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| author | Bruce Momjian <bruce@momjian.us> | 1997-12-27 06:41:41 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 1997-12-27 06:41:41 +0000 |
| commit | 4ce24c8aa98b26f0b070464ce118ef2a1901064e (patch) | |
| tree | 15deb75908b3d87a498e01d46adc371088702e25 /src/backend/executor/nodeAppend.c | |
| parent | 2730c4a45c0f2e0c47caba19d2fe52dedfc3a928 (diff) | |
| download | postgresql-4ce24c8aa98b26f0b070464ce118ef2a1901064e.tar.gz postgresql-4ce24c8aa98b26f0b070464ce118ef2a1901064e.zip | |
UNION work for UNION ALL and other union stuff.
Diffstat (limited to 'src/backend/executor/nodeAppend.c')
| -rw-r--r-- | src/backend/executor/nodeAppend.c | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/src/backend/executor/nodeAppend.c b/src/backend/executor/nodeAppend.c index 3c073101275..cdc0e56a1b7 100644 --- a/src/backend/executor/nodeAppend.c +++ b/src/backend/executor/nodeAppend.c @@ -7,7 +7,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/executor/nodeAppend.c,v 1.9 1997/09/08 21:43:10 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/executor/nodeAppend.c,v 1.10 1997/12/27 06:40:50 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -34,7 +34,7 @@ * nil nil ... ... ... * subplans * - * Append nodes are currently used to support inheritance + * Append nodes are currently used to unions, and to support inheritance * queries, where several relations need to be scanned. * For example, in our standard person/student/employee/student-emp * example, where student and employee inherit from person @@ -85,6 +85,7 @@ exec_append_initialize_next(Append *node) int whichplan; int nplans; + List *rts; List *rtentries; ResTarget *rtentry; @@ -101,6 +102,7 @@ exec_append_initialize_next(Append *node) whichplan = unionstate->as_whichplan; nplans = unionstate->as_nplans; + rts = node->unionrts; rtentries = node->unionrtentries; if (whichplan < 0) @@ -140,27 +142,28 @@ exec_append_initialize_next(Append *node) if (node->unionrelid > 0) { rtentry = nth(whichplan, rtentries); - if (rtentry == NULL) - elog(DEBUG, "exec_append_initialize_next: rtentry is nil"); + Assert(rtentry != NULL); unionrelid = node->unionrelid; rt_store(unionrelid, rangeTable, rtentry); - - if (unionstate->as_junkFilter_list) - { - estate->es_junkFilter = - (JunkFilter *) nth(whichplan, - unionstate->as_junkFilter_list); - } - if (unionstate->as_result_relation_info_list) - { - estate->es_result_relation_info = - (RelationInfo *) nth(whichplan, - unionstate->as_result_relation_info_list); - } - result_slot->ttc_whichplan = whichplan; } + else + estate->es_range_table = nth(whichplan, rts); + + if (unionstate->as_junkFilter_list) + { + estate->es_junkFilter = + (JunkFilter *) nth(whichplan, + unionstate->as_junkFilter_list); + } + if (unionstate->as_result_relation_info_list) + { + estate->es_result_relation_info = + (RelationInfo *) nth(whichplan, + unionstate->as_result_relation_info_list); + } + result_slot->ttc_whichplan = whichplan; return TRUE; } @@ -439,8 +442,7 @@ ExecProcAppend(Append *node) if (exec_append_initialize_next(node)) { ExecSetSlotDescriptorIsNew(result_slot, true); - return - ExecProcAppend(node); + return ExecProcAppend(node); } else return ExecClearTuple(result_slot); |