</para>
</listitem>
</varlistentry>
+
+ <varlistentry>
+ <term><literal>\dX [ <link linkend="app-psql-patterns"><replaceable class="parameter">pattern</replaceable></link> ]</literal></term>
+ <listitem>
+ <para>
+ Lists extended statistics.
+ If <replaceable class="parameter">pattern</replaceable>
+ is specified, only those extended statistics whose names match the
+ pattern are listed.
+ If <literal>+</literal> is appended to the command name, each extended
+ statistics is listed with its size.
+ </para>
+
+ <para>
+ The column of the kind of extended stats (e.g. Ndistinct) shows some statuses.
+ "requested" means that it needs to collect statistics by <link
+ linkend="sql-analyze"><command>ANALYZE</command></link>.
+ "built" means <link linkend="sql-analyze"><command>ANALYZE</command></link> was
+ finished, and the planner can use it. NULL means that it doesn't exists.
+ </para>
+ </listitem>
+ </varlistentry>
<varlistentry>
<term><literal>\dy[+] [ <link linkend="app-psql-patterns"><replaceable class="parameter">pattern</replaceable></link> ]</literal></term>
else
success = listExtensions(pattern);
break;
+ case 'X': /* Extended Statistics */
+ success = listExtendedStats(pattern, show_verbose);
+ break;
case 'y': /* Event Triggers */
success = listEventTriggers(pattern, show_verbose);
break;
return true;
}
+/*
+ * \dX
+ *
+ * Describes extended statistics.
+ */
+bool
+listExtendedStats(const char *pattern, bool verbose)
+{
+ PQExpBufferData buf;
+ PGresult *res;
+ printQueryOpt myopt = pset.popt;
+
+ if (pset.sversion < 100000)
+ {
+ char sverbuf[32];
+
+ pg_log_error("The server (version %s) does not support extended statistics.",
+ formatPGVersionNumber(pset.sversion, false,
+ sverbuf, sizeof(sverbuf)));
+ return true;
+ }
+
+ initPQExpBuffer(&buf);
+ printfPQExpBuffer(&buf,
+ "SELECT \n"
+ "es.stxnamespace::pg_catalog.regnamespace::text AS \"%s\", \n"
+ "es.stxname AS \"%s\", \n"
+ "pg_catalog.format('%%s FROM %%s', \n"
+ " (SELECT pg_catalog.string_agg(pg_catalog.quote_ident(a.attname),', ') \n"
+ " FROM pg_catalog.unnest(es.stxkeys) s(attnum) \n"
+ " JOIN pg_catalog.pg_attribute a \n"
+ " ON (es.stxrelid = a.attrelid \n"
+ " AND a.attnum = s.attnum \n"
+ " AND NOT a.attisdropped)), \n"
+ "es.stxrelid::regclass) AS \"%s\"",
+ gettext_noop("Schema"),
+ gettext_noop("Name"),
+ gettext_noop("Definition"));
+
+ /*
+ * Since 12 there are two catalogs - one for the definition, one for the
+ * data built by ANALYZE. Older releases use a single catalog. Also, 12
+ * adds the MCV statistics kind.
+ */
+ if (pset.sversion < 120000)
+ {
+ appendPQExpBuffer(&buf,
+ ",\nCASE WHEN es.stxndistinct IS NOT NULL THEN 'built' \n"
+ " WHEN 'd' = any(es.stxkind) THEN 'requested' \n"
+ "END AS \"%s\", \n"
+ "CASE WHEN es.stxdependencies IS NOT NULL THEN 'built' \n"
+ " WHEN 'f' = any(es.stxkind) THEN 'requested' \n"
+ "END AS \"%s\"",
+ gettext_noop("Ndistinct"),
+ gettext_noop("Dependencies"));
+ }
+ else
+ {
+ appendPQExpBuffer(&buf,
+ ",\nCASE WHEN esd.stxdndistinct IS NOT NULL THEN 'built' \n"
