AUTO mode
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The AUTO mode generates JSON content based on automatically generated object keys that model the query structure.
Consider the following query
SELECT id, title FROM book ORDER BY id FOR JSON AUTO
create.select(BOOK.ID, BOOK.TITLE)
.from(BOOK)
.orderBy(BOOK.ID)
.forJSON().auto()
.fetch();
This query produces a document like this:
[
{"id": 1, "title": "1984"},
{"id": 2, "title": "Animal Farm"},
{"id": 3, "title": "O Alquimista"},
{"id": 4, "title": "Brida"}
]
Dialect support
This example using jOOQ:
select(BOOK.ID).from(BOOK).orderBy(BOOK.ID).forJSON().auto()
Translates to the following dialect specific expressions:
Aurora Postgres, CockroachDB, Postgres, YugabyteDB
SELECT json_agg(json_strip_nulls(json_build_object('ID', ID)))
FROM (
SELECT BOOK.ID
FROM BOOK
ORDER BY BOOK.ID
) t
DB2
SELECT CAST(('[' || listagg(
json_object(
KEY 'ID' VALUE ID
ABSENT ON NULL
),
','
) || ']') AS varchar(32672))
FROM (
SELECT BOOK.ID
FROM BOOK
ORDER BY BOOK.ID
) t
H2
SELECT json_arrayagg(json_object( KEY 'ID' VALUE ID ABSENT ON NULL )) FROM ( SELECT BOOK.ID FROM BOOK ORDER BY BOOK.ID ) t
MariaDB, MySQL
SET @t = @@group_concat_max_len;
SET @@group_concat_max_len = 4294967295;
SELECT json_merge_preserve(
'[]',
concat(
'[',
group_concat(json_object('ID', ID) SEPARATOR ','),
']'
)
)
FROM (
SELECT BOOK.ID
FROM BOOK
ORDER BY BOOK.ID
) t;
SET @@group_concat_max_len = @t;
Oracle
SELECT json_arrayagg(json_object( KEY 'ID' VALUE ID ABSENT ON NULL RETURNING clob ) FORMAT JSON RETURNING clob) FROM ( SELECT BOOK.ID FROM BOOK ORDER BY BOOK.ID ) t
SQLServer
SELECT ( SELECT BOOK.ID FROM BOOK ORDER BY BOOK.ID FOR JSON AUTO )
Sybase
SELECT ( SELECT BOOK.ID FROM BOOK ORDER BY BOOK.ID FOR JSON AUTO ) FROM SYS.DUMMY
Trino
SELECT cast(array_agg(CAST(map_from_entries(filter(
ARRAY[row(
'ID',
CAST(ID AS json)
)],
e -> e[2] IS NOT NULL
)) AS json)) AS json)
FROM (
SELECT BOOK.ID
FROM BOOK
ORDER BY BOOK.ID
) t
ASE, Access, Aurora MySQL, BigQuery, ClickHouse, Databricks, Derby, DuckDB, Exasol, Firebird, HSQLDB, Hana, Informix, MemSQL, Redshift, SQLDataWarehouse, SQLite, Snowflake, Teradata, Vertica
/* UNSUPPORTED */
Generated with jOOQ 3.21. Support in older jOOQ versions may differ. Translate your own SQL on our website
Feedback
Do you have any feedback about this page? We'd love to hear it!