sql_load.cc 25.1 KB
Newer Older
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3 4 5 6
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
7

bk@work.mysql.com's avatar
bk@work.mysql.com committed
8 9 10 11
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
12

bk@work.mysql.com's avatar
bk@work.mysql.com committed
13 14 15 16 17 18 19 20 21 22
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


/* Copy data from a textfile to table */

#include "mysql_priv.h"
#include <my_dir.h>
#include <m_ctype.h>
23
#include "sql_repl.h"
bk@work.mysql.com's avatar
bk@work.mysql.com committed
24 25 26 27 28 29 30 31 32 33 34 35

class READ_INFO {
  File	file;
  byte	*buffer,			/* Buffer for read text */
	*end_of_buff;			/* Data in bufferts ends here */
  uint	buff_length,			/* Length of buffert */
	max_length;			/* Max length of row */
  char	*field_term_ptr,*line_term_ptr,*line_start_ptr,*line_start_end;
  uint	field_term_length,line_term_length,enclosed_length;
  int	field_term_char,line_term_char,enclosed_char,escape_char;
  int	*stack,*stack_pos;
  bool	found_end_of_line,start_of_line,eof;
36
  bool  need_end_io_cache;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
37 38 39 40 41 42 43
  IO_CACHE cache;
  NET *io_net;

public:
  bool error,line_cuted,found_null,enclosed;
  byte	*row_start,			/* Found row starts here */
	*row_end;			/* Found row ends here */
bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
44
  CHARSET_INFO *read_charset;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
45

bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
46
  READ_INFO(File file,uint tot_length,CHARSET_INFO *cs,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
47
	    String &field_term,String &line_start,String &line_term,
48
	    String &enclosed,int escape,bool get_it_from_net, bool is_fifo);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
49 50 51 52 53 54 55
  ~READ_INFO();
  int read_field();
  int read_fixed_length(void);
  int next_line(void);
  char unescape(char chr);
  int terminator(char *ptr,uint length);
  bool find_start_of_fields();
56 57 58 59
  /*
    We need to force cache close before destructor is invoked to log
    the last read block
  */
60 61 62 63 64 65
  void end_io_cache()
  {
    ::end_io_cache(&cache);
    need_end_io_cache = 0;
  }

66 67 68 69 70
  /*
    Either this method, or we need to make cache public
    Arg must be set from mysql_load() since constructor does not see
    either the table or THD value
  */
71
  void set_io_cache_arg(void* arg) { cache.arg = arg; }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
72 73 74 75 76 77 78 79 80
};

static int read_fixed_length(THD *thd,COPY_INFO &info,TABLE *table,
			     List<Item> &fields, READ_INFO &read_info);
static int read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
			  List<Item> &fields, READ_INFO &read_info,
			  String &enclosed);


81 82
#ifndef EMBEDDED_LIBRARY

bk@work.mysql.com's avatar
bk@work.mysql.com committed
83 84 85 86 87 88 89 90 91 92
int mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
	       List<Item> &fields, enum enum_duplicates handle_duplicates,
	       bool read_file_from_client,thr_lock_type lock_type)
{
  char name[FN_REFLEN];
  File file;
  TABLE *table;
  int error;
  String *field_term=ex->field_term,*escaped=ex->escaped,
    *enclosed=ex->enclosed;
93
  bool is_fifo=0;
94
  LOAD_FILE_INFO lf_info;
monty@narttu.mysql.fi's avatar
monty@narttu.mysql.fi committed
95 96 97
  char *db = table_list->db;			// This is never null
  /* If no current database, use database where table is located */
  char *tdb= thd->db ? thd->db : db;
98
  bool transactional_table, log_delayed;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
99 100
  DBUG_ENTER("mysql_load");

