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Commit2e6b5cb

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pathman: DELETE and UPDATE problem solved, UPDATE trigger added
1 parenta7caca9 commit2e6b5cb

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2 files changed

+157
-20
lines changed

2 files changed

+157
-20
lines changed

‎contrib/pathman/pathman--0.1.sql‎

Lines changed: 63 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -42,15 +42,17 @@ BEGIN
4242
/* Create partitions and update pg_pathman configuration*/
4343
FOR partnumIN0..partitions_count-1
4444
LOOP
45-
EXECUTE format('CREATE TABLE %s_%s (LIKE %1$s INCLUDING ALL)', relation, partnum);
45+
-- EXECUTE format('CREATE TABLE %s_%s (LIKE %1$s INCLUDING ALL)', relation, partnum);
46+
EXECUTE format('CREATE TABLE %s_%s () INHERITS (%1$s)', relation, partnum);
4647
-- child_oid := relfilenode FROM pg_class WHERE relname = format('%s_%s', relation, partnum);
4748
INSERT INTO pg_pathman_hash_rels (parent, hash, child)
4849
VALUES (relation, partnum, format('%s_%s', relation, partnum));
4950
END LOOP;
5051
INSERT INTO pg_pathman_rels (relname, attr, parttype)VALUES (relation, attribute,1);
5152

52-
/* Create trigger*/
53-
PERFORM create_hash_trigger(relation, attribute, partitions_count);
53+
/* Create triggers*/
54+
PERFORM create_hash_insert_trigger(relation, attribute, partitions_count);
55+
PERFORM create_hash_update_trigger(relation, attribute, partitions_count);
5456
/* Notify backend about changes*/
5557
PERFORM pg_pathman_on_create_partitions(relid);
5658
END
@@ -59,22 +61,21 @@ $$ LANGUAGE plpgsql;
5961
/*
6062
* Creates hash trigger for specified relation
6163
*/
62-
CREATE OR REPLACEFUNCTIONpublic.create_hash_trigger(IN relationTEXT,IN attrTEXT,IN partitions_countINTEGER)
64+
CREATE OR REPLACEFUNCTIONpublic.create_hash_insert_trigger(IN relationTEXT,IN attrTEXT,IN partitions_countINTEGER)
6365
RETURNS VOIDAS
6466
$$
6567
DECLARE
66-
funcTEXT :='CREATE OR REPLACE FUNCTION %s_hash_trigger_func()'||
68+
funcTEXT :='CREATE OR REPLACE FUNCTION %s_hash_insert_trigger_func()'||
6769
'RETURNS TRIGGER AS $body$ DECLARE hash INTEGER; BEGIN'||
6870
'hash := NEW.%s %% %s; %s'||
6971
'RETURN NULL; END $body$ LANGUAGE plpgsql;';
70-
triggerTEXT :='CREATE TRIGGER %s_trigger'||
72+
triggerTEXT :='CREATE TRIGGER %s_insert_trigger'||
7173
'BEFORE INSERT ON %1$s'||
72-
'FOR EACH ROW EXECUTE PROCEDURE %1$s_hash_trigger_func();';
74+
'FOR EACH ROW EXECUTE PROCEDURE %1$s_hash_insert_trigger_func();';
7375
relidINTEGER;
7476
fieldsTEXT;
7577
fields_formatTEXT;
7678
insert_stmtTEXT;
77-
execute_stmtTEXT;
7879
BEGIN
7980
/* drop trigger and corresponding function*/
8081
PERFORM drop_hash_trigger(relation);
@@ -111,7 +112,7 @@ DECLARE
111112
qTEXT :='DROP TABLE %s_%s';
112113
BEGIN
113114
/* Drop trigger first*/
114-
PERFORMdrop_hash_trigger(relation);
115+
PERFORMdrop_hash_triggers(relation);
115116

