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Add the ability to store inheritance-tree statistics in pg_statistic,

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and teach ANALYZE to compute such stats for tables that have subclasses.
Per my proposal of yesterday.

autovacuum still needs to be taught about running ANALYZE on parent tables
when their subclasses change, but the feature is useful even without that.
This commit is contained in:
Tom Lane
2009-12-29 20:11:45 +00:00
parent 84d723b6ce
commit 649b5ec7c8
18 changed files with 407 additions and 177 deletions
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8
src/backend/optimizer/plan/createplan.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.267 2009/11/15 02:45:35 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/createplan.c,v 1.268 2009/12/29 20:11:45 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -115,6 +115,7 @@ static HashJoin *make_hashjoin(List *tlist,
static Hash *make_hash(Plan *lefttree,
Oid skewTable,
AttrNumber skewColumn,
bool skewInherit,
Oid skewColType,
int32 skewColTypmod);
static MergeJoin *make_mergejoin(List *tlist,
@ -1898,6 +1899,7 @@ create_hashjoin_plan(PlannerInfo *root,
List *hashclauses;
Oid skewTable = InvalidOid;
AttrNumber skewColumn = InvalidAttrNumber;
bool skewInherit = false;
Oid skewColType = InvalidOid;
int32 skewColTypmod = -1;
HashJoin *join_plan;
@ -1969,6 +1971,7 @@ create_hashjoin_plan(PlannerInfo *root,
{
skewTable = rte->relid;
skewColumn = var->varattno;
skewInherit = rte->inh;
skewColType = var->vartype;
skewColTypmod = var->vartypmod;
}
@ -1981,6 +1984,7 @@ create_hashjoin_plan(PlannerInfo *root,
hash_plan = make_hash(inner_plan,
skewTable,
skewColumn,
skewInherit,
skewColType,
skewColTypmod);
join_plan = make_hashjoin(tlist,
@ -2794,6 +2798,7 @@ static Hash *
make_hash(Plan *lefttree,
Oid skewTable,
AttrNumber skewColumn,
bool skewInherit,
Oid skewColType,
int32 skewColTypmod)
{
@ -2814,6 +2819,7 @@ make_hash(Plan *lefttree,
node->skewTable = skewTable;
node->skewColumn = skewColumn;
node->skewInherit = skewInherit;
node->skewColType = skewColType;
node->skewColTypmod = skewColTypmod;