(1 row) postgres=# select * from pg_replication_slots; slot_name | plugin | slot_type | datoid | database | temporary | active | active_pid | xmin | catalog_xmin | restart_lsn | confirmed_flush_lsn | wal_status | safe_wal_size | two_phase ---+---+---+---+---+---+...
-bash-3.2$ LOG: loaded library"$libdir/dbms_pipe"LOG: loaded library"$libdir/edb_gen"LOG: loaded library"$libdir/plugins/plugin_debugger"LOG: loaded library"$libdir/plugins/plugin_spl_debugger"LOG: database system was interrupted; last known up at2012-11-1412:10:38IST LOG: database sys...
1) 配置文件,postgresql.conf,添加:shared_preload_libraries = 'pg_timeout' 2) 两个参数: pg_timeout.naptime: numberofsecondsforthe dedicated backgroud workertosleep between idle session checks (defaultvalueis10seconds) pg_timeout.idle_session_timeout: database session idle timeoutinseconds (defaultva...
LOCALTIMESTAMP SESSION_USER USER 功能 当前数据库 当前用户 当前数据库模式 当前用户 当前时间 当前系统用户 当前用户,与 CURRENT_USER 一致 云数据仓库 PostgreSQL 相关 SQL 语句 SELECT CURRENT_CATALOG; SELECT CURRENT_ROLE; SELECT CURRENT_SCHEMA; SELECT CURRENT_USER; SELECT LOCALTIMESTAMP; SELECT SESSION_...
/* if an advisor plugin is present, let it manage things */ if (ExplainOneQuery_hook) (*ExplainOneQuery_hook) (query, cursorOptions, into, es, queryString, params, queryEnv); else { PlannedStmt *plan; instr_time planstart, planduration; INSTR_TIME_SET_CURRENT(planstart); /* plan the...
(1 row)postgres=# select * from pg_replication_slots;slot_name | plugin | slot_type | datoid | database | temporary | active | active_pid | xmin | catalog_xmin | restart_lsn | confirmed_flush_lsn | wal_status | safe_wal_size | two_phase ---+---+---+---+---+---+--...
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Sometimes, partitioning can be used to eliminate the need to vacuum. If your table holds something like time series data where you basically “insert and forget”, the above is less of a problem. Once the old rows have been frozen, autovacuum will never look at them again (since 9.6, ...
Note:本地源码mvn clean package -Dmaven.test.skip=true构建生成tdengine30writer-0.0.1-SNAPSHOT.jar后,在\datax\plugin\writer下复制tdenginewriter目录,重命名为tdengine30writer,对应修改了其中的plugin.json和plugin_job_template.json,以及libs目录下的taos-jdbcdriver-3.0.2.jar。
SELECT * FROM generate_series(2,4); generate_series --- 2 3 4 (3 rows) SELECT * FROM generate_series('2008-03-01 00:00'::timestamp, '2008-03-04 12:00', '10 hours'); generate_series --- 2008-03-01 00:00:00 2008-03-01 10:00:00 2008-03-01 20:00:00 2008-03-02 06:...