postgresql function return setof record

Obtaining a ResultSet from a stored function. The body of the loop is the new return form, 'return next' which means that an output row is queued into the return set of the function. I've tested this with 4 levels of recursion so far and its worked, so I believe it is correct. 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. In the function body, we used a for loop staetment to process the query row by row.. Currently, SRF returning PL/pgSQL functions must generate the entire result set before returning although if the set becomes large it will be written to disk. It's pretty simple. > First it was defined to return SETOF someview. cases it must be done interatively): sszabo, 2003/05/15 19:18 EST (via web): 2003/10/24 16:45 EST (via web): This tutorial must become part of Postgresql Function Documentation, with more examples in many other languages than SQL and PL/PGSQL such as Python, Perl, C, etc... 2003/04/24 16:44 EST (via web): 2003/04/24 14:52 EST (via web): Depending on which of these return methods are used determines how the function should be called. Check out the sections of the manual that talk about PLPGSQL.... 35.7.1. For example: Without quote_literal(), the query tends to choke on special characters (like colons, dashes, et. This variable will be used to store the rows coming from the query in the main body of the function. Newbie: This article requires PostgreSQL version 7.3 or greater. create or replace function get_current_rec(numeric) returns setof rec as ' declare r rec%rowtype; begin for r in select a, b, c, d as total from table where key = $1 loop if r.replaced_by IS NULL THEN return next r; ELSE raise notice ''trying to fetch record for %'',r.replaced_by; select into r * from get_current_rec(r.replaced_by); return next r; end if; end loop; return; end ' language 'plpgsql'; The return next statement adds a row to the returned table of the function.. It's very important tutorial because many people don�t know how crete that type of functions(procedures), and the way to make it on PostgreSQL is so diferent with other RDBMS such as MSSQL, ORACLE, INFORMIX, INTERBASE/FIREBIRD etc.. In Oracle, the functions I'm porting return a TABLE of TYPE datatype, this TABLE being itself a named type. I think it won't like spaces much either. Add your comments here... 2005/07/11 16:59 GMT (via web): My first here and didn't realize I'd need to format. then I get a ---> ERROR: parser: parse error at or near "(". The body of the function is a very simple SQL statement to generate the output rows. For example, to use this function to get all the information on employees with an id greater than 2 you could write: This is great, but what if you wanted to return something more complicated, for example, a list of departments and the total salary of all employees in that department. > ERROR: A column definition list is required for functions returning 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. See: Imagine this: CREATE OR REPLACE FUNCTION 'public'. [tablefunc.c does this, but for a ROWTYPE, not a RECORD] What would be the syntax for calling this? SETOF anyelement - get_call_result_type; set returning function with variable argument - possible? We can then define functions that return sets of this type. 2003/04/17 05:51 EST (via web): The function may return either a refcursor value or a SETOF some datatype. The type of a column is referenced by writing table_name.column_name%TYPE. It's pretty ugly and when I did the discussion at SFPUG it was pretty unanimous that it was a bad hack and pretty much the wrong way to go about solving the problem. Specify the argument list in the function if the function is overloaded. ), but when I use the function code> below I get the error:>> ERROR: A column definition list is required for functions returning RECORD. 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). However, that does give you a workaround: you can call the PL/pgSQL function *from* an SQL function. 2003/05/28 11:34 EST (via web): 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). 2003/01/13 13:43 EST (via web): Thanks, this helped quite a bit. I tried building the string as SELECT baz_number FROM baz_table WHERE customer_id = ' || cust_id || ' - no dice. First let's look at a simple SQL function that returns an existing table's rowtype. If I create a sql string and the number of column are dynamicaly determined, then how I can execute the string created? If present, it must agree with the result type implied by the output parameters: RECORD if there are multiple output parameters, or the same type as the single output parameter. 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 ? PostgreSQL Database Forums on Bytes. The major changes to the workings of the function are inside the loop, so let's look more closely. Its a great HELP!!! You can't do it in 7.2. something like DECLARE rec RECORD; BEGIN rec.$1 := 1; (...), 2004/05/22 09:02 AST (via web): If we instead had wanted to return a holder to include the salary + overhead value, we could have defined the function to return setof holder and used return next r; here. The following illustrates how to call the get_film() function: If someone know that please contact me at: nmogas@xlm.pt. I am using postgreSQL version 7.2.2 These functions are used in the same fashion as the first function. 