How to write to files using utl_file in oracle - plsql

Question

How to use put function.my procedure is not compiling with put. but putline is working fine. i want to print in the same line

Answer 1

Here's an example of code which uses the UTL_FILE.PUT and UTL_FILE.PUT_LINE calls:
declare
fHandle UTL_FILE.FILE_TYPE;
begin
fHandle := UTL_FILE.FOPEN('my_directory', 'test_file', 'w');
UTL_FILE.PUT(fHandle, 'This is the first line');
UTL_FILE.PUT(fHandle, 'This is the second line');
UTL_FILE.PUT_LINE(fHandle, 'This is the third line');
UTL_FILE.FCLOSE(fHandle);
EXCEPTION
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE('Exception: SQLCODE=' || SQLCODE || ' SQLERRM=' || SQLERRM);
RAISE;
end;
The output from this looks like:
This is the first lineThis is the second lineThis is the third line
Share and enjoy.

Answer 2

Here is a robust function for using UTL_File.putline that includes the necessary error handling. It also handles headers, footers and a few other exceptional cases.
PROCEDURE usp_OUTPUT_ToFileAscii(p_Path IN VARCHAR2, p_FileName IN VARCHAR2, p_Input IN refCursor, p_Header in VARCHAR2, p_Footer IN VARCHAR2, p_WriteMode VARCHAR2) IS
vLine VARCHAR2(30000);
vFile UTL_FILE.file_type;
vExists boolean;
vLength number;
vBlockSize number;
BEGIN
UTL_FILE.fgetattr(p_path, p_FileName, vExists, vLength, vBlockSize);
FETCH p_Input INTO vLine;
IF p_input%ROWCOUNT > 0
THEN
IF vExists THEN
vFile := UTL_FILE.FOPEN_NCHAR(p_Path, p_FileName, p_WriteMode);
ELSE
--even if the append flag is passed if the file doesn't exist open it with W.
vFile := UTL_FILE.FOPEN(p_Path, p_FileName, 'W');
END IF;
--GET HANDLE TO FILE
IF p_Header IS NOT NULL THEN
UTL_FILE.PUT_LINE(vFile, p_Header);
END IF;
UTL_FILE.PUT_LINE(vFile, vLine);
DBMS_OUTPUT.PUT_LINE('Record count > 0');
--LOOP THROUGH CURSOR VAR
LOOP
FETCH p_Input INTO vLine;
EXIT WHEN p_Input%NOTFOUND;
UTL_FILE.PUT_LINE(vFile, vLine);
END LOOP;
IF p_Footer IS NOT NULL THEN
UTL_FILE.PUT_LINE(vFile, p_Footer);
END IF;
CLOSE p_Input;
UTL_FILE.FCLOSE(vFile);
ELSE
DBMS_OUTPUT.PUT_LINE('Record count = 0');
END IF;
EXCEPTION
WHEN UTL_FILE.INVALID_PATH THEN
DBMS_OUTPUT.PUT_LINE ('invalid_path');
DBMS_OUTPUT.PUT_LINE(SQLERRM);
RAISE;
WHEN UTL_FILE.INVALID_MODE THEN
DBMS_OUTPUT.PUT_LINE ('invalid_mode');
DBMS_OUTPUT.PUT_LINE(SQLERRM);
RAISE;
WHEN UTL_FILE.INVALID_FILEHANDLE THEN
DBMS_OUTPUT.PUT_LINE ('invalid_filehandle');
DBMS_OUTPUT.PUT_LINE(SQLERRM);
RAISE;
WHEN UTL_FILE.INVALID_OPERATION THEN
DBMS_OUTPUT.PUT_LINE ('invalid_operation');
DBMS_OUTPUT.PUT_LINE(SQLERRM);
RAISE;
WHEN UTL_FILE.READ_ERROR THEN
DBMS_OUTPUT.PUT_LINE ('read_error');
DBMS_OUTPUT.PUT_LINE(SQLERRM);
RAISE;
WHEN UTL_FILE.WRITE_ERROR THEN
DBMS_OUTPUT.PUT_LINE ('write_error');
DBMS_OUTPUT.PUT_LINE(SQLERRM);
RAISE;
WHEN UTL_FILE.INTERNAL_ERROR THEN
DBMS_OUTPUT.PUT_LINE ('internal_error');
DBMS_OUTPUT.PUT_LINE(SQLERRM);
RAISE;
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE ('other write error');
DBMS_OUTPUT.PUT_LINE(SQLERRM);
RAISE;
END;

Answer 3

You can check the below example of how to log/write using utl_file in PL/SQL.
DECLARE
fhandle utl_file.file_type;
BEGIN
fhandle := utl_file.fopen(
'UTL_DIR_STACKOVERFLOW'-- File location
, 'Check_Logging.txt' -- File name
, 'a' -- Open mode: a = append, w = write
);
utl_file.put(fhandle, 'Stackoverflow' );
utl_file.fclose(fhandle);
END;
Problems you can face-
Invalid directory object
Then you can create your own directory object and use the below query.
create or replace directory UTL_DIR_STACKOVERFLOW as '/tmp/';

Answer 4

CREATE OR REPLACE PROCEDURE SP_EXPORT_TO_CSV(P_OWNER VARCHAR2,
P_OBJECT_NAME VARCHAR2,
P_FILE_NAME VARCHAR2 --,
-- P_DELIMITED CHAR
) AS
-- declaration
TYPE C_DATA_CURSOR IS REF CURSOR;
C_DATA C_DATA_CURSOR;
v_file UTL_FILE.FILE_TYPE;
V_COLUMNS VARCHAR2(32767);
X VARCHAR2(32767);
V_FILE_NAME VARCHAR2(2000);
V_OWNER VARCHAR2(100);
V_OBJECT_NAME VARCHAR2(1000);
V_SQL VARCHAR2(32767);
V_DELIMITED VARCHAR2(10);
BEGIN
-- set value
V_FILE_NAME := P_FILE_NAME;
V_OBJECT_NAME := P_OBJECT_NAME;
V_OWNER := P_OWNER;
--V_DELIMITED:=P_DELIMITED;
SELECT REPLACE(LISTAGG(COLUMN_NAME, '|') WITHIN
GROUP(ORDER BY COLUMN_ID),
'|',
' || ' || '''|''' || ' || ')
INTO V_COLUMNS
FROM ALL_TAB_COLUMNS W
WHERE W.TABLE_NAME = V_OBJECT_NAME
AND W.OWNER = V_OWNER
ORDER BY COLUMN_ID;
-- SET OUTPUT PARAMETER --'EXPORTED_TO_TEXT_LOCATION'
v_file := UTL_FILE.FOPEN(location => 'MYLOCATION',
filename => V_FILE_NAME,
open_mode => 'w',
max_linesize => 32767);
UTL_FILE.PUT_LINE(v_file, REPLACE(V_COLUMNS, ' || ''|'' || ', '|'));
X := 'SELECT ' || V_COLUMNS || ' AS RECORD FROM ' || V_OWNER || '.' ||
V_OBJECT_NAME;
OPEN C_DATA FOR X;
LOOP
FETCH C_DATA
INTO V_SQL;
EXIT WHEN C_DATA%NOTFOUND;
UTL_FILE.PUT_LINE(v_file, V_SQL);
END LOOP;
CLOSE C_DATA;
UTL_FILE.FCLOSE(v_file);
END;