dengzhhu653 commented on code in PR #3276:
URL: https://github.com/apache/hive/pull/3276#discussion_r959360941
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standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/dataconnector/jdbc/MySQLConnectorProvider.java:
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@@ -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:
Converting to bigint may have problems in joining or pushing predicate down
on the bit column. I wondering if we take the trino way to deal with such
column: converts the bit(1) to boolean type, and for those greater than 1,
throws MetaException indicating that Hive is unable to map that remote table.
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