From 289b425db32d739a2c0609f1b4b8fca1b465fac2 Mon Sep 17 00:00:00 2001 From: Tomas Vondra Date: Thu, 6 Jun 2019 18:40:50 +0200 Subject: [PATCH 3/3] add pg_stats_ext view --- src/backend/catalog/system_views.sql | 41 ++++++++++++++++++++++++++++ src/test/regress/expected/rules.out | 29 ++++++++++++++++++++ 2 files changed, 70 insertions(+) diff --git a/src/backend/catalog/system_views.sql b/src/backend/catalog/system_views.sql index 78a103cdb9..5bcf24ee84 100644 --- a/src/backend/catalog/system_views.sql +++ b/src/backend/catalog/system_views.sql @@ -253,6 +253,47 @@ CREATE VIEW pg_stats WITH (security_barrier) AS REVOKE ALL on pg_statistic FROM public; +CREATE VIEW pg_stats_ext WITH (security_barrier) AS + SELECT cn.nspname AS schemaname, + c.relname AS tablename, + sn.nspname AS statistics_schemaname, + s.stxname AS statistics_name, + pg_get_userbyid(c.relowner) AS statistics_owner, + ( SELECT array_agg(a.attname ORDER BY a.attnum) + FROM unnest(s.stxkeys) k + JOIN pg_attribute a + ON (a.attrelid = s.stxrelid AND a.attnum = k) + ) AS attnames, + s.stxkind AS kinds, + sd.stxndistinct AS n_distinct, + sd.stxdependencies AS dependencies, + m.most_common_vals, + m.most_common_val_nulls, + m.most_common_freqs, + m.most_common_base_freqs + FROM pg_statistic_ext s JOIN pg_class c ON (c.oid = s.stxrelid) + JOIN pg_statistic_ext_data sd ON (s.oid = sd.stxoid) + LEFT JOIN pg_namespace cn ON (cn.oid = c.relnamespace) + LEFT JOIN pg_namespace sn ON (sn.oid = s.stxnamespace) + LEFT JOIN LATERAL + ( SELECT array_agg(values) AS most_common_vals, + array_agg(nulls) AS most_common_val_nulls, + array_agg(frequency) AS most_common_freqs, + array_agg(base_frequency) AS most_common_base_freqs + FROM pg_mcv_list_items(sd.stxmcv) + ) m ON sd.stxmcv IS NOT NULL + WHERE NOT EXISTS + ( SELECT 1 + FROM unnest(stxkeys) k + JOIN pg_attribute a + ON (a.attrelid = s.stxrelid AND a.attnum = k) + WHERE NOT has_column_privilege(c.oid, a.attnum, 'select') ) + AND (c.relrowsecurity = false OR NOT row_security_active(c.oid)); + +REVOKE ALL on pg_statistic_ext FROM public; +GRANT SELECT (oid, stxrelid, stxname, stxnamespace, stxowner, stxkeys, stxkind) + ON pg_statistic_ext TO public; + CREATE VIEW pg_publication_tables AS SELECT P.pubname AS pubname, diff --git a/src/test/regress/expected/rules.out b/src/test/regress/expected/rules.out index 7d365c48d1..80faf46648 100644 --- a/src/test/regress/expected/rules.out +++ b/src/test/regress/expected/rules.out @@ -2284,6 +2284,35 @@ pg_stats| SELECT n.nspname AS schemaname, JOIN pg_attribute a ON (((c.oid = a.attrelid) AND (a.attnum = s.staattnum)))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE ((NOT a.attisdropped) AND has_column_privilege(c.oid, a.attnum, 'select'::text) AND ((c.relrowsecurity = false) OR (NOT row_security_active(c.oid)))); +pg_stats_ext| SELECT cn.nspname AS schemaname, + c.relname AS tablename, + sn.nspname AS statistics_schemaname, + s.stxname AS statistics_name, + pg_get_userbyid(c.relowner) AS statistics_owner, + ( SELECT array_agg(a.attname ORDER BY a.attnum) AS array_agg + FROM (unnest(s.stxkeys) k(k) + JOIN pg_attribute a ON (((a.attrelid = s.stxrelid) AND (a.attnum = k.k))))) AS attnames, + s.stxkind AS kinds, + sd.stxndistinct AS n_distinct, + sd.stxdependencies AS dependencies, + m.most_common_vals, + m.most_common_val_nulls, + m.most_common_freqs, + m.most_common_base_freqs + FROM (((((pg_statistic_ext s + JOIN pg_class c ON ((c.oid = s.stxrelid))) + JOIN pg_statistic_ext_data sd ON ((s.oid = sd.stxoid))) + LEFT JOIN pg_namespace cn ON ((cn.oid = c.relnamespace))) + LEFT JOIN pg_namespace sn ON ((sn.oid = s.stxnamespace))) + LEFT JOIN LATERAL ( SELECT array_agg(pg_mcv_list_items."values") AS most_common_vals, + array_agg(pg_mcv_list_items.nulls) AS most_common_val_nulls, + array_agg(pg_mcv_list_items.frequency) AS most_common_freqs, + array_agg(pg_mcv_list_items.base_frequency) AS most_common_base_freqs + FROM pg_mcv_list_items(sd.stxmcv) pg_mcv_list_items(index, "values", nulls, frequency, base_frequency)) m ON ((sd.stxmcv IS NOT NULL))) + WHERE ((NOT (EXISTS ( SELECT 1 + FROM (unnest(s.stxkeys) k(k) + JOIN pg_attribute a ON (((a.attrelid = s.stxrelid) AND (a.attnum = k.k)))) + WHERE (NOT has_column_privilege(c.oid, a.attnum, 'select'::text))))) AND ((c.relrowsecurity = false) OR (NOT row_security_active(c.oid)))); pg_tables| SELECT n.nspname AS schemaname, c.relname AS tablename, pg_get_userbyid(c.relowner) AS tableowner, -- 2.20.1