JSON_OBJECT

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

The JSON_OBJECT function is used to produce simple JSON objects from scalar values, without aggregation (see also JSON_OBJECTAGG)

SELECT json_object(
  KEY 'firstName' VALUE author.first_name, 
  KEY 'lastName'  VALUE author.last_name
)
FROM author

create.select(jsonObject(
          key("firstName").value(AUTHOR.FIRST_NAME), 
          key("lastName").value(AUTHOR.LAST_NAME)))
      .from(AUTHOR)
      .fetch();

The result would look like this:

+--------------------------------------------+
| json_array                                 |
+--------------------------------------------+
| {"firstName":"Paulo","lastName":"Coelho"}  | 
| {"firstName":"George","lastName":"Orwell"} |
+--------------------------------------------+

Dialect support

This example using jOOQ:

jsonObject("firstName", AUTHOR.FIRST_NAME)

Translates to the following dialect specific expressions:

-- AURORA_POSTGRES, COCKROACHDB, POSTGRES
json_build_object('firstName', AUTHOR.FIRST_NAME)

-- DB2, H2, ORACLE
JSON_OBJECT(KEY 'firstName' VALUE AUTHOR.FIRST_NAME)

-- MARIADB, MYSQL
JSON_OBJECT('firstName', AUTHOR.FIRST_NAME)

-- SQLSERVER
(SELECT * FROM (VALUES (AUTHOR.FIRST_NAME)) t (firstName) FOR JSON AUTO, WITHOUT_ARRAY_WRAPPER)

-- ACCESS, ASE, AURORA_MYSQL, BIGQUERY, DERBY, FIREBIRD, HANA, HSQLDB, IGNITE, INFORMIX, INGRES, MEMSQL, REDSHIFT, SNOWFLAKE, 
-- SQLDATAWAREHOUSE, SQLITE, SYBASE, TERADATA, VERTICA
/* UNSUPPORTED */

(These are currently generated with jOOQ 3.15, see #10141)

The jOOQ User Manual : SQL building : Column expressions : JSON functions : JSON_OBJECT

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