116117
relid := relfilenodeFROM pg_classWHERE relname= relation;
117118
partitions_count :=COUNT(*)FROM pg_pathman_hash_relsWHERE parent= relation;
@@ -132,12 +133,14 @@ $$ LANGUAGE plpgsql;
132133
/*
133134
* Drops hash trigger
134135
*/
135-
CREATE OR REPLACEFUNCTIONpublic.drop_hash_trigger(IN relationTEXT)
136+
CREATE OR REPLACEFUNCTIONpublic.drop_hash_triggers(IN relationTEXT)
136137
RETURNS VOIDAS
137138
$$
138139
BEGIN
139-
EXECUTE format('DROP TRIGGER IF EXISTS %s_trigger ON %1$s', relation);
140-
EXECUTE format('DROP FUNCTION IF EXISTS %s_hash_trigger_func()', relation);
140+
EXECUTE format('DROP TRIGGER IF EXISTS %s_insert_trigger ON %1$s', relation);
141+
EXECUTE format('DROP FUNCTION IF EXISTS %s_hash_insert_trigger_func()', relation);
142+
EXECUTE format('DROP TRIGGER IF EXISTS %s_update_trigger ON %1$s', relation);
143+
EXECUTE format('DROP FUNCTION IF EXISTS %s_hash_update_trigger_func()', relation);
141144
END
142145
$$ LANGUAGE plpgsql;
143146

@@ -148,6 +151,54 @@ CREATE OR REPLACE FUNCTION pg_pathman_on_remove_partitions(relid INTEGER)
148151
RETURNS VOIDAS'pathman','on_partitions_removed' LANGUAGE C STRICT;
149152

150153

154+
CREATE OR REPLACEFUNCTIONpublic.create_hash_update_trigger(IN relationTEXT,IN attrTEXT,IN partitions_countINTEGER)
155+
RETURNS VOIDAS
156+
$$
157+
DECLARE
158+
funcTEXT :='CREATE OR REPLACE FUNCTION %s_update_trigger_func() RETURNS TRIGGER AS'||
159+
'$body$ DECLARE old_hash INTEGER; new_hash INTEGER; q TEXT; BEGIN'||
160+
'old_hash := OLD.%2$s %% %3$s;'||
161+
'new_hash := NEW.%2$s %% %3$s;'||
162+
'IF old_hash = new_hash THEN RETURN NEW; END IF;'||
163+
'q := format(''DELETE FROM %1$s_%%s WHERE %4$s'', old_hash);'||
164+
'EXECUTE q USING %5$s;'||
165+
'q := format(''INSERT INTO %1$s_%%s VALUES (%6$s)'', new_hash);'||
166+
'EXECUTE q USING %7$s;'||
167+
'RETURN NULL;'||
168+
'END $body$ LANGUAGE plpgsql';
169+
triggerTEXT :='CREATE TRIGGER %s_update_trigger'||
170+
'BEFORE UPDATE ON %1$s_%s'||
171+
'FOR EACH ROW EXECUTE PROCEDURE %1$s_update_trigger_func()';
172+
att_namesTEXT;
173+
old_fieldsTEXT;
174+
new_fieldsTEXT;
175+
att_val_fmtTEXT;
176+
att_fmtTEXT;
177+
relidINTEGER;
178+
BEGIN
179+
relid := relfilenodeFROM pg_classWHERE relname= relation;
180+
SELECT string_agg(attname,','),
181+
string_agg('OLD.'|| attname,','),
182+
string_agg('NEW.'|| attname,','),
183+
string_agg(attname||'=$'|| attnum,' AND'),
184+
string_agg('$'|| attnum,',')
185+
FROM pg_attribute
186+
WHERE attrelid=relidAND attnum>0
187+
INTO att_names,
188+
old_fields,
189+
new_fields,
190+
att_val_fmt,
191+
att_fmt;
192+
193+
EXECUTE format(func, relation, attr, partitions_count, att_val_fmt,
194+
old_fields, att_fmt, new_fields);
195+
FOR numIN0..partitions_count-1
196+
LOOP
197+
EXECUTE format(trigger, relation, num);
198+
END LOOP;
199+
END
200+
$$ LANGUAGE plpgsql;
201+
151202
-- CREATE OR REPLACE FUNCTION sample_rel_trigger_func()
152203
-- RETURNS TRIGGER AS $$
153204
-- DECLARE