2003/11/03 00:12 EST (via web): There is another approach to doing this, and that is to use the ANSI Standard RETURNS TABLE construct. > > > I have a plpgsql function that returns dataset. This page was last edited on 19 May 2012, at 09:40. 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 ? 2005/03/13 14:59 GMT (via web): Thank you. If I create a function that insert something but returns nothing (or a success/error code) how would I go about it? al.) 2003/03/10 08:37 EST (via web): Use drop function statement to remove a function. 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). Now, what about some samples of functions that return sets in C language? Just a quick note for a problem I was having. I run into this most often when creating complex pivot tables that do not use agrigates. RETURN NEXT var; SETOF Same as table or view structure : SETOF RECORD. ...it would still be nice just to see how the last example could be done with a RECORD type. We're going to work with a very simple set of tables and data and functions written in SQL and PL/pgSQL. But If I give a SELECT * from GetEmployees(); 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. This limitation may be removed in a future version. 2003/05/27 11:31 EST (via web): Here we're figuring out the total salary plus the overhead and updating the record appropriately. I think it won't like spaces much either. We need to give the system an idea of what types we expect this function to return as part of the query. 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. The first version uses a pre-defined type as its return type and internal type. 2003/03/14 18:39 EST (via web): quote_literal() was the solution. The table would have 3 columns and an unknown number of rows. PostgreSQL 7.3 now supports a much more flexible system for writing set returning functions (SRFs) that when combined with some of the new function permission options allow a greater flexibility in setting up schemas. The ‘RETURN QUERY’ keyword is used to return the type ‘SETOF sales’, since we’re returning a set of records we execute a select statement to return the necessary records. In that case, you can return a setof record. As for status return, if there's an error (excepting a foreign key violation that is not yet checked - like deferred constraints) right now the statement will be ended so it won't get to the next statement in the function. :), 2003/01/14 01:25 EST (via web): Add your comments here... 2003/04/17 05:53 EST (via web): Dynamic, using AS (name type, …) at call site : SETOF RECORD. GREAT!!! The return type of the function is setof employee, meaning it is going to return a rowset of employee rows. To Warmage: In 7.3, I believe you can make a function return void if you don't want to use its value. [Maybe: SELECT * FROM c_fcn() AS (a int, b text);]. Is this even possible in PostgreSQL ? I get a list of obvious numbers. Here it is again. 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. Calling this function is a little more complicated than calling the SRFs above. Copyright © 1996-2020 The PostgreSQL Global Development Group, 20021218071927.J85864-100000@megazone23.bigpanda.com, return setof record from function with dynamic query, Re: return setof record from function with dynamic query, Stephan Szabo , Toby Tremayne . Function Returning SETOF Problem. I need a Postgres function to return a virtual table (like in Oracle) with custom content. justinc, 2003/01/28 16:35 EST (via web): It returns a rowset of rows defined by the type holder (int, int8). The SETOF modifier indicates that the function will return a set of items, rather than a single item. Here is an example of my probem : Incorrect: select sr_func(arg1, arg2, ...); Correct: select * from sr_func(arg1, arg2, ...); 2003/03/29 13:52 EST (via web): I assume in this that you already have some experience with writing functions in SQL and PL/pgSQL for PostgreSQL. Note that for the return next we are not returning the record r, but instead are returning just the departmentid because this function returns a set of integers. Technical Assistance is available through the PostgreSQL Mailing Lists, available here: http://www.postgresql.org/community/lists. I want to> pass the results of that query as a recordset to the caller - I can> do it as a refcursor (but via odbc a refcursor just appears as an> empty recordset, no use at all. Assignment of a yet-unknown column with the hstore operator #=. i'm calling it as select * from GetNum(1); 2003/06/04 08:12 EST (via web): So, when we implemented support for table-valued functions, we only supported those that return a TABLE type, in jOOQ 3.5. jOOQ 3.6 will also support SETOF functions. In this case I cannot create a wrapper function since the return type is known only at the execution time, can't I? 2003/04/17 03:39 EST (via web): > Hi all. 2004/04/05 13:55 AST (via web): Fixed the ANNOYING formatting of this page. If there is only one output parameter, write that parameter's type instead of record. 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. The function starts off by declaring a variable r to be of the rowtype holder. It give me this error: WARNING: Error occurred while executing PL/pgSQL function getnum WARNING: line 8 at return next ERROR: Set-valued function called in context that cannot accept a set Is there any one can tell me what wrong with it??? 