How to call nested Stored precedure in redshift?
I have bunch sql queries, where I need to ignore error and run next set of queries.
Ignore an error that occurs in a redshift stored procedure
This link I have gone through where if stored procedure will be executed as single command if exception occurs further statements wont continue.
I am thinking of having multiple sub SP inside the master SP like as below,
create or replace PROCEDURE schema.master_sp(var int4)
LANGUAGE plpgsql
AS $$
BEGIN
create or replace procedure schema.sp1(var int4)
Language plpgsql
AS $$
BEGIN
...statements
END;
CREATE OR REPLACE PROCEDURE schema.sp2(var int4)
Language plpgsql
AS $$
BEGIN
END;
END
$$
;
Can I run like this, if sub SP is used will all sql queries inside SP runs without exiting if exception occurs..
If any other way please let me know...
Thanks
Tried with sub nested SP, it is throwing error...
Related
I have some MariaDb maintenance scripts that have the form:
DELIMITER //
CREATE PROCEDURE SAMPLE_TASK(OUT RESULT BOOLEAN)
BEGIN
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
SELECT 'Error running SAMPLE_TASK';
SHOW ERRORS;
SET RESULT=FALSE;
END;
-- DO SOMETHING HERE
SET RESULT=TRUE;
END //
DELIMITER ;
DELIMITER //
CREATE PROCEDURE RUN_TASKS()
BEGIN
DECLARE SUCCESS BOOLEAN DEFAULT TRUE;
IF (SUCCESS) THEN
CALL SAMPLE_TASK(SUCCESS);
END IF;
IF (SUCCESS) THEN
CALL SAMPLE_TASK2(SUCCESS);
END IF;
END //
DELIMITER ;
CALL RUN_TASKS();
The gist of it is that there are a series of tasks that are broken out into stored procedures. We want to execute each in turn aborting if we encounter an error.
This has worked well for us until now due to the fact one of our tasks we want to add will modify triggers, and it seems that creating a trigger within a stored procedure is not supported.
Since we can't add triggers in the stored procedures we are looking to do it outside of them, such as by adding a CREATE TRIGGER statement after the call to RUN_TASKS. The problem we have with that is that we can't find a way to handle errors at that level. From what I've been able to find declaring handlers can only be done at the procedure level, and MariaDb doesn't seem to offer try/catch like some some other DB products.
So the questions are: 1) Does anyone know how to create a trigger from within a stored procedure? 2) How do you add error handling outside of a stored procedure? Thanks
I would like to create four databases in for-loop. However, I got an error. Could you help me to resolve this problem ?
DO $$
BEGIN
FOR counter IN 1..2 LOOP
CREATE DATABASE 'database_name_%', counter;
END LOOP;
END; $$
ERROR: syntax error at or near "'Counter: %'"
LINE 4: CREATE DATABASE 'Counter: %', counter;
From documentation for the CREATE DATABASE command:
CREATE DATABASE cannot be executed inside a transaction block.
And since:
PostgreSQL actually treats every SQL statement as being executed within a transaction. If you do not issue a BEGIN command, then each individual statement has an implicit BEGIN and (if successful) COMMIT wrapped around it. A group of statements surrounded by BEGIN and COMMIT is sometimes called a transaction block
You can't create database in functions. So even if you can handle current problem, you won't be able to execute this function.
I created a simple stored procedure for testing purposes in Netezza that returns a string. When I call it from a select statement, it works fine, unless I call it more than once on multiple columns. I get the error:
ERROR [HY000] ERROR: Can't use a stored procedure in this context.
Is this not allowed?
