From 7cbe57c34dec4860243e6d0f81738cfbb6e5d069 Mon Sep 17 00:00:00 2001
From: Noah Misch
Date: Sun, 23 Mar 2014 02:16:34 -0400
Subject: Offer triggers on foreign tables.

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.
---
 src/include/commands/trigger.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'src/include')

diff --git a/src/include/commands/trigger.h b/src/include/commands/trigger.h
index 18cb128ed4..d0b0356ba6 100644
--- a/src/include/commands/trigger.h
+++ b/src/include/commands/trigger.h
@@ -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,
-- 
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