diff options
Diffstat (limited to 'contrib/tablefunc/tablefunc.c')
| -rw-r--r-- | contrib/tablefunc/tablefunc.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/contrib/tablefunc/tablefunc.c b/contrib/tablefunc/tablefunc.c index 02f02eab574..85986ec24ad 100644 --- a/contrib/tablefunc/tablefunc.c +++ b/contrib/tablefunc/tablefunc.c @@ -184,6 +184,8 @@ normal_rand(PG_FUNCTION_ARGS) /* stuff done only on the first call of the function */ if (SRF_IS_FIRSTCALL()) { + int32 num_tuples; + /* create a function context for cross-call persistence */ funcctx = SRF_FIRSTCALL_INIT(); @@ -193,7 +195,12 @@ normal_rand(PG_FUNCTION_ARGS) oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx); /* total number of tuples to be returned */ - funcctx->max_calls = PG_GETARG_UINT32(0); + num_tuples = PG_GETARG_INT32(0); + if (num_tuples < 0) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("number of rows cannot be negative"))); + funcctx->max_calls = num_tuples; /* allocate memory for user context */ fctx = (normal_rand_fctx *) palloc(sizeof(normal_rand_fctx)); |