101 102 103 104
#ifdef EMBEDDED_LIBRARY
  read_file_from_client  = 0; //server is always in the same process 
#endif

bk@work.mysql.com's avatar
bk@work.mysql.com committed
105 106 107 108 109 110 111 112
  if (escaped->length() > 1 || enclosed->length() > 1)
  {
    my_message(ER_WRONG_FIELD_TERMINATORS,ER(ER_WRONG_FIELD_TERMINATORS),
	       MYF(0));
    DBUG_RETURN(-1);
  }
  if (!(table = open_ltable(thd,table_list,lock_type)))
    DBUG_RETURN(-1);
113 114 115
  transactional_table= table->file->has_transactions();
  log_delayed= (transactional_table || table->tmp_table);

bk@work.mysql.com's avatar
bk@work.mysql.com committed
116 117 118 119 120 121 122 123 124
  if (!fields.elements)
  {
    Field **field;
    for (field=table->field; *field ; field++)
      fields.push_back(new Item_field(*field));
  }
  else
  {						// Part field list
    thd->dupp_field=0;
125 126
    if (setup_tables(table_list) ||
	setup_fields(thd, 0, table_list, fields, 1, 0, 0))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
127 128 129 130 131 132 133 134 135 136
      DBUG_RETURN(-1);
    if (thd->dupp_field)
    {
      my_error(ER_FIELD_SPECIFIED_TWICE, MYF(0), thd->dupp_field->field_name);
      DBUG_RETURN(-1);
    }
  }

  uint tot_length=0;
  bool use_blobs=0,use_timestamp=0;
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
137
  List_iterator_fast<Item> it(fields);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164

  Item_field *field;
  while ((field=(Item_field*) it++))
  {
    if (field->field->flags & BLOB_FLAG)
    {
      use_blobs=1;
      tot_length+=256;				// Will be extended if needed
    }
    else
      tot_length+=field->field->field_length;
    if (!field_term->length() && !(field->field->flags & NOT_NULL_FLAG))
      field->field->set_notnull();
    if (field->field == table->timestamp_field)
      use_timestamp=1;
  }
  if (use_blobs && !ex->line_term->length() && !field_term->length())
  {
    my_message(ER_BLOBS_AND_NO_TERMINATED,ER(ER_BLOBS_AND_NO_TERMINATED),
	       MYF(0));
    DBUG_RETURN(-1);
  }

  /* We can't give an error in the middle when using LOCAL files */
  if (read_file_from_client && handle_duplicates == DUP_ERROR)
    handle_duplicates=DUP_IGNORE;

165
#ifndef EMBEDDED_LIBRARY
166
  if (read_file_from_client)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
167
  {
168
    (void)net_request_file(&thd->net,ex->file_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
169 170 171
    file = -1;
  }
  else
172
#endif
bk@work.mysql.com's avatar
bk@work.mysql.com committed
173 174 175 176 177 178
  {
    read_file_from_client=0;
#ifdef DONT_ALLOW_FULL_LOAD_DATA_PATHS
    ex->file_name+=dirname_length(ex->file_name);
#endif
    if (!dirname_length(ex->file_name) &&
179
	strlen(ex->file_name)+strlen(mysql_data_home)+strlen(tdb)+3 <
bk@work.mysql.com's avatar
bk@work.mysql.com committed
180 181
	FN_REFLEN)
    {
182
      (void) sprintf(name,"%s/%s/%s",mysql_data_home,tdb,ex->file_name);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
183 184 185 186 187
      unpack_filename(name,name);		/* Convert to system format */
    }
    else
    {
      unpack_filename(name,ex->file_name);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
188
#if !defined(__WIN__) && !defined(OS2)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
189
      MY_STAT stat_info;
190
      if (!my_stat(name,&stat_info,MYF(MY_WME)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
191
	DBUG_RETURN(-1);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
192

193 194 195
      // if we are not in slave thread, the file must be:
      if (!thd->slave_thread &&
	  !((stat_info.st_mode & S_IROTH) == S_IROTH &&  // readable by others
196
#ifndef __EMX__
197
	    (stat_info.st_mode & S_IFLNK) != S_IFLNK && // and not a symlink
198
#endif
199 200
	    ((stat_info.st_mode & S_IFREG) == S_IFREG ||
	     (stat_info.st_mode & S_IFIFO) == S_IFIFO)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
201 202 203 204
      {
	my_error(ER_TEXTFILE_NOT_READABLE,MYF(0),name);
	DBUG_RETURN(-1);
      }
205 206
      if ((stat_info.st_mode & S_IFIFO) == S_IFIFO)
	is_fifo = 1;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
207 208 209 210 211 212 213 214 215 216 217
#endif
    }
    if ((file=my_open(name,O_RDONLY,MYF(MY_WME))) < 0)
      DBUG_RETURN(-1);
  }

