[SPARK-21463] Output of StructuredStreaming tables don't respect user specified schema when reading back the table

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.3.0
• Component/s: SQL, Structured Streaming
• Assignee: Burak Yavuz
• Reporter: Burak Yavuz
• Created: 18/Jul/17 20:16
• Updated: 20/Jul/17 18:21
• Resolved: 20/Jul/17 18:21

Description

When using the MetadataLogFileIndex to read back a table, we don't respect the user provided schema as the proper column types. This can lead to issues when trying to read strings that look like dates that get truncated to DateType, or longs being truncated to IntegerType, just because a long value doesn't exist.

Issue Links

• links to: [Github] Pull Request #18676 (brkyvz)