GBase 8c 全局临时表函数（一）

l 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:

 gbase=# select * from pg_get_gtt_relstats(74069);

 relfilenode | relpages | reltuples | relallvisible | relfrozenxid | relminmxid

-------------+----------+-----------+---------------+--------------+------------

       74069 |       58 |     13000 |             0 |        11151 |          0

(1 row)

l 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:

 gbase=# 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)