MaxCompute中,使用CAST报错。

MaxComputeCAST(substr(sdk_channel,1,1) AS BIGINT) = 1 或 CAST(t.is_client AS BIGINT) = 1 报错: Illegal type cast - in function cp I X Oast, value 'n' cannot2 | 1 8 { be casted from String to Bigint