mihaibudiu commented on code in PR #4290:
URL: https://github.com/apache/calcite/pull/4290#discussion_r2035802788
##########
core/src/main/java/org/apache/calcite/sql/dialect/ClickHouseSqlDialect.java:
##########
@@ -216,6 +216,24 @@ private static SqlDataTypeSpec
createSqlDataTypeSpecByName(String typeAlias,
}
switch (call.getKind()) {
+ case MAP_VALUE_CONSTRUCTOR:
+ writer.print(call.getOperator().getName().toLowerCase(Locale.ROOT));
+ final SqlWriter.Frame mapFrame = writer.startList("(", ")");
+ for (int i = 0; i < call.operandCount(); i++) {
+ writer.sep(",");
+ call.operand(i).unparse(writer, leftPrec, rightPrec);
+ }
+ writer.endList(mapFrame);
+ break;
+ case ARRAY_VALUE_CONSTRUCTOR:
+ writer.print(call.getOperator().getName().toLowerCase(Locale.ROOT));
Review Comment:
In Calcite there is an `ARRAY[]` constructor, and there is an `ARRAY()`
function in the Spark dialect. The former does not support "no arguments" - at
least when parsing. The latter does. (I think that's a bug, you should always
be able to build an empty array.) Maybe something similar goes on in Clickhouse?
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