[jira] [Created] (FLINK-19062) Improve alter table DDL

[Shang Yuanchun (Jira)]

Jingsong Lee created FLINK-19062:
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             Summary: Improve alter table DDL
                 Key: FLINK-19062
                 URL: https://issues.apache.org/jira/browse/FLINK-19062
             Project: Flink
          Issue Type: New Feature
          Components: Table SQL / API
            Reporter: Jingsong Lee


Support:
 * ALTER TABLE table_name UNSET TBLPROPERTIES (key)
 * ALTER TABLE table_name CHANGE [COLUMN] col_old_name col_new_name column_type [COMMENT col_comment]
 * ALTER TABLE table_name add `column` ...
 * ALTER TABLE table_name replace `column` ...



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