Read clob type data, DBMS_LOB.READ

 

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

Table created.

SQL>
SQL>
SQL> CREATE OR REPLACE PROCEDURE initClob(clob_par IN OUT CLOB,id_par IN INTEGER) IS
  2  BEGIN
  3    SELECT clob_column INTO clob_par FROM myTable WHERE id = id_par;
  4  END initClob;
  5  /

Procedure created.

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

Procedure created.

SQL>
SQL> drop table myTable;

Table dropped.

1.	clob data type
2.	Use clob type in PL/SQL
3.	Use dbms_lob.erase to remove value from clob type value
4.	Use dbms_lob.fileopen to open bfile
5.	Creating an Internal LOB Table
6.	Copying Internal LOBs
7.	Appending and Writing to LOBs
8.	DBMS_LOB package.
9.	Print out the length of the CLOBs previously INSERTed
10.	Compare clob data
11.	Compare two clobs
12.	Append data to clob
13.	Assign string value to clob type variable
14.	Clob type column
15.	Copy clob data
16.	In() function with clob data
17.	Initialize clob
18.	Use between ... and with clob data
19.	Use clob to store xml data
20.	clob type data as string
21.	erase clob data
22.	use like operator with clob type data

Read clob type data, DBMS_LOB.READ : Clob « Data Type « Oracle PL / SQL

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