davidradl commented on code in PR #28733:
URL: https://github.com/apache/flink/pull/28733#discussion_r3570748878
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flink-table/flink-table-common/src/main/java/org/apache/flink/table/types/logical/utils/LogicalTypeCasts.java:
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@@ -726,6 +730,31 @@ private static boolean supportsConstructedCasting(
return false;
}
+ private static boolean supportsVariantToScalarCast(LogicalType targetType)
{
+ switch (targetType.getTypeRoot()) {
+ case BOOLEAN:
+ case TINYINT:
+ case SMALLINT:
+ case INTEGER:
+ case BIGINT:
+ case FLOAT:
+ case DOUBLE:
+ case DECIMAL:
+ case BINARY:
+ case VARBINARY:
+ case DATE:
+ case TIMESTAMP_WITHOUT_TIME_ZONE:
+ case TIMESTAMP_WITH_LOCAL_TIME_ZONE:
+ return true;
+ default:
+ // TIME has no counterpart in the Variant type model.
CHARACTER_STRING is handled by
Review Comment:
I wonder if the cast is to a string then we could issue a helpful exception
message indicating which SQL functions the user should use.
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