+ " WHEN 'd' = any(es.stxkind) THEN 'requested' \n"
+ "END AS \"%s\", \n"
+ "CASE WHEN esd.stxddependencies IS NOT NULL THEN 'built' \n"
+ " WHEN 'f' = any(es.stxkind) THEN 'requested' \n"
+ "END AS \"%s\", \n"
+ "CASE WHEN esd.stxdmcv IS NOT NULL THEN 'built' \n"
+ " WHEN 'm' = any(es.stxkind) THEN 'requested' \n"
+ "END AS \"%s\"",
+ gettext_noop("Ndistinct"),
+ gettext_noop("Dependencies"),
+ gettext_noop("MCV"));
+ }
+
+ /* In verbose mode, print sizes of the extended statistics objects. */
+ if (verbose)
+ {
+ if (pset.sversion < 120000)
+ {
+ appendPQExpBuffer(&buf,
+ ",\nCASE WHEN es.stxndistinct IS NOT NULL THEN \n"
+ " pg_catalog.pg_size_pretty(pg_catalog.length(es.stxndistinct)::bigint) \n"
+ " WHEN 'd' = any(es.stxkind) THEN '0 bytes' \n"
+ "END AS \"%s\", \n"
+ "CASE WHEN es.stxdependencies IS NOT NULL THEN \n"
+ " pg_catalog.pg_size_pretty(pg_catalog.length(es.stxdependencies)::bigint) \n"
+ " WHEN 'f' = any(es.stxkind) THEN '0 bytes' \n"
+ "END AS \"%s\"",
+ gettext_noop("Ndistinct_size"),
+ gettext_noop("Dependencies_size"));
+ }
+ else
+ {
+ appendPQExpBuffer(&buf,
+ ",\nCASE WHEN esd.stxdndistinct IS NOT NULL THEN \n"
+ " pg_catalog.pg_size_pretty(pg_catalog.length(esd.stxdndistinct)::bigint) \n"
+ " WHEN 'd' = any(es.stxkind) THEN '0 bytes' \n"
+ "END AS \"%s\", \n"
+ "CASE WHEN esd.stxddependencies IS NOT NULL THEN \n"
+ " pg_catalog.pg_size_pretty(pg_catalog.length(esd.stxddependencies)::bigint) \n"
+ " WHEN 'f' = any(es.stxkind) THEN '0 bytes' \n"
+ "END AS \"%s\", \n"
+ "CASE WHEN esd.stxdmcv IS NOT NULL THEN \n"
+ " pg_catalog.pg_size_pretty(pg_catalog.length(esd.stxdmcv)::bigint) \n"
+ " WHEN 'm' = any(es.stxkind) THEN '0 bytes' \n"
+ "END AS \"%s\"",
+ gettext_noop("Ndistinct_size"),
+ gettext_noop("Dependencies_size"),
+ gettext_noop("MCV_size"));
+ }
+ }
+
+ if (pset.sversion < 120000)
+ {
+ appendPQExpBufferStr(&buf,
+ " \nFROM pg_catalog.pg_statistic_ext es \n"
+ "INNER JOIN pg_catalog.pg_class c \n"
+ "ON es.stxrelid = c.oid \n");
+ }
+ else
+ {
+ appendPQExpBufferStr(&buf,
+ " \nFROM pg_catalog.pg_statistic_ext es \n"
+ "LEFT JOIN pg_catalog.pg_statistic_ext_data esd \n"
+ "ON es.oid = esd.stxoid \n"
+ "INNER JOIN pg_catalog.pg_class c \n"
+ "ON es.stxrelid = c.oid \n");
+ }
+
+ processSQLNamePattern(pset.db, &buf, pattern, false,
+ false, NULL,
+ "es.stxname", NULL,
+ NULL);
+
+ appendPQExpBufferStr(&buf, "ORDER BY 1, 2;");
+
+ res = PSQLexec(buf.data);
+ termPQExpBuffer(&buf);
+ if (!res)
+ return false;
+
+ myopt.nullPrint = NULL;
+ myopt.title = _("List of extended statistics");
+ myopt.translate_header = true;
+
+ printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
+
+ PQclear(res);
+ return true;
+}
+
/*
* \dC
*
/* \dx+ */
extern bool listExtensionContents(const char *pattern);
+/* \dX */
+extern bool listExtendedStats(const char *pattern, bool verbose);
+
/* \dy */
extern bool listEventTriggers(const char *pattern, bool verbose);
fprintf(output, _(" \\du[S+] [PATTERN] list roles\n"));
fprintf(output, _(" \\dv[S+] [PATTERN] list views\n"));
fprintf(output, _(" \\dx[+] [PATTERN] list extensions\n"));
