huaxingao commented on a change in pull request #30154:
URL: https://github.com/apache/spark/pull/30154#discussion_r513603989
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File path: sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
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@@ -258,6 +258,10 @@ abstract class JdbcDialect extends Serializable {
s"ALTER TABLE $tableName ALTER COLUMN ${quoteIdentifier(columnName)} SET
$nullable"
}
+ def getTableCommentQuery(table: String, comment: String): String = {
+ s"COMMENT ON TABLE $table IS '$comment'"
Review comment:
Seems only MySQL has a way to let user to specify table options such as
`COMMENT`, `ENGINE`, etc. in `CREATE TABLE`. I use a separate statement for
MySQL anyway to make it consistent with others.
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