTAL_ONE_SELECT: + query = (Query *) lfirst(stmt->query_list); + return ExecCleanTypeFromTL(query->targetList, false); + + case PORTAL_UTIL_SELECT: + query = (Query *) lfirst(stmt->query_list); + return UtilityTupleDescriptor(query->utilityStmt); + + case PORTAL_MULTI_QUERY: + /* will not return tuples */ + break; + } + return NULL; +} + +/* * Implements the 'DEALLOCATE' utility statement: deletes the * specified plan from storage. */ |