feat(online): union all query#3590
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aceforeverd merged 2 commits into4paradigm:mainfrom Dec 4, 2023
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## main #3590 +/- ##
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+ Coverage 40.14% 74.94% +34.80%
Complexity 635 635
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Files 191 724 +533
Lines 11207 130710 +119503
Branches 1317 1317
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+ Hits 4499 97966 +93467
- Misses 6417 32453 +26036
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Re-impl column to source info in physical node, support multiple result source info, previously it is one result only. Multiple source result is required for SetOperationNode, like union all, every input node may produce the target column.
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This was referenced Nov 21, 2023
aceforeverd
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dl239
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SYNTAX
UNION is one kind of set operation, currently it support UNION only.
set_operation: query_expr UNION { DISTINCT | ALL } query_expr query_expr: [ WITH {non_recursive_cte}[, ...] ] { select | ( query_expr ) | set_operation } [ ORDER BY expression [, ...] ] [ LIMIT count ] select: SELECT select_list [ FROM from_clause[, ...] ] [ WHERE bool_expression ] [ GROUP BY group_by_specification ] [ HAVING bool_expression ] [ WINDOW window_clause ]Rules
1. ONLY UNION ALL
2. `UNION output result, with ordering undefined by default.
Say
SELECT * FROM t1 UNION ALL SELECT * FROM t2, and assume two inputs source for UNION is know as ordered. UNION result may still not ordered.3. support with other SQL clauses
4. Online Rules
PATTERN:
LAST JOIN ( UNION ALL (t1, t2) )