trino函数随记

 1.毫秒数根据指定时区转timestamp，并计算时间差

根据毫秒数截取整时起点：毫秒数-毫秒数%(60*60*1000)

根据毫秒数截取整天起点：毫秒数-毫秒数%(24*60*60*1000)

select

pk_day,

from_unixtime(to_unixtime(now()), 'GMT'),

from_unixtime(pk_day / 1000, 'GMT'),

date_diff('day',from_unixtime(pk_day / 1000, 'GMT'),from_unixtime(to_unixtime(now()), 'GMT'))

from (values 1657171485000) as t (pk_day)

2.列转行

SELECT

    CAST(json_extract(myj, '$.chainid') AS      VARCHAR) chainid ,

    CAST(json_extract(myj, '$.project') AS       VARCHAR) project ,

    CAST(json_extract(myj, '$.tokenaddr') AS VARCHAR) tokenaddr ,

    CAST(json_extract(myj, '$.pooladdr') AS  VARCHAR) pooladdr

FROM(

SELECT jsonarray_str,myj FROM( testonly_table CROSS JOIN UNNEST(CAST(json_parse(jsonarray_str) AS array(json))) t (myj))

)