  COPY_INFO info;
  bzero((char*) &info,sizeof(info));
  info.handle_duplicates=handle_duplicates;
  info.escape_char=escaped->length() ? (*escaped)[0] : INT_MAX;

bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
218 219
  READ_INFO read_info(file,tot_length,thd->db_charset,
		      *field_term,*ex->line_start, *ex->line_term, *enclosed,
220
		      info.escape_char, read_file_from_client, is_fifo);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
221 222 223 224 225 226 227
  if (read_info.error)
  {
    if	(file >= 0)
      my_close(file,MYF(0));			// no files in net reading
    DBUG_RETURN(-1);				// Can't allocate buffers
  }

228 229 230 231 232 233 234 235 236 237
  if (!opt_old_rpl_compat && mysql_bin_log.is_open())
  {
    lf_info.thd = thd;
    lf_info.ex = ex;
    lf_info.db = db;
    lf_info.table_name = table_list->real_name;
    lf_info.fields = &fields;
    lf_info.handle_dup = handle_duplicates;
    lf_info.wrote_create_file = 0;
    lf_info.last_pos_in_file = HA_POS_ERROR;
238
    lf_info.log_delayed= log_delayed;
239
    read_info.set_io_cache_arg((void*) &lf_info);
240
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
241 242 243 244 245 246
  restore_record(table,2);

  thd->count_cuted_fields=1;			/* calc cuted fields */
  thd->cuted_fields=0L;
  if (ex->line_term->length() && field_term->length())
  {
247 248 249
    // ex->skip_lines needs to be preserved for logging
    uint skip_lines = ex->skip_lines;
    while (skip_lines--)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
250 251 252 253 254 255 256 257 258 259 260
    {
      if (read_info.next_line())
	break;
    }
  }
  if (!(error=test(read_info.error)))
  {
    uint save_time_stamp=table->time_stamp;
    if (use_timestamp)
      table->time_stamp=0;
    table->next_number_field=table->found_next_number_field;
261 262
    VOID(table->file->extra_opt(HA_EXTRA_WRITE_CACHE,
			    thd->variables.read_buff_size));
263
    table->bulk_insert= 1;
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
264 265 266
    if (handle_duplicates == DUP_IGNORE ||
	handle_duplicates == DUP_REPLACE)
      table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
267
    table->file->deactivate_non_unique_index((ha_rows) 0);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
268 269 270 271 272
    table->copy_blobs=1;
    if (!field_term->length() && !enclosed->length())
      error=read_fixed_length(thd,info,table,fields,read_info);
    else
      error=read_sep_field(thd,info,table,fields,read_info,*enclosed);
273 274 275 276
    if (table->file->extra(HA_EXTRA_NO_CACHE))
      error=1;					/* purecov: inspected */
    if (table->file->activate_all_index(thd))
      error=1;					/* purecov: inspected */
monty@donna.mysql.com's avatar
monty@donna.mysql.com committed
277
    table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
278 279 280 281 282 283 284
    table->time_stamp=save_time_stamp;
    table->next_number_field=0;
  }
  if  (file >= 0) my_close(file,MYF(0));
  free_blobs(table);				/* if pack_blob was used */
  table->copy_blobs=0;
  thd->count_cuted_fields=0;			/* Don`t calc cuted fields */
285

