Move ltree parentsel() selectivity function into /contrib/ltree.
This commit is contained in:
Bruce Momjian
parent
cae5671945
commit
59d61409cd
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@ -2,15 +2,15 @@
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psql:ltree.sql:7: NOTICE: type "ltree" is not yet defined
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DETAIL: Creating a shell type definition.
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psql:ltree.sql:12: NOTICE: argument type ltree is only a shell
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psql:ltree.sql:299: NOTICE: type "lquery" is not yet defined
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psql:ltree.sql:304: NOTICE: type "lquery" is not yet defined
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DETAIL: Creating a shell type definition.
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psql:ltree.sql:304: NOTICE: argument type lquery is only a shell
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psql:ltree.sql:410: NOTICE: type "ltxtquery" is not yet defined
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psql:ltree.sql:309: NOTICE: argument type lquery is only a shell
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psql:ltree.sql:415: NOTICE: type "ltxtquery" is not yet defined
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DETAIL: Creating a shell type definition.
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psql:ltree.sql:415: NOTICE: argument type ltxtquery is only a shell
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psql:ltree.sql:477: NOTICE: type "ltree_gist" is not yet defined
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psql:ltree.sql:420: NOTICE: argument type ltxtquery is only a shell
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psql:ltree.sql:482: NOTICE: type "ltree_gist" is not yet defined
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DETAIL: Creating a shell type definition.
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psql:ltree.sql:482: NOTICE: argument type ltree_gist is only a shell
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psql:ltree.sql:487: NOTICE: argument type ltree_gist is only a shell
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SELECT ''::ltree;
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ltree
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-------
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@ -225,6 +225,11 @@ RETURNS ltree
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AS 'MODULE_PATHNAME'
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LANGUAGE C RETURNS NULL ON NULL INPUT IMMUTABLE;
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CREATE FUNCTION ltreeparentsel(internal, oid, internal, integer)
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RETURNS float8
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AS 'MODULE_PATHNAME'
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LANGUAGE C RETURNS NULL ON NULL INPUT IMMUTABLE;
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CREATE OPERATOR @> (
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LEFTARG = ltree,
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RIGHTARG = ltree,
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@ -1,12 +1,19 @@
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/*
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* op function for ltree
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* Teodor Sigaev <teodor@stack.net>
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* $PostgreSQL: pgsql/contrib/ltree/ltree_op.c,v 1.9 2006/03/11 04:38:29 momjian Exp $
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* $PostgreSQL: pgsql/contrib/ltree/ltree_op.c,v 1.10 2006/04/26 22:32:36 momjian Exp $
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*/
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#include "ltree.h"
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#include <ctype.h>
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#include "access/heapam.h"
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#include "catalog/pg_statistic.h"
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#include "nodes/relation.h"
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#include "utils/lsyscache.h"
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#include "utils/selfuncs.h"
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#include "utils/syscache.h"
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/* compare functions */
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PG_FUNCTION_INFO_V1(ltree_cmp);
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PG_FUNCTION_INFO_V1(ltree_lt);
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@ -44,6 +51,7 @@ Datum ltree_textadd(PG_FUNCTION_ARGS);
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Datum lca(PG_FUNCTION_ARGS);
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Datum ltree2text(PG_FUNCTION_ARGS);
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Datum text2ltree(PG_FUNCTION_ARGS);
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Datum ltreeparentsel(PG_FUNCTION_ARGS);
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int
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ltree_compare(const ltree * a, const ltree * b)
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@ -551,3 +559,181 @@ ltree2text(PG_FUNCTION_ARGS)
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PG_RETURN_POINTER(out);
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}
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#define DEFAULT_PARENT_SEL 0.001
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/*
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* ltreeparentsel - Selectivity of parent relationship for ltree data types.
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*/
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Datum
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ltreeparentsel(PG_FUNCTION_ARGS)
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{
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PlannerInfo *root = (PlannerInfo *) PG_GETARG_POINTER(0);
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Oid operator = PG_GETARG_OID(1);
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List *args = (List *) PG_GETARG_POINTER(2);
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int varRelid = PG_GETARG_INT32(3);
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VariableStatData vardata;
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Node *other;
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bool varonleft;
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Datum *values;
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int nvalues;
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float4 *numbers;
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int nnumbers;
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double selec = 0.0;
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/*
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* If expression is not variable <@ something or something <@ variable,
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* then punt and return a default estimate.
