Global Temporary Table Functions

• pg_get_gtt_relstats(relOid)

  Description: Displays basic information about a global temporary table specified by the current session.

  Parameter: OID of the global temporary table

  Return type: record

  Example:

  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)

  Description: Displays statistics about a single column in a global temporary table specified by the current session.

  Parameter: OID and the attnum attribute of the global temporary table

  Return type: record

  Example:

  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)

  Description: Displays PIDs of all threads that are using the specified global temporary table.

  Parameter: OID of the global temporary table

  Return type: record

  Example:

  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)

  Description: Obtains full SQL information at the instance level.

  Return type: record

  Table 1 dbe_perf.get_global_full_sql_by_timestamp parameter description

  Parameter	Type	Description
  start_timestamp	timestamp	Start point of the SQL start time range.
  end_timestamp	timestamp	End point of the SQL start time range.

• dbe_perf.get_global_slow_sql_by_timestamp(start_timestamp timestamp, end_timestamp timestamp)

  Description: Obtains slow SQL information at the instance level.

  Return type: record

  Table 2 dbe_perf.get_global_slow_sql_by_timestamp parameter description

  Parameter	Type	Description
  start_timestamp	timestamp	Start point of the SQL start time range.
  end_timestamp	timestamp	End point of the SQL start time range.

• statement_detail_decode(detail text, format text, pretty bool)

  Parses the details column in a full or slow SQL statement.

  Table 3 statement_detail_decode parameter description

  Parameter	Type	Description
  detail	text	Set of events generated by the SQL statement (unreadable).
  format	text	Parsing output format. The value is plaintext or json.
  pretty	bool	Whether to display the text in pretty format when format is set to plaintext. The options are as follows: - The value true indicates that events are separated by \n. - The value false indicates that events are separated by commas (,).

• pg_list_gtt_relfrozenxids()

  Description: Displays the frozen XID of each session.

  If the value of pid is 0, the earliest frozen XID of all sessions is displayed.

  Parameter: none

  Return type: record

  Example:

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