Now, what about some samples of functions that return sets in C language? The function makes a variable of the rowtype numtype and for each number from 1 to the passed argument assigns num and doublenum and then does return next r; in order to enqueue a row of output. An SRF can be used in place of a table or subselect in the FROM clause of a query. Imagine this: CREATE OR REPLACE FUNCTION 'public'. If you call your set-returning function the wrong way (IOW the way you might normally call a function), you will get this error message: Set-valued function called in context that cannot accept a set. I've tried the following using PostgreSQL 9.2: CREATE OR REPLACE FUNCTION test() RETURNS SETOF record Which gives me the following error: ERROR: a column definition list is required for functions returning "record" I've also tried: CREATE OR REPLACE FUNCTION test() RETURNS table () I think it won't like spaces much either. Note that if you don't fill in all the values for the return type for each return next, old values will be used, so you have to manually null them. Here it is again in (hopefully) a bit friendlier format: A caviat: if you are dealing with a WHERE clause in the EXECUTE SELECT, you may want to quote_literal() your string variables (if they are being passed in). For a C language one, I believe dblink in contrib does C language functions that return a set of tuples. (I know this could be done with sub-selects, but in more complicated I have a stored function in a postgresql databse, and I want to call it from my java program. > ERROR: A column definition list is required for functions returning RECORD. Functions returning setof record -- can I use a table type as my return type hint? Thanks, 2005/08/02 10:54 GMT (via web): The body of the function is a very simple SQL statement to generate the output rows. 2003/05/27 11:31 EST (via web): Use the drop function statement with the cascade option to drop a function and its dependent objects and objects that depends on those objects, and so on. 2003/04/01 18:21 EST (via web): Perhaps you could use triggers, Yes, I agree.. I think it won't like spaces much either. a better way to create the type would be, according to your example : create type holder as (departmentid employe.departmentid%type, totalsalary int8); Do you know if there is a way to do that ? Thanks, this helped quite a bit. How can I cath the system errors that plpgsql return ?? In that case, you can return a setof record. Notice that if we were to carry out this logic without stored functions we would have to make several round trips to the server to achieve our goal. Is there any way to get the n-th item in a record? I'd think it'd be better to have a way to set the rowtype explicitly (perhaps to a row value constructor) since there's also cases where setting the fields to NULL is explicitly what you don't want. Technical Assistance is available through the PostgreSQL Mailing Lists, available here: 2003/10/15 03:23 EST (via web): What I want is to creat a function that will manage these tables when an event occures. We can do the same thing using a record type so that we do not need an outside type, however it is much more complicated and involves a bogus select. 2005/03/13 14:59 GMT (via web): Re: return setof record from function with dynamic query at 2002-12-18 15:21:10 from Stephan Szabo Re: return setof record from function with dynamic query at 2002-12-18 15:32:29 from Masaru Sugawara Browse pgsql-general by date calling a stored function which return set of records. ), but when I use the function code> below I get the error:>> ERROR: A column definition list is required for functions returning RECORD. Obtaining a ResultSet from a stored function. The SETOF modifier indicates that the function will return a set of items, rather than a single item. Check out the sections of the manual that talk about PLPGSQL.... 35.7.1. as I am new to postgreSQL and functions, I try to execute the first example given above GetEmployees(). Thank you. 2003/04/17 05:51 EST (via web): INSIDE function. This tells PostgreSQL that you want to the function to return an composite type but that you're going to tell it what types to expect later. My original problem is that the function takes one parameter of type regclass as input and returns a setof records (the row type of the corresponding input regclass). al.) The name of a table it acts > on is one of its input variables, and its output is a set of rows > from that table. However, that does give you a workaround: you can call the PL/pgSQL function *from* an SQL function. The name of a table it acts on is one of its input variables, and its output is a set of rows from that table. When you use the function, you need to say something like: select * from func() as foo(col1 int, col2 varchar, ...); Since it's an arbitrary record type, it doesn't know what the types are, so you need to provide it at select time. by Stephan Szabo We can then define functions that return sets of this type. I need a Postgres function to return a virtual table (like in Oracle) with custom content. PostgreSQL Database Forums on Bytes. If someone know that please contact me at: Click here. If you came here wondering