Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/15664#discussion_r94079276 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala --- @@ -211,6 +211,55 @@ object JdbcUtils extends Logging { } /** + * Returns the schema if the table already exists in the JDBC database. + */ + def getSchema(conn: Connection, url: String, table: String): Option[StructType] = { + val dialect = JdbcDialects.get(url) + + try { + val statement = conn.prepareStatement(dialect.getSchemaQuery(table)) --- End diff -- Yes. It's due to `PreparedStatement prepareStatement(String sql) throws SQLException`. I want to make it sure to return `None` instead of raising SQLException at this line.
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