问将火花current_timestamp值推送到带有时区列的postgres时间戳EN最近项目上需要用到时间戳，查找了资源终于找到了实现方式，最后时间戳还需要转换成具体的日期格式，查阅了一些资料，还是没有找到具体的实现方式，所以这里总结一些，防止其他小伙伴就掉坑，实现是在freeRTOS系统上的，当前我在linux下尝试实现以下。
*/ MemSet(&CheckpointStats, 0, sizeof(CheckpointStats)); CheckpointStats.ckpt_start_t = GetCurrentTimestamp(); /* * Let smgr prepare for checkpoint; this has to happen outside the * critical section and before we determine the REDO pointer. Note that * smgr must not do anything that'd...
CURRENT_TIME(precision) CURRENT_TIMESTAMP(precision) 还记得上面说的特殊值now吗,实际上跟CURRENT_TIMESTAMP一样: Copy //下面三个完全相等SELECTCURRENT_TIMESTAMP;SELECTTIMESTAMP'now';SELECTnow(); # (2)不带时区信息# LOCALTIME LOCALTIMESTAMP LOCALTIME(precision) LOCALTIMESTAMP(precision) 仅Date 没有时...
age(timestamp) interval 从current_date减去得到的数值 age(timestamp '1957-06-13') 43 years 8 mons 3 days current_date date 今天的日期 current_time time 现在的时间 current_timestamp timestamp 日期和时间 date_part(text, timestamp) double 获取子域(等效于extract) date...
SQL>create table timezone_test(t0 timestamp,t1 timestamp with time zone,t2 timestamp with local time zone); Table created. SQL>insert into timezone_test select current_timestamp,current_timestamp,current_timestamp from dual; 1 row created. ...
1、创建默认时间: datetime default getdate() 1. Oracle: 1、创建默认时间:date default sysdate 1. MySql: 1、创建默认时间: datetime NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间' ; 1. PostgreSql: 1、创建默认时间:datetime varchar(40) DEFAULT (now()) ...
5. INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP); 6. UPDATE pgbench_accounts SET abalance = abalance + $1 WHERE aid = $2; 7. END; 测试的时候,N从32增大到768,取TPS。结果如下: ...
(pgstat_fetch_stat_bgwriter()->buf_alloc); } Datum pg_stat_get_bgwriter_stat_reset_time(PG_FUNCTION_ARGS) { PG_RETURN_TIMESTAMPTZ(pgstat_fetch_stat_bgwriter()->stat_reset_timestamp); } 还有一个select * from pg_stat_bgwriter ;可以看下这个视图的定义,它的信息综合了bgwriter,checkpointer,...
pg_replication:query: "SELECT CASE WHEN NOT pg_is_in_recovery() THEN 0 ELSE GREATEST (0, EXTRACT(EPOCH FROM (now() - pg_last_xact_replay_timestamp())) END AS lag"master: truemetrics:- lag:usage: "GAUGE"description: "Replication lag behind master in seconds"pg_postmaster:query: "SELEC...
go get github.com/lib/pq Features SSL Handles bad connections for database/sql Scan time.Time correctly (i.e. timestamp[tz], time[tz], date) Scan binary blobs correctly (i.e. bytea) Package for hstore support COPY FROM support pq.ParseURL for converting urls to connection strings for...