INSERT OVERWRITE DIRECTORY

Description

The INSERT OVERWRITE DIRECTORY statement overwrites the existing data in the directory with the new values using either spark file format or Hive Serde. Hive support must be enabled to use Hive Serde. The inserted rows can be specified by value expressions or result from a query.

Syntax

  1. INSERT OVERWRITE [ LOCAL ] DIRECTORY [ directory_path ]
  2.     { spark_format | hive_format }
  3.     { VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ] | query }

While spark_format is defined as

  1. USING file_format [ OPTIONS ( key = val [ , ... ] ) ]

hive_format is defined as

  1. [ ROW FORMAT row_format ] [ STORED AS hive_serde ]

Parameters

  • directory_path

    Specifies the destination directory. The LOCAL keyword is used to specify that the directory is on the local file system. In spark file format, it can also be specified in OPTIONS using path, but directory_path and path option can not be both specified.

  • file_format

    Specifies the file format to use for the insert. Valid options are TEXT, CSV, JSON, JDBC, PARQUET, ORC, HIVE, LIBSVM, or a fully qualified class name of a custom implementation of org.apache.spark.sql.execution.datasources.FileFormat.

  • OPTIONS ( key = val [ , … ] )

    Specifies one or more options for the writing of the file format.

  • hive_format

    Specifies the file format to use for the insert. Both row_format and hive_serde are optional. ROW FORMAT SERDE can only be used with TEXTFILE, SEQUENCEFILE, or RCFILE, while ROW FORMAT DELIMITED can only be used with TEXTFILE. If both are not defined, spark uses TEXTFILE.

  • row_format

    Specifies the row format for this insert. Valid options are SERDE clause and DELIMITED clause. SERDE clause can be used to specify a custom SerDe for this insert. Alternatively, DELIMITED clause can be used to specify the native SerDe and state the delimiter, escape character, null character, and so on.

  • hive_serde

    Specifies the file format for this insert. Valid options are TEXTFILE, SEQUENCEFILE, RCFILE, ORC, PARQUET, and AVRO. You can also specify your own input and output format using INPUTFORMAT and OUTPUTFORMAT.

  • VALUES ( { value | NULL } [ , … ] ) [ , ( … ) ]

    Specifies the values to be inserted. Either an explicitly specified value or a NULL can be inserted. A comma must be used to separate each value in the clause. More than one set of values can be specified to insert multiple rows.

  • query

    A query that produces the rows to be inserted. It can be in one of following formats:

Examples

Spark format

  1. INSERT OVERWRITE DIRECTORY '/tmp/destination'
  2.     USING parquet
  3.     OPTIONS (col1 1, col2 2, col3 'test')
  4.     SELECT * FROM test_table;
  6. INSERT OVERWRITE DIRECTORY
  7.     USING parquet
  8.     OPTIONS ('path' '/tmp/destination', col1 1, col2 2, col3 'test')
  9.     SELECT * FROM test_table;

Hive format

  1. INSERT OVERWRITE LOCAL DIRECTORY '/tmp/destination'
  2.     STORED AS orc
  3.     SELECT * FROM test_table;
  5. INSERT OVERWRITE LOCAL DIRECTORY '/tmp/destination'
  6.     ROW FORMAT DELIMITED FIELDS TERMINATED BY ','
  7.     SELECT * FROM test_table;