oracle 通过存储过程把表生成csv

CREATE OR REPLACE PROCEDURE SP_SQL_TO_CSV(P_QUERY IN VARCHAR2, -- PLSQL文
                               P_DIR IN VARCHAR2, -- 导出的文件放置目录
                               P_FILENAME IN VARCHAR2 -- CSV名
                               )

 IS

  L_OUTPUT UTL_FILE.FILE_TYPE;
  L_THECURSOR INTEGER DEFAULT DBMS_SQL.OPEN_CURSOR;
  L_COLUMNVALUE VARCHAR2(4000);
  L_STATUS INTEGER;
  L_COLCNT NUMBER := 0;
  L_SEPARATOR VARCHAR2(1);
  L_DESCTBL DBMS_SQL.DESC_TAB;
  P_MAX_LINESIZE NUMBER := 32000;

BEGIN

  --OPEN FILE
  L_OUTPUT := UTL_FILE.FOPEN(P_DIR, P_FILENAME, 'W', P_MAX_LINESIZE);

  --DEFINE DATE FORMAT
  EXECUTE IMMEDIATE 'ALTER SESSION SET NLS_DATE_FORMAT=''YYYY-MM-DD HH24:MI:SS''';

  --OPEN CURSOR
  DBMS_SQL.PARSE(L_THECURSOR, P_QUERY, DBMS_SQL.NATIVE);
  DBMS_SQL.DESCRIBE_COLUMNS(L_THECURSOR, L_COLCNT, L_DESCTBL);

  --DUMP TABLE COLUMN NAME
  FOR I IN 1 .. L_COLCNT LOOP

    UTL_FILE.PUT(L_OUTPUT, L_SEPARATOR || '"' || L_DESCTBL(I).COL_NAME || '"');

    DBMS_SQL.DEFINE_COLUMN(L_THECURSOR, I, L_COLUMNVALUE, 4000);

    L_SEPARATOR := ',';

  END LOOP;

  UTL_FILE.NEW_LINE(L_OUTPUT);

  --EXECUTE THE QUERY STATEMENT

  L_STATUS := DBMS_SQL.EXECUTE(L_THECURSOR);

  --DUMP TABLE COLUMN VALUE

  WHILE (DBMS_SQL.FETCH_ROWS(L_THECURSOR) > 0) LOOP

    L_SEPARATOR := '';

    FOR I IN 1 .. L_COLCNT LOOP
      DBMS_SQL.COLUMN_VALUE(L_THECURSOR, I, L_COLUMNVALUE);
      UTL_FILE.PUT(L_OUTPUT, L_SEPARATOR || '"' ||TRIM(BOTH ' ' FROM REPLACE(L_COLUMNVALUE, '"', '""')) || '"');
      L_SEPARATOR := ',';
    END LOOP;

    UTL_FILE.NEW_LINE(L_OUTPUT);

  END LOOP;

  --CLOSE CURSOR
  DBMS_SQL.CLOSE_CURSOR(L_THECURSOR);

  --CLOSE FILE
  UTL_FILE.FCLOSE(L_OUTPUT);

  /*
  --执行语句  需要dba或者sys权限
  -- 创建存放文件的目录
  CREATE OR REPLACE DIRECTORY MYDIR AS 'F:\backup\dir_wms\';
 -- GRANT all on directory MYDIR to WMS_DG;

  -- 执行块
   begin
     SP_sql_to_csv('select * from T_ZXZC_TMP ','MYDIR','T_ZXZC_TMP.CSV');
   end;

   */
EXCEPTION
  WHEN OTHERS THEN
    RAISE;
END;



==============================================================================================================

 --执行语句  需要dba或者sys权限
  -- 创建存放文件的目录
  CREATE OR REPLACE DIRECTORY MYDIR AS 'D:\aaa\';
 -- GRANT all on directory MYDIR to WMS_DG;
 
=================================================================================================================
SELECT 'call SP_SQL_TO_CSV(''select * from ' ||T.TABLE_NAME ||
''',''MYDIR''' || ',''' || T.TABLE_NAME ||
 '.csv'');'
 FROM user_TABLES T where t.TABLE_NAME like 'V_%'
 =====================================================================