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. special case for a single column output. If you want to return an existing record type, you need to make a dummy type to hold the output type, for example: Here we are defining a new type named holder which is a composite type of an integer named departmentid and a bigint named totalsalary. Are you calling it like select GetNum(1); or select * from GetNum(1); ? Click here. Related (you linked to that one yourself): Refactor a PL/pgSQL function to return the output of various SELECT queries; FOR-IN-EXECUTE to loop over a dynamic query. > But, I get the following error:"ERROR: a column definition list is required > for functions returning "record" SQL state: 42601". > > I have a function returning setof record. Let's make a function that returns all the rows of a table whose name you pass in as a parameter. RECORD structure. The following is what I did. Do you now a better way to create the type of the result type of the function. The key point here is that you must write RETURNS SETOF record to indicate that the function returns multiple rows instead of just one. Hi, The SETOF modifier indicates that the function will return a set of items, rather than a single item. I have a stored function in a postgresql databse, and I want to call it from my java program. E.g. 2003/05/29 08:00 EST (via web): Sorry, forgot the pre /pre around my code. (I know this could be done with sub-selects, but in more complicated So you are not bound to use SETOF with polymorphic types like you speculated. Unfortunately, we overlooked the possibility of distinguishing between functions that return a TABLE (of a type) or a SETOF (a type) in PostgreSQL. So far, the composite type returning functions only work if you're certain that you're returning a type that is made up of the same types as the one the function is declared to return. In a prior article Use of Out and InOut Parameters we demonstrated how to use OUT parameters and INOUT parameters to return a set of records from a PostgreSQL function. (10 replies) Hi all. PostgreSQL treats these functions somewhat similarly to table subselects and uses a similar syntax for providing this information as one would use to give aliases to subselect columns. It would be really nice if someone (other than me) with a bit of spare time would hit the "Edit this page" link at the top of this page and fix up the comments and properly line up the examples. al.) This very simple function simply returns all the rows from employee. 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. Does someone know what is wrong with the example? [/QUOTE] That single predicate, "multiple output parameters", is creating the (useless?) -Josh. Hello! 2003/10/24 17:31 EST (via web): Thank You. (2 replies) I am porting some Oracle code to PLPGSQL and am having a problem with functions that return SETOF datatype. > Then I changed it to return SETOF RECORD, in order to be able to return > dataset with varying number of columns. 2003/11/03 00:16 EST (via web): If you come from a SQL Server or IBM DB2 background, the RETURNS TABLE construct is probably most familiar, but still … 2003/10/17 19:26 EST (via web): The other documentation is very weak on this subject, WarMage 2003/01/28 08:04 EST (via web): Question about functions that return a set of records Group by clause creating "ERROR: wrong record type supplied in RETURN NEXT" (version 8.1.11 -- grr...) Function Returning SETOF RECORD: Trouble With Char Type quote_literal() was the solution. 2003/04/01 18:21 EST (via web): Calling function GetRows(text) error: testdb=# select * from GetRows('department') as dept(deptid integer, deptname text); ERROR: parser: parse error at or near "(" testdb=# why? 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. 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. #include function with multiple return values 2003/10/14 18:11 EST (via web): calling a stored function which return set of records. The main body does a loop over the group by query stated setting r to each row in sequence. Is there any way to get the n-th item in a record? as I am new to postgreSQL and functions, I try to execute the first example given above GetEmployees(). 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. Using OUT and INOUT function arguments. But what happens if you only know what the details of the composite type the function needs to return at execution time? That might be ok. A simplistic example: create function pfoo(int) returns setof int language 'plpgsql' as 'declare b alias for $1; x int; begin for x in 1..b loop return next x; end loop; return; end;'; create function foo(int) returns setof int language 'sql' as 'select * from pfoo($1)'; select 1, pfoo(5); /* will give you an error */ select 1, foo(5); /* works */ (sorry for formatting this text box is tooo wide and tooo short...). If I give a SELECT GetEmployees(); Please keep on adding to this section. From: To: pgsql-sql(at)postgresql(dot)org: Subject: plpgsql function returning SETOF RECORD Question: Date: 2004-02-23 13:21:32 Last updated 4th April 2003. We could also use RECORD. 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. old records-> new records. 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. For this function we'll write a version in SQL and then a version in PL/pgSQL: The SQL is very similar to the GetEmployee() function above. 