bk@work.mysql.com's avatar
bk@work.mysql.com committed
286
  if (error)
287
  {
288
    if (transactional_table)
289
      ha_autocommit_or_rollback(thd,error);
290 291
    if (!opt_old_rpl_compat && mysql_bin_log.is_open())
    {
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
292 293
      if (lf_info.wrote_create_file)
      {
294 295 296 297 298 299 300 301 302 303 304 305 306 307
        /*
	  Make sure last block (the one which caused the error) gets logged.
	  This is needed because otherwise after write of
	  (to the binlog, not to read_info (which is a cache))
	  Delete_file_log_event the bad block will remain in read_info.
	  At the end of mysql_load(), the destructor of read_info will call
	  end_io_cache() which will flush read_info, so we will finally have
	  this in the binlog:
          	Append_block # The last successfull block
          	Delete_file
          	Append_block # The failing block
	  which is nonsense.
	*/
	read_info.end_io_cache();
308
        Delete_file_log_event d(thd, log_delayed);
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
309 310
        mysql_bin_log.write(&d);
      }
311
    }
312 313
    error= -1;				// Error on read
    goto err;
314
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
315 316
  sprintf(name,ER(ER_LOAD_INFO),info.records,info.deleted,
	  info.records-info.copied,thd->cuted_fields);
317
  send_ok(thd,info.copied+info.deleted,0L,name);
318
  // on the slave thd->query is never initialized
319
  if (!thd->slave_thread)
320
    mysql_update_log.write(thd,thd->query,thd->query_length);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
321

322
  if (!log_delayed)
323
    thd->options|=OPTION_STATUS_NO_TRANS_UPDATE;
324
  if (mysql_bin_log.is_open())
325
  {
326
    if (opt_old_rpl_compat)
327
    {
328 329 330 331 332 333
      if (!read_file_from_client)
      {
	Load_log_event qinfo(thd, ex, db, table->table_name, fields, 
			     handle_duplicates, log_delayed);
	mysql_bin_log.write(&qinfo);
      }
334
    }
335
    else
336 337
    {
      read_info.end_io_cache(); // make sure last block gets logged
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
338 339
      if (lf_info.wrote_create_file)
      {
340
        Execute_load_log_event e(thd, log_delayed);
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
341 342
        mysql_bin_log.write(&e);
      }
343
    }
344
  }
345
  if (transactional_table)
346
    error=ha_autocommit_or_rollback(thd,error); 
347
  query_cache_invalidate3(thd, table_list, 0);
348 349 350 351 352 353 354

err:
  if (thd->lock)
  {
    mysql_unlock_tables(thd, thd->lock);
    thd->lock=0;
  }
355
  DBUG_RETURN(error);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
356 357
}

358
#endif /* EMBEDDED_LIBRARY */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
359 360 361 362 363 364 365 366 367

/****************************************************************************
** Read of rows of fixed size + optional garage + optonal newline
****************************************************************************/

static int
read_fixed_length(THD *thd,COPY_INFO &info,TABLE *table,List<Item> &fields,
		  READ_INFO &read_info)
{
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
368
  List_iterator_fast<Item> it(fields);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
369
  Item_field *sql_field;
370
  ulonglong id;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
371 372
  DBUG_ENTER("read_fixed_length");

373
  id= 0;
374
  
bk@work.mysql.com's avatar
bk@work.mysql.com committed
375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392
  /* No fields can be null in this format. mark all fields as not null */
  while ((sql_field= (Item_field*) it++))
      sql_field->field->set_notnull();

