caicancai commented on code in PR #4247:
URL: https://github.com/apache/calcite/pull/4247#discussion_r2014063084
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core/src/main/java/org/apache/calcite/sql/dialect/ClickHouseSqlDialect.java:
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@@ -181,6 +188,21 @@ private static SqlDataTypeSpec
createSqlDataTypeSpecByName(String typeAlias,
return;
}
+ if (call.getOperator() instanceof SqlFilterOperator) {
+ SqlCall aggCall = call.operand(0);
+ if (call.getOperandList().size() > 1 && call.operand(1) != null) {
+ SqlCall filterCondition = call.operand(1);
+ String functionName = aggCall.getOperator().getName();
+ writer.print(functionName.toLowerCase(Locale.ROOT) + "If");
Review Comment:
@xiedeyantu No, according to your writing above, all aggregate functions
will be executed in your method. If some functions of ClickHouse are not
supported by Calcite, you at least need to record JavaDoc to explain it.
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