[DRILL-5546] Schema change problems caused by empty batch

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Assignee: Jinfeng Ni
• Reporter: Jinfeng Ni
• Created: 26/May/17 20:41
• Updated: 06/Dec/18 17:06
• Resolved: 05/Sep/17 21:52

Description

There have been a few JIRAs opened related to schema change failure caused by empty batch. This JIRA is opened as an umbrella for all those related JIRAS ( such as DRILL-4686, DRILL-4734, DRILL4476, DRILL-4255, etc).

Issue Links

• causes: DRILL-6774 Wrong data types of empty batches schema for queries with aliases
• causes: DRILL-6773 The renamed schema with aliases is not shown for queries on empty directories
• incorporates: DRILL-2775 message error not clear when doing a select or ctas on empty folder
• is related to: DRILL-4185 UNION ALL involving empty directory on any side of union all results in Failed query
• relates to: DRILL-4255 SELECT DISTINCT query over JSON data returns UNSUPPORTED OPERATION
• relates to: DRILL-4476 Enhance Union-All operator for dealing with empty left input or empty both inputs
• relates to: DRILL-4686 Aggregation query over HBase table results in IllegalStateException: Failure while reading vector
• relates to: DRILL-4734 Query against HBase table on a 5 node cluster fails with SchemaChangeException
• relates to: DRILL-5185 Union all not passing type info when the output contains 0 rows
• relates to: DRILL-5327 Hash aggregate can return empty batch which can cause schema change exception
• relates to: DRILL-5464 Fix JSON reader when it deals with empty file
• relates to: DRILL-5480 Empty batch returning from HBase may cause SchemaChangeException even when data does not have different schema
• supercedes: DRILL-2618 BasicFormatMatcher calls getFirstPath(...) without checking # of paths is not zero
• links to: GitHub Pull Request #906