在我们的PostgreSQL SERVER 8.4版中有一个奇怪的SQL。它看起来像一个由PG服务器执行的系统sql!我不知道这个SQL?任何人都知道吗?PostgreSQL的一个非常奇怪的SQL
--Strange SQL
SELECT NULL AS TABLE_CAT,
n.nspname AS TABLE_SCHEM,
c.relname AS TABLE_NAME,
CASE n.nspname ~ '^pg_' OR n.nspname = 'information_schema'
WHEN true THEN
CASE
WHEN n.nspname = 'pg_catalog' OR n.nspname = 'information_schema' THEN
CASE c.relkind
WHEN 'r' THEN 'SYSTEM TABLE'
WHEN 'v' THEN 'SYSTEM VIEW'
WHEN 'i' THEN 'SYSTEM INDEX'
ELSE NULL
END
WHEN n.nspname = 'pg_toast' THEN
CASE c.relkind
WHEN 'r' THEN 'SYSTEM TOAST TABLE'
WHEN 'i' THEN 'SYSTEM TOAST INDEX'
ELSE NULL
END
ELSE
CASE c.relkind
WHEN 'r' THEN 'TEMPORARY TABLE'
WHEN 'i' THEN 'TEMPORARY INDEX'
ELSE NULL
END
END
WHEN false THEN
CASE c.relkind
WHEN 'r' THEN 'TABLE'
WHEN 'i' THEN 'INDEX'
WHEN 'S' THEN 'SEQUENCE'
WHEN 'v' THEN 'VIEW'
ELSE NULL
END
ELSE NULL
END AS TABLE_TYPE,
d.description AS REMARKS
FROM pg_catalog.pg_namespace n,
pg_catalog.pg_class c
LEFT JOIN pg_catalog.pg_description d ON (c.oid = d.objoid
AND d.objsubid = 0)
LEFT JOIN pg_catalog.pg_class dc ON (d.classoid = dc.oid
AND dc.relname='pg_class'
我的眼睛..请在编辑器,以便其可读正确的编码标签进行格式化。 – stefan 2011-03-28 02:17:11
再次发布未格式化的代码,我不会帮忙。如果SO无法解读您的问题,那么SO无法提供帮助。 – 2011-03-28 02:19:04
你是在说查询中的CASE n.nspname〜'^ pg_''吗? – 2011-03-28 02:25:02