Yash-cor commented on code in PR #34384:
URL: https://github.com/apache/shardingsphere/pull/34384#discussion_r1946274746
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infra/binder/src/main/java/org/apache/shardingsphere/infra/binder/engine/segment/dml/with/CommonTableExpressionSegmentBinder.java:
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@@ -54,16 +71,102 @@ public static CommonTableExpressionSegment bind(final
CommonTableExpressionSegme
}
if (recursive && segment.getAliasName().isPresent()) {
binderContext.getExternalTableBinderContexts().put(new
CaseInsensitiveString(segment.getAliasName().get()),
- new
SimpleTableSegmentBinderContext(segment.getColumns().stream().map(ColumnProjectionSegment::new).collect(Collectors.toList())));
+ createWithTableBinderContext(segment, binderContext));
}
SubqueryTableSegment subqueryTableSegment = new
SubqueryTableSegment(segment.getStartIndex(), segment.getStopIndex(),
segment.getSubquery());
subqueryTableSegment.setAlias(segment.getAliasSegment());
SubqueryTableSegment boundSubquerySegment =
SubqueryTableSegmentBinder.bind(subqueryTableSegment,
binderContext, LinkedHashMultimap.create(),
binderContext.getExternalTableBinderContexts());
CommonTableExpressionSegment result = new CommonTableExpressionSegment(
segment.getStartIndex(), segment.getStopIndex(),
boundSubquerySegment.getAliasSegment().orElse(null),
boundSubquerySegment.getSubquery());
- // TODO bind with columns
result.getColumns().addAll(segment.getColumns());
+ if (result.getAliasName().isPresent()) {
+ binderContext.getExternalTableBinderContexts().removeAll(new
CaseInsensitiveString(result.getAliasName().get()));
+ binderContext.getExternalTableBinderContexts().put(new
CaseInsensitiveString(result.getAliasName().get()),
+ createWithTableBinderContext(result, binderContext));
+ }
+ result.getColumns().clear();
Review Comment:
Thanks for reply @strongduanmu
This segment `result.getColumns().addAll(segment.getColumns());` and
`result.getColumns().clear();` are needed for creating
ExternalTableBinderContexts.
ExternalTableBinderContexts need the result with Column Segment and binded
SubqueryTableSegment.
And in order to perform column bind for CommonTableExpressionSegment we need
the updated ExternalTableBinderContexts.
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