mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-09-28 00:21:50 +02:00
a4d75c86bf
Allow defining extended statistics on expressions, not just just on
simple column references. With this commit, expressions are supported
by all existing extended statistics kinds, improving the same types of
estimates. A simple example may look like this:
CREATE TABLE t (a int);
CREATE STATISTICS s ON mod(a,10), mod(a,20) FROM t;
ANALYZE t;
The collected statistics are useful e.g. to estimate queries with those
expressions in WHERE or GROUP BY clauses:
SELECT * FROM t WHERE mod(a,10) = 0 AND mod(a,20) = 0;
SELECT 1 FROM t GROUP BY mod(a,10), mod(a,20);
This introduces new internal statistics kind 'e' (expressions) which is
built automatically when the statistics object definition includes any
expressions. This represents single-expression statistics, as if there
was an expression index (but without the index maintenance overhead).
The statistics is stored in pg_statistics_ext_data as an array of
composite types, which is possible thanks to 79f6a942bd.
CREATE STATISTICS allows building statistics on a single expression, in
which case in which case it's not possible to specify statistics kinds.
A new system view pg_stats_ext_exprs can be used to display expression
statistics, similarly to pg_stats and pg_stats_ext views.
ALTER TABLE ... ALTER COLUMN ... TYPE now treats indexes the same way it
treats indexes, i.e. it drops and recreates the statistics. This means
all statistics are reset, and we no longer try to preserve at least the
functional dependencies. This should not be a major issue in practice,
as the functional dependencies actually rely on per-column statistics,
which were always reset anyway.
Author: Tomas Vondra
Reviewed-by: Justin Pryzby, Dean Rasheed, Zhihong Yu
Discussion: https://postgr.es/m/ad7891d2-e90c-b446-9fe2-7419143847d7%40enterprisedb.com
267 lines
15 KiB
Plaintext
267 lines
15 KiB
Plaintext
--
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-- Verify system catalog foreign key relationships
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--
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DO $doblock$
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declare
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fk record;
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nkeys integer;
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cmd text;
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err record;
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begin
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for fk in select * from pg_get_catalog_foreign_keys()
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loop
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raise notice 'checking % % => % %',
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fk.fktable, fk.fkcols, fk.pktable, fk.pkcols;
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nkeys := array_length(fk.fkcols, 1);
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cmd := 'SELECT ctid';
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for i in 1 .. nkeys loop
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cmd := cmd || ', ' || quote_ident(fk.fkcols[i]);
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end loop;
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if fk.is_array then
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cmd := cmd || ' FROM (SELECT ctid';
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for i in 1 .. nkeys-1 loop
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cmd := cmd || ', ' || quote_ident(fk.fkcols[i]);
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end loop;
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cmd := cmd || ', unnest(' || quote_ident(fk.fkcols[nkeys]);
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cmd := cmd || ') as ' || quote_ident(fk.fkcols[nkeys]);
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cmd := cmd || ' FROM ' || fk.fktable::text || ') fk WHERE ';
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else
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cmd := cmd || ' FROM ' || fk.fktable::text || ' fk WHERE ';
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end if;
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if fk.is_opt then
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for i in 1 .. nkeys loop
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cmd := cmd || quote_ident(fk.fkcols[i]) || ' != 0 AND ';
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end loop;
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end if;
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cmd := cmd || 'NOT EXISTS(SELECT 1 FROM ' || fk.pktable::text || ' pk WHERE ';
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for i in 1 .. nkeys loop
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if i > 1 then cmd := cmd || ' AND '; end if;
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cmd := cmd || 'pk.' || quote_ident(fk.pkcols[i]);
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cmd := cmd || ' = fk.' || quote_ident(fk.fkcols[i]);
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end loop;
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cmd := cmd || ')';
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-- raise notice 'cmd = %', cmd;
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for err in execute cmd loop
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raise warning 'FK VIOLATION IN %(%): %', fk.fktable, fk.fkcols, err;
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end loop;
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end loop;
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end
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$doblock$;
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NOTICE: checking pg_proc {pronamespace} => pg_namespace {oid}
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NOTICE: checking pg_proc {proowner} => pg_authid {oid}
