[CALCITE-2358] Use null literal instead of empty string as argument for timestamp_parse Druid expression

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.17.0
• Component/s: druid-adapter
• Assignee: Slim Bouguerra
• Reporter: Slim Bouguerra
• Created: 12/Jun/18 12:37
• Updated: 13/Apr/19 17:29
• Resolved: 14/Jun/18 13:37

Description

With the new ability to support null values in Druid, empty string is not equal to null anymore.
To enable auto format parser

timestamp_parse

Druid function expects null literal as format argument.
I have added a connection config parameter to allow smooth transition from old Druid version to version 0.13.0 and above.

Issue Links

• relates to: CALCITE-2804 Druid adapter: Cast does not work when casting to timestamp
• links to: Pull Request