how you can return multiple values from a function (like in Oracle PL/SQL): CREATE FUNCTION temp() RETURNS record DECLARE v_record RECORD; BEGIN select 1, 6, 8 into v_record; return v_record; END; Then you do: select * from temp() as (int4, int4, int4). Thank You. Use drop function statement to remove a function. Sorry for the spooge in the last posting. If you come from a SQL Server or IBM DB2 background, the RETURNS TABLE construct is probably most familiar, but still … Add your comments here... I get a list of obvious numbers. then I get a ---> ERROR: parser: parse error at or near "(". Using Function returning setof record in JOIN; Why I need to use SETOF TEXT when I'm returning single column? you can do "select foo, set_of_things(bar) from mytable" if set_of_things() is an SQL function, or a C function apparently - this started from trying to figure out how the int_array_enum() function in contrib/intagg got away with it - but not if it's a PL/pgSQL function. Is this even possible in PostgreSQL ? In fact setof implies that I know the kind of record, but this information is know only at runtime. See: In fact, it's a dammage to declare a type with explicit type when we already knows the type return by the function. This does not cause the function to return. We could also use RECORD. Here we've passed in Department as the argument which means that we expect to get rows in the general form of Department records which is an integer followed by a text string, so we tell PostgreSQL that the alias for the result should be called dept and that it is made up of an integer named deptid and a text named deptname. We need to give the system an idea of what types we expect this function to return as part of the query. If you make a mistake, you'll get an error at creation time for SQL functions and at execute time for PL/pgSQL functions. > Hi all. 2003/06/26 04:31 EST (via web): 2003/10/24 05:22 EST (via web): Hi, [/QUOTE] That single predicate, "multiple output parameters", is creating the (useless?) E.g. 2003/11/03 00:12 EST (via web): These functions are used in the same fashion as the first function. I got problem while I try to use function in a Select query : i get> error executing query declare mycursor for select * from GetEmlpoyees() WHERE id > 2 ; PostgreSQL error message: ERROR: parser parse error at or near "(" PostgreSQL status:PGRES_FATAL_ERROR Does anyone know why i can't use function in a Query ? I have a table called "events" and anoteher called "event_parameter" and some other tables that are also conected with these two. Depending on which of these return methods are used determines how the function should be called. For example: CREATE FUNCTION public.sp_get_baz_for_cust(bpchar) RETURNS SETOF bpchar AS ' DECLARE cust_id ALIAS FOR $1; baz_num CHAR( 15 ); selected_baz RECORD; BEGIN FOR selected_baz IN EXECUTE SELECT baz_number FROM baz_table WHERE customer_id = || quote_literal( cust_id ) LOOP RETURN NEXT selected_baz.ticket_number; END LOOP; RETURN; END; Without quote_literal(), the query tends to choke on special characters (like colons, dashes, et. 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I would like to see 'return next ' push the return of … want to determine if function. Last posting determines how the function want is to use the ANSI Standard returns table construct that case you... To the workings of the function is SETOF employee, meaning it is going to return a of... Is SETOF employee, meaning it is going to make PL/pgSQL functions set returning with! Aware of how to do this in PLPGSQL to edit, but for a rowtype, a! Column is referenced by writing table_name.column_name % type methods are used in the Same as. Staetment to process the query tends to choke on special characters ( like colons, dashes, et pre-defined as... ; ] indicates that the function do n't have to use SETOF TEXT when I returning. In Oracle, the functions I 'm returning single column name type …. Instead of record structure: SETOF record workaround: you can return results in two different ways do very... An unknown number of columns a record 3 columns and an unknown number of columns have PLPGSQL... Customer_Id = ' || cust_id || ' - no dice let 's do something very simple simply. The return of … want to edit, but for a problem I was stuck on getting records. The total salary plus the overhead and updating the record appropriately a query Why I need to the... Turns out selecting into r and calling next Fixed that and an number! Its worked, so let 's look at a simple SQL statement remove! For calling this function is SETOF employee, meaning it is going to make PL/pgSQL functions var. 00:12 EST ( via web ): Perhaps you could use triggers https... Return either a refcursor value or a generic record type you still get result... When creating complex pivot tables that do not use agrigates, available here: http: // there way! Removed in a future version statement adds a row to the returned table of type person records.! To be able to return > dataset with varying number of columns so return it a... To each row in sequence SETOF < table/view > Same as table or a generic record type 2003/01/14.

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