  while (!read_info.read_fixed_length())
  {
    if (thd->killed)
    {
      my_error(ER_SERVER_SHUTDOWN,MYF(0));
      DBUG_RETURN(1);
    }
    it.rewind();
    byte *pos=read_info.row_start;
#ifdef HAVE_purify
    read_info.row_end[0]=0;
#endif
    while ((sql_field= (Item_field*) it++))
    {
393
      Field *field= sql_field->field;                  
bk@work.mysql.com's avatar
bk@work.mysql.com committed
394 395
      if (pos == read_info.row_end)
      {
396 397 398
        thd->cuted_fields++;			/* Not enough fields */
        push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
                            ER_WARN_TOO_FEW_RECORDS, 
399 400
                            ER(ER_WARN_TOO_FEW_RECORDS), thd->row_count);
	      field->reset();
bk@work.mysql.com's avatar
bk@work.mysql.com committed
401 402 403 404 405 406 407 408 409
      }
      else
      {
	uint length;
	byte save_chr;
	if ((length=(uint) (read_info.row_end-pos)) >
	    field->field_length)
	  length=field->field_length;
	save_chr=pos[length]; pos[length]='\0'; // Safeguard aganst malloc
410
  field->store((char*) pos,length,read_info.read_charset);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
411 412 413 414 415 416
	pos[length]=save_chr;
	if ((pos+=length) > read_info.row_end)
	  pos= read_info.row_end;	/* Fills rest with space */
      }
    }
    if (pos != read_info.row_end)
417
    {
bk@work.mysql.com's avatar
bk@work.mysql.com committed
418
      thd->cuted_fields++;			/* To long row */
419 420
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
                          ER_WARN_TOO_MANY_RECORDS, 
421
                          ER(ER_WARN_TOO_MANY_RECORDS), thd->row_count); 
422
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
423 424
    if (write_record(table,&info))
      DBUG_RETURN(1);
425 426 427 428 429 430 431 432
    /*
      If auto_increment values are used, save the first one
       for LAST_INSERT_ID() and for the binary/update log.
       We can't use insert_id() as we don't want to touch the
       last_insert_id_used flag.
    */
    if (!id && thd->insert_id_used)
      id= thd->last_insert_id;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
433 434
    if (table->next_number_field)
      table->next_number_field->reset();	// Clear for next record
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
435
    if (read_info.next_line())			// Skip to next line
bk@work.mysql.com's avatar
bk@work.mysql.com committed
436 437
      break;
    if (read_info.line_cuted)
438
    {
bk@work.mysql.com's avatar
bk@work.mysql.com committed
439
      thd->cuted_fields++;			/* To long row */
440 441
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
                          ER_WARN_TOO_MANY_RECORDS, 
442
                          ER(ER_WARN_TOO_MANY_RECORDS), thd->row_count); 
443
    }
444
    thd->row_count++;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
445
  }
446 447
  if (id && !read_info.error)
    thd->insert_id(id);			// For binary/update log
bk@work.mysql.com's avatar
bk@work.mysql.com committed
448 449 450 451 452 453 454 455 456 457
  DBUG_RETURN(test(read_info.error));
}



static int
read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
	       List<Item> &fields, READ_INFO &read_info,
	       String &enclosed)
{
monty@tik.mysql.fi's avatar
monty@tik.mysql.fi committed
458
  List_iterator_fast<Item> it(fields);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
459 460
  Item_field *sql_field;
  uint enclosed_length;
461
  ulonglong id;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
462 463 464
  DBUG_ENTER("read_sep_field");

  enclosed_length=enclosed.length();
465 466
  id= 0;

bk@work.mysql.com's avatar
bk@work.mysql.com committed
467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494
  for (;;it.rewind())
  {
    if (thd->killed)
    {
      my_error(ER_SERVER_SHUTDOWN,MYF(0));
      DBUG_RETURN(1);
    }
    while ((sql_field=(Item_field*) it++))
    {
      uint length;
      byte *pos;

      if (read_info.read_field())
	break;
      pos=read_info.row_start;
      length=(uint) (read_info.row_end-pos);
      Field *field=sql_field->field;

