DOCUMENT predicate

Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition

The DOCUMENT predicate can be used to check if a given expression is an XML document (as opposed to toher XML content).

SELECT 1
WHERE
  '<xml/>' IS DOCUMENT
  AND '<!-- comment -->' IS NOT DOCUMENT

create.selectOne()
      .where(val("<xml/>").isDocument())
      .and(val("<!-- comment -->").isNotDocument())
      .fetch();

Dialect support

This example using jOOQ:

AUTHOR.FIRST_NAME.isDocument()

Translates to the following dialect specific expressions:

-- POSTGRES
AUTHOR.FIRST_NAME IS DOCUMENT

-- ACCESS, ASE, AURORA_MYSQL, AURORA_POSTGRES, BIGQUERY, COCKROACHDB, DB2, DERBY, EXASOL, FIREBIRD, H2, HANA, HSQLDB, 
-- INFORMIX, MARIADB, MEMSQL, MYSQL, ORACLE, REDSHIFT, SNOWFLAKE, SQLDATAWAREHOUSE, SQLITE, SQLSERVER, SYBASE, TERADATA, VERTICA, 
-- YUGABYTE
/* UNSUPPORTED */

(These are currently generated with jOOQ 3.16, see #10141), or translate your own on our website

The jOOQ User Manual : SQL building : Conditional expressions : DOCUMENT predicate

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