PL/SQL sysdate到Unix纪元的毫秒数 [英] PL/SQL sysdate to Unix epoch time in ms

问题描述

我有一堆Oracle sysdate值，需要将这些值转换为以毫秒为单位的Unix纪元时间.

I have bunch of Oracle sysdate values which need to be converted to Unix epoch time in ms.

例如具有值

15-MAR-13

应转换为

1363351108398

在PL/SQL中

那怎么办?

推荐答案

您可以使用此功能.它还考虑了时区，因为Unix时代是1970-01-01 00:00:00 UTC！

You can use this function. It also considers the time zone, because Unix epoche is 1970-01-01 00:00:00 UTC!

CREATE OR REPLACE FUNCTION GetEpoche(theTimestamp IN TIMESTAMP, timezone IN VARCHAR2 DEFAULT SESSIONTIMEZONE) RETURN NUMBER DETERMINISTIC IS

    timestampUTC TIMESTAMP;
    theInterval INTERVAL DAY(9) TO SECOND;
    epoche NUMBER;
BEGIN

    timestampUTC := FROM_TZ(theTimestamp, timezone) AT TIME ZONE 'UTC';    
    theInterval := TO_DSINTERVAL(timestampUTC - TO_TIMESTAMP('1970-01-01', 'YYYY-MM-DD') );
    epoche := EXTRACT(DAY FROM theInterval)*24*60*60 
        + EXTRACT(HOUR FROM theInterval)*60*60 
        + EXTRACT(MINUTE FROM theInterval)*60 
        + EXTRACT(SECOND FROM theInterval);
    RETURN ROUND(1000*epoche);
END GetEpoche;

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