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JSON_EXISTS predicate
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The JSON_EXISTS predicate can be used to check whether a JSON path expression produces a value within a JSON document (see also the JSON_VALUE function)
SELECT 1
FROM dual
WHERE json_exists('{"a":1}', '$.a')
create.selectOne()
.where(jsonExists(val(json("{\"a\":1}")), "$.a"))
.fetch();
Dialect support
This example using jOOQ:
jsonExists(val(json("{\"a\":1}")), "$.a")
Translates to the following dialect specific expressions:
-- AURORA_POSTGRES, COCKROACHDB
JSON_EXISTS(CAST('{"a":1}' AS json), '$.a')
-- DB2, MARIADB, ORACLE
JSON_EXISTS('{"a":1}', '$.a')
-- MYSQL
json_contains_path('{"a":1}', 'one', '$.a')
-- POSTGRES
jsonb_path_exists(CAST('{"a":1}' AS jsonb), CAST('$.a' AS jsonpath))
-- SQLITE
json_type('{"a":1}', '$.a') IS NOT NULL
-- ACCESS, ASE, AURORA_MYSQL, BIGQUERY, DERBY, EXASOL, FIREBIRD, H2, HANA, HSQLDB, INFORMIX, MEMSQL, REDSHIFT, SNOWFLAKE,
-- SQLDATAWAREHOUSE, SQLSERVER, SYBASE, TERADATA, VERTICA, YUGABYTEDB
/* UNSUPPORTED */
(These are currently generated with jOOQ 3.18, see #10141), or translate your own on our website
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