‎contrib/pathman/pathman.c‎

Lines changed: 94 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -5,6 +5,7 @@
55
#include"nodes/primnodes.h"
66
#include"optimizer/paths.h"
77
#include"optimizer/pathnode.h"
8+
#include"optimizer/planner.h"
89
#include"utils/hsearch.h"
910
#include"utils/tqual.h"
1011
#include"utils/rel.h"
@@ -72,6 +73,8 @@ void _PG_init(void);
7273
void_PG_fini(void);
7374
staticvoidmy_shmem_startup(void);
7475
staticvoidmy_hook(PlannerInfo*root,RelOptInfo*rel,Indexrti,RangeTblEntry*rte);
76+
staticPlannedStmt*my_planner_hook(Query*parse,intcursorOptions,ParamListInfoboundParams);
77+
7578
staticvoidappend_child_relation(PlannerInfo*root,RelOptInfo*rel,Indexrti,RangeTblEntry*rte,intchildOID);
7679
staticvoidinit(void);
7780
staticvoidcreate_part_relations_hashtable(void);
@@ -85,6 +88,7 @@ static List *handle_opexpr(const OpExpr *expr, const PartRelationInfo *prel);
8588
staticList*handle_boolexpr(constBoolExpr*expr,constPartRelationInfo*prel);
8689
staticList*handle_arrexpr(constScalarArrayOpExpr*expr,constPartRelationInfo*prel);
8790

91+
staticvoidset_plain_rel_pathlist(PlannerInfo*root,RelOptInfo*rel,RangeTblEntry*rte);
8892
staticvoidset_append_rel_pathlist(PlannerInfo*root,RelOptInfo*rel,Indexrti,RangeTblEntry*rte);
8993
staticList*accumulate_append_subpath(List*subpaths,Path*path);
9094

@@ -102,6 +106,10 @@ _PG_init(void)
102106
set_rel_pathlist_hook=my_hook;
103107
shmem_startup_hook_original=shmem_startup_hook;
104108
shmem_startup_hook=my_shmem_startup;
109+
110+
planner_hook=my_planner_hook;
111+
/* TEMP */
112+
// get_relation_info_hook = my_get_relation_info;
105113
}
106114

107115
void
@@ -113,6 +121,38 @@ _PG_fini(void)
113121
hash_destroy(hash_restrictions);
114122
}
115123

124+
PlannedStmt*
125+
my_planner_hook(Query*parse,intcursorOptions,ParamListInfoboundParams)
126+
{
127+
PlannedStmt*result;
128+
RangeTblEntry*rte;
129+
ListCell*lc;
130+
PartRelationInfo*prel;
131+
132+
if (initialization_needed)
133+
init();
134+
135+
/* Disable inheritance for relations covered by pathman (only for SELECT for now) */
136+
if (parse->commandType==CMD_SELECT)
137+
{
138+
foreach(lc,parse->rtable)
139+
{
140+
rte= (RangeTblEntry*)lfirst(lc);
141+
if (rte->inh)
142+
{
143+
/* look up this relation in pathman relations */
144+
prel= (PartRelationInfo*)
145+
hash_search(relations, (constvoid*)&rte->relid,HASH_FIND,0);
146+
if (prel!=NULL)
147+
rte->inh= false;
148+
}
149+
}
150+
}
151+
152+
result=standard_planner(parse,cursorOptions,boundParams);
153+
returnresult;
154+
}
155+
116156
/*
117157
* Initialize hashtables
118158
*/
@@ -141,28 +181,31 @@ my_shmem_startup(void)
141181
void
142182
my_hook(PlannerInfo*root,RelOptInfo*rel,Indexrti,RangeTblEntry*rte)
143183
{
144-
PartRelationInfo*partrel=NULL;
184+
PartRelationInfo*prel=NULL;
145185

146-
if (initialization_needed)
147-
init();
186+
/* This works on for SELECT queries */
187+
if (root->parse->commandType!=CMD_SELECT)
188+
return;
148189

