walterddr commented on code in PR #9702:
URL: https://github.com/apache/pinot/pull/9702#discussion_r1012150602
##########
pinot-core/src/main/java/org/apache/pinot/core/operator/transform/function/CaseTransformFunction.java:
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@@ -84,17 +84,40 @@ public void init(List<TransformFunction> arguments,
Map<String, DataSource> data
}
int numWhenStatements = arguments.size() / 2;
_whenStatements = new ArrayList<>(numWhenStatements);
+ _elseThenStatements = new ArrayList<>(numWhenStatements + 1);
+ constructStatementList(arguments);
+ _selections = new boolean[_elseThenStatements.size()];
+ Collections.reverse(_elseThenStatements);
+ Collections.reverse(_whenStatements);
+ _resultMetadata = calculateResultMetadata();
+ }
+
+ private void constructStatementList(List<TransformFunction> arguments) {
+ int numWhenStatements = arguments.size() / 2;
+ boolean hasLegacyFormat = false;
+ for (int i = 0; i < numWhenStatements; i++) {
+ if (arguments.get(i * 2).getResultMetadata().getDataType() !=
DataType.BOOLEAN) {
+ hasLegacyFormat = true;
+ break;
Review Comment:
`if (all_first_half_are_expression_boolean_type &&
odd_half_has_non_boolean_type) then use`
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