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NOTICE: checking pg_proc {prolang} => pg_language {oid}
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NOTICE: checking pg_proc {provariadic} => pg_type {oid}
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NOTICE: checking pg_proc {prosupport} => pg_proc {oid}
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NOTICE: checking pg_proc {prorettype} => pg_type {oid}
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NOTICE: checking pg_proc {proargtypes} => pg_type {oid}
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NOTICE: checking pg_proc {proallargtypes} => pg_type {oid}
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NOTICE: checking pg_proc {protrftypes} => pg_type {oid}
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NOTICE: checking pg_type {typnamespace} => pg_namespace {oid}
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NOTICE: checking pg_type {typowner} => pg_authid {oid}
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NOTICE: checking pg_type {typrelid} => pg_class {oid}
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NOTICE: checking pg_type {typsubscript} => pg_proc {oid}
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NOTICE: checking pg_type {typelem} => pg_type {oid}
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NOTICE: checking pg_type {typarray} => pg_type {oid}
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NOTICE: checking pg_type {typinput} => pg_proc {oid}
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NOTICE: checking pg_type {typoutput} => pg_proc {oid}
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NOTICE: checking pg_type {typreceive} => pg_proc {oid}
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NOTICE: checking pg_type {typsend} => pg_proc {oid}
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NOTICE: checking pg_type {typmodin} => pg_proc {oid}
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NOTICE: checking pg_type {typmodout} => pg_proc {oid}
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NOTICE: checking pg_type {typanalyze} => pg_proc {oid}
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NOTICE: checking pg_type {typbasetype} => pg_type {oid}
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NOTICE: checking pg_type {typcollation} => pg_collation {oid}
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NOTICE: checking pg_attribute {attrelid} => pg_class {oid}
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NOTICE: checking pg_attribute {atttypid} => pg_type {oid}
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NOTICE: checking pg_attribute {attcollation} => pg_collation {oid}
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NOTICE: checking pg_class {relnamespace} => pg_namespace {oid}
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NOTICE: checking pg_class {reltype} => pg_type {oid}
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NOTICE: checking pg_class {reloftype} => pg_type {oid}
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NOTICE: checking pg_class {relowner} => pg_authid {oid}
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NOTICE: checking pg_class {relam} => pg_am {oid}
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NOTICE: checking pg_class {reltablespace} => pg_tablespace {oid}
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NOTICE: checking pg_class {reltoastrelid} => pg_class {oid}
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NOTICE: checking pg_class {relrewrite} => pg_class {oid}
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NOTICE: checking pg_attrdef {adrelid} => pg_class {oid}
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NOTICE: checking pg_attrdef {adrelid,adnum} => pg_attribute {attrelid,attnum}
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NOTICE: checking pg_constraint {connamespace} => pg_namespace {oid}
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NOTICE: checking pg_constraint {conrelid} => pg_class {oid}
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NOTICE: checking pg_constraint {contypid} => pg_type {oid}
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NOTICE: checking pg_constraint {conindid} => pg_class {oid}
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NOTICE: checking pg_constraint {conparentid} => pg_constraint {oid}
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NOTICE: checking pg_constraint {confrelid} => pg_class {oid}
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NOTICE: checking pg_constraint {conpfeqop} => pg_operator {oid}
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NOTICE: checking pg_constraint {conppeqop} => pg_operator {oid}
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NOTICE: checking pg_constraint {conffeqop} => pg_operator {oid}
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NOTICE: checking pg_constraint {conexclop} => pg_operator {oid}
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NOTICE: checking pg_constraint {conrelid,conkey} => pg_attribute {attrelid,attnum}
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NOTICE: checking pg_constraint {confrelid,confkey} => pg_attribute {attrelid,attnum}
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NOTICE: checking pg_inherits {inhrelid} => pg_class {oid}
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NOTICE: checking pg_inherits {inhparent} => pg_class {oid}
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NOTICE: checking pg_index {indexrelid} => pg_class {oid}
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NOTICE: checking pg_index {indrelid} => pg_class {oid}
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NOTICE: checking pg_index {indcollation} => pg_collation {oid}
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NOTICE: checking pg_index {indclass} => pg_opclass {oid}
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NOTICE: checking pg_index {indrelid,indkey} => pg_attribute {attrelid,attnum}
