Note that postgresql does not have stored procedure, they have function. The following is the result: Notice that if you call the function using the following statement: SELECT get_film ('Al%'); PostgreSQL returns a table with … The following example creates an alias for a column name using AS. If you think about that restriction for a while it does makes sense. (See DISTINCT Clause below.) Coming from Microsoft SQL Server, I keep on forgetting how to return a resultset from a stored procedure in postgresql. Some other database systems offer a FROM option in which the target table is supposed to be listed again within FROM.That is not how PostgreSQL interprets FROM.Be careful when porting applications that use this extension. * PostgreSQL Stored Procedures and Functions - Getting Started To return one or more result sets (cursors in terms of PostgreSQL), you have to use refcursor return type. Using the operators UNION, INTERSECT, ... PostgreSQL allows it in any SELECT query as well as in sub-SELECTs, but this is an extension. table_name being the target of the INSERT command. The syntax of the RETURNING list is identical to that of the output list of SELECT. Because the data type of release_year column from the film table is not integer, you need to cast it to an integer using the cast operator ::. I mentioned this in passing in a few of my talks that touch on PostgreSQL recently, and it often gets twitter comment so here's a quick example of the RETURNING keyword in PostgreSQL. Any expression using the table's columns, and/or columns of other tables mentioned in USING, can be computed. This would be simpler for UPDATE, where additional rows joined into the update are visible to the RETURNING clause:. For example, SELECT x, generate_series(1,5) AS g FROM tab; is almost equivalent to Use PL/pgSQL in PostgreSQL outside of a stored procedure or function? The select clause is returning rows and a certain number of columns, each row.column location is a single position within a grid. The newest releases of PostgreSQL are … zsheep already provided an example. The optional RETURNING clause causes DELETE to compute and return value(s) based on each row actually deleted. SELECT * FROM get_film ('Al%'); We called the get_film(varchar) function to get all films whose title starts with Al. This command conforms to the SQL standard, except that the FROM and RETURNING clauses are PostgreSQL extensions, as is the ability to use WITH with UPDATE.. Consider a DO statement to run ad-hoc plpgsql code without passing or returning anything. Here is a small sample of how to do it. PostgreSQL 's behavior for a set-returning function in a query's select list is almost exactly the same as if the set-returning function had been written in a LATERAL FROM-clause item instead. The RETURNING keyword in PostgreSQL gives an opportunity to return from the insert or update statement the values of any columns after the insert or update was run. The alias is displayed when the query returns … Note that the columns in the result set must be the same as the columns in the table defined after the returns table clause. Both stored procedures and user-defined functions are created with CREATE FUNCTION statement in PostgreSQL. SELECT ALL (the default) will return all candidate rows, including duplicates. They are equivalent. Compatibility. Needs a bit more code than SQL Server. Select alias from column. SELECT raises exception in PL/pgSQL function; A PROCEDURE (Postgres 11 or later) returns a single row if it has any arguments with the INOUT mode. The RETURNING keyword in PostgreSQL gives you an opportunity to return, from the insert or update statement, the values of any columns after the insert or update was run. 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