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
ASE, Access, Aurora MySQL, Aurora Postgres, BigQuery, ClickHouse, CockroachDB, DB2, Derby, DuckDB, Exasol, Firebird, H2, HSQLDB, Hana, Informix, MariaDB, MemSQL, MySQL, Oracle, Redshift, SQLDataWarehouse, SQLServer, SQLite, Snowflake, Sybase, Teradata, Trino, Vertica, YugabyteDB
/* UNSUPPORTED */
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