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NOTICE: checking pg_operator {oprnamespace} => pg_namespace {oid}
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NOTICE: checking pg_operator {oprowner} => pg_authid {oid}
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NOTICE: checking pg_operator {oprleft} => pg_type {oid}
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NOTICE: checking pg_operator {oprright} => pg_type {oid}
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NOTICE: checking pg_operator {oprresult} => pg_type {oid}
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NOTICE: checking pg_operator {oprcom} => pg_operator {oid}
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NOTICE: checking pg_operator {oprnegate} => pg_operator {oid}
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NOTICE: checking pg_operator {oprcode} => pg_proc {oid}
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NOTICE: checking pg_operator {oprrest} => pg_proc {oid}
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NOTICE: checking pg_operator {oprjoin} => pg_proc {oid}
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NOTICE: checking pg_opfamily {opfmethod} => pg_am {oid}
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NOTICE: checking pg_opfamily {opfnamespace} => pg_namespace {oid}
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NOTICE: checking pg_opfamily {opfowner} => pg_authid {oid}
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NOTICE: checking pg_opclass {opcmethod} => pg_am {oid}
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NOTICE: checking pg_opclass {opcnamespace} => pg_namespace {oid}
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NOTICE: checking pg_opclass {opcowner} => pg_authid {oid}
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NOTICE: checking pg_opclass {opcfamily} => pg_opfamily {oid}
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NOTICE: checking pg_opclass {opcintype} => pg_type {oid}
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NOTICE: checking pg_opclass {opckeytype} => pg_type {oid}
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NOTICE: checking pg_am {amhandler} => pg_proc {oid}
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NOTICE: checking pg_amop {amopfamily} => pg_opfamily {oid}
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NOTICE: checking pg_amop {amoplefttype} => pg_type {oid}
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NOTICE: checking pg_amop {amoprighttype} => pg_type {oid}
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NOTICE: checking pg_amop {amopopr} => pg_operator {oid}
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NOTICE: checking pg_amop {amopmethod} => pg_am {oid}
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NOTICE: checking pg_amop {amopsortfamily} => pg_opfamily {oid}
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NOTICE: checking pg_amproc {amprocfamily} => pg_opfamily {oid}
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NOTICE: checking pg_amproc {amproclefttype} => pg_type {oid}
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NOTICE: checking pg_amproc {amprocrighttype} => pg_type {oid}
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NOTICE: checking pg_amproc {amproc} => pg_proc {oid}
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NOTICE: checking pg_language {lanowner} => pg_authid {oid}
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NOTICE: checking pg_language {lanplcallfoid} => pg_proc {oid}
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NOTICE: checking pg_language {laninline} => pg_proc {oid}
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NOTICE: checking pg_language {lanvalidator} => pg_proc {oid}
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NOTICE: checking pg_largeobject_metadata {lomowner} => pg_authid {oid}
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NOTICE: checking pg_largeobject {loid} => pg_largeobject_metadata {oid}
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NOTICE: checking pg_aggregate {aggfnoid} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggtransfn} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggfinalfn} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggcombinefn} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggserialfn} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggdeserialfn} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggmtransfn} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggminvtransfn} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggmfinalfn} => pg_proc {oid}
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NOTICE: checking pg_aggregate {aggsortop} => pg_operator {oid}
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NOTICE: checking pg_aggregate {aggtranstype} => pg_type {oid}
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NOTICE: checking pg_aggregate {aggmtranstype} => pg_type {oid}
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NOTICE: checking pg_statistic {starelid} => pg_class {oid}
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NOTICE: checking pg_statistic {staop1} => pg_operator {oid}
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NOTICE: checking pg_statistic {staop2} => pg_operator {oid}
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NOTICE: checking pg_statistic {staop3} => pg_operator {oid}
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NOTICE: checking pg_statistic {staop4} => pg_operator {oid}
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NOTICE: checking pg_statistic {staop5} => pg_operator {oid}
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NOTICE: checking pg_statistic {stacoll1} => pg_collation {oid}
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NOTICE: checking pg_statistic {stacoll2} => pg_collation {oid}
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NOTICE: checking pg_statistic {stacoll3} => pg_collation {oid}