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*/
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if (!get_restriction_variable(root, args, varRelid,
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&vardata, &other, &varonleft))
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PG_RETURN_FLOAT8(DEFAULT_PARENT_SEL);
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/*
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* If the something is a NULL constant, assume operator is strict and
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* return zero, ie, operator will never return TRUE.
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*/
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if (IsA(other, Const) &&
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((Const *) other)->constisnull)
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{
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ReleaseVariableStats(vardata);
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PG_RETURN_FLOAT8(0.0);
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}
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if (HeapTupleIsValid(vardata.statsTuple))
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{
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Form_pg_statistic stats;
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double mcvsum = 0.0;
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double mcvsel = 0.0;
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double hissel = 0.0;
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stats = (Form_pg_statistic) GETSTRUCT(vardata.statsTuple);
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if (IsA(other, Const))
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{
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/* Variable is being compared to a known non-null constant */
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Datum constval = ((Const *) other)->constvalue;
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bool match = false;
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int i;
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/*
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* Is the constant "<@" to any of the column's most common values?
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*/
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if (get_attstatsslot(vardata.statsTuple,
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vardata.atttype, vardata.atttypmod,
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STATISTIC_KIND_MCV, InvalidOid,
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&values, &nvalues,
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&numbers, &nnumbers))
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{
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FmgrInfo contproc;
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fmgr_info(get_opcode(operator), &contproc);
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for (i = 0; i < nvalues; i++)
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{
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/* be careful to apply operator right way 'round */
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if (varonleft)
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match = DatumGetBool(FunctionCall2(&contproc,
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values[i],
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constval));
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else
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match = DatumGetBool(FunctionCall2(&contproc,
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constval,
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values[i]));
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/* calculate total selectivity of all most-common-values */
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mcvsum += numbers[i];
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/* calculate selectivity of matching most-common-values */
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if (match)
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mcvsel += numbers[i];
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}
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}
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else
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{
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/* no most-common-values info available */
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values = NULL;
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numbers = NULL;
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i = nvalues = nnumbers = 0;
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}
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free_attstatsslot(vardata.atttype, values, nvalues, NULL, 0);
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/*
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* Is the constant "<@" to any of the column's histogram values?
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*/
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if (get_attstatsslot(vardata.statsTuple,
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vardata.atttype, vardata.atttypmod,
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STATISTIC_KIND_HISTOGRAM, InvalidOid,
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&values, &nvalues,
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NULL, NULL))
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{
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FmgrInfo contproc;
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fmgr_info(get_opcode(operator), &contproc);
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for (i = 0; i < nvalues; i++)
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{
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/* be careful to apply operator right way 'round */
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if (varonleft)
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match = DatumGetBool(FunctionCall2(&contproc,
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values[i],
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constval));
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else
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match = DatumGetBool(FunctionCall2(&contproc,
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constval,
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values[i]));
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/* count matching histogram values */
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if (match)
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hissel++;
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}
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if (hissel > 0.0)
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{
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/*
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* some matching values found inside histogram, divide
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* matching entries number by total histogram entries to
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* get the histogram related selectivity
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*/
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hissel /= nvalues;
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}
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}
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else
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{
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/* no histogram info available */
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values = NULL;
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i = nvalues = 0;
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}
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free_attstatsslot(vardata.atttype, values, nvalues,
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NULL, 0);
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/*
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* calculate selectivity based on MCV and histogram result
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* histogram selectivity needs to be scaled down if there are any
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* most-common-values
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*/
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selec = mcvsel + hissel * (1.0 - mcvsum);
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/*
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* don't return 0.0 selectivity unless all table values are inside
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* mcv
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*/
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if (selec == 0.0 && mcvsum != 1.0)
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selec = DEFAULT_PARENT_SEL;
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}
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else
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selec = DEFAULT_PARENT_SEL;
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}
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else
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selec = DEFAULT_PARENT_SEL;
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ReleaseVariableStats(vardata);
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/* result should be in range, but make sure... */
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CLAMP_PROBABILITY(selec);
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PG_RETURN_FLOAT8((float8) selec);
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}
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@ -9,7 +9,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/geo_selfuncs.c,v 1.28 2006/04/26 18:28:29 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/geo_selfuncs.c,v 1.29 2006/04/26 22:32:52 momjian Exp $
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*
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* XXX These are totally bogus. Perhaps someone will make them do
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* something reasonable, someday.
