更新时间：2022-04-24 GMT+08:00
PG_CATALOG
- PG_CATALOG.shufflemasking(col text)
PG_CATALOG.shufflemasking(col text)函数原型为：
pg_catalog.shufflemasking(col text) RETURNS text AS $$ declare value text := reverse(col); size INTEGER := length(col); begin return reverse(reverse(left(value, size/2)) || reverse(right(value, size/2))); end; $$ LANGUAGE plpgsql;表1 参数
描述
col
待混肴的文本
- PG_CATALOG.signal_backend(bigint, integer)
PG_CATALOG.signal_backend(bigint, integer)函数原型为：
pg_catalog.signal_backend(bigint, integer) RETURNS boolean LANGUAGE internal STRICT NOT FENCED NOT SHIPPABLE AS 'signal_backend';
父主题： 基础接口