      if (!read_info.enclosed &&
	  (enclosed_length && length == 4 && !memcmp(pos,"NULL",4)) ||
	  (length == 1 && read_info.found_null))
      {
	field->reset();
	field->set_null();
	if (!field->maybe_null())
	{
	  if (field->type() == FIELD_TYPE_TIMESTAMP)
	    ((Field_timestamp*) field)->set_time();
495 496 497
	  else if (field != table->next_number_field)      
      field->set_warning((uint)MYSQL_ERROR::WARN_LEVEL_WARN, 
                         ER_WARN_NULL_TO_NOTNULL);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
498 499 500 501 502
	}
	continue;
      }
      field->set_notnull();
      read_info.row_end[0]=0;			// Safe to change end marker
503
      field->store((char*) read_info.row_start,length,read_info.read_charset);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
504 505 506 507 508 509 510
    }
    if (read_info.error)
      break;
    if (sql_field)
    {						// Last record
      if (sql_field == (Item_field*) fields.head())
	break;
511
      for (; sql_field ; sql_field=(Item_field*) it++)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
512 513 514 515
      {
	sql_field->field->set_null();
	sql_field->field->reset();
	thd->cuted_fields++;
516 517
 	push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
                	    ER_WARN_TOO_FEW_RECORDS,
518
                	    ER(ER_WARN_TOO_FEW_RECORDS), thd->row_count);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
519 520 521 522
      }
    }
    if (write_record(table,&info))
      DBUG_RETURN(1);
523 524 525 526 527 528 529 530
    /*
      If auto_increment values are used, save the first one
       for LAST_INSERT_ID() and for the binary/update log.
       We can't use insert_id() as we don't want to touch the
       last_insert_id_used flag.
    */
    if (!id && thd->insert_id_used)
      id= thd->last_insert_id;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
531 532
    if (table->next_number_field)
      table->next_number_field->reset();	// Clear for next record
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
533
    if (read_info.next_line())			// Skip to next line
bk@work.mysql.com's avatar
bk@work.mysql.com committed
534 535
      break;
    if (read_info.line_cuted)
536
    {
bk@work.mysql.com's avatar
bk@work.mysql.com committed
537
      thd->cuted_fields++;			/* To long row */
538
      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
539 540
                          ER_WARN_TOO_MANY_RECORDS, ER(ER_WARN_TOO_MANY_RECORDS), 
                          thd->row_count);   
541
    }
542
    thd->row_count++;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
543
  }
544 545
  if (id && !read_info.error)
    thd->insert_id(id);			// For binary/update log
bk@work.mysql.com's avatar
bk@work.mysql.com committed
546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569
  DBUG_RETURN(test(read_info.error));
}


/* Unescape all escape characters, mark \N as null */

char
READ_INFO::unescape(char chr)
{
  switch(chr) {
  case 'n': return '\n';
  case 't': return '\t';
  case 'r': return '\r';
  case 'b': return '\b';
  case '0': return 0;				// Ascii null
  case 'Z': return '\032';			// Win32 end of file
  case 'N': found_null=1;

    /* fall through */
  default:  return chr;
  }
}


570 571 572 573
/*
  Read a line using buffering
  If last line is empty (in line mode) then it isn't outputed
*/
bk@work.mysql.com's avatar
bk@work.mysql.com committed
574 575


bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
576 577
READ_INFO::READ_INFO(File file_par, uint tot_length, CHARSET_INFO *cs,
		     String &field_term, String &line_start, String &line_term,
578 579
		     String &enclosed_par, int escape, bool get_it_from_net,
		     bool is_fifo)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
580 581
  :file(file_par),escape_char(escape)
{
bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
582
  read_charset= cs;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623
  field_term_ptr=(char*) field_term.ptr();
  field_term_length= field_term.length();
  line_term_ptr=(char*) line_term.ptr();
  line_term_length= line_term.length();
  if (line_start.length() == 0)
  {
    line_start_ptr=0;
    start_of_line= 0;
  }
  else
  {
    line_start_ptr=(char*) line_start.ptr();
    line_start_end=line_start_ptr+line_start.length();
    start_of_line= 1;
  }
  /* If field_terminator == line_terminator, don't use line_terminator */
  if (field_term_length == line_term_length &&
      !memcmp(field_term_ptr,line_term_ptr,field_term_length))
  {
    line_term_length=0;
    line_term_ptr=(char*) "";
  }
  enclosed_char= (enclosed_length=enclosed_par.length()) ?
    (uchar) enclosed_par[0] : INT_MAX;
  field_term_char= field_term_length ? (uchar) field_term_ptr[0] : INT_MAX;
  line_term_char= line_term_length ? (uchar) line_term_ptr[0] : INT_MAX;
  error=eof=found_end_of_line=found_null=line_cuted=0;
  buff_length=tot_length;


