diff options
Diffstat (limited to 'src/backend/executor/spi.c')
| -rw-r--r-- | src/backend/executor/spi.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/backend/executor/spi.c b/src/backend/executor/spi.c index 875e4da2914..6d59401d0fb 100644 --- a/src/backend/executor/spi.c +++ b/src/backend/executor/spi.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.181 2007/09/20 17:56:31 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.182 2007/10/24 23:27:08 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -975,6 +975,7 @@ SPI_cursor_open(const char *name, SPIPlanPtr plan, { if (list_length(stmt_list) == 1 && IsA((Node *) linitial(stmt_list), PlannedStmt) && + ((PlannedStmt *) linitial(stmt_list))->rowMarks == NIL && ExecSupportsBackwardScan(((PlannedStmt *) linitial(stmt_list))->planTree)) portal->cursorOptions |= CURSOR_OPT_SCROLL; else @@ -982,6 +983,22 @@ SPI_cursor_open(const char *name, SPIPlanPtr plan, } /* + * Disallow SCROLL with SELECT FOR UPDATE. This is not redundant with + * the check in transformDeclareCursorStmt because the cursor options + * might not have come through there. + */ + if (portal->cursorOptions & CURSOR_OPT_SCROLL) + { + if (list_length(stmt_list) == 1 && + IsA((Node *) linitial(stmt_list), PlannedStmt) && + ((PlannedStmt *) linitial(stmt_list))->rowMarks != NIL) + ereport(ERROR, + (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), + errmsg("DECLARE CURSOR SCROLL ... FOR UPDATE/SHARE is not supported"), + errdetail("Scrollable cursors must be READ ONLY."))); + } + + /* * If told to be read-only, we'd better check for read-only queries. * This can't be done earlier because we need to look at the finished, * planned queries. (In particular, we don't want to do it between |