MogDB 全局临时表函数

pg_get_gtt_relstats(relOid)

描述: 显示当前会话指定的全局临时表的基本信息。

参数: 全局临时表的OID。

返回值类型: record

示例:

mogdb=# select * from pg_get_gtt_relstats(74069);
 relfilenode | relpages | reltuples | relallvisible | relfrozenxid | relminmxid
-------------+----------+-----------+---------------+--------------+------------
       74069 |       58 |     13000 |             0 |        11151 |          0
(1 row)

pg_get_gtt_statistics(relOid, attnum, "::text)

描述: 显示当前会话指定的全局临时表的单列统计信息。

参数: 全局临时表的OID和属性attnum。

返回值类型: record

示例:

mogdb=# select * from pg_get_gtt_statistics(74069,1,''::text);
 starelid | starelkind | staattnum | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stanumbers1 | stanumbers2 | stanumbers3 | stanu
mbers4 | stanumbers5 |
                                          stavalues1
                                                                        | stavalues2 | stavalues3 | stavalues4 | stavalues5 | stadndistinct | staextinfo
----------+------------+-----------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+-------------+-------------+-------------+------
-------+-------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------+------------+------------+------------+------------+---------------+------------
    74069 | c          |         1 | f          |           0 |        4 |          -1 |        2 |        3 |        0 |        0 |        0 |     97 |     97 |      0 |      0 |      0 |             | {1}         |             |
       |             | {1,130,260,390,520,650,780,910,1040,1170,1300,1430,1560,1690,1820,1950,2080,2210,2340,2470,2600,2730,2860,2990,3120,3250,3380,3510,3640,3770,3900,4030,4160,4290,4420,4550,4680,4810,4940,5070,5200,5330,5460,5590,57
20,5850,5980,6110,6240,6370,6500,6630,6760,6890,7020,7150,7280,7410,7540,7670,7800,7930,8060,8190,8320,8450,8580,8710,8840,8970,9100,9230,9360,9490,9620,9750,9880,10010,10140,10270,10400,10530,10660,10790,10920,11050,11180,11310,11440,1
1570,11700,11830,11960,12090,12220,12350,12480,12610,12740,12870,13000} |            |            |            |            |             0 |
(1 row)

pg_gtt_attached_pid(relOid)

描述: 显示正在使用指定全局临时表的所有线程pid。

参数: 全局临时表的OID。

返回值类型: record

示例:

mogdb=# select * from pg_gtt_attached_pid(74069);
 relid |       pid
-------+-----------------
 74069 | 139648170456832
 74069 | 139648123270912
(2 rows)

dbe_perf.get_global_full_sql_by_timestamp(start_timestamp timestamp, end_timestamp timestamp)

描述: 获取实例级的所有SQL信息。

返回值类型: record

表1 dbe_perf.get_global_full_sql_by_timestamp参数描述

dbe_perf.get_global_slow_sql_by_timestamp(start_timestamp timestamp, end_timestamp timestamp)

描述: 获取实例级慢SQL信息。

返回值类型: record

表2 dbe_perf.get_global_slow_sql_by_timestamp参数描述

statement_detail_decode(detail text, format text, pretty bool)

解析全/慢SQL语句中的详情列。

表3 statement_detail_decode参数描述

pg_list_gtt_relfrozenxids()

描述: 显示各会话的冻结事务xid。

pid=0的行，显示所有会话中最老的冻结事务xid。

参数: 无。

返回值类型: record

示例:

mogdb=# select * from pg_list_gtt_relfrozenxids();
       pid       | relfrozenxid
-----------------+--------------
 139648123270912 |        11151
 139648170456832 |        11155
               0 |        11151
(3 rows)