149190
/* Lookup partitioning information for parent relation */
150-
partrel= (PartRelationInfo*)
191+
prel= (PartRelationInfo*)
151192
hash_search(relations, (constvoid*)&rte->relid,HASH_FIND,0);
152193

153-
if (partrel!=NULL)
194+
if (prel!=NULL)
154195
{
155196
List*children=NIL;
156197
ListCell*lc;
157198
intchildOID=-1;
158199
inti;
159200

201+
rte->inh= true;
202+
160203
/* Run over restrictions and collect children partitions */
161204
ereport(LOG, (errmsg("Checking restrictions")));
162205
foreach(lc,rel->baserestrictinfo)
163206
{
164207
RestrictInfo*rinfo= (RestrictInfo*)lfirst(lc);
165-
List*ret=walk_expr_tree(rinfo->clause,partrel);
208+
List*ret=walk_expr_tree(rinfo->clause,prel);
166209
children=list_concat_unique_int(children,ret);
167210
list_free(ret);
168211
}
@@ -172,8 +215,8 @@ my_hook(PlannerInfo *root, RelOptInfo *rel, Index rti, RangeTblEntry *rte)
172215
ereport(LOG, (errmsg("Restrictions empty. Copy children from partrel")));
173216
// children = get_children_oids(partrel);
174217
// children = list_copy(partrel->children);
175-
for (i=0;i<partrel->children_count;i++)
176-
children=lappend_int(children,partrel->children[i]);
218+
for (i=0;i<prel->children_count;i++)
219+
children=lappend_int(children,prel->children[i]);
177220
}
178221

179222
if (length(children)>0)
@@ -210,6 +253,18 @@ my_hook(PlannerInfo *root, RelOptInfo *rel, Index rti, RangeTblEntry *rte)
210253
}
211254

212255
ereport(LOG, (errmsg("Appending children")));
256+
// Добавляем самого себя
257+
// append_child_relation(root, rel, rti, rte, partrel->oid);
258+
// {
259+
// AppendRelInfo *appinfo;
260+
// appinfo = makeNode(AppendRelInfo);
261+
// appinfo->parent_relid = rti;
262+
// appinfo->child_relid = rti;
263+
// appinfo->parent_reloid = rte->relid;
264+
// root->append_rel_list = lappend(root->append_rel_list, appinfo);
265+
// }
266+
// root->hasInheritedTarget = true;
267+
213268
foreach(lc,children)
214269
{
215270
childOID= (Oid)lfirst_int(lc);
@@ -219,7 +274,38 @@ my_hook(PlannerInfo *root, RelOptInfo *rel, Index rti, RangeTblEntry *rte)
219274

220275
/* TODO: clear old path list */
221276
rel->pathlist=NIL;
277+
// if (root->parse->commandType == CMD_SELECT)
222278
set_append_rel_pathlist(root,rel,rti,rte);
279+
// else
280+
// {
281+
// set_plain_rel_pathlist(root, rel, rte);
282+
// /* Set plin pathlist for each child relation */
283+
// intparentRTindex = rti;
284+
// ListCell *l;
285+
// foreach(l, root->append_rel_list)
286+
// {
287+
// AppendRelInfo *appinfo = (AppendRelInfo *) lfirst(l);
288+
// intchildRTindex;
289+
// RangeTblEntry *childRTE;
290+
// RelOptInfo *childrel;
291+
292+
// /* append_rel_list contains all append rels; ignore others */
293+
// if (appinfo->parent_relid != parentRTindex || appinfo->parent_relid == rti)
294+
// continue;
295+
296+
// /* Re-locate the child RTE and RelOptInfo */
297+
// childRTindex = appinfo->child_relid;
298+
// // childRTE = root->simple_rte_array[childRTindex];
299+
// // childrel = root->simple_rel_array[childRTindex];
300+
// root->simple_rel_array[childRTindex] = NULL;
301+
302+
// /*
303+
// * Compute the child's access paths.
304+
// */
305+
// // set_plain_rel_pathlist(root, childrel, childRTE);
306+
// // set_cheapest(childrel);
307+
// }
308+
// }
223309
}
224310

225311
/* Invoke original hook if needed */

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