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Commite39af82

Browse files
committed
pathman:
* split partition function* PL functions enchancement
1 parentc36721e commite39af82

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3 files changed

+307
-234
lines changed

3 files changed

+307
-234
lines changed

‎contrib/pathman/pathman.c‎

Lines changed: 52 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -75,6 +75,7 @@ PG_FUNCTION_INFO_V1( on_partitions_created );
7575
PG_FUNCTION_INFO_V1(on_partitions_updated );
7676
PG_FUNCTION_INFO_V1(on_partitions_removed );
7777
PG_FUNCTION_INFO_V1(find_range_partition );
78+
PG_FUNCTION_INFO_V1(get_partition_range );
7879

7980

8081
/*
@@ -1162,3 +1163,54 @@ find_range_partition(PG_FUNCTION_ARGS)
11621163

11631164
PG_RETURN_NULL();
11641165
}
1166+
1167+
/*
1168+
* Returns range (min, max) as output parameters
1169+
*
1170+
* first argument is parent relid
1171+
* second is partition relid
1172+
* third and forth are MIN and MAX output parameters
1173+
*/
1174+
Datum
1175+
get_partition_range(PG_FUNCTION_ARGS)
1176+
{
1177+
intparent_oid=DatumGetInt32(PG_GETARG_DATUM(0));
1178+
intchild_oid=DatumGetInt32(PG_GETARG_DATUM(1));
1179+
intnelems=2;
1180+
Datum*elems=palloc(nelems*sizeof(Datum));
1181+
Oidelemtype=INT4OID;
1182+
PartRelationInfo*prel;
1183+
RangeRelation*rangerel;
1184+
RangeEntry*ranges;
1185+
boolfound;
1186+
inti;
1187+
1188+
prel= (PartRelationInfo*)
1189+
hash_search(relations, (constvoid*)&parent_oid,HASH_FIND,0);
1190+
1191+
rangerel= (RangeRelation*)
1192+
hash_search(range_restrictions, (constvoid*)&parent_oid,HASH_FIND,NULL);
1193+
1194+
if (!prel|| !rangerel)
1195+
PG_RETURN_NULL();
1196+
1197+
ranges=dsm_array_get_pointer(&rangerel->ranges);
1198+
for(i=0;i<rangerel->ranges.length;i++)
1199+
if (ranges[i].child_oid==child_oid)
1200+
{
1201+
found= true;
1202+
break;
1203+
}
1204+
1205+
if (found)
1206+
{
1207+
elems[0]=ranges[i].min;
1208+
elems[1]=ranges[i].max;
1209+
1210+
ArrayType*arr=
1211+
construct_array(elems,nelems,prel->atttype,sizeof(Oid), true,'i');
1212+
PG_RETURN_ARRAYTYPE_P(arr);
1213+
}
1214+
1215+
PG_RETURN_NULL();
1216+
}

‎contrib/pathman/sql/init.sql‎

Lines changed: 18 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -169,22 +169,32 @@ RETURNS VOID AS 'pathman', 'on_partitions_removed' LANGUAGE C STRICT;
169169
CREATE OR REPLACEFUNCTIONfind_range_partition(relidOID, value ANYELEMENT)
170170
RETURNSOIDAS'pathman','find_range_partition' LANGUAGE C STRICT;
171171

172+
/*
173+
* Returns min and max values for specified RANGE partition.
174+
*/
175+
CREATE OR REPLACEFUNCTIONget_partition_range(
176+
parent_relid ANYELEMENT,
177+
partition_relid ANYELEMENT)
178+
RETURNS ANYARRAYAS'pathman','get_partition_range' LANGUAGE C STRICT;
179+
180+
/*
181+
* Copy rows to partitions
182+
*/
172183
CREATE OR REPLACEFUNCTIONpartition_data(p_parenttext)
173184
RETURNSbigintAS
174185
$$
175186
DECLARE
176187
rec RECORD;
177188
BEGIN
178189
FOR recIN (SELECTchild.relname,pg_constraint.consrc
179-
FROM pg_pathman_rels
180-
JOIN pg_classAS parentONparent.relname=pg_pathman_rels.relname
181-
JOIN pg_inheritsON inhparent=parent.relfilenode
182-
JOIN pg_constraintON conrelid= inhrelidAND contype='c'
183-
JOIN pg_classAS childONchild.relfilenode= inhrelid
184-
WHEREpg_pathman_rels.relname= p_parent)
190+
FROM pg_pathman_rels
191+
JOIN pg_classAS parentONparent.relname=pg_pathman_rels.relname
192+
JOIN pg_inheritsON inhparent=parent.relfilenode
193+
JOIN pg_constraintON conrelid= inhrelidAND contype='c'
194+
JOIN pg_classAS childONchild.relfilenode= inhrelid
195+
WHEREpg_pathman_rels.relname= p_parent)
185196
LOOP
186-
RAISE NOTICE'child %, condition %',rec.relname,rec.consrc;
187-
197+
RAISE NOTICE'Copying data to % (condition: %)',rec.relname,rec.consrc;
188198
EXECUTE format('WITH part_data AS (
189199
DELETE FROM ONLY %s WHERE %s RETURNING *)
190200
INSERT INTO %s SELECT * FROM part_data'

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