[PIG-1351] [Zebra] No type check when we write to the basic table

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7.0
• Fix Version/s: 0.8.0
• Assignee: Chao Wang
• Reporter: Chao Wang
• Created: 02/Apr/10 17:29
• Updated: 17/Dec/10 22:44
• Resolved: 16/Apr/10 19:09

Description

In Zebra, we do not have any type check when writing to a basic table.

Say, we have a schema: "f1:int, f2:string",
however we can write a tuple ("abc", 123) without any problem, which is definitely not desirable.

To overcome this problem, we decide to perform certain amount of type checking in Zebra - We check the first row only for each writer.
This only serves as a sanity check purpose in cases where users screw up specifying the output schema. We do NOT perform a rigorous type checking for all rows for apparently performance concerns.