support union operation that merges based on column names ---------------------------------------------------------
Key: PIG-1461 URL: https://issues.apache.org/jira/browse/PIG-1461 Project: Pig Issue Type: New Feature Components: impl Affects Versions: 0.8.0 Reporter: Thejas M Nair Fix For: 0.8.0 When the data has schema, it often makes sense to union on column names in schema rather than the position of the columns. The behavior of existing union operator should remain backward compatible . This feature can be supported using either a new operator or extending union to support 'using' clause . I am thinking of having a new operator called either unionschema or merge . Does anybody have any other suggestions for the syntax ? example - L1 = load 'x' as (a,b); L2 = load 'y' as (b,c); U = unionschema L1, L2; describe U; U: {a:bytearray, b:byetarray, c:bytearray} -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.