+ fprintf(output, _(" \\dX[+] [PATTERN] list extended statistics\n"));
fprintf(output, _(" \\dy [PATTERN] list event triggers\n"));
fprintf(output, _(" \\l[+] [PATTERN] list databases\n"));
fprintf(output, _(" \\sf[+] FUNCNAME show a function's definition\n"));
"\\dF", "\\dFd", "\\dFp", "\\dFt", "\\dg", "\\di", "\\dl", "\\dL",
"\\dm", "\\dn", "\\do", "\\dO", "\\dp", "\\dP", "\\dPi", "\\dPt",
"\\drds", "\\dRs", "\\dRp", "\\ds", "\\dS",
- "\\dt", "\\dT", "\\dv", "\\du", "\\dx", "\\dy",
+ "\\dt", "\\dT", "\\dv", "\\du", "\\dx", "\\dX", "\\dy",
"\\e", "\\echo", "\\ef", "\\elif", "\\else", "\\encoding",
"\\endif", "\\errverbose", "\\ev",
"\\f",
COMPLETE_WITH_SCHEMA_QUERY(Query_for_list_of_views, NULL);
else if (TailMatchesCS("\\dx*"))
COMPLETE_WITH_QUERY(Query_for_list_of_extensions);
+ else if (TailMatchesCS("\\dX*"))
+ COMPLETE_WITH_SCHEMA_QUERY(Query_for_list_of_statistics, NULL);
else if (TailMatchesCS("\\dm*"))
COMPLETE_WITH_SCHEMA_QUERY(Query_for_list_of_matviews, NULL);
else if (TailMatchesCS("\\dE*"))
CREATE STATISTICS tststats.priv_test_stats (mcv) ON a, b
FROM tststats.priv_test_tbl;
ANALYZE tststats.priv_test_tbl;
+-- Check printing info about extended statistics by \dX
+create table stts_t1 (a int, b int);
+create statistics stts_1 (ndistinct) on a, b from stts_t1;
+create statistics stts_2 (ndistinct, dependencies) on a, b from stts_t1;
+create statistics stts_3 (ndistinct, dependencies, mcv) on a, b from stts_t1;
+create table stts_t2 (a int, b int, c int);
+create statistics stts_4 on b, c from stts_t2;
+create table stts_t3 (col1 int, col2 int, col3 int);
+create statistics stts_hoge on col1, col2, col3 from stts_t3;
+create schema stts_s1;
+create schema stts_s2;
+create statistics stts_s1.stts_foo on col1, col2 from stts_t3;
+create statistics stts_s2.stts_yama (dependencies, mcv) on col1, col3 from stts_t3;
+insert into stts_t1 select i,i from generate_series(1,100) i;
+analyze stts_t1;
+\dX
+ List of extended statistics
+ Schema | Name | Definition | Ndistinct | Dependencies | MCV
+----------+------------------------+--------------------------------------+-----------+--------------+-----------
+ public | func_deps_stat | a, b, c FROM functional_dependencies | | built |
+ public | mcv_lists_arrays_stats | a, b, c FROM mcv_lists_arrays | | | built
+ public | mcv_lists_bool_stats | a, b, c FROM mcv_lists_bool | | | built
+ public | mcv_lists_stats | a, b, d FROM mcv_lists | | | built
+ public | stts_1 | a, b FROM stts_t1 | built | |
+ public | stts_2 | a, b FROM stts_t1 | built | built |
+ public | stts_3 | a, b FROM stts_t1 | built | built | built
+ public | stts_4 | b, c FROM stts_t2 | requested | requested | requested
+ public | stts_hoge | col1, col2, col3 FROM stts_t3 | requested | requested | requested
+ stts_s1 | stts_foo | col1, col2 FROM stts_t3 | requested | requested | requested
+ stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | requested | requested
+ tststats | priv_test_stats | a, b FROM tststats.priv_test_tbl | | | built
+(12 rows)
+
+\dX stts_?
