How do I pass a variable in PostgreSQL procedure?

How do I pass a variable in PostgreSQL procedure?

The get_sum() function accepts two parameters: a, and b, and returns a numeric. The data types of the two parameters are NUMERIC. By default, the parameter’s type of any parameter in PostgreSQL is IN parameter. You can pass the IN parameters to the function but you cannot get them back as a part of the result.

How do I run a stored procedure with parameters in PostgreSQL?

PostgreSQL Stored Procedures

1. We specify the name of function followed by the CREATE FUNCTION clause.
2. Provide a list of parameters inside the paretheses, also specifying each data type (integer, boolean, geometry, etc..)
3. RETURNS specifies the return type of the function.

How do I initialize a variable in PostgreSQL?

PostgreSQL: Declaring Variables

1. Syntax. The syntax to declare a variable in PostgreSQL is: DECLARE variable_name [ CONSTANT ] datatype [ NOT NULL ] [ { DEFAULT | := } initial_value ]
2. Example – Declaring a variable.
3. Example – Declaring a variable with an initial value (not a constant)
4. Example – Declaring a constant.

Can you declare a table as a parameter in Postgres?

You cannot declare a table as function parameter per se, since there are no table variables in Postgres. But there are various ways to achieve what you might want to achieve – which isn’t exactly clear yet. You can “pass” a table as

Can you pass a table to a function?

As far as I can tell (after googeling extensivly, because I had the same problem) you can’t pass a table directly to a function. However, as shown, you can transform a table into an array [] of a custom type that consists of several basic types (similar to a table definition).

How to create a stored procedure in PostgreSQL?

Create a stored procedure that takes data out of the staging table which matches the given session id and merges it with the target table.

Are there other ways to pass data to PostgreSQL?

As Evan mentioned, there are other ways of passing data to PostgreSQL but if you are looking for a cross platform solution then you will need to ensure that you only choose ANSI-compliant methods – unfortunately this does not include the SQL Server table-valued parameters.