Available in versions: Dev (3.20)
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JSON_ARRAY_LENGTH
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
The JSON_ARRAY_LENGTH function is used to count the number of elements in a JSON_ARRAY.
SELECT json_array_length(json_array(1, 2))
create.select(jsonArrayLength(jsonArray(1, 2)))
.fetch();
The result would look like this:
+-------------------+ | json_array_length | +-------------------+ | 1 | +-------------------+
Dialect support
This example using jOOQ:
jsonArrayLength(val(json("[1,2]")))
Translates to the following dialect specific expressions:
Aurora Postgres, CockroachDB, Postgres, YugabyteDB
json_array_length(CAST('[1,2]' AS json))
BigQuery
array_length(json_query_array('[1,2]', '$'))
ClickHouse
JSONArrayLength('[1,2]')
DuckDB, SQLite
json_array_length('[1,2]')
MariaDB, MySQL
json_length('[1,2]')
Oracle
(
SELECT count(*)
FROM JSON_TABLE(
'[1,2]',
'$[*]'
COLUMNS (x varchar2(4000) PATH '$')
)
)
SQLServer
(
SELECT count(*)
FROM openjson('[1,2]')
)
ASE, Access, Aurora MySQL, DB2, Derby, Exasol, Firebird, H2, HSQLDB, Hana, Informix, MemSQL, Redshift, SQLDataWarehouse, Snowflake, Sybase, Teradata, Trino, Vertica
/* UNSUPPORTED */
Generated with jOOQ 3.20. Translate your own SQL on our website
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