dbms_lob.instr(
lob_loc in blob,
pattern in raw,
offset in integer := 1;
nth in integer := 1)
return integer;
dbms_lob.instr(
lob_loc in clob character set any_cs,
pattern in varchar2 character set lob_loc%charset,
offset in integer:=1,
nth in integer := 1)
return integer;
dbms_lob.substr(
lob_loc in blob,
amount in integer := 32767,
offset in integer := 1)
return raw;
dbms_lob.substr(
lob_loc in clob character set any_cs,
amount in integer := 32767,
offset in integer := 1)
return varchar2 character set lob_loc%charset;
declare
source_lob clob;
pattern varchar2(6) := 'Oracle';
start_location integer := 1;
nth_occurrence integer := 1;
position integer;
buffer varchar2(100);
begin
select clob_locator into source_lob from mylobs where lob_index = 4;
position := dbms_lob.instr(source_lob, pattern, start_location, nth_occurrence);
dbms_output.put_line('The first occurrence starts at position:' || position);
nth_occurrence := 2;
select clob_locator into source_lob from mylobs where lob_index = 4;
position := dbms_lob.instr(source_lob, pattern, start_location, nth_occurrence);
dbms_output.put_line('The first occurrence starts at position:' || position);
select clob_locator into source_lob from mylobs where lob_index = 5;
buffer := dbms_lob.substr(source_lob, 9, start_location);
dbms_output.put_line('The substring extracted is: ' || buffer);
end;
/
The first occurrence starts at position:8
The first occurrence starts at position:24
The substring extracted is: Oracle 9i