Airblader commented on a change in pull request #16858:
URL: https://github.com/apache/flink/pull/16858#discussion_r702726469
##########
File path: docs/data/sql_functions.yml
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@@ -667,6 +666,46 @@ json:
JSON_VALUE('{"a": true}', 'strict $.b'
DEFAULT FALSE ON ERROR)
```
+ - sql: JSON_QUERY(jsonValue, path [ { WITHOUT | WITH CONDITIONAL | WITH
UNCONDITIONAL } [ ARRAY ] WRAPPER ] [ { NULL | EMPTY ARRAY | EMPTY OBJECT |
ERROR } ON EMPTY ] [ { NULL | EMPTY ARRAY | EMPTY OBJECT | ERROR } ON ERROR ])
+ table: STRING.jsonQuery(path [, JsonQueryWrapper [,
JsonQueryOnEmptyOrError, JsonQueryOnEmptyOrError ] ])
+ description: |
+ Extracts JSON values from a JSON string.
+
+ The result is always returned as a `STRING`. The `RETURNING` clause is
currently not supported.
Review comment:
Yes, Calcite simply doesn't seem to support that.
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