Import CSV File in Oracle Table Using Stored Procedure

CSV file is a comma delimited file in which fields are separated by the comma. In this article, I am giving an example to import CSV file into oracle table using stored procedure. The stored procedure in Oracle is a PL/SQL program unit which can be a stand-alone or in database package.

You must have a directory object in Oracle database referring to server path in which the file is stored. In the below example I am using directory object name as CSV_DIR and procedure name is read_csv. Also created a function GetString in the procedure read_csv to get the delimited string one by one.

Loading CSV File into Oracle Table using PL/SQL Procedure

CREATE OR REPLACE PROCEDURE read_csv
IS
l_file_type UTL_FILE.file_type;

l_string VARCHAR2 (32765);

TYPE Fieldvalue IS TABLE OF VARCHAR2 (4000)
INDEX BY BINARY_INTEGER;

t_field Fieldvalue;

FUNCTION GetString (Source_string IN VARCHAR2,
Field_position IN NUMBER,
UnTerminated IN BOOLEAN DEFAULT FALSE,
Delimiter IN VARCHAR2 DEFAULT ',')
RETURN VARCHAR2
IS
iPtrEnd PLS_INTEGER := 0;
iPtrStart PLS_INTEGER := 0;
vcSourceStrCopy VARCHAR2 (4000) := Source_string;
BEGIN
IF UnTerminated
THEN
vcSourceStrCopy := vcSourceStrCopy || Delimiter;
END IF;

IF Field_Position > 1
THEN
iPtrStart :=
INSTR (vcSourceStrCopy,
Delimiter,
1,
Field_Position - 1)
+ LENGTH (Delimiter);
ELSE
iPtrStart := 1;
END IF;

iPtrEnd :=
INSTR (vcSourceStrCopy,
Delimiter,
1,
Field_Position);
RETURN SUBSTR (vcSourceStrCopy, iPtrStart, (iPtrEnd - iPtrStart));
END GetString;
BEGIN
l_file_type := UTL_FILE.Fopen ('CSV_DIR', 'abc.csv', 'r');

LOOP
UTL_FILE.Get_Line (l_file_type, l_string);

l_string := l_string || ',';

FOR n IN 1 .. REGEXP_COUNT (l_string, ',')
LOOP
t_field (n) :=
Getstring (l_string,
n,
FALSE,
',');

END LOOP;

INSERT INTO EMP (EMPNO,
ENAME,
JOB,
MGR,
HIREDATE,
SAL,
COMM,
DEPTNO)
VALUES (t_field (1),
t_field (2),
t_field (3),
t_field (4),
TO_DATE (t_field (5), 'dd/mm/yyyy'),
t_field (6),
t_field (7),
t_field (8));
END LOOP;

UTL_FILE.Fclose (l_file_type);

COMMIT;
EXCEPTION
WHEN OTHERS
THEN
IF UTL_FILE.is_open (l_file_type)
THEN
UTL_FILE.Fclose (l_file_type);
END IF;
END;

Please note that you must study your CSV file to map target table correctly. Also handle the date format for date fields, as per your CSV date data format.