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Offer triggers on foreign tables.

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This covers all the SQL-standard trigger types supported for regular
tables; it does not cover constraint triggers.  The approach for
acquiring the old row mirrors that for view INSTEAD OF triggers.  For
AFTER ROW triggers, we spool the foreign tuples to a tuplestore.

This changes the FDW API contract; when deciding which columns to
populate in the slot returned from data modification callbacks, writable
FDWs will need to check for AFTER ROW triggers in addition to checking
for a RETURNING clause.

In support of the feature addition, refactor the TriggerFlags bits and
the assembly of old tuples in ModifyTable.

Ronan Dunklau, reviewed by KaiGai Kohei; some additional hacking by me.
This commit is contained in:
Noah Misch
2014-03-23 02:16:34 -04:00
parent 6115480c54
commit 7cbe57c34d
14 changed files with 1145 additions and 202 deletions
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8
src/include/commands/trigger.h
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@ -147,10 +147,12 @@ extern void ExecASDeleteTriggers(EState *estate,
extern bool ExecBRDeleteTriggers(EState *estate,
EPQState *epqstate,
ResultRelInfo *relinfo,
ItemPointer tupleid);
ItemPointer tupleid,
HeapTuple fdw_trigtuple);
extern void ExecARDeleteTriggers(EState *estate,
ResultRelInfo *relinfo,
ItemPointer tupleid);
ItemPointer tupleid,
HeapTuple fdw_trigtuple);
extern bool ExecIRDeleteTriggers(EState *estate,
ResultRelInfo *relinfo,
HeapTuple trigtuple);
@ -162,10 +164,12 @@ extern TupleTableSlot *ExecBRUpdateTriggers(EState *estate,
EPQState *epqstate,
ResultRelInfo *relinfo,
ItemPointer tupleid,
HeapTuple fdw_trigtuple,
TupleTableSlot *slot);
extern void ExecARUpdateTriggers(EState *estate,
ResultRelInfo *relinfo,
ItemPointer tupleid,
HeapTuple fdw_trigtuple,
HeapTuple newtuple,
List *recheckIndexes);
extern TupleTableSlot *ExecIRUpdateTriggers(EState *estate,