yzeng1618 commented on code in PR #10145:
URL: https://github.com/apache/seatunnel/pull/10145#discussion_r2633304169
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seatunnel-transforms-v2/src/main/java/org/apache/seatunnel/transform/sql/zeta/functions/CommonFunction.java:
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@@ -44,6 +46,17 @@ public static SeaTunnelDataType resolveExpressionType(
if (expression instanceof NullValue) {
return null;
}
+ if (expression instanceof ComparisonOperator) {
+ return BasicType.BOOLEAN_TYPE;
+ }
+ if (expression instanceof BinaryExpression) {
+ BinaryExpression binaryExpression = (BinaryExpression) expression;
+ SeaTunnelDataType leftType =
+
resolveExpressionType(binaryExpression.getLeftExpression(), rowType);
+ SeaTunnelDataType rightType =
+
resolveExpressionType(binaryExpression.getRightExpression(), rowType);
+ return unifyCollectionType(leftType, rightType);
+ }
Review Comment:
This change extends CommonFunction.resolveExpressionType to support
ComparisonOperator (always BOOLEAN) and BinaryExpression (derive a common type
by recursively resolving operands), so type inference for ARRAY(...)/MAP(...)
works when arguments are expressions instead of only literals/columns;
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