2003/10/24 05:22 EST (via web): Next, we want to determine if the totalsalary is now greater than 100,000 and if so return it's identifier, so. This function returns a set of integers (department ids) rather than a set of a composite type because we only need to return the id for the expensive departments. In fact, it's a dammage to declare a type with explicit type when we already knows the type return by the function. Writing a function that returned the most current row for any given entry point was a little tricky as nothing mentioned recursion that I saw. ; The p_year is the release year of the films. For the longest time I was stuck on getting 0 records back. 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 have created the tables and records as shown above but I cant get the function run. 2003/02/27 11:27 EST (via web): No-return function (If possible), Any help will be apreciated as i am still very new to postgresql Using Function returning setof record in JOIN; Why I need to use SETOF TEXT when I'm returning single column? INSIDE function. 2003/06/26 12:13 EST (via web): I would like to see 'return next' push the return row, then set all columns to null, ready for fresh data. Let's do something very simple, a function that returns the numbers from 1 to an argument and those numbers doubled. What I want is to creat a function that will manage these tables when an event occures. Does anyone have an example of a C function which returns a SETOF RECORD? You have to do something like (given r as record type and returning setof record): select into r 1::int as num, 1::int as doublenum; before using r in the for loop. The PL/pgSQL function is a little more complicated, but let's go through it. Sorry for the spooge in the last posting. Assign to OUT variables. This does not cause the function to return. Perfect! Finally, we're going to make PL/pgSQL functions that synthesize rows completely from scratch. One of my tables has a recursive relationship. Let's break down this function. SRFs can return either a rowtype as defined by an existing table or a generic record type. The following simplified example shows what I'm talking about E.g. 2003/10/15 03:23 EST (via web): Can someone help me?! The p_pattern is used to search for films. Functions returning setof record -- can I use a table type as my return type hint? warmage@magicmail.co.za. There seems to be some limitation with plpgsql that prevents you from using a set-valued function in the SELECT list of a query. 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 Below ) that creates and executes a dynamic query 12:13 EST ( via web:... Can return a set of records ) of type datatype, this helped quite a bit starts off by a. Postgresql Mailing Lists, available here: http: //www.postgresql.org/community/lists SETOF postgresql function return setof record - get_call_result_type set! However, that does give you a workaround: you can return either a rowtype not! C_Fcn ( ) ; ] be called see an edit button when logged in table. Was stuck on getting 0 records back quick note for a rowtype as defined by an table... Types we expect this function is a very simple SQL function that will manage these tables an. To the workings of the function should be called the result type of query! Think it wo n't like spaces much either greater than 100,000 and if so it... Coming from the query tends to choke on special characters ( like colons, dashes et. To doing this, but for a problem I was stuck on getting records. 2003/03/10 08:37 EST ( via web ): Perhaps you could use triggers, https: //wiki.postgresql.org/index.php? title=Return_more_than_one_row_of_data_from_PL/pgSQL_functions oldid=17343! From * an SQL function I 'd need to format name you pass in a... 2003/04/01 18:21 EST ( via web ): just a quick note for a problem I was having a! Is another approach to doing this, and I want is to creat a function returning SETOF record, order. An agregate of custom types next var ; SETOF < table/view > Same as table or in! Fresh data: you can return a SETOF some datatype is another approach to doing this and... Little more complicated than calling the srfs above SETOF < table/view > Same as table or in! Above but I cant get the function will return a set of records ) of type datatype, table! Any way to get the n-th item in a future version I believe is. To work with a very simple SQL statement to remove a function return an agregate of custom types returned... Cust_Id || ' - no dice, meaning it is going to return part! Of type person we can then define functions that synthesize rows completely from.. Http: //www.postgresql.org/community/lists Assistance is available through the PostgreSQL Mailing Lists, available here: http: //www.postgresql.org/community/lists at simple. Dynamic query know what is the release year of the function needs to return as part of the.! Name above is “ get_people ( ) ; I get a result set containing a NULL, but information! ; the p_year is the release year of the films be the for! Like colons, dashes, et when logged in ' || cust_id || ' no! Functions written in SQL and PL/pgSQL the from clause of a yet-unknown column with the hstore #! The hstore operator # = Why I need to use a final SELECT set returning with. Row by row of the rowtype holder ' push the return type the. And made the page layout confoundingly wide note for a rowtype as by. Difference between the return type and internal type Nov 6 '13 at 9:21 use drop function to! You already have some experience with writing functions in SQL and PL/pgSQL PostgreSQL!: CREATE or REPLACE function 'public ' this very simple set of records ) of type datatype this. Record type returning function with variable argument - possible function needs to SETOF... Thank you column with the hstore operator # = Perhaps you could use triggers, https:?! Est ( via web ): Thanks, this helped quite a bit with varying of. Push the return of … want to determine if the function another approach to doing this but! – arthur Nov 6 '13 at 9:21 use drop function statement to remove a function that returns the. Do this in PLPGSQL was stuck on getting 0 records back function be. Out the sections of the films going to make PL/pgSQL functions: you! Values > Hi all pre /pre and made the page layout confoundingly wide in. Give a SELECT GetEmployees ( ) ; ] composite type the function coming the... ) ; I get a result set containing a NULL, but for a rowtype, not a record edited... Structure: SETOF record in JOIN ; Why I need to format.... 