  /* Set of a stack for unget if long terminators */
  uint length=max(field_term_length,line_term_length)+1;
  set_if_bigger(length,line_start.length());
  stack=stack_pos=(int*) sql_alloc(sizeof(int)*length);

  if (!(buffer=(byte*) my_malloc(buff_length+1,MYF(0))))
    error=1; /* purecov: inspected */
  else
  {
    end_of_buff=buffer+buff_length;
    if (init_io_cache(&cache,(get_it_from_net) ? -1 : file, 0,
624 625
		      (get_it_from_net) ? READ_NET :
		      (is_fifo ? READ_FIFO : READ_CACHE),0L,1,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
626 627 628 629 630
		      MYF(MY_WME)))
    {
      my_free((gptr) buffer,MYF(0)); /* purecov: inspected */
      error=1;
    }
631 632
    else 
    {
633 634 635 636 637
      /*
	init_io_cache() will not initialize read_function member
	if the cache is READ_NET. The reason is explained in
	mysys/mf_iocache.c. So we work around the problem with a
	manual assignment
sasha@mysql.sashanet.com's avatar
sasha@mysql.sashanet.com committed
638 639 640
      */
      if (get_it_from_net)
	cache.read_function = _my_b_net_read;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
641

642
      need_end_io_cache = 1;
643
#ifndef EMBEDDED_LIBRARY
644 645
      if (!opt_old_rpl_compat && mysql_bin_log.is_open())
	cache.pre_read = cache.pre_close =
monty@bitch.mysql.fi's avatar
monty@bitch.mysql.fi committed
646
	  (IO_CACHE_CALLBACK) log_loaded_block;
647
#endif
648
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
649 650 651 652 653 654 655 656
  }
}


READ_INFO::~READ_INFO()
{
  if (!error)
  {
657 658
    if (need_end_io_cache)
      ::end_io_cache(&cache);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697
    my_free((gptr) buffer,MYF(0));
    error=1;
  }
}


#define GET (stack_pos != stack ? *--stack_pos : my_b_get(&cache))
#define PUSH(A) *(stack_pos++)=(A)


inline int READ_INFO::terminator(char *ptr,uint length)
{
  int chr=0;					// Keep gcc happy
  uint i;
  for (i=1 ; i < length ; i++)
  {
    if ((chr=GET) != *++ptr)
    {
      break;
    }
  }
  if (i == length)
    return 1;
  PUSH(chr);
  while (i-- > 1)
    PUSH((uchar) *--ptr);
  return 0;
}


int READ_INFO::read_field()
{
  int chr,found_enclosed_char;
  byte *to,*new_buffer;

  found_null=0;
  if (found_end_of_line)
    return 1;					// One have to call next_line

monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
698
  /* Skip until we find 'line_start' */
bk@work.mysql.com's avatar
bk@work.mysql.com committed
699 700

  if (start_of_line)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
701
  {						// Skip until line_start
bk@work.mysql.com's avatar
bk@work.mysql.com committed
702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728
    start_of_line=0;
    if (find_start_of_fields())
      return 1;
  }
  if ((chr=GET) == my_b_EOF)
  {
    found_end_of_line=eof=1;
    return 1;
  }
  to=buffer;
  if (chr == enclosed_char)
  {
    found_enclosed_char=enclosed_char;
    *to++=(byte) chr;				// If error
  }
  else
  {
    found_enclosed_char= INT_MAX;
    PUSH(chr);
  }