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@ -20,6 +20,7 @@
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#include "utils/geo_decls.h"
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/*
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* Selectivity functions for geometric operators. These are bogus -- unless
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* we know the actual key distribution in the index, we can't make a good
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@ -92,4 +93,3 @@ contjoinsel(PG_FUNCTION_ARGS)
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{
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PG_RETURN_FLOAT8(0.001);
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}
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@ -15,7 +15,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/selfuncs.c,v 1.200 2006/04/26 18:28:29 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/selfuncs.c,v 1.201 2006/04/26 22:32:56 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -111,26 +111,6 @@
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#include "utils/syscache.h"
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/* Return data from examine_variable and friends */
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typedef struct
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{
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Node *var; /* the Var or expression tree */
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RelOptInfo *rel; /* Relation, or NULL if not identifiable */
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HeapTuple statsTuple; /* pg_statistic tuple, or NULL if none */
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/* NB: if statsTuple!=NULL, it must be freed when caller is done */
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Oid vartype; /* exposed type of expression */
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Oid atttype; /* type to pass to get_attstatsslot */
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int32 atttypmod; /* typmod to pass to get_attstatsslot */
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bool isunique; /* true if matched to a unique index */
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} VariableStatData;
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#define ReleaseVariableStats(vardata) \
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do { \
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if (HeapTupleIsValid((vardata).statsTuple)) \
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ReleaseSysCache((vardata).statsTuple); \
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} while(0)
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static double mcv_selectivity(VariableStatData *vardata, FmgrInfo *opproc,
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Datum constval, double *sumcommonp);
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static double ineq_histogram_selectivity(VariableStatData *vardata,
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@ -158,9 +138,6 @@ static double convert_one_bytea_to_scalar(unsigned char *value, int valuelen,
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int rangelo, int rangehi);
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static char *convert_string_datum(Datum value, Oid typid);
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static double convert_timevalue_to_scalar(Datum value, Oid typid);
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static bool get_restriction_variable(PlannerInfo *root, List *args, int varRelid,
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VariableStatData *vardata, Node **other,
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bool *varonleft);
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static void get_join_variables(PlannerInfo *root, List *args,
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VariableStatData *vardata1,
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VariableStatData *vardata2);
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@ -3172,7 +3149,7 @@ convert_timevalue_to_scalar(Datum value, Oid typid)
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* Note: if there are Vars on both sides of the clause, we must fail, because
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* callers are expecting that the other side will act like a pseudoconstant.
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*/
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static bool
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bool
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get_restriction_variable(PlannerInfo *root, List *args, int varRelid,
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VariableStatData *vardata, Node **other,
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bool *varonleft)
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@ -4852,182 +4829,3 @@ gistcostestimate(PG_FUNCTION_ARGS)
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PG_RETURN_VOID();
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}
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#define DEFAULT_PARENT_SEL 0.001
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/*
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* parentsel - Selectivity of parent relationship for ltree data types.
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*/
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Datum
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parentsel(PG_FUNCTION_ARGS)
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{
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PlannerInfo *root = (PlannerInfo *) PG_GETARG_POINTER(0);
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Oid operator = PG_GETARG_OID(1);
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List *args = (List *) PG_GETARG_POINTER(2);
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int varRelid = PG_GETARG_INT32(3);
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VariableStatData vardata;
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Node *other;
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bool varonleft;
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Datum *values;
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int nvalues;
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float4 *numbers;
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int nnumbers;
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double selec = 0.0;
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/*
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* If expression is not variable <@ something or something <@ variable,
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* then punt and return a default estimate.
