I'm having trouble refreshing an MQT inside of a stored procedure.
I'm receiving the following error when attempting to refresh the table :
ERROR [42601] [IBM][DB2/LINUXX8664] SQL0104N An unexpected token "REFRESH" was found following "ANGUAGE SQL BEGIN " . Expected tokens may include: "TRUNCATE" .
/**********
* CREATE A NEW DUMMY TABLE AND INSERT DUMMY DATA
**********/
CREATE TABLE DELETE_ME (
COLUMN_A DECIMAL(5)
);
INSERT INTO DELETE_ME (COLUMN_A) VALUES (1);
INSERT INTO DELETE_ME (COLUMN_A) VALUES (2);
INSERT INTO DELETE_ME (COLUMN_A) VALUES (3);
/**********
* CREATE A MATERIALIZED QUERY USING THE DUMMY TABLE
**********/
CREATE TABLE MQT_TEST AS (
SELECT COLUMN_A
FROM DELETE_ME
)
DATA INITIALLY DEFERRED
REFRESH DEFERRED
ENABLE QUERY OPTIMIZATION
NOT LOGGED INITIALLY;
COMMIT;
/**********
* CREATE A SIMPLE PROCEDURE TO REFRESH THE MATERIALIZED QUERY
**********/
CREATE OR REPLACE PROCEDURE TEST_PROC LANGUAGE SQL
BEGIN
REFRESH TABLE MQT_TEST;
END;
--!!!! FAILS WITH THE FOLLOWING ERROR CODE: - DB2 Database Error :
ERROR [42601] [IBM][DB2/LINUXX8664] SQL0104N An unexpected token "REFRESH" was found following "ANGUAGE SQL BEGIN ". Expected tokens may include: "TRUNCATE" .
You can't execute the REFRESH TABLE as a static statement in a stored procedure as it can only run as a dynamic statement.
Therefore, the proper method to do this is to use the EXECUTE IMMEDIATE statement:
CREATE OR REPLACE PROCEDURE TEST_PROC
LANGUAGE SQL
BEGIN
declare vSQL varchar(1024);
set vSQL = 'refresh table MQT_TEST';
execute immediate vSQL;
END#
Related
I have written a stored procedure for select operation in netezza db, but its throwing error while I try to execute that stored procedure.
Below is my stored procedure for select operation to fetch and display all records from a table.
#delimiter %%%;
CREATE OR REPLACE PROCEDURE return_result10() RETURNS REFTABLE(tbl)
LANGUAGE NZPLSQL AS
BEGIN_PROC
BEGIN
call * from tbl;
RETURN REFTABLE;
END;
END_PROC;%%%
#delimiter;%%%
I am getting below error as soon as I try to execute this using command ( execute PROCEDURE return_result10(); )
[Code: 1100, SQL State: HY000] ERROR: query "SELECT * from tbl" didn't return a single value
I want a stored procedure to fetch and display all records present in a table in netezza db.
I've seen in the help guides that you cannot use a call statement in a teradata dynamic sql statement without output parameter.
I assume this implies I can, If the proc has an output parameter.
has anyone done this?
Scenario -
I have a table that at some point I'll expand out in terms of fields for logic on when things should run, and this table is managed elsewhere -
CREATE TABLE DB.SP_Test
(
ProcName VARCHAR(250)
,ProcRun VARCHAR(1)
);
now I added chrTest as an output however, I am still getting an error on run (no compile error)
The error :-
SQL_State SQL_Exception
T7689 Invalid dynamic SQL statement.
REPLACE PROCEDURE DB.Test_Control (OUT chrTest VARCHAR(250) )
SQL SECURITY INVOKER
LMain:
BEGIN
DECLARE sqlProcRun VARCHAR(20000);
DECLARE CONTINUE HANDLER
FOR SqlException
BEGIN
-----------------------------------------------------------------------------
DECLARE strExceptionText VARCHAR(250);
GET DIAGNOSTICS EXCEPTION 1 strExceptionText = Message_Text;
INSERT INTO DB.PROC_ERROR VALUES
(
'Test_Control'
,:SqlState
,strExceptionText
,Current_Timestamp
)
;
END;
-----------------------------------------------------------------------------
SET sqlProcRun ='';
L0:
FOR procs_run_cursor AS select_list
CURSOR FOR
SELECT Trim(ProcName) AS ProcName
FROM DB.SP_Test
DO
/*creating a lost of call statements to run*/
SET sqlProcRun = sqlProcRun ||'CALL DB.'||procs_run_cursor.ProcName|| '();';
END FOR L0;
EXECUTE IMMEDIATE sqlProcRun;
END;
Enviroment:
DB2 Version 11.1,
OS - Linux
How to get the result table of stored procedure into a temp table?
The table and the result have the same table configuration (firstColumn int, secondColumn nvarchar(255))
I'm assuming your stored procedure returns an open cursor, so you want to consume that cursor, inserting its contents into a session table (declared global temporary table) on Db2-LUW.
In addition to fetch and insert statements, you need to understand the following statements:
associate result set locator ... with procedure ...
allocate ... cursor for result set ...
