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How to create a JSON function in PostgreSQL?
For information JSON is not obliged but it is the thing that seemed the simplest to me. But maybe the creation of a POSTGRES type can work. Then how to process the object if I use a JSON or PostGres Type. CREATE OR REPLACE FUNCTION MYFUNCTION (myobject JSON ?
How to pass JSON array as function argument?
Appending square brackets ( []) creates a Postgres array datatype and is not self castable to a JSON array type You’ll receive this if you did so. create or replace function test (json_in json) .. .. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Provide details and share your research! But avoid …
How to extract the values from the JSON object?
) RETURNS TABLE ( “OK” BOOLEAN, “NB” VARCHAR ) AS $$ DECLARE BEGIN — I would like to get for each object in the list the price1 and price2 to compare them. END; $$ LANGUAGE ‘plpgsql’; The crux of the question seems to be how to extract the values from the json object. This is one way: Note. The json object you provide isn’t legal.
Do you need a loop to process JSON?
No Need to use loop for processing on the JSON ARRAY. you can use JSONB_ARRAY_ELEMENTS or JSONB_TO_RECORDSET for your requirement like below: Thanks for contributing an answer to Stack Overflow!
Are there any comparison operators for JSON in PostgreSQL?
In addition, the usual comparison operators shown in Table 9.1 are available for jsonb, though not for json. The comparison operators follow the ordering rules for B-tree operations outlined in Section 8.14.4. Extracts n ‘th element of JSON array (array elements are indexed from zero, but negative integers count from the end).
How to suppress jsonpath errors in PostgreSQL?
The jsonpath operators @? and @@ suppress the following errors: missing object field or array element, unexpected JSON item type, datetime and numeric errors. The jsonpath -related functions described below can also be told to suppress these types of errors.
When to omit the JSON prefix in PostgreSQL?
If PostgreSQL can implicitly convert the parameter to json then you can omit ::json. If you cannot guarantee that the casting is always performed in your statement, you pass ::json and the operators can be used. When in doubt, use the ::json prefix before the first json operator.