malinjawi commented on code in PR #12821:
URL: https://github.com/apache/gluten/pull/12821#discussion_r3850018594
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cpp/velox/substrait/SubstraitToVeloxExpr.cc:
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@@ -651,7 +700,7 @@ core::TypedExprPtr SubstraitVeloxExprConverter::toVeloxExpr(
case ::substrait::Expression::RexTypeCase::kScalarFunction:
return toVeloxExpr(substraitExpr.scalar_function(), inputType);
case ::substrait::Expression::RexTypeCase::kSelection:
- return toVeloxExpr(substraitExpr.selection(), inputType);
+ return toVeloxOrdinalFieldReferenceExpr(substraitExpr.selection(),
inputType);
Review Comment:
@zhouyuan Confirmed and fixed in d51133e38. Expand now passes the full
`projectExpr`, while both validation and conversion require a top-level field
because Velox Expand cannot execute nested dereferences. Nested selections now
fall back cleanly, with tests for both paths.
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