I'm trying to create a dunamic procedure that, given a specific dbname and tablename, creates a set of select statements using all column names available for that table.
I'm using the following code:
REPLACE PROCEDURE sum_col
(
IN TABLENAME VARCHAR(50), DBNAME VARCHAR(286)
)
BEGIN
DECLARE SqlTxt VARCHAR(3000);
FOR cur AS
SELECT
TRIM(a.DatabaseName) AS DBNAME,
TRIM(a.TABLENAME) AS TABLENAME,
TRIM(b.ColumnName) AS ColumnName
FROM dbc.Tables a
INNER JOIN dbc.COLUMNS AS b
ON a.DatabaseName=b.DatabaseName AND a.TABLENAME = b.TABLENAME
WHERE a.DatabaseName = :DBNAME
AND a.TABLENAME = :TABLENAME
AND TableKind = 'T'
DO
SET SqlTxt = 'SELECT ' || '''' || TRIM(cur.ColumnName) || '''' || ', CASE
WHEN SUM(CNT) IS NULL THEN 0
ELSE SUM(CNT)
END AS CntNull
FROM (
SELECT 0 AS cnt
FROM ' || TRIM(cur.DBNAME) || '.' || TRIM(cur.TABLENAME) ||' )a ;';
CALL dbc.sysexecsql(:SqlTxt);
END FOR;
END;
But when I call the statement I get this error: CALL Failed. [5568] SUM_COL:SQL statement is not supported within a stored procedure.
How can I fix this?
Explanation: This error occurs when in one of the following situations: a. An unsupported SQL statement is specified in a stored procedure using the dynamic SQL feature of stored procedures. For instance, DATABASE statement, SET SQL statements, multi statement requests, CREATE USER/DATABASE statement without FROM clause, SELECT - INTO SQL or CALL SQL. This is a run-time error.
Looks like you have other syntax errors. Declare your cursor, open your cursor, etc.. I think you can solve your goal in an easier way, what exactly are you trying to accomplish?