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Tom Lane
0e5e167aae
Collect and use element-frequency statistics for arrays. ...
This patch improves selectivity estimation for the array <@, &&, and @>
(containment and overlaps) operators. It enables collection of statistics
about individual array element values by ANALYZE, and introduces
operator-specific estimators that use these stats. In addition,
ScalarArrayOpExpr constructs of the forms "const = ANY/ALL (array_column)"
and "const <> ANY/ALL (array_column)" are estimated by treating them as
variants of the containment operators.
Since we still collect scalar-style stats about the array values as a
whole, the pg_stats view is expanded to show both these stats and the
array-style stats in separate columns. This creates an incompatible change
in how stats for tsvector columns are displayed in pg_stats: the stats
about lexemes are now displayed in the array-related columns instead of the
original scalar-related columns.
There are a few loose ends here, notably that it'd be nice to be able to
suppress either the scalar-style stats or the array-element stats for
columns for which they're not useful. But the patch is in good enough
shape to commit for wider testing.
Alexander Korotkov, reviewed by Noah Misch and Nathan Boley
14 years ago
..
Makefile
Collect and use element-frequency statistics for arrays.
14 years ago
acl.c
Show default privileges in information schema
14 years ago
array_selfuncs.c
Collect and use element-frequency statistics for arrays.
14 years ago
array_typanalyze.c
Collect and use element-frequency statistics for arrays.
14 years ago
array_userfuncs.c
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arrayfuncs.c
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arrayutils.c
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ascii.c
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bool.c
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14 years ago
cash.c
Support more locale-specific formatting options in cash_out().
14 years ago
char.c
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14 years ago
date.c
Add transform functions for various temporal typmod coercisions.
14 years ago
datetime.c
Add transform functions for various temporal typmod coercisions.
14 years ago
datum.c
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dbsize.c
Make pg_relation_size() and friends return NULL if the object doesn't exist.
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domains.c
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encode.c
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enum.c
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float.c
Add some enumeration commas, for consistency
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format_type.c
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formatting.c
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genfile.c
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geo_ops.c
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geo_selfuncs.c
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inet_cidr_ntop.c
When reporting the server as not responding, if the hostname was
15 years ago
inet_net_pton.c
Add C comment about needed include.
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int.c
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int8.c
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json.c
Correctly handle NULLs in JSON output.
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like.c
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like_match.c
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lockfuncs.c
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mac.c
Add bitwise AND, OR, and NOT operators for macaddr data type.
14 years ago
misc.c
Add COLLATION FOR expression
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nabstime.c
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name.c
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network.c
Revert the behavior of inet/cidr functions to not unpack the arguments.
14 years ago
numeric.c
Add some enumeration commas, for consistency
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numutils.c
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oid.c
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oracle_compat.c
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pg_locale.c
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pg_lzcompress.c
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pgstatfuncs.c
Add deadlock counter to pg_stat_database
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pseudotypes.c
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quote.c
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rangetypes.c
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regproc.c
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ri_triggers.c
ALTER TABLE: skip FK validation when it's safe to do so
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rowtypes.c
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14 years ago
ruleutils.c
Improve pretty printing of viewdefs.
14 years ago
selfuncs.c
Collect and use element-frequency statistics for arrays.
14 years ago
tid.c
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14 years ago
timestamp.c
Add a comment to AdjustIntervalForTypmod to reduce chance of future bugs.
14 years ago
trigfuncs.c
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14 years ago
tsginidx.c
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tsgistidx.c
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tsquery.c
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tsquery_cleanup.c
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tsquery_gist.c
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tsquery_op.c
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tsquery_rewrite.c
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14 years ago
tsquery_util.c
Add const qualifiers where they are accidentally cast away
14 years ago
tsrank.c
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tsvector.c
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tsvector_op.c
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tsvector_parser.c
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txid.c
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uuid.c
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14 years ago
varbit.c
Add a transform function for varbit typmod coercisions.
14 years ago
varchar.c
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varlena.c
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version.c
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windowfuncs.c
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xid.c
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14 years ago
xml.c
Add const qualifiers where they are accidentally cast away
14 years ago
Tom Lane
0e5e167aae