illustrate the importance of setting out_value_size. : dbms_sql « System Packages « Oracle PL / SQL






  1. Oracle PL / SQL
  2. System Packages
  3. dbms_sql

illustrate the importance of setting out_value_size.

  
SQL>
SQL> CREATE TABLE lecturer (
  2    id               NUMBER(5) PRIMARY KEY,
  3    first_name       VARCHAR2(20),
  4    last_name        VARCHAR2(20),
  5    major            VARCHAR2(30),
  6    current_credits  NUMBER(3)
  7    );

Table created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10001, 'Scott', 'Lawson','Computer Science', 11);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major, current_credits)
  2                VALUES (10002, 'Mar', 'Wells','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10003, 'Jone', 'Bliss','Computer Science', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10004, 'Man', 'Kyte','Economics', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10005, 'Pat', 'Poll','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10006, 'Tim', 'Viper','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10007, 'Barbara', 'Blues','Economics', 7);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10008, 'David', 'Large','Music', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10009, 'Chris', 'Elegant','Nutrition', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10010, 'Rose', 'Bond','Music', 7);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10011, 'Rita', 'Johnson','Nutrition', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10012, 'Sharon', 'Clear','Computer Science', 3);

1 row created.

SQL> set serveroutput on
SQL>
SQL> CREATE OR REPLACE PROCEDURE DynamicPLSQL (
  2    p_ID IN lecturer.ID%TYPE) IS
  3
  4    v_CursorID  INTEGER;
  5    v_BlockStr  VARCHAR2(500);
  6    myFirstName lecturer.first_name%TYPE;
  7    v_LastName  lecturer.last_name%TYPE;
  8    v_Dummy     INTEGER;
  9
 10  BEGIN
 11    v_CursorID := DBMS_SQL.OPEN_CURSOR;
 12
 13    v_BlockStr :=
 14      'BEGIN
 15         SELECT first_name, last_name
 16           INTO :first_name, :last_name
 17           FROM lecturer
 18           WHERE ID = :ID;
 19       END;';
 20
 21    DBMS_SQL.PARSE(v_CursorID, v_BlockStr, DBMS_SQL.NATIVE);
 22
 23    DBMS_SQL.BIND_VARIABLE(v_CursorID, ':first_name', myFirstName);
 24    DBMS_SQL.BIND_VARIABLE(v_CursorID, ':last_name', v_LastName);
 25    DBMS_SQL.BIND_VARIABLE(v_CursorID, ':ID', p_ID);
 26
 27    v_Dummy := DBMS_SQL.EXECUTE(v_CursorID);
 28
 29    DBMS_SQL.VARIABLE_VALUE(v_CursorID, ':first_name', myFirstName);
 30    DBMS_SQL.VARIABLE_VALUE(v_CursorID, ':last_name', v_LastName);
 31
 32    DBMS_OUTPUT.PUT('ID: ' || p_ID || ' ');
 33    DBMS_OUTPUT.PUT_LINE(myFirstName || ' ' || v_LastName);
 34
 35    DBMS_SQL.CLOSE_CURSOR(v_CursorID);
 36  EXCEPTION
 37    WHEN OTHERS THEN
 38      DBMS_SQL.CLOSE_CURSOR(v_CursorID);
 39      RAISE;
 40  END DynamicPLSQL;
 41  /

Procedure created.

SQL>
SQL> REM This will raise ORA-6502.
SQL> exec DynamicPLSQL(10010)
BEGIN DynamicPLSQL(10010); END;

*
ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "JAVA2S.DYNAMICPLSQL", line 39
ORA-06512: at line 1


SQL>
SQL> drop table lecturer;

Table dropped.








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5.Use dbms_sql.bind_array to bind array to a cursor
6.Use dbms_sql.parse to bind a select statement to a cursor
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9.Use DBMS_SQL with the RETURNING clause.
10.DBMS_SQL.NATIVE;
11.DBMS_SQL.PARSE and DBMS_SQL.EXECUTE
12.Dynamic sql statement with variable binding
13.Dynamic select statement and row fetch
14.Execute PL/SQL block
15.DBMS_SQL package: dynamic SQL
16.Pass where clause to a stored procedure
17.Executing Queries and use DBMS_SQL.COLUMN_VALUE to map value
18.Executing PL/SQL Blocks and use BIND_VARIABLE to bind variable
19.drop the supplied table using dynamic SQL.
20.DBMS_SQL.BIND_VARIABLE_CHAR
21.Calling a function which uses dynamic SQL from within an SQL statement.
22.Illustrates the interaction of roles and dynamic SQL.
23.illustrates a DDL statement which is built dynamically from the procedure parameters.
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