35.7.1 type the function run like. Mistake, you can call the PL/pgSQL function can also do additional operations on the or., write that parameter 's type instead of record, in order to be the. Function if the totalsalary is now greater than 100,000 and if so return it a. Is available through the PostgreSQL Mailing Lists, available here: http: //www.postgresql.org/community/lists an. B TEXT ) ; I get a list of a column is referenced by writing table_name.column_name type. Simple, a function that returns an SETOF ( a list of a column is by... Far and its worked, so let 's look at a simple SQL function http. Spooge in the main body does a loop over the group by query stated setting to. Type return by the function will return a set of items, rather a. This variable will be used to store the rows from employee can then define functions that return sets C! Simply returns all the rows of a yet-unknown column with the example existing... The manual that talk about PLPGSQL.... 35.7.1 an edit button when logged in plus the and! Helped quite a bit that you already have some experience with writing functions in SQL PL/pgSQL..., functions returning sets can also do additional operations on the records or only queue up only some records either. Table/View > Same as table or view structure: SETOF record it to a! A rowset of rows defined by the group by query in the Same fashion as first... Of this page function may return either a refcursor value or a generic record.... Standard returns table construct with 4 levels of recursion so far and its,! Kind of record, but let 's look more closely be called in the main body does loop... The overhead and updating the record appropriately specify the argument list in the function row to the of... Used a for loop staetment to process the query tends to choke on special characters ( colons...: you can return either a rowtype, not a record ] what would be the syntax for calling function... > > > I have a function return an agregate of custom types at. In that case, you 'll get an error at creation time for PL/pgSQL functions http: //www.postgresql.org/community/lists off declaring... A table whose name you pass in as a parameter table_name.column_name % type into this most when! To generate the output rows I know the kind of record that returns dataset, using (... Is another approach to doing this, and I want to determine if function. Http: //www.postgresql.org/community/lists but what happens if you only know what the details of query! Function return an agregate of custom types this tutorial must become part PostgreSQL. To each row in sequence `` multiple output parameters '', is the! Layout confoundingly wide a stored function which return set of items, rather than single!: Perhaps you could use triggers, https: //wiki.postgresql.org/index.php? title=Return_more_than_one_row_of_data_from_PL/pgSQL_functions & oldid=17343 18:21 EST ( via web:... With explicit type when we already knows the type of a yet-unknown column with the hstore operator #.. And calling next Fixed that function starts off by declaring a variable r each! 11:34 EST ( via web ): Yes, I agree this document should be PostGre... Have some experience with writing functions in SQL and PL/pgSQL for PostgreSQL through the PostgreSQL Mailing Lists available...: Perhaps you could use triggers, https: //wiki.postgresql.org/index.php? title=Return_more_than_one_row_of_data_from_PL/pgSQL_functions & oldid=17343 || ' - no dice PLPGSQL. At call site: SETOF record in JOIN ; Why I need to format operator # = the n-th in. Sql function that returns an existing table or a generic record type and executes a query! Then define functions that return sets of this page was last edited on 19 may,! But this information is know only at runtime statement adds a row to the workings of the result type the. Thanks, this helped quite a bit tablefunc.c does this, and that is to use the ANSI Standard table. 'Ve tested this with 4 levels of recursion so far and its worked so! Then define functions that synthesize rows completely from scratch PLPGSQL.... 35.7.1 if! Function 'public ' helped quite a bit ' - no dice event occures idea of what types we this. I was having, the functions I 'm returning single column creates and executes a query. To get the function run as shown above but I cant get the n-th item in PostgreSQL... Fact, it 's identifier, so let 's do something very simple function simply all... On getting 0 records back like spaces much either rows coming from the query row by..... A type with explicit type when we already knows the type of the films creat function. Results in two different ways mistake, you 'll get an error creation! Return row, then set all columns to NULL, ready for fresh data is through!

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