Im trying to migrate an oracle procedure to a postgresql function. Here's the function in postgres:
CREATE OR REPLACE FUNCTION tibrptsassure.call_reasons(i_start_date date, i_end_date date, i_intnbr character varying, i_intmodnbr character varying, oc_ref_cursor refcursor)
RETURNS refcursor AS
$BODY$
BEGIN
OPEN oc_ref_cursor FOR
SELECT COUNT(1),INTERACTION_NBR,INTERACTION_ID,INTERACTION_MODULE_NBR,CREATED_BY
FROM tibrptsassure.d_tcare_interaction , tibrptsassure.d_calendar d
WHERE INTERACTION_ID = i_intnbr
AND INTERACTION_MODULE_NBR = i_intmodnbr AND INTERACTION_DATE BETWEEN i_start_date AND i_end_date
AND INTERACTION_DATE BETWEEN d.week_start_date AND d.week_end_date
GROUP BY INTERACTION_NBR;
return oc_ref_cursor;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
But, while executing this function, I dint get any output. Got a message: Query result with 1 row discarded.
begin;
select tibrptsassure.sampleproc_call('10-Feb-2010','31-Dec-2013','30681','Bypass_IDV','funccursor');
FETCH ALL IN "funccursor" ;
COMMIT;
Whats wrong in the query?
This is an issue with pgAdmin and multi-statement transactions. Use psql instead.
Basically pgAdmin doesn't know what to do at that point and so it discards the row and you can't with cursors outside such an environment.
Related
If I have a TABLE named MyTable which has columns say C1(type date) and C2 (type character) I want to create a stored function that takes an input and the input should always belong to C1, and the output of the stored function should be the corresponding element in C2. I have tried to do it using the 'select' statement followed by 'where' clause inside the stored function but was not able to achieve it. Is there any other way to accomplish this task.
DELIMITER $$
CREATE FUNCTION `MyFunction`
(`Date` datetime)
RETURNS char(10)
BEGIN
DECLARE MyVariable char(10)
SELECT MyVariable = `C2`
FROM MyTable
WHERE `Date` = `C1`; RETURN MyVariable;
END$$
DELIMITER ;
But this keeps giving me ERROR CODE: 1064
At first glance, I see a syntax error:
...
BEGIN
DECLARE MyVariable char(10) <-- needs a semicolon here
SELECT MyVariable = `C2`
...
Every statement within the body of your routine must end with a semicolon. See examples of DECLARE in this manual page: https://dev.mysql.com/doc/refman/8.0/en/local-variable-scope.html
It should be like this:
...
BEGIN
DECLARE MyVariable char(10);
SELECT MyVariable = `C2`
...
Re your comment:
Error 1415 means "cannot return a result set". Your stored function is doing a SELECT without putting the result into your declared local variable using an INTO keyword.
You appear to be trying to set the value of MyVariable using = but that's just making a comparison. It doesn't assign anything to MyVariable.
Without using INTO to assign the variable, your SELECT statement is by default returning a result set. This is allowed in a stored procedure, but not in a stored function. A stored function must return a single scalar value, not a result set.
...
BEGIN
DECLARE MyVariable char(10);
SELECT `C2` INTO MyVariable
FROM MyTable
WHERE `Date` = `C1`;
RETURN MyVariable;
END
P.S.: I edited your question to replace the term "user-defined function" with "stored function". These are two different things in MySQL. You are writing a stored function.
In MySQL, they use the term user-defined function (UDF) for a function you implement in C/C++ code and compile into the MySQL server. It's less common for developers to write this type of extension.
I'm trying to use the "RETURNING" keyword after an INSERT statement to allow to return the inserted row data as json - I want all the fields. Here is what I tried with no success:
CREATE OR REPLACE FUNCTION createUser(
email_f character varying(50),
nickname_f character varying(16)
) RETURNS json AS $$
BEGIN
INSERT INTO users (email,nickname)
SELECT email_f,nickname_f
RETURNING row_to_json(row(*));
END;
$$ LANGUAGE 'plpgsql';
This gives me an error: ERROR: syntax error at or near "*"
What could I be doing wrong here? I would like to continue using the "Returning" keyword as it seems to be the best way to go about it - provided I can get it to work...
You may have more success with:
row_to_json(users.*)
You can do it properly using a middle variable:
CREATE OR REPLACE FUNCTION createUser(
email_f character varying(50),
nickname_f character varying(16)
) RETURNS json AS $$
declare temp_variable users%rowtype;
BEGIN
INSERT INTO users (email,nickname)
SELECT email_f,nickname_f
RETURNING *
into temp_variable;
return row_to_json(temp_variable);
END;
$$ LANGUAGE 'plpgsql';
RETURNING *
I am trying to have a conditional change in a parameter for update statement.
