Reading clob line by line with pl\sql

Question

In my project i use oracle as primary database and i\'ve faced a problem with parsing clob. So suppose we have a clob with value

   aaaaaa
   cccccc
   bbbbb         


        

Answer 1

Emmanuel's Answer

This is an elegant solution that works just fine with clobs exceeding 32767 chars or lines exceeding 4K characters.

ANSI Standard Query:

DECLARE
  v_tmp clob :='aaaa'||chr(10)||
               'bbb'||chr(10)||
               'ccccc';
BEGIN
  FOR rec IN (WITH clob_table(c) as (SELECT v_tmp c FROM DUAL),
                   recurse(text,line) as (SELECT regexp_substr(c, '.+', 1, 1) text,1 line
                                            FROM clob_table
                                           UNION ALL
                                          SELECT regexp_substr(c, '.+', 1, line+1),line+1
                                            FROM recurse r,clob_table
                                           WHERE line

Oracle Specific Query (original post):

DECLARE
  v_tmp clob :='aaaa'||chr(10)||
               'bbb'||chr(10)||
               'ccccc';
BEGIN
  FOR rec IN (WITH clob_table(c) as (SELECT v_tmp c FROM DUAL)
            SELECT regexp_substr(c, '.+', 1, level) text,level line
             FROM clob_table
          CONNECT BY LEVEL <= regexp_count(c, '.+')) LOOP
      dbms_output.put_line(rec.text);
  END LOOP;
END;