#include "nodes/nodeFuncs.h"
#include "optimizer/optimizer.h"
#include "rewrite/rewriteHandler.h"
+#include "rewrite/rewriteManip.h"
#include "storage/bufmgr.h"
#include "storage/lmgr.h"
#include "utils/builtins.h"
switch (action->commandType)
{
case CMD_INSERT:
+ /* INSERT actions always use rootRelInfo */
ExecCheckPlanOutput(rootRelInfo->ri_RelationDesc,
action->targetList);
}
else
{
- /* not partitioned? use the stock relation and slot */
- tgtslot = resultRelInfo->ri_newTupleSlot;
- tgtdesc = RelationGetDescr(resultRelInfo->ri_RelationDesc);
+ /*
+ * If the MERGE targets an inherited table, we insert
+ * into the root table, so we must initialize its
+ * "new" tuple slot, if not already done, and use its
+ * relation descriptor for the projection.
+ *
+ * For non-inherited tables, rootRelInfo and
+ * resultRelInfo are the same, and the "new" tuple
+ * slot will already have been initialized.
+ */
+ if (rootRelInfo->ri_newTupleSlot == NULL)
+ rootRelInfo->ri_newTupleSlot =
+ table_slot_create(rootRelInfo->ri_RelationDesc,
+ &estate->es_tupleTable);
+
+ tgtslot = rootRelInfo->ri_newTupleSlot;
+ tgtdesc = RelationGetDescr(rootRelInfo->ri_RelationDesc);
}
action_state->mas_proj =
}
}
}
+
+ /*
+ * If the MERGE targets an inherited table, any INSERT actions will use
+ * rootRelInfo, and rootRelInfo will not be in the resultRelInfo array.
+ * Therefore we must initialize its WITH CHECK OPTION constraints, as
+ * ExecInitModifyTable did for the resultRelInfo entries, but there should
+ * be nothing to do for RETURNING, since MERGE does not support RETURNING.
+ *
+ * Note that the planner does not build a withCheckOptionList for the root
+ * relation, but as in ExecInitPartitionInfo, we can use the first
+ * resultRelInfo entry as a reference to calculate the attno's for the
+ * root table.
+ */
+ if (rootRelInfo != mtstate->resultRelInfo &&
+ rootRelInfo->ri_RelationDesc->rd_rel->relkind != RELKIND_PARTITIONED_TABLE &&
+ (mtstate->mt_merge_subcommands & MERGE_INSERT) != 0)
+ {
+ Relation rootRelation = rootRelInfo->ri_RelationDesc;
+ Relation firstResultRel = mtstate->resultRelInfo[0].ri_RelationDesc;
+
+ if (node->withCheckOptionLists != NIL)
+ {
+ List *wcoList;
+ List *wcoExprs = NIL;
+
+ /* There should be as many WCO lists as result rels */
+ Assert(list_length(node->withCheckOptionLists) ==
+ list_length(node->resultRelations));
+
+ /*
+ * Use the first WCO list as a reference. In the most common case,
+ * this will be for the same relation as rootRelInfo, and so there
+ * will be no need to adjust its attno's.
+ */
+ wcoList = linitial(node->withCheckOptionLists);
+ if (rootRelation != firstResultRel)
+ {
+ int firstVarno = mtstate->resultRelInfo[0].ri_RangeTableIndex;
+ AttrMap *part_attmap;
+ bool found_whole_row;
+
+ /* Convert any Vars in it to contain the root's attno's */
+ part_attmap =
+ build_attrmap_by_name(RelationGetDescr(rootRelation),
+ RelationGetDescr(firstResultRel));
+
+ wcoList = (List *)
+ map_variable_attnos((Node *) wcoList,
+ firstVarno, 0,
+ part_attmap,
+ RelationGetForm(rootRelation)->reltype,
+ &found_whole_row);
+ }
+
+ foreach(lc, wcoList)
+ {
+ WithCheckOption *wco = lfirst_node(WithCheckOption, lc);
+ ExprState *wcoExpr = ExecInitQual(castNode(List, wco->qual),
+ &mtstate->ps);
+
+ wcoExprs = lappend(wcoExprs, wcoExpr);
+ }
+
+ rootRelInfo->ri_WithCheckOptions = wcoList;
+ rootRelInfo->ri_WithCheckOptionExprs = wcoExprs;
+ }
+
+ /* MERGE does not support RETURNING */
+ Assert(node->returningLists == NIL);
+ }
}
/*
1 | 01-17-2007 | |
(2 rows)
+-- MERGE into inheritance root table
+DROP TRIGGER insert_measurement_trigger ON measurement;
+ALTER TABLE measurement ADD CONSTRAINT mcheck CHECK (city_id = 0) NO INHERIT;
+EXPLAIN (COSTS OFF)
+MERGE INTO measurement m
+ USING (VALUES (1, '01-17-2007'::date)) nm(city_id, logdate) ON
+ (m.city_id = nm.city_id and m.logdate=nm.logdate)
