dump_table_to_csv procedure

 exec DUMP_TABLE_TO_CSV('ULS.MARKET','DATA_PUMP_DIR','market.csv');


CREATE OR REPLACE procedure SYS.DUMP_TABLE_TO_CSV( p_tname in varchar2,
                                                   p_dir   in varchar2,
                                                  p_filename in varchar2 )
   is
        l_output        utl_file.file_type;
        l_theCursor     integer default dbms_sql.open_cursor;
        l_columnValue   varchar2(4000);
        l_status        integer;
        l_query         varchar2(1000)
                       default 'select * from ' || p_tname;
       l_colCnt        number := 0;
       l_separator     varchar2(1);
       l_descTbl       dbms_sql.desc_tab;
   begin
       l_output := utl_file.fopen( p_dir, p_filename, 'w' );
       execute immediate 'alter session set nls_date_format=''dd-mon-yyyy hh24:mi:ss''
';
  
       dbms_sql.parse(  l_theCursor,  l_query, dbms_sql.native );
       dbms_sql.describe_columns( l_theCursor, l_colCnt, l_descTbl );
 
       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 );
  
       l_status := dbms_sql.execute(l_theCursor);
  
       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 || l_columnValue );
               l_separator := ',';
           end loop;
           utl_file.new_line( l_output );
       end loop;
       dbms_sql.close_cursor(l_theCursor);
       utl_file.fclose( l_output );
  
       execute immediate 'alter session set nls_date_format=''dd-MON-yy'' ';
   exception
       when others then
           execute immediate 'alter session set nls_date_format=''dd-MON-yy'' ';
           raise;
   end;
/