+ List of extended statistics
+ Schema | Name | Definition | Ndistinct | Dependencies | MCV
+--------+--------+-------------------+-----------+--------------+-----------
+ public | stts_1 | a, b FROM stts_t1 | built | |
+ public | stts_2 | a, b FROM stts_t1 | built | built |
+ public | stts_3 | a, b FROM stts_t1 | built | built | built
+ public | stts_4 | b, c FROM stts_t2 | requested | requested | requested
+(4 rows)
+
+\dX *stts_hoge
+ List of extended statistics
+ Schema | Name | Definition | Ndistinct | Dependencies | MCV
+--------+-----------+-------------------------------+-----------+--------------+-----------
+ public | stts_hoge | col1, col2, col3 FROM stts_t3 | requested | requested | requested
+(1 row)
+
+\dX+
+ List of extended statistics
+ Schema | Name | Definition | Ndistinct | Dependencies | MCV | Ndistinct_size | Dependencies_size | MCV_size
+----------+------------------------+--------------------------------------+-----------+--------------+-----------+----------------+-------------------+------------
+ public | func_deps_stat | a, b, c FROM functional_dependencies | | built | | | 106 bytes |
+ public | mcv_lists_arrays_stats | a, b, c FROM mcv_lists_arrays | | | built | | | 24 kB
+ public | mcv_lists_bool_stats | a, b, c FROM mcv_lists_bool | | | built | | | 386 bytes
+ public | mcv_lists_stats | a, b, d FROM mcv_lists | | | built | | | 294 bytes
+ public | stts_1 | a, b FROM stts_t1 | built | | | 13 bytes | |
+ public | stts_2 | a, b FROM stts_t1 | built | built | | 13 bytes | 40 bytes |
+ public | stts_3 | a, b FROM stts_t1 | built | built | built | 13 bytes | 40 bytes | 6126 bytes
+ public | stts_4 | b, c FROM stts_t2 | requested | requested | requested | 0 bytes | 0 bytes | 0 bytes
+ public | stts_hoge | col1, col2, col3 FROM stts_t3 | requested | requested | requested | 0 bytes | 0 bytes | 0 bytes
+ stts_s1 | stts_foo | col1, col2 FROM stts_t3 | requested | requested | requested | 0 bytes | 0 bytes | 0 bytes
+ stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | requested | requested | | 0 bytes | 0 bytes
+ tststats | priv_test_stats | a, b FROM tststats.priv_test_tbl | | | built | | | 686 bytes
+(12 rows)
+
+\dX+ stts_?
+ List of extended statistics
+ Schema | Name | Definition | Ndistinct | Dependencies | MCV | Ndistinct_size | Dependencies_size | MCV_size
+--------+--------+-------------------+-----------+--------------+-----------+----------------+-------------------+------------
+ public | stts_1 | a, b FROM stts_t1 | built | | | 13 bytes | |
+ public | stts_2 | a, b FROM stts_t1 | built | built | | 13 bytes | 40 bytes |
+ public | stts_3 | a, b FROM stts_t1 | built | built | built | 13 bytes | 40 bytes | 6126 bytes
+ public | stts_4 | b, c FROM stts_t2 | requested | requested | requested | 0 bytes | 0 bytes | 0 bytes
+(4 rows)
+
+\dX+ *stts_hoge
+ List of extended statistics
+ Schema | Name | Definition | Ndistinct | Dependencies | MCV | Ndistinct_size | Dependencies_size | MCV_size
+--------+-----------+-------------------------------+-----------+--------------+-----------+----------------+-------------------+----------
+ public | stts_hoge | col1, col2, col3 FROM stts_t3 | requested | requested | requested | 0 bytes | 0 bytes | 0 bytes
+(1 row)
+
+\dX+ stts_s2.stts_yama
+ List of extended statistics
+ Schema | Name | Definition | Ndistinct | Dependencies | MCV | Ndistinct_size | Dependencies_size | MCV_size
+---------+-----------+-------------------------+-----------+--------------+-----------+----------------+-------------------+----------
+ stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | requested | requested | | 0 bytes | 0 bytes
+(1 row)
+
+drop table stts_t1, stts_t2, stts_t3;
+drop schema stts_s1, stts_s2 cascade;
-- User with no access
CREATE USER regress_stats_user1;
GRANT USAGE ON SCHEMA tststats TO regress_stats_user1;
ANALYZE tststats.priv_test_tbl;
+-- Check printing info about extended statistics by \dX
+create table stts_t1 (a int, b int);
+create statistics stts_1 (ndistinct) on a, b from stts_t1;
+create statistics stts_2 (ndistinct, dependencies) on a, b from stts_t1;
+create statistics stts_3 (ndistinct, dependencies, mcv) on a, b from stts_t1;
+
+create table stts_t2 (a int, b int, c int);
+create statistics stts_4 on b, c from stts_t2;
+
+create table stts_t3 (col1 int, col2 int, col3 int);
+create statistics stts_hoge on col1, col2, col3 from stts_t3;
+
+create schema stts_s1;
+create schema stts_s2;
+create statistics stts_s1.stts_foo on col1, col2 from stts_t3;
+create statistics stts_s2.stts_yama (dependencies, mcv) on col1, col3 from stts_t3;
+
+insert into stts_t1 select i,i from generate_series(1,100) i;
+analyze stts_t1;
+
+\dX
+\dX stts_?
+\dX *stts_hoge
+\dX+
+\dX+ stts_?
+\dX+ *stts_hoge
+\dX+ stts_s2.stts_yama
+
+drop table stts_t1, stts_t2, stts_t3;
+drop schema stts_s1, stts_s2 cascade;
+
-- User with no access
CREATE USER regress_stats_user1;
GRANT USAGE ON SCHEMA tststats TO regress_stats_user1;
projects / postgresql.git / commitdiff