When in doubt, use the ::json prefix before the first json operator. Postgres v14 allows you to access and manipulate JSON data in the conventional. Now let’s consider the improvements to JSON that came with v14. In Postgres v12, JSONPath was added to improve the efficiency of query JSON data. If you cannot guarantee that the casting is always performed in your statement, you pass ::json and the operators can be used. Most people prefer to use JSONB instead of JSON in Postgres. > Parallel Seq Scan on posts_json (cost=6.44 rows=19665 width=0) (actual time=0.060.40.847 rows=2555 loops=4)įilter: jsonb_path_exists(data, = "postgresql")'::jsonpath, '' does not return those. If PostgreSQL can implicitly convert the parameter to json then you can omit ::json. JSONEXISTS() tests if the jsonpath expression applied to the jsonb value yields any values. The workaround for now is to cast the argument to jsonb. Note: If you'd like to see the updated syntax for JSON support in PostgreSQL 14 checkout the post here The content in this post is directed. The functions are: JSONEXISTS() JSONQUERY() JSONVALUE() All of these functions only operate on jsonb. Let's take a look at how we can store and query this data in PostgreSQL. > Gather (cost=1375.91 rows=3 width=8) (actual time=69.513.98.152 rows=4 loops=1) Querying JSON Data in PostgreSQL Storing JSON provides flexibility, but can add complexity.
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