postgres=# \s\c pagila_\c pagila_dev\df\x\dfselect * from film;\s 3、自动完成（补全）psql支持基于选项卡的自动完成。对于许多命令，您可以使用TAB键来触发自动补全或给出建议。如果您想列出一个表或连接到一个不同的数据库，请从元命令开始，然后开始键入对象名称并按TAB。如果有多个匹配项，psql将提...
另外一个很重要的就是,如果是 upload数据(restore那种)做完之后要记得作analyze(restore自动不给你作的) 当建立新的table的时候,或者给table增加index,或者对table作reindex,或者restore数据进数据库,需要手动跑 analyze才可以。analyze直接影响default_statistics_target数据。 Autovacuum 根据postgres的官方资料,autovacuum在...
if (log_planner_stats) ResetUsage();//记录统计数据 //调用优化器 planner函数 plan = planner(querytree, cursorOptions, boundParams); if (log_planner_stats) ShowUsage("PLANNER STATISTICS"); //返回PlannedStmt结构体plan return plan; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13....
TO { username | GROUP group_name | PUBLIC } [, ...] [ WITH GRANT OPTION ] GRANT { USAGE | ALL [ PRIVILEGES ] } ON LANGUAGE lang_name [, ...] TO { username | GROUP group_name | PUBLIC } [, ...] [ WITH GRANT OPTION ] GRANT { { CREATE | USAGE } [,...] | ALL [ P...
*/ Node *utilityStmt; /* non-null if commandType == CMD_UTILITY */ int resultRelation; /* rtable index of target relation for * INSERT/UPDATE/DELETE; 0 for SELECT */ bool hasAggs; /* has aggregates in tlist or havingQual */ bool hasWindowFuncs; /* has window functions in tlist...
Allow EXPLAIN, auto_explain, autovacuum, and pg_stat_statements to track WAL usage statistics (Kirill Bychik, Julien Rouhaud) EXPLAIN跟踪WAL使用信息 13版本的EXPLAIN命令新增WAL选项,启用后可以跟踪WAL使用信息,此选项的说明如下: WAL Include information on WAL record generation. Specifically, include the...
1.9.1 查询和索引统计信息收集器(Query and Index Statistics Collector) #track_activities = on #track_counts = on #track_io_timing = off #track_functions = none # none, pl, all #track_activity_query_size = 1024 # (change requires restart) #stats_temp_directory = 'pg_stat_tmp' ...
---Query/Index Statistics Collector--- track_activities (boolean) 是否收集每个会话的当前正在执行的命令的统计数据,包括命令开始执行的时间。默认值是on。只有超级用户才能修改这个参数。 track_counts (boolean) 是否收集数据库活动的统计数据。默认值是on。只有超级用户才能修改这个参数。 #...
ALTER INDEX 修改一个索引的定义。 ALTER INDEX name OWNER TO new_owner ALTER INDEX name SET TABLESPACE indexspace_name ALTER INDEX name RENAME TO new_name ALTER LANGUAGE 修改一个过程语言的定义。 ALTER LANGUAGE name RENAME TO new_name ALTER OPERATOR ...
Row Level Security policies can take some effort to set up, and index design must also consider them, but there are cases when it may be essential to do so, such as in a medical records system where it may be a legal requirement to restrict access to patient...