Here is a deliberately artificial example of a nested stored procedure, which shows fetching a result-set from a nested procedure into a session table. The purpose is to show how the syntax works, rather than to do anything useful with data (as the net effect can be equally met by a simple catalog query in this case). This example can be run at the Db2 command-line (for example at the bash shell, after you connected to a database with appropriate permissions):
update command options using s on ;
--#SET TERMINATOR #
create or replace procedure alltabs
dynamic result sets 1
language sql
specific alltabs
begin
declare v_cur cursor with return to caller for select tabschema,tabname,type from syscat.tables ;
open v_cur;
end#
declare global temporary table session.thetables(tabschema varchar(128), tabname varchar(128))
not logged with replace on commit preserve rows #
create or replace procedure populate_dgtt()
language sql
specific populate_dgtt
begin
declare v_rs result_set_locator varying;
declare v_tabschema varchar(128);
declare v_tabname varchar(128);
declare v_type char(1);
declare sqlstate char(5) default '00000';
call alltabs;
associate result set locator (v_rs) with procedure alltabs;
allocate v_rscur cursor for result set v_rs;
fetch from v_rscur into v_tabschema, v_tabname, v_type;
while ( sqlstate = '00000') do
if v_type='V' and v_tabschema='SYSSTAT'
then
insert into session.thetables(tabschema,tabname) values (v_tabschema, v_tabname);
end if;
fetch from v_rscur into v_tabschema, v_tabname, v_type;
end while;
return;
end#
call populate_dgtt()#
select rtrim(Tabschema)||'.'||rtrim(tabname) from session.thetables #
I have a db2 stored proc which contains a select query. I want to abort or fail this stored proc if the select query is returning any value. Please help.
SET CURRENT SCHEMA = abc;
SET CURRENT PATH = abc,pqr;
CREATE OR REPLACE PROCEDURE abc.VALID_xyz ( )
SPECIFIC SQL150421070712734
LANGUAGE SQL
NOT DETERMINISTIC
EXTERNAL ACTION
MODIFIES SQL DATA
CALLED ON NULL INPUT
INHERIT SPECIAL REGISTERS
OLD SAVEPOINT LEVEL
begin
DECLARE C1 CURSOR WITH RETURN
FOR select * from xy_table;
open C1;
RETURN;
END;
SET CURRENT SCHEMA = abc;
If xy_table has any rows , I need to fail this stored proc.
The SIGNALcommand can trigger a predefined or custom SQLSTATE that will abort the current SQL procedure (or atomic block of SQL statements) as if an actual error had occurred.
SET CURRENT SCHEMA = abc;
SET CURRENT PATH = abc,pqr;
--#SET TERMINATOR #
CREATE OR REPLACE PROCEDURE abc.valid_xyz()
SPECIFIC valid_xyz
NO EXTERNAL ACTION
LANGUAGE SQL
BEGIN
IF EXISTS ( SELECT 1 FROM xy_table FETCH FIRST ROW ONLY )
THEN
SIGNAL SQLSTATE '75002'
SET MESSAGE_TEXT =
'Table XY_TABLE contained data when it was expected to be empty.';
END IF;
END#
--#SET TERMINATOR ;
CALL valid_xyz();
SQL0438N Application raised error or warning with diagnostic text:
"Table XY_TABLE contained data when it was expected to be empty.". SQLSTATE=75002
I am trying to create a simple stored procedure in DB2 that performs the following actions:
Drop table "DELETE_ME"
Create table "DELETE_ME"
Insert into table "DELETE_ME"
Basically, if the table DELETE_ME already exists, the stored procedure executes fine. If it does not exist, then the Stored Procedure fails with the following error:
Lookup Error - DB2 Database Error: ERROR [42704] [IBM][DB2/LINUXX8664] SQL0204N "SARTS02T.DELETE_ME" is an undefined name.
I completely understand this. However, I was hoping to set the procedure up to ignore this error (and all errors) that way the procedure can work as a deployment script as well. On the first deployment, it will ignore the drop table line and jump right to building the table.
I found a CREATE PROCEDURE option called CONTINUE AFTER FAILURE however I am receiving an error. Please see my code and error below. Thanks for your help!!!
CODE:
CREATE OR REPLACE PROCEDURE TEST_PROC LANGUAGE SQL CONTINUE AFTER FAILURE
BEGIN
DROP TABLE DELETE_ME;
CREATE TABLE DELETE_ME (
COLUMN_A DECIMAL(5)
);
INSERT INTO DELETE_ME (COLUMN_A) VALUES (69);
COMMIT;
END;
ERROR:
Lookup Error - DB2 Database Error: ERROR [42601] [IBM][DB2/LINUXX8664] SQL0104N An unexpected token "CONTINUE AFTER FAILURE" was found following "ST_PROC LANGUAGE SQL". Expected tokens may include: "<space>".
The BEGIN ... END section is called a compound statement which allows various declarations and other statements, including other compound statements, to be included inside it.
You'll want to declare a condition handler. You could do it something like this.
CREATE OR REPLACE PROCEDURE TEST_PROC
LANGUAGE SQL
COMMIT ON RETURN YES
BEGIN
DECLARE CONTINUE HANDLER FOR SQLSTATE '42704' -- or SQLEXCEPTION
BEGIN
-- insert any code here when DROP fails
END;
DROP TABLE DELETE_ME;
CREATE TABLE DELETE_ME
( COLUMN_A DECIMAL(5)
);
INSERT INTO DELETE_ME (COLUMN_A)
VALUES (69);
END;