我正在进行以下deploy
更改。将timestamp
列的值更改为timestamptz
。
-- Alter the is_deleted flags to be timestamp with time zone
alter table source_meta.sources alter column is_deleted set data type timestamptz
using
is_deleted at time zone 'UTC';
alter table source_meta.series alter column is_deleted set data type timestamptz
using
is_deleted at time zone 'UTC';
如何编写verify
脚本,如果未更改数据类型,该脚本将出错?
还需要revert
方面的帮助,以将时区从时间戳删除。
答案 0 :(得分:2)
您的解决方案对我来说非常好,@ nackjicholson。如果您想获得更多信息,可以将其包装在DO
块中并引发错误:
DO $$
BEGIN
PERFORM TRUE
FROM information_schema.columns
WHERE table_name. = 'sources'
AND column_name = 'is_deleted'
AND data_type = 'timestamp with time zone';
IF NOT FOUND THEN
RAISE EXCEPTION 'sources.is_deleted type is not timestamptz';
END IF;
END;
$$;
答案 1 :(得分:1)
SELECT 1/count(*)
FROM information_schema.columns
WHERE table_name = 'sources'
and column_name = 'is_deleted'
and data_type = 'timestamp with time zone';
这就是我能想到的,但不是专家,我不确定这是做到这一点还是愚蠢。 :)
如果未找到符合该条件的行,则会抛出除以零的错误。