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*/
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if (!get_restriction_variable(root, args, varRelid,
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&vardata, &other, &varonleft))
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PG_RETURN_FLOAT8(DEFAULT_PARENT_SEL);
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/*
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* If the something is a NULL constant, assume operator is strict and
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* return zero, ie, operator will never return TRUE.
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*/
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if (IsA(other, Const) &&
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((Const *) other)->constisnull)
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{
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ReleaseVariableStats(vardata);
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PG_RETURN_FLOAT8(0.0);
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}
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if (HeapTupleIsValid(vardata.statsTuple))
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{
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Form_pg_statistic stats;
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double mcvsum = 0.0;
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double mcvsel = 0.0;
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double hissel = 0.0;
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stats = (Form_pg_statistic) GETSTRUCT(vardata.statsTuple);
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if (IsA(other, Const))
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{
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/* Variable is being compared to a known non-null constant */
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Datum constval = ((Const *) other)->constvalue;
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bool match = false;
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int i;
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/*
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* Is the constant "<@" to any of the column's most common values?
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*/
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if (get_attstatsslot(vardata.statsTuple,
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vardata.atttype, vardata.atttypmod,
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STATISTIC_KIND_MCV, InvalidOid,
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&values, &nvalues,
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&numbers, &nnumbers))
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{
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FmgrInfo contproc;
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fmgr_info(get_opcode(operator), &contproc);
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for (i = 0; i < nvalues; i++)
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{
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/* be careful to apply operator right way 'round */
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if (varonleft)
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match = DatumGetBool(FunctionCall2(&contproc,
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values[i],
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constval));
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else
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match = DatumGetBool(FunctionCall2(&contproc,
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constval,
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values[i]));
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/* calculate total selectivity of all most-common-values */
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mcvsum += numbers[i];
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/* calculate selectivity of matching most-common-values */
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if (match)
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mcvsel += numbers[i];
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}
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}
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else
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{
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/* no most-common-values info available */
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values = NULL;
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numbers = NULL;
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i = nvalues = nnumbers = 0;
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}
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free_attstatsslot(vardata.atttype, values, nvalues, NULL, 0);
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/*
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* Is the constant "<@" to any of the column's histogram values?
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*/
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if (get_attstatsslot(vardata.statsTuple,
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vardata.atttype, vardata.atttypmod,
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STATISTIC_KIND_HISTOGRAM, InvalidOid,
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&values, &nvalues,
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NULL, NULL))
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{
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FmgrInfo contproc;
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fmgr_info(get_opcode(operator), &contproc);
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for (i = 0; i < nvalues; i++)
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{
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/* be careful to apply operator right way 'round */
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if (varonleft)
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match = DatumGetBool(FunctionCall2(&contproc,
