diff options
Diffstat (limited to 'src/bin/psql/describe.c')
| -rw-r--r-- | src/bin/psql/describe.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c index caf97563f48..c2051ee8207 100644 --- a/src/bin/psql/describe.c +++ b/src/bin/psql/describe.c @@ -4393,6 +4393,156 @@ listEventTriggers(const char *pattern, bool verbose) } /* + * \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 * * Describes casts. |