+WHEN NOT MATCHED THEN INSERT
+ (city_id, logdate, peaktemp, unitsales)
+ VALUES (city_id - 1, logdate, 25, 100);
+ QUERY PLAN
+--------------------------------------------------------------------------
+ Merge on measurement m
+ Merge on measurement_y2007m01 m_1
+ -> Nested Loop Left Join
+ -> Result
+ -> Seq Scan on measurement_y2007m01 m_1
+ Filter: ((city_id = 1) AND (logdate = '01-17-2007'::date))
+(6 rows)
+
+BEGIN;
+MERGE INTO measurement m
+ USING (VALUES (1, '01-17-2007'::date)) nm(city_id, logdate) ON
+ (m.city_id = nm.city_id and m.logdate=nm.logdate)
+WHEN NOT MATCHED THEN INSERT
+ (city_id, logdate, peaktemp, unitsales)
+ VALUES (city_id - 1, logdate, 25, 100);
+SELECT * FROM ONLY measurement ORDER BY city_id, logdate;
+ city_id | logdate | peaktemp | unitsales
+---------+------------+----------+-----------
+ 0 | 07-21-2005 | 25 | 35
+ 0 | 01-17-2007 | 25 | 100
+(2 rows)
+
+ROLLBACK;
+ALTER TABLE measurement ENABLE ROW LEVEL SECURITY;
+ALTER TABLE measurement FORCE ROW LEVEL SECURITY;
+CREATE POLICY measurement_p ON measurement USING (peaktemp IS NOT NULL);
+MERGE INTO measurement m
+ USING (VALUES (1, '01-17-2007'::date)) nm(city_id, logdate) ON
+ (m.city_id = nm.city_id and m.logdate=nm.logdate)
+WHEN NOT MATCHED THEN INSERT
+ (city_id, logdate, peaktemp, unitsales)
+ VALUES (city_id - 1, logdate, NULL, 100); -- should fail
+ERROR: new row violates row-level security policy for table "measurement"
+MERGE INTO measurement m
+ USING (VALUES (1, '01-17-2007'::date)) nm(city_id, logdate) ON
+ (m.city_id = nm.city_id and m.logdate=nm.logdate)
+WHEN NOT MATCHED THEN INSERT
+ (city_id, logdate, peaktemp, unitsales)
+ VALUES (city_id - 1, logdate, 25, 100); -- ok
+SELECT * FROM ONLY measurement ORDER BY city_id, logdate;
+ city_id | logdate | peaktemp | unitsales
+---------+------------+----------+-----------
+ 0 | 07-21-2005 | 25 | 35
+ 0 | 01-17-2007 | 25 | 100
+(2 rows)
+
DROP TABLE measurement, new_measurement CASCADE;
NOTICE: drop cascades to 3 other objects
DETAIL: drop cascades to table measurement_y2006m02
SELECT * FROM new_measurement ORDER BY city_id, logdate;
+-- MERGE into inheritance root table
+DROP TRIGGER insert_measurement_trigger ON measurement;
+ALTER TABLE measurement ADD CONSTRAINT mcheck CHECK (city_id = 0) NO INHERIT;
+
+EXPLAIN (COSTS OFF)
+MERGE INTO measurement m
+ USING (VALUES (1, '01-17-2007'::date)) nm(city_id, logdate) ON
+ (m.city_id = nm.city_id and m.logdate=nm.logdate)
+WHEN NOT MATCHED THEN INSERT
+ (city_id, logdate, peaktemp, unitsales)
+ VALUES (city_id - 1, logdate, 25, 100);
+
+BEGIN;
+MERGE INTO measurement m
+ USING (VALUES (1, '01-17-2007'::date)) nm(city_id, logdate) ON
+ (m.city_id = nm.city_id and m.logdate=nm.logdate)
+WHEN NOT MATCHED THEN INSERT
+ (city_id, logdate, peaktemp, unitsales)
+ VALUES (city_id - 1, logdate, 25, 100);
+SELECT * FROM ONLY measurement ORDER BY city_id, logdate;
+ROLLBACK;
+
+ALTER TABLE measurement ENABLE ROW LEVEL SECURITY;
+ALTER TABLE measurement FORCE ROW LEVEL SECURITY;
+CREATE POLICY measurement_p ON measurement USING (peaktemp IS NOT NULL);
+
+MERGE INTO measurement m
+ USING (VALUES (1, '01-17-2007'::date)) nm(city_id, logdate) ON
+ (m.city_id = nm.city_id and m.logdate=nm.logdate)
+WHEN NOT MATCHED THEN INSERT
+ (city_id, logdate, peaktemp, unitsales)
+ VALUES (city_id - 1, logdate, NULL, 100); -- should fail
+
+MERGE INTO measurement m
+ USING (VALUES (1, '01-17-2007'::date)) nm(city_id, logdate) ON
+ (m.city_id = nm.city_id and m.logdate=nm.logdate)
+WHEN NOT MATCHED THEN INSERT
+ (city_id, logdate, peaktemp, unitsales)
+ VALUES (city_id - 1, logdate, 25, 100); -- ok
+SELECT * FROM ONLY measurement ORDER BY city_id, logdate;
+
DROP TABLE measurement, new_measurement CASCADE;
DROP FUNCTION measurement_insert_trigger();
projects / thirdparty / postgresql.git / commitdiff
