[HAWQ-1116] Enhance HAWQ/PXF Bridge to support isNull and isNotNull

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: backlog
• Component/s: PXF
• Assignee: Shivram Mani
• Reporter: Shivram Mani
• Created: 19/Oct/16 21:13
• Updated: 26/Oct/16 22:15
• Resolved: 26/Oct/16 17:25

Description

HAWQ/PXF Bridge must support pushing filters containing isNull and isNotNull to PXF as part of the filter expression string

We will not need any constant value as part of these operators in the filter string.
eg: name is NULL will be represented as <attcode><attvalue><opcode><opvalue>

Issue Links

• links to: GitHub Pull Request #977