Stored procedure:
CREATE OR REPLACE PROCEDURE SP_TEST_PROC(VARCHAR(ANY))
RETURNS VARCHAR(32)
EXECUTE AS OWNER
LANGUAGE NZPLSQL AS
BEGIN_PROC
DECLARE
TEST_PAR ALIAS FOR $1;
BEGIN
RETURN 'A' || TEST_PAR;
END;
END_PROC;
How I call it:
SELECT SP_TEST_PROC('abc') as test1, sp_test_proc('def') as test2
You cannot call more than one stored procedure in a SELECT. There are a couple of ways that you can call a Netezza stored procedure:
CALL SP_TEST_PROC('abc');
EXEC SP_TEST_PROC('abc');
SELECT SP_TEST_PROC('abc');
However, the you cannot have a FROM clause when using SELECT. The SELECT form is just a synonym for one of the other forms, and is not really a SELECT as we would normally think of one.
You can find the documentation on calling a stored procedure here.
If you are looking for a scalar function, then you are probably better served by writing a UDF. However, UDFs in Netezza do not support NZPLSQL as a language. You would have to write it in one of the supported UDF languages (e.g C++ or Lua).
To execute a stored procedure you must run this command:
EXECUTE SP_TEST_PROC('abc')
EXECUTE SP_TEST_PROC('def')
and not as you've written:
SELECT SP_TEST_PROC('abc') as test1, sp_test_proc('def') as test2
You can go here for an example
I'm new to PostgresSQL programming and am trying to create a function called update_docket so that I can call it from an existing stored procedure.
With the help of some great StackOverflow folks I was able to build my update statement as follows:
UPDATE incode_warrants iw
SET warn_docket_no = iv.viol_docket_no
FROM incode_warrantvs iwvs
JOIN incode_violations iv ON iv.viol_citation_no = iwvs.warnv_citation_no
AND iv.viol_viol_no = iwvs.warnv_viol_no
WHERE iw.warn_rid = iwvs.warnv_rid;
In Navicat (My Postgresql interface) I run this query on the database and I get a return message of Affected Rows with a count.
Now I want to take this query and build a function but I'm unsure as to what I should use as the return value. I was guessing at int4, and I tried to build it with return value void but nothing seems to work.
Can someone point me in the right direction of how to create this function so that I can call it from within a very large stored procedure?
I've looked at the Postgresql manual and am admittedly a bit confused and intimidated as I'm not much of a SQL guy.
I believe in the function I need a BEGIN and END for the transaction and I've even tried return 1; but so far I haven't had any luck in successfully saving this function.
Thanks!
Thank you but I am not sure what code you are running. But, if you are doing a generic stored procedure in postgres, you could do something like this:
CREATE OR REPLACE FUNCTION my_function([parameters to be used in stored procedure, if any])
RETURNS boolean AS -- [or you can have it return any data type such as integer]
$BODY$
DECLARE
some_variable text;
some_other_variable integer;
another_variable timestamp;
BEGIN
/*
Put stored procedure here, in this case it would be your update statement
*/
RETURN true; -- or you can return whatever you want based on what you declare above under RETURNS
END; -- closes the BEGIN clause
$BODY$ -- this is simply a delimiter to open and close the actual procedure that runs
LANGUAGE plpgsql;
Hopefully that gives you some idea.... But it would be helpful if you posted whatever you were trying to run.
I got error while creating procedure in db2.
Error is - Expected tokens may include: psm_semicolon.. SQLCODE=-104
Help Me....
CREATE PROCEDURE update_new()
LANGUAGE SQL
BEGIN
CREATE TABLE TEMP(METADATA_KEY varchar(40),NEW_METADATA_KEY varchar(40));
END;
In whatever tool you're using, change the statement terminator to something other than semicolon and put that terminator at the end of the CREATE PROCEDURE statement.
For example, if using the command line processor, save this to a file (note the "#" symbol at the end:
CREATE PROCEDURE update_new()
LANGUAGE SQL
BEGIN
CREATE TABLE TEMP(METADATA_KEY varchar(40),NEW_METADATA_KEY varchar(40));
END#
then execute the file: db2 -td# -f myproc.sql
The reason for doing this is that semicolons are always used as terminators within the procedure code, so you must use something else to terminate the CREATE PROCEDURE statement.