From: Tom Lane Date: Thu, 26 Aug 2010 18:54:37 +0000 (+0000) Subject: Fix ExecMakeTableFunctionResult to verify that all rows returned by a SRF X-Git-Tag: REL9_1_ALPHA1~26 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=db2d9c602c97fe6dbcf32959fbc04fa3659e8599;p=postgresql Fix ExecMakeTableFunctionResult to verify that all rows returned by a SRF returning "record" actually do have the same rowtype. This is needed because the parser can't realistically enforce that they will all have the same typmod, as seen in a recent example from David Wheeler. Back-patch to 8.0, which is as far back as we have the notion of RECORD subtypes being distinguished by typmod. Wheeler's example depends on 8.4-and-up features, but I suspect there may be ways to provoke similar failures before 8.4. --- diff --git a/src/backend/executor/execQual.c b/src/backend/executor/execQual.c index e30689bba3..e88ae58d2b 100644 --- a/src/backend/executor/execQual.c +++ b/src/backend/executor/execQual.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.264 2010/07/12 17:01:05 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.265 2010/08/26 18:54:37 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -2143,6 +2143,16 @@ ExecMakeTableFunctionResult(ExprState *funcexpr, td = DatumGetHeapTupleHeader(result); + /* + * Verify all returned rows have same subtype; necessary in + * case the type is RECORD. + */ + if (HeapTupleHeaderGetTypeId(td) != tupdesc->tdtypeid || + HeapTupleHeaderGetTypMod(td) != tupdesc->tdtypmod) + ereport(ERROR, + (errcode(ERRCODE_DATATYPE_MISMATCH), + errmsg("rows returned by function are not all of the same row type"))); + /* * tuplestore_puttuple needs a HeapTuple not a bare * HeapTupleHeader, but it doesn't need all the fields.