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NOTICE: checking pg_statistic {stacoll4} => pg_collation {oid}
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NOTICE: checking pg_statistic {stacoll5} => pg_collation {oid}
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NOTICE: checking pg_statistic {starelid,staattnum} => pg_attribute {attrelid,attnum}
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NOTICE: checking pg_statistic_ext {stxrelid} => pg_class {oid}
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NOTICE: checking pg_statistic_ext {stxnamespace} => pg_namespace {oid}
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NOTICE: checking pg_statistic_ext {stxowner} => pg_authid {oid}
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NOTICE: checking pg_statistic_ext {stxrelid,stxkeys} => pg_attribute {attrelid,attnum}
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NOTICE: checking pg_statistic_ext_data {stxoid} => pg_statistic_ext {oid}
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NOTICE: checking pg_rewrite {ev_class} => pg_class {oid}
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NOTICE: checking pg_trigger {tgrelid} => pg_class {oid}
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NOTICE: checking pg_trigger {tgparentid} => pg_trigger {oid}
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NOTICE: checking pg_trigger {tgfoid} => pg_proc {oid}
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NOTICE: checking pg_trigger {tgconstrrelid} => pg_class {oid}
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NOTICE: checking pg_trigger {tgconstrindid} => pg_class {oid}
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NOTICE: checking pg_trigger {tgconstraint} => pg_constraint {oid}
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NOTICE: checking pg_trigger {tgrelid,tgattr} => pg_attribute {attrelid,attnum}
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NOTICE: checking pg_event_trigger {evtowner} => pg_authid {oid}
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NOTICE: checking pg_event_trigger {evtfoid} => pg_proc {oid}
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NOTICE: checking pg_description {classoid} => pg_class {oid}
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NOTICE: checking pg_cast {castsource} => pg_type {oid}
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NOTICE: checking pg_cast {casttarget} => pg_type {oid}
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NOTICE: checking pg_cast {castfunc} => pg_proc {oid}
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NOTICE: checking pg_enum {enumtypid} => pg_type {oid}
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NOTICE: checking pg_namespace {nspowner} => pg_authid {oid}
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NOTICE: checking pg_conversion {connamespace} => pg_namespace {oid}
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NOTICE: checking pg_conversion {conowner} => pg_authid {oid}
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NOTICE: checking pg_conversion {conproc} => pg_proc {oid}
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NOTICE: checking pg_depend {classid} => pg_class {oid}
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NOTICE: checking pg_depend {refclassid} => pg_class {oid}
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NOTICE: checking pg_database {datdba} => pg_authid {oid}
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NOTICE: checking pg_database {dattablespace} => pg_tablespace {oid}
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NOTICE: checking pg_db_role_setting {setdatabase} => pg_database {oid}
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NOTICE: checking pg_db_role_setting {setrole} => pg_authid {oid}
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NOTICE: checking pg_tablespace {spcowner} => pg_authid {oid}
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NOTICE: checking pg_auth_members {roleid} => pg_authid {oid}
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NOTICE: checking pg_auth_members {member} => pg_authid {oid}
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NOTICE: checking pg_auth_members {grantor} => pg_authid {oid}
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NOTICE: checking pg_shdepend {dbid} => pg_database {oid}
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NOTICE: checking pg_shdepend {classid} => pg_class {oid}
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NOTICE: checking pg_shdepend {refclassid} => pg_class {oid}
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NOTICE: checking pg_shdescription {classoid} => pg_class {oid}
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NOTICE: checking pg_ts_config {cfgnamespace} => pg_namespace {oid}
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NOTICE: checking pg_ts_config {cfgowner} => pg_authid {oid}
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NOTICE: checking pg_ts_config {cfgparser} => pg_ts_parser {oid}
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NOTICE: checking pg_ts_config_map {mapcfg} => pg_ts_config {oid}
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NOTICE: checking pg_ts_config_map {mapdict} => pg_ts_dict {oid}
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NOTICE: checking pg_ts_dict {dictnamespace} => pg_namespace {oid}
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NOTICE: checking pg_ts_dict {dictowner} => pg_authid {oid}
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NOTICE: checking pg_ts_dict {dicttemplate} => pg_ts_template {oid}
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NOTICE: checking pg_ts_parser {prsnamespace} => pg_namespace {oid}
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NOTICE: checking pg_ts_parser {prsstart} => pg_proc {oid}
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NOTICE: checking pg_ts_parser {prstoken} => pg_proc {oid}
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NOTICE: checking pg_ts_parser {prsend} => pg_proc {oid}
