Question

Can you help me rectify this block of code plz?

`CREATE OR REPLACE FUNCTION TABLE_EXISTS(name VARCHAR(50))
RETURNS BOOLEAN
AS
BEGIN
    DECLARE counttable INTEGER;

    SELECT COUNT(1) INTO counttable FROM USER_TABLES WHERE TABLE_NAME=name;

    if counttable=0 then
    return false
    else
    return true
    end if;
END;
/
IF (TABLE_EXISTS("LEADS_DELETED")) then
DROP TABLE LEADS_DELETED;
end if;
/
CREATE GLOBAL TEMPORARY TABLE LEADS_DELETED
(
    ID NUMBER(19),
    PRIMARY KEY (ID)
) ON COMMIT DELETE ROWS`

Answer 1

You can use a construct like this when you want to create or recreate a table (try to drop and catch the ORA-00942 exception that gets thrown when the object doesn’t exist):

DECLARE
   table_does_not_exist exception;
   pragma exception_init(table_does_not_exist, -942);
BEGIN
   EXECUTE IMMEDIATE 'DROP TABLE LEADS_DELETED';
EXCEPTION
   WHEN table_does_not_exist THEN
      NULL;
END;
/

CREATE TABLE ...