Pass EXEC_FLAG_REWIND when initializing a tuplestore scan.

Since a rescan is possible, we must be able to rewind.

Thomas Munro, per a report from Prabhat Sabu

Discussion: http://postgr.es/m/CAEepm=2=Uv5fm=exqL+ygBxaO+-tgmC=o+63H4zYAXi9HtXf1w@mail.gmail.com

diff --git a/src/backend/executor/nodeNamedtuplestorescan.c b/src/backend/executor/nodeNamedtuplestorescan.c
index 917b05197a48582003a7a87cc78402017fcfe876..44e09426691583378962b82189172eedf196cbe6 100644 (file)
--- a/src/backend/executor/nodeNamedtuplestorescan.c
+++ b/src/backend/executor/nodeNamedtuplestorescan.c
@@ -107,7 +107,7 @@ ExecInitNamedTuplestoreScan(NamedTuplestoreScan *node, EState *estate, int eflag
        scanstate->relation = (Tuplestorestate *) enr->reldata;
        scanstate->tupdesc = ENRMetadataGetTupDesc(&(enr->md));
        scanstate->readptr =
-               tuplestore_alloc_read_pointer(scanstate->relation, 0);
+               tuplestore_alloc_read_pointer(scanstate->relation, EXEC_FLAG_REWIND);
 
        /*
         * The new read pointer copies its position from read pointer 0, which