[DRILL-4538] Turn on Union type by default

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Jacques Nadeau
• Created: 24/Mar/16 21:35
• Updated: 15/Feb/23 06:30

Issue Links

• depends upon: DRILL-4605 Flatten doesn't return nested arrays correctly when Union is enabled
• is related to: DRILL-4158 Using CASE statement with heterogeneous schemas, NullPointers or returns Nonrelated error
• is related to: DRILL-4284 Complex Data Causing Index Out of Bounds with UNION Type
• is related to: DRILL-4316 java.lang.ArrayIndexOutOfBoundsException querying JSON with exec.enable_union_type = true
• is related to: DRILL-4505 Can't group by or sort across files with different schema
• is related to: DRILL-4503 Schema change exception even with all_text_mode enabled
• is related to: DRILL-4520 Error parsing JSON ( a column with different datatypes )
• relates to: DRILL-3577 Counting nested fields on CTAS-created-parquet file/s reports inaccurate results

Sub-Tasks

• UDF with FieldReader parameter reading union type fails compilation: Open
• Make complex writer handle also scalars: Open