How to access parameters inside a Netezza stored procedure? - shell

Question

This is my stored procedure:
nzsql -u user -pw pass -c "CREATE OR REPLACE PROCEDURE INSERT_LOGIC(varchar(50),varchar(20),varchar(40)) RETURNS BOOL LANGUAGE NZPLSQL AS BEGIN_PROC
DECLARE
t1 ALIAS FOR $1;
t2 ALIAS FOR $2;
t3 ALIAS FOR $3;
BEGIN
INSERT INTO ABC..XYZ
(select '$t1','$t2','$t3' from ABC..PQR limit 10);
END;
END_PROC;"
The ALIAS FOR is the only way I found on the internet to do this but I get the following error:
NOTICE: plpgsql: ERROR during compile of INSERT_LOGIC near line 3
ERROR: syntax error, unexpected ERROR, expecting VARIABLE or WORD at or near "t1Stuff"
How do I access the three "varchar variables" that I pass to the stored procedure inside the same?

Answer 1

Here is an example similar to your requirement and its working. I am using two tables 'tab1' and 'tab2' with following description:
$ nzsql -d test -c "\d tab1"
Table "TAB1"
Attribute | Type | Modifier | Default Value
-----------+---------------+----------+---------------
COL1 | INTEGER | |
COL2 | CHARACTER(10) | |
COL3 | INTEGER | |
Distributed on hash: "COL1"
$ nzsql -d test -c "\d tab2"
Table "TAB2"
Attribute | Type | Modifier | Default Value
-----------+---------------+----------+---------------
C1 | INTEGER | |
C2 | CHARACTER(10) | |
C3 | INTEGER | |
Distributed on hash: "C1"
Following is the stored procedure code that I used:
CREATE OR REPLACE PROCEDURE INSERT_LOGIC(varchar(50),varchar(20),varchar(40))
RETURNS BOOL
LANGUAGE NZPLSQL
AS
BEGIN_PROC
DECLARE
num_args int4;
sql char(100);
t1 ALIAS FOR $1;
t2 ALIAS FOR $2;
t3 ALIAS FOR $3;
BEGIN
num_args := PROC_ARGUMENT_TYPES.count;
RAISE NOTICE 'Number of arguments: %', num_args;
sql := 'INSERT INTO tab2 SELECT ' || t1 || ',' || t2 || ',' || t3 || ' FROM tab1 LIMIT 10 ';
RAISE NOTICE 'SQL Statement: %', sql;
EXECUTE IMMEDIATE sql;
END;
END_PROC;
Hope this will help!

Answer 2

You're attempting to reference variables by putting a $ in front of the name, which is not valid.
Look at the example in the docs.
DECLARE
logtxt ALIAS FOR $1;
curtime timestamp;
BEGIN
curtime := 'now()';
INSERT INTO logtable VALUES (logtxt, curtime);
RETURN curtime;
END
You should try
INSERT INTO ABC..XYZ
(select t1, t2, t3 from ABC..PQR limit 10);
Though it's possible that the column values won't resolve when used this way. If not, build a dynamic statement and execute it instead.
declare sql varchar;
sql := 'insert into abc..xyz select ' || t1 || ',' || t2 || ',' || t3 || ' from abc..pqr limit 10;'
execute immediate sql;
If you're passing values, not column names, as parameters:
declare sql varchar;
sql := 'insert into abc..xyz select ''' || t1 || ''',''' || t2 || ''',''' || t3 || ''' from abc..pqr limit 10;'
execute immediate sql;