I am getting the following error when I try the following function
/home/y/bin/mysql -u root < testpri.sql > out
ERROR 1415 (0A000) at line 4: Not allowed to return a result set from a function
Contents of testpri.sql are as follows:
use `zestdb`;
DROP FUNCTION IF EXISTS UPDATEPASSWD;
DELIMITER //
CREATE FUNCTION UPDATEPASSWD(n INT) RETURNS varchar(255) DETERMINISTIC
BEGIN
DECLARE mypasswd varchar(255);
IF (n = 1) THEN
SET mypasswd = '12ccc1e5c3c9203af7752f937fca4ea6263f07a5';
SELECT 'n is 1' AS ' ';
ELSE
SET mypasswd = '1a7bc371cc108075cf8115918547c3019bf97e5d';
SELECT 'n is 0' AS ' ';
END IF;>
SELECT CONCAT('mypasswd is ', mypasswd) AS ' ';
RETURN mypasswd;
END //
DELIMITER ;
CALL UPDATEPASSWD(0);
What am I missing?
I think it's actually your debugging SELECT calls.
From the docs:
Statements that return a result set can be used within a stored procedure but not within a stored function. This prohibition includes SELECT statements that do not have an INTO var_list clause...
I arrived in search of answers to the same question, and found another way to work around the issue, so that I can use the SELECT statement that is the heart and soul of the MySQL function that elicited the warning.
Consider the following snippet.
SET intNMatches = ( SELECT COUNT(*) ...
SET coerces the SELECT statement to return its one and only column, a row count, into intNMatches, a local variable cast to BIGINT. Since it contains trade secrets, I can't show the rest of the query. Suffice it to say that the query installs without causing the MySQL engine to issue a warning.
I need to execute an EF LINQ query that adds some seconds to a datetime against MySQL using the standard Oracle supplied dot net connector. Unfortunately it does not support the EntityFunctions.AddSeconds method. Is there an alternative approach?
var result = (from rec in db.Records where EntityFunctions.AddSeconds(rec.SomeDate, rec.SomeSeconds) select rec).FirstOrDefault();
DELIMITER $$
drop function IF EXISTS AddSeconds$$
create function AddSeconds(theDate datetime, seconds int)
RETURNS datetime
DETERMINISTIC
begin
return DATE_ADD(theDate, INTERVAL seconds SECOND);
end$$
I'm writing a stored procedure that uses multiple IF / THEN statements that also need to execute multiple queries if they evaluate to true. Problem is, I can't seem to find any examples of the appropriate syntax. From the MySQL dev handbook, it seems like I could have multiple queries in the "statement_list," but so far I can't get it to work.
Here's what I'm trying to do:
SET agency =
COALESCE((SELECT org_agency_o_id
FROM orgs_agencies
WHERE org_agency_code = maj_agency_cat)
,(SELECT min(org_id)
FROM orgs
WHERE org_name LIKE CONCAT('U.S.',SUBSTRING(maj_agency_cat,5))))
IF agency IS NULL THEN
-- execute multiple queries
INSERT INTO orgs (org_name
,org_name_length
,org_type
,org_sub_types)
VALUES (CONCAT('U.S. ',SUBSTRING(maj_agency_cat,5))
,LENGTH(CONCAT('U.S. ',SUBSTRING(maj_agency_cat,5)))
,'org','Org,GovernmentEntity,Federal,Agency');
SET agency = LAST_INSERT_ID();
END IF;
The error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IF agency IS NULL THEN
INSERT INTO orgs (org_name,org_name_length,org_type,' at line 53
Any ideas? I know it has to be something simple, so I would greatly appreciate anybody's input.
You got a few issues as far as I can see:
As David pointed out, each and every statement needs to be terminated by a ;
If you do a SELECT, better make sure it can only select one value by doing a LIMIT 1; If you've got an aggregate function like min() then only one value can come out.
If you writing the procedure using the CREATE PROCEDURE ... syntax, don't forget to set DELIMITER $$ before the CREATE PROCEDURE ... END $$ body and a DELIMITER ; after.
If you have multiple statements inside your IF THEN ... END IF block, it's a good idea to put them inside a BEGIN ... END; block.
If you have a return value, like agency here, why not make it a FUNCTION name (arg1: INTEGER) RETURNS INTEGER instead of a PROCEDURE name (IN arg1 INTEGER, OUT agency INTEGER). The function is much more versatile.
DELIMITER $$
CREATE PROCEDURE name(arg1 INTEGER, arg2 INTEGER, ...)
BEGIN
SELECT SET agency =
COALESCE((SELECT org_agency_o_id
FROM orgs_agencies
WHERE org_agency_code = maj_agency_cat) LIMIT 1,
(SELECT min(org_id) FROM orgs
WHERE org_name LIKE CONCAT('U.S.',SUBSTRING(maj_agency_cat,5))));
IF agency IS NULL THEN BEGIN
-- execute multiple queries
INSERT INTO orgs (org_name
,org_name_length
,org_type
,org_sub_types)
VALUES (CONCAT('U.S. ',SUBSTRING(maj_agency_cat,5))
,LENGTH(CONCAT('U.S. ',SUBSTRING(maj_agency_cat,5)))
,'org','Org,GovernmentEntity,Federal,Agency');
SET agency = LAST_INSERT_ID();
END; END IF;
END $$
DELIMITER ;
No semicolon after your first SET statement.