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values[i],
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constval));
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else
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match = DatumGetBool(FunctionCall2(&contproc,
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constval,
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values[i]));
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/* count matching histogram values */
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if (match)
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hissel++;
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}
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|
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if (hissel > 0.0)
|
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{
|
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/*
|
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* some matching values found inside histogram, divide
|
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* matching entries number by total histogram entries to
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* get the histogram related selectivity
|
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*/
|
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hissel /= nvalues;
|
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}
|
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}
|
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else
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{
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/* no histogram info available */
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values = NULL;
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i = nvalues = 0;
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}
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free_attstatsslot(vardata.atttype, values, nvalues,
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NULL, 0);
|
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|
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|
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/*
|
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* calculate selectivity based on MCV and histogram result
|
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* histogram selectivity needs to be scaled down if there are any
|
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* most-common-values
|
||||
*/
|
||||
selec = mcvsel + hissel * (1.0 - mcvsum);
|
||||
|
||||
/*
|
||||
* don't return 0.0 selectivity unless all table values are inside
|
||||
* mcv
|
||||
*/
|
||||
if (selec == 0.0 && mcvsum != 1.0)
|
||||
selec = DEFAULT_PARENT_SEL;
|
||||
}
|
||||
else
|
||||
selec = DEFAULT_PARENT_SEL;
|
||||
}
|
||||
else
|
||||
selec = DEFAULT_PARENT_SEL;
|
||||
|
||||
ReleaseVariableStats(vardata);
|
||||
|
||||
/* result should be in range, but make sure... */
|
||||
CLAMP_PROBABILITY(selec);
|
||||
|
||||
PG_RETURN_FLOAT8((float8) selec);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -37,7 +37,7 @@
|
|||
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.325 2006/04/26 18:30:10 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.326 2006/04/26 22:33:13 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -53,6 +53,6 @@
|
|||
*/
|
||||
|
||||
/* yyyymmddN */
|
||||
#define CATALOG_VERSION_NO 200604261
|
||||
#define CATALOG_VERSION_NO 200604262
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.407 2006/04/26 18:28:30 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.408 2006/04/26 22:33:17 momjian Exp $
|
||||
*
|
||||
* NOTES
|
||||
* The script catalog/genbki.sh reads this file and generates .bki
|
||||
|
|
@ -3812,8 +3812,6 @@ DATA(insert OID = 2591 ( gist_circle_consistent PGNSP PGUID 12 f f t f i 3 16 "
|
|||
DESCR("GiST support");
|
||||
DATA(insert OID = 2592 ( gist_circle_compress PGNSP PGUID 12 f f t f i 1 2281 "2281" _null_ _null_ _null_ gist_circle_compress - _null_ ));
|
||||
DESCR("GiST support");
|
||||
DATA(insert OID = 2599 ( parentsel PGNSP PGUID 12 f f t f s 4 701 "2281 26 2281 23" _null_ _null_ _null_ parentsel - _null_ ));
|
||||
DESCR("enhanced restriction selectivity for ltree isparent comparison operators");
|
||||
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/utils/selfuncs.h,v 1.29 2006/04/26 18:28:34 momjian Exp $
|
||||
* $PostgreSQL: pgsql/src/include/utils/selfuncs.h,v 1.30 2006/04/26 22:33:36 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -16,6 +16,7 @@
|
|||
#define SELFUNCS_H
|
||||
|
||||
#include "fmgr.h"
|
||||
#include "access/htup.h"
|
||||
#include "nodes/relation.h"
|
||||
|
||||
|
||||
|
|
@ -62,6 +63,26 @@
|
|||
} while (0)
|
||||
|
||||
|
||||
/* Return data from examine_variable and friends */
|
||||
typedef struct
|
||||
{
|
||||
Node *var; /* the Var or expression tree */
|
||||
RelOptInfo *rel; /* Relation, or NULL if not identifiable */
|
||||
HeapTuple statsTuple; /* pg_statistic tuple, or NULL if none */
|
||||
/* NB: if statsTuple!=NULL, it must be freed when caller is done */
|
||||
Oid vartype; /* exposed type of expression */
|
||||
Oid atttype; /* type to pass to get_attstatsslot */
|
||||
int32 atttypmod; /* typmod to pass to get_attstatsslot */
|
||||
bool isunique; /* true if matched to a unique index */
|
||||
} VariableStatData;
|
||||
|
||||
#define ReleaseVariableStats(vardata) \
|
||||
do { \
|
||||
if (HeapTupleIsValid((vardata).statsTuple)) \
|
||||
ReleaseSysCache((vardata).statsTuple); \
|
||||
} while(0)
|
||||
|
||||
|
||||
typedef enum
|
||||
{
|
||||
Pattern_Type_Like, Pattern_Type_Like_IC,
|
||||
|
|
@ -133,7 +154,8 @@ extern Selectivity estimate_hash_bucketsize(PlannerInfo *root, Node *hashkey,
|
|||
extern Datum btcostestimate(PG_FUNCTION_ARGS);
|
||||
extern Datum hashcostestimate(PG_FUNCTION_ARGS);
|
||||
extern Datum gistcostestimate(PG_FUNCTION_ARGS);
|
||||
|
||||
extern Datum parentsel(PG_FUNCTION_ARGS);
|
||||
extern bool get_restriction_variable(PlannerInfo *root, List *args, int varRelid,
|
||||
VariableStatData *vardata, Node **other,
|
||||
bool *varonleft);
|
||||
|
||||
#endif /* SELFUNCS_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue