[PIG-278] Allow no alias in Dot schema definition in Dot LogicalPlanLoader

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.1.0
• Patch Info: Patch Available
• Assignee: Pi Song
• Reporter: Pi Song
• Created: 23/Jun/08 12:28
• Updated: 25/Mar/10 00:12
• Resolved: 04/Jul/08 15:24

Description

Our schema parser doesn't allow "null" alias but we have to be able to do that in Dot test files.
This is a work around by introducing "[NoAlias]" keyword in schema definition just for Dot LogicalPlanLoader.

Sample:-

foreach [  key="20", type="LOForEach" , schema="[NoAlias] : long, [NoAlias] : byteArray"    ] ;

At runtime, [NoAlias] will be substituted by dummy column names before being sent to the parser. Subsequently those names will be replaced by "null". There is no changes in the actual query parser.