cloud-fan commented on code in PR #39062:
URL: https://github.com/apache/spark/pull/39062#discussion_r1112517669
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sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala:
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@@ -135,6 +135,38 @@ abstract class JdbcDialect extends Serializable with
Logging {
s""""$colName""""
}
+ /**
+ * Get the SQL that should be used to create a table. Dialects can
+ * override this method to return a SQL that works best in a particular
database.
+ * To allow certain options to append when create a new table, which can be
+ * table_options or partition_options.
+ * E.g., "CREATE TABLE t (name string) ENGINE=InnoDB DEFAULT CHARSET=utf8"
+ * @param tableName The name of the table.
+ * @param strSchema The scheme string corresponding to the dialect, the
schemaString method of
+ * JdbcUtils has provided the function of calculating the
scheme string
+ * for different databases
+ * @param createTableOptions The string of the options that to allow certain
options to append
+ * when create a new table, which can be
table_options
+ * or partition_options.
+ */
+ def createTable(
+ statement: Statement,
+ tableName: String,
+ strSchema: String,
+ options: JdbcOptionsInWrite): Unit = {
+ val createTableQuery = getCreateTableQuery(tableName, strSchema,
options.createTableOptions)
Review Comment:
`getAddColumnQuery` is used by `alterTable`. The idea is, `alterTable` has
many parts and it's too much to override `alterTable` if only the ADD COLUMN
syntax needs to be adjusted.
Can we follow `createSchema` here?
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