erase clob data : Clob « Data Type « Oracle PL / SQL






  1. Oracle PL / SQL
  2. Data Type
  3. Clob

erase clob data

 

SQL> CREATE TABLE myTable (
  2    id          INTEGER PRIMARY KEY,
  3    clobData    CLOB NOT NULL
  4  );

Table created.
SQL>
SQL>
SQL> CREATE OR REPLACE PROCEDURE readClob(id_par IN INTEGER) IS
  2    clobVariable CLOB;
  3    charVariable VARCHAR2(50);
  4    offsetPos INTEGER := 1;
  5    amount_var INTEGER := 50;
  6  BEGIN
  7    initClob(clobVariable, id_par);
  8    DBMS_LOB.READ(clobVariable, amount_var, offsetPos, charVariable);
  9    DBMS_OUTPUT.PUT_LINE('charVariable = ' || charVariable);
 10    DBMS_OUTPUT.PUT_LINE('amount_var = ' || amount_var);
 11  END readClob;
 12  /

Procedure created.

SQL>
SQL>
SQL> CREATE OR REPLACE PROCEDURE erase_example IS
  2    clobVariable CLOB;
  3    offsetPos INTEGER := 2;
  4    amount_var INTEGER := 5;
  5  BEGIN
  6    SELECT clobData INTO clobVariable FROM myTable WHERE id = 1 FOR UPDATE;
  7
  8    readClob(1);
  9    DBMS_LOB.ERASE(clobVariable, amount_var, offsetPos);
 10    readClob(1);
 11
 12  END erase_example;
 13  /

Procedure created.

SQL>
SQL> drop table myTable;

Table dropped.








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