Execute immediate a sql block of istructions

Question

Hello,
i need to to do something like this:
execute immediate par;
where par is a big file stored in a table that is simply a pl/sql script like this
comment on table SOMETABLE.COLUMN is 'this' ;
comment on table SOMETABLE.COLUMN2 is 'this' ;
and so on for 45 columns. when i try it say that ; is not a valid character. It works only if i put only a row in the table.
How i can put more istructions in a string to be "execute immediate"
Thanks
Edited by: user12195888 on 10-nov-2009 7.59

Answer 1

In the example already provided be aware that if you have commands that aren't supported in PL/SQL like COMMENT this approach may not work. Here is an example that breaks the string up on the semi-colon terminator:
SQL> DROP TABLE A;
Table dropped.
SQL> DROP TABLE B;
Table dropped.
SQL> DROP TABLE C;
Table dropped.
SQL> DROP TABLE INSTRUCTION_TEST;
Table dropped.
SQL>
SQL> CREATE TABLE A (ID NUMBER);
Table created.
SQL> CREATE TABLE B (ID NUMBER);
Table created.
SQL> CREATE TABLE C (ID NUMBER);
Table created.
SQL> CREATE TABLE INSTRUCTION_TEST
  2  (
  3          INSTRUC VARCHAR2(4000)
  4  );
Table created.
SQL>
SQL> INSERT INTO INSTRUCTION_TEST
  2  VALUES
  3  (
  4          'COMMENT ON TABLE A IS ''Table A''; COMMENT ON TABLE B IS ''Table B''; COMMENT ON TABLE C IS ''Table C'';'
  5  );
1 row created.
SQL>
SQL> DECLARE
  2  BEGIN
  3          FOR r IN
  4          (
  5                  WITH    instructions AS
  6                  (
  7                          SELECT  ';' || INSTRUC AS INST
  8                          FROM    INSTRUCTION_TEST
  9                  )
10                  SELECT  SUBSTR
11                          (
12                                  INST
13                          ,       INSTR(INST,';',1,LEVEL) + 1
14                          ,       INSTR(INST,';',1,LEVEL+1) - INSTR(INST,';',1,LEVEL) - 1
15                          )       AS INDIVIDUAL_STATEMENT
16                  FROM    instructions
17                  CONNECT BY LEVEL <= LENGTH(REGEXP_REPLACE(INST,'[^;]','')) - 1
18          )
19          LOOP
20                  --DBMS_OUTPUT.PUT_LINE(r.INDIVIDUAL_STATEMENT);
21                  EXECUTE IMMEDIATE r.INDIVIDUAL_STATEMENT;
22          END LOOP;
23  END;
24  /
PL/SQL procedure successfully completed.
SQL> SELECT * FROM ALL_TAB_COMMENTS WHERE TABLE_NAME IN ('A','B','C');
OWNER                          TABLE_NAME                     TABLE_TYPE  COMMENTS
TEST_USER                      C                              TABLE       Table C
TEST_USER                      B                              TABLE       Table B
TEST_USER                      A                              TABLE       Table AHTH!