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NOTICE: checking pg_ts_parser {prsheadline} => pg_proc {oid}
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NOTICE: checking pg_ts_parser {prslextype} => pg_proc {oid}
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NOTICE: checking pg_ts_template {tmplnamespace} => pg_namespace {oid}
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NOTICE: checking pg_ts_template {tmplinit} => pg_proc {oid}
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NOTICE: checking pg_ts_template {tmpllexize} => pg_proc {oid}
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NOTICE: checking pg_extension {extowner} => pg_authid {oid}
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NOTICE: checking pg_extension {extnamespace} => pg_namespace {oid}
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NOTICE: checking pg_extension {extconfig} => pg_class {oid}
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NOTICE: checking pg_foreign_data_wrapper {fdwowner} => pg_authid {oid}
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NOTICE: checking pg_foreign_data_wrapper {fdwhandler} => pg_proc {oid}
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NOTICE: checking pg_foreign_data_wrapper {fdwvalidator} => pg_proc {oid}
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NOTICE: checking pg_foreign_server {srvowner} => pg_authid {oid}
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NOTICE: checking pg_foreign_server {srvfdw} => pg_foreign_data_wrapper {oid}
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NOTICE: checking pg_user_mapping {umuser} => pg_authid {oid}
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NOTICE: checking pg_user_mapping {umserver} => pg_foreign_server {oid}
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NOTICE: checking pg_foreign_table {ftrelid} => pg_class {oid}
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NOTICE: checking pg_foreign_table {ftserver} => pg_foreign_server {oid}
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NOTICE: checking pg_policy {polrelid} => pg_class {oid}
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NOTICE: checking pg_policy {polroles} => pg_authid {oid}
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NOTICE: checking pg_default_acl {defaclrole} => pg_authid {oid}
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NOTICE: checking pg_default_acl {defaclnamespace} => pg_namespace {oid}
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NOTICE: checking pg_init_privs {classoid} => pg_class {oid}
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NOTICE: checking pg_seclabel {classoid} => pg_class {oid}
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NOTICE: checking pg_shseclabel {classoid} => pg_class {oid}
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NOTICE: checking pg_collation {collnamespace} => pg_namespace {oid}
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NOTICE: checking pg_collation {collowner} => pg_authid {oid}
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NOTICE: checking pg_partitioned_table {partrelid} => pg_class {oid}
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NOTICE: checking pg_partitioned_table {partdefid} => pg_class {oid}
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NOTICE: checking pg_partitioned_table {partclass} => pg_opclass {oid}
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NOTICE: checking pg_partitioned_table {partcollation} => pg_collation {oid}
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NOTICE: checking pg_partitioned_table {partrelid,partattrs} => pg_attribute {attrelid,attnum}
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NOTICE: checking pg_range {rngtypid} => pg_type {oid}
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NOTICE: checking pg_range {rngsubtype} => pg_type {oid}
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NOTICE: checking pg_range {rngmultitypid} => pg_type {oid}
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NOTICE: checking pg_range {rngcollation} => pg_collation {oid}
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NOTICE: checking pg_range {rngsubopc} => pg_opclass {oid}
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NOTICE: checking pg_range {rngcanonical} => pg_proc {oid}
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NOTICE: checking pg_range {rngsubdiff} => pg_proc {oid}
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NOTICE: checking pg_transform {trftype} => pg_type {oid}
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NOTICE: checking pg_transform {trflang} => pg_language {oid}
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NOTICE: checking pg_transform {trffromsql} => pg_proc {oid}
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NOTICE: checking pg_transform {trftosql} => pg_proc {oid}
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NOTICE: checking pg_sequence {seqrelid} => pg_class {oid}
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NOTICE: checking pg_sequence {seqtypid} => pg_type {oid}
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NOTICE: checking pg_publication {pubowner} => pg_authid {oid}
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NOTICE: checking pg_publication_rel {prpubid} => pg_publication {oid}
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NOTICE: checking pg_publication_rel {prrelid} => pg_class {oid}
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NOTICE: checking pg_subscription {subdbid} => pg_database {oid}
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NOTICE: checking pg_subscription {subowner} => pg_authid {oid}
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NOTICE: checking pg_subscription_rel {srsubid} => pg_subscription {oid}
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NOTICE: checking pg_subscription_rel {srrelid} => pg_class {oid}
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