I’m attempting to return 0.0 if the following function does not return anything: I’ve tried searching for it and found that COALESCE does not work. Does anyone have any ideas how to solve this? Table structure: Example data: Answer Here is the script I used. As you can see I run PostgreSQL 9.4.1. I used HeidiSQL to launch the queries.
Tag: plpgsql
How to use variables in “EXECUTE format()” in plpgsql
I want to update a column in table stats with the specific column being a parameter, then return the updated value of that column [only has 1 row]: CREATE FUNCTION grow(col varchar) RETURNS integer …
Stored procedure to return count
I am trying to make a stored procedure for the query I have: or I have written this stored procedure but it returns count of all the records in column not the result of query plus I need to write stored procedure in plpgsql not in SQL. Help me write this type of stored procedure in plpgsql which returns returns
Trigger for checking a given value before INSERT or UPDATE on PostgreSQL
I have to create a trigger to update a database where there are products. Products have an expiration date and before inserting or updating a product I must check if the expirationDate is superior to the current timestamp. If it is I must do the insert/update regularly (this is what I have problems with). If not I just simply ignore
EXPLAIN ANALYZE within PL/pgSQL gives error: “query has no destination for result data”
I am trying to understand the query plan for a select statement within a PL/pgSQL function, but I keep getting errors. My question: how do I get the query plan? Following is a simple case that reproduces the problem. The table in question is named test_table. The function is as follows: When I run I get the error: The function
Does Postgresql plpgsql/sql support short circuiting in the where clause?
If I have the following toy query Would the first condition in the WHERE clause short circuit the second condition which would have a complex run time? I’m working on some sql that is actually part of a FOR LOOP in plpgsql, and I could do iterations over all records that exist in the my_other_tables, and then test within the
PL/pgSQL SELECT into an array
Here’s my function declaration and part of the body: I want team_ids to be an array of ints that I can then use in the UPDATE statement. This function give me errors like this: Answer Faster and simpler with a FROM clause in your UPDATE statement: That aside, while operating with an array, the WHERE clause would have to be:
PostgreSQL IF statement
How can I do such query in Postgres? IF (select count(*) from orders) > 0 THEN DELETE from orders ELSE INSERT INTO orders values (1,2,3);
Function as parameter to another function in Postgres
Can I create a user defined function in Postgres either through the C-Language Function API or by using pl/pgsql which accepts a callback function as parameter? As far as I see there is no way to do this through the C-Language API since it only accepts sql datatypes and there is no datatype for function. But maybe I’m missing something?
How to return result of a SELECT inside a function in PostgreSQL?
I have this function in PostgreSQL, but I don’t know how to return the result of the query: But I don’t know how to return the result of the query inside the PostgreSQL function. I found that the return type should be SETOF RECORD, right? But the return command is not right. What is the right way to do this?