zhangbutao commented on code in PR #3276:
URL: https://github.com/apache/hive/pull/3276#discussion_r959386377
##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/dataconnector/jdbc/MySQLConnectorProvider.java:
##########
@@ -90,10 +90,20 @@ protected String getDataType(String dbDataType, int size) {
// map any db specific types here.
switch (dbDataType.toLowerCase())
{
+ case "bit":
+ return toHiveBitType(size);
default:
mappedType = ColumnType.VOID_TYPE_NAME;
break;
}
return mappedType;
}
+
+ private String toHiveBitType(int size) {
+ if (size <= 1) {
+ return ColumnType.BOOLEAN_TYPE_NAME;
+ } else {
+ return ColumnType.BIGINT_TYPE_NAME;
Review Comment:
Not sure if this way(to bigint) affects the joining or pushing predicate
down in hive. I have checked Spark related code earlier and that's what spark
did.
The Trino's way is simple and straightforward, but maybe lose the real
meaning of MySQL's bit(n>1). However, i also think this is an optional solution
because maybe we don't want spare much time to deal with the special and not
commonly used data type.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
