Henry Robinson created HIVE-9866:
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Summary: Changing a column's type doesn't change column stats type
in metastore
Key: HIVE-9866
URL: https://issues.apache.org/jira/browse/HIVE-9866
Project: Hive
Issue Type: Bug
Reporter: Henry Robinson
If I have a table {{at}}, with a column {{id}} of type {{DOUBLE}}, the
metastore will have an entry in {{TAB_COL_STATS}} something like:
{code}
hive_ms=> select "TABLE_NAME", "COLUMN_NAME", "COLUMN_TYPE" from
"TAB_COL_STATS" WHERE "TBL_ID" = 1341 AND "COLUMN_NAME" = 'id';
TABLE_NAME | COLUMN_NAME | COLUMN_TYPE
------------+-------------+-------------
at | id | DOUBLE
{code}
If in Hive I then do:
{{hive> alter table at change column id id int;}}
The {{COLUMN_TYPE}} column does not change in the metastore. This means that
any subsequent attempts to change the column statistics through the metastore
client via {{updateTableColumnStatistics()}} will silently fail.
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