oracle 导出查询结果至CSV

使用oracle存储过程实现查询结果导出至csv文件中。调用过程时，需要在oracle服务器上定义目录（已经存在的目录）。

create or replace PROCEDURE  PX_SYS_IMP_CSV(V_SQL IN VARCHAR2,V_DIR IN VARCHAR2,V_FILENAME IN VARCHAR2)

IS

  V_FILE UTL_FILE.FILE_TYPE;

  V_CURSOR INTEGER DEFAULT DBMS_SQL.OPEN_CURSOR;

  V_COL_VALUE VARCHAR2(4000);

  V_COL_CNT NUMBER := 0;

  V_SEPARATOR CHAR(1);

  V_TAB_DESC DBMS_SQL.DESC_TAB;

 

  V_STATUS INTEGER;

  V_MAX_LINESIZE NUMBER := 32000;

BEGIN

  --OPEN FILE

  V_FILE := UTL_FILE.FOPEN(V_DIR, V_FILENAME, 'W', V_MAX_LINESIZE);

  EXECUTE IMMEDIATE 'ALTER SESSION SET NLS_DATE_FORMAT=''YYYY-MM-DDHH24:MI:SS''';

 

  --OPEN CURSOR

  DBMS_SQL.PARSE( V_CURSOR, V_SQL, DBMS_SQL.NATIVE );

  DBMS_SQL.DESCRIBE_COLUMNS( V_CURSOR, V_COL_CNT, V_TAB_DESC );

 

  --DUMP TABLE COLUMN NAME

  FOR I IN 1 .. V_COL_CNT LOOP

    UTL_FILE.PUT( V_FILE, V_SEPARATOR || '"' || V_TAB_DESC(I).COL_NAME ||'"' );

    DBMS_SQL.DEFINE_COLUMN( V_CURSOR, I, V_COL_VALUE, 4000 );

    V_SEPARATOR := ',';

  END LOOP;

  UTL_FILE.NEW_LINE( V_FILE );

 

  --EXECUTE THE QUERY STATEMENT

  V_STATUS := DBMS_SQL.EXECUTE(V_CURSOR);

 

  --DUMP TABLE COLUMN VALUE

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

    V_SEPARATOR := '';

    FOR I IN 1 .. V_COL_CNT LOOP

      DBMS_SQL.COLUMN_VALUE( V_CURSOR, I, V_COL_VALUE );

      UTL_FILE.PUT( V_FILE, V_SEPARATOR || '"' ||

      TRIM(BOTH ' ' FROM REPLACE(V_COL_VALUE,'"','""')) ||'"');

      V_SEPARATOR := ',';

    END LOOP;

    UTL_FILE.NEW_LINE( V_FILE );

  END LOOP;

 

  --CLOSE CURSOR

  DBMS_SQL.CLOSE_CURSOR(V_CURSOR);

 

  --CLOSE FILE

  UTL_FILE.FCLOSE( V_FILE );

END PX_SYS_IMP_CSV ;