Im at a loss right now because even on the most simple statement,
BEGIN
DECLARE rs1 CURSOR WITH RETURN FOR
select * from table1;
END
WITH RETURN is generating a
SQL Error [42613]: [SQL0628] Clauses not valid in same definition.
The Documentation https://www.ibm.com/docs/en/i/7.3?topic=codes-listing-sql-messages says:
Clauses specified to define the attributes of a column, a sourced function, a procedure, a trigger, or an index are not valid. One of the following has occurred:
WITH RETURN is specified for a cursor in a compound (dynamic) statement.
How is this Select statement supposed to be called for a Cursor without being considered a dynamic statement?
See documentation
WITH RETURN
Specifies that the result table of the cursor is intended to be used as a procedure result set. If the DECLARE CURSOR statement is not
contained within the source code for a procedure, the clause is
ignored.
Related
I am trying to use a simple IF ELSE query to test a feature with DB2 SQL. However when I attempt to execute it, I run into an error stating that I am not allowed to execute DDL statements.
What is throwing me off is that as far as I know, only database structure altering statements are considered DDL statements.
What gives?
Code:
IF 'True' = 'True' THEN
SELECT * FROM RM_TRANSACTION
FETCH FIRST 2 ROWS ONLY
FOR READ ONLY WITH UR
ELSE
SELECT * FROM RM_TRANSACTION
FETCH FIRST 4 ROWS ONLY
FOR READ ONLY WITH UR
END IF
https://imgur.com/a/58RYjpu
The problem is that you can’t ‘select to nowhere’ in a compound statement in DB2. Db2 CLP can return you the result set of a single sql statement, but it doesn’t try to do the same for select statements in a compound statement.
If you want to print the result set from a select statement in a compound statement, you can, for example, declare a cursor, fetch it in a loop, and use dbms_output.put_line calls to print the values of variables.
I am inside a SQLScript procedure and would like to return the last SQL Statement from this procedure, like the last rowcount:
/********* Begin Procedure Script ************/
BEGIN
select 1 as "my_data" from dummy;
select '::last_SQL' as "last executed sql" from dummy;
select ::ROWCOUNT as "rowcount" from dummy;
END;
/********* End Procedure Script ************/
The column "last executed SQL" should be populated with select 1 as "my_data" from dummy in this case. Is there any variable holding the last statement (or any easy way to retrieve the query plan)?
Maybe you can query sys.m_sql_plan_cache system view
Please check following SELECT statement
select
statement_string, last_execution_timestamp
from SYS.M_SQL_PLAN_CACHE
where user_name = 'KODYAZ'
order by last_execution_timestamp desc;
I believe you can improve the query by introducing new filter criteria.
There is no way to programmatically get the last executed SQL statement in SQLScript. This is due to the fact that not all statements will be executed in the form and order as they appear in the source code.
If you want to analyse the performance of a procedure, you can run PlanViz against the procedure call. Generally, there is no such thing as "the performance of a procedure/function" as they always occur in a specific context.
If used within a SQL query, things like query-transformation can radically change the way certain results are computed.
I have a requirement where-in I need to read a table (table name provided as input parameter of the SP), store the results in a temp table and then store the count of the read table into a variable. Please advise how can this be achieved. I have been able to read the table and its count using dynamic query but am not able to put the results in a temp table/ variable. 'Select' and 'Into' clauses do not seem to be working with 'Execute Immediate'. Thanks.
It is not very clear to me exactly what is being asked, but you should be able to execute a SELECT statement in the following manner:
CREATE PROCEDURE p1(IN tablename VARCHAR) AS
BEGIN
execute immediate 'SELECT * FROM ' || :tablename;
END;
Then the following statements create a table and call the procedure to retrieve the result:
create table T (i integer);
insert into T values (123);
The following would produce a result set with one row/column with the value 123:
CALL p1('T')
Please note that with this type of functionality, you need to be very careful not to allow any user-provided input to be given directly to a procedure that uses EXECUTE IMMEDIATE to avoid the possibility of SQL injection attacks.
Can i write a insert query inside Function in SQL server 2008. If i tried, im a getting an error of Invalid use of side effecting operator 'INSERT' within the function. Please help me out. But i want it to be a function, not a stored procedure
Create function EFT_DL_FUNC_AUDTI_BATCH_START (#i_db_name varchar(20))
returns int as
begin
insert into table_name(db_name) values (#i_db_name)
return 0
end
Quote from here:
User Defined Functions cannot be used
to modify base table information. The
DML statements INSERT, UPDATE, and
DELETE cannot be used on base tables.
So you can't do an INSERT in a function.
You might want to explain WHY you don't want to use a procedure.
I'd like to use a stored procedure to define the IN clause of a select statement.
This is (a simplified version of) what I'm trying to do:
SELECT *
FROM myTable
WHERE columnName IN (CALL myStoredProc)
myStoredProc performs some complicated logic in the database and returns a list of possible matching values for columnName. The statement above does not work obviously. The select statement may be performed in another stored procedure if that makes a difference.
Is this at all possible in mySQL?
What return type does your current stored procedure have? You are speaking of "a list", so TEXT?
Maybe there's an easier way, but one thing you can do (inside another stored procedure) is to build another query.
To do that, we need to work around two limitations of MySQL: a) To execute dynamic SQL inside a stored procedure, it needs to be a prepared statement. b) Prepared statements can only be created out of user variables. So the complete SQL is:
SET #the_list = myStoredProc();
SET #the_query = CONCAT('SELECT * FROM myTable WHERE columnName IN (' , #the_list , ')');
PREPARE the_statement FROM #the_query;
EXECUTE the_statement;
If you're talking about returning a result set from a stored routine and then using it as table, that is not possible. You need to make a temporary table to work around this limitation.