  for (;;)
  {
    while ( to < end_of_buff)
    {
      chr = GET;
#ifdef USE_MB
bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
729
      if (use_mb(read_charset) &&
730
          (my_mbcharlen(read_charset, chr) >1 )&&
bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
731
          to+my_mbcharlen(read_charset, chr) <= end_of_buff)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
732 733 734
      {
	  uchar* p = (uchar*)to;
	  *to++ = chr;
bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
735
	  int ml = my_mbcharlen(read_charset, chr);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
736 737 738 739 740 741 742
	  int i;
	  for (i=1; i<ml; i++) {
	      chr = GET;
	      if (chr == my_b_EOF)
		  goto found_eof;
	      *to++ = chr;
	  }
bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
743
	  if (my_ismbchar(read_charset,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843
                          (const char *)p,
                          (const char *)to))
	    continue;
	  for (i=0; i<ml; i++)
	    PUSH((uchar) *--to);
	  chr = GET;
      }
#endif
      if (chr == my_b_EOF)
	goto found_eof;
      if (chr == escape_char)
      {
	if ((chr=GET) == my_b_EOF)
	{
	  *to++= (byte) escape_char;
	  goto found_eof;
	}
	*to++ = (byte) unescape((char) chr);
	continue;
      }
#ifdef ALLOW_LINESEPARATOR_IN_STRINGS
      if (chr == line_term_char)
#else
      if (chr == line_term_char && found_enclosed_char == INT_MAX)
#endif
      {
	if (terminator(line_term_ptr,line_term_length))
	{					// Maybe unexpected linefeed
	  enclosed=0;
	  found_end_of_line=1;
	  row_start=buffer;
	  row_end=  to;
	  return 0;
	}
      }
      if (chr == found_enclosed_char)
      {
	if ((chr=GET) == found_enclosed_char)
	{					// Remove dupplicated
	  *to++ = (byte) chr;
	  continue;
	}
	// End of enclosed field if followed by field_term or line_term
	if (chr == my_b_EOF ||
	    chr == line_term_char && terminator(line_term_ptr,
						line_term_length))
	{					// Maybe unexpected linefeed
	  enclosed=1;
	  found_end_of_line=1;
	  row_start=buffer+1;
	  row_end=  to;
	  return 0;
	}
	if (chr == field_term_char &&
	    terminator(field_term_ptr,field_term_length))
	{
	  enclosed=1;
	  row_start=buffer+1;
	  row_end=  to;
	  return 0;
	}
	/* Copy the found '"' character */
	PUSH(chr);
	chr='"';
      }
      else if (chr == field_term_char && found_enclosed_char == INT_MAX)
      {
	if (terminator(field_term_ptr,field_term_length))
	{
	  enclosed=0;
	  row_start=buffer;
	  row_end=  to;
	  return 0;
	}
      }
      *to++ = (byte) chr;
    }
    /*
    ** We come here if buffer is too small. Enlarge it and continue
    */
    if (!(new_buffer=(byte*) my_realloc((char*) buffer,buff_length+1+IO_SIZE,
					MYF(MY_WME))))
      return (error=1);
    to=new_buffer + (to-buffer);
    buffer=new_buffer;
    buff_length+=IO_SIZE;
    end_of_buff=buffer+buff_length;
  }

found_eof:
  enclosed=0;
  found_end_of_line=eof=1;
  row_start=buffer;
  row_end=to;
  return 0;
}

/*
** One can't use fixed length with multi-byte charset **
*/
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
844

bk@work.mysql.com's avatar
bk@work.mysql.com committed
845 846 847 848 849 850 851 852
int READ_INFO::read_fixed_length()
{
  int chr;
  byte *to;
  if (found_end_of_line)
    return 1;					// One have to call next_line

  if (start_of_line)
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
853
  {						// Skip until line_start
bk@work.mysql.com's avatar
bk@work.mysql.com committed
854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911
    start_of_line=0;
    if (find_start_of_fields())
      return 1;
  }

  to=row_start=buffer;
  while (to < end_of_buff)
  {
    if ((chr=GET) == my_b_EOF)
      goto found_eof;
    if (chr == escape_char)
    {
      if ((chr=GET) == my_b_EOF)
      {
	*to++= (byte) escape_char;
	goto found_eof;
      }
      *to++ =(byte) unescape((char) chr);
      continue;
    }
    if (chr == line_term_char)
    {
      if (terminator(line_term_ptr,line_term_length))
      {						// Maybe unexpected linefeed
	found_end_of_line=1;
	row_end=  to;
	return 0;
      }
    }
    *to++ = (byte) chr;
  }
  row_end=to;					// Found full line
  return 0;

found_eof:
  found_end_of_line=eof=1;
  row_start=buffer;
  row_end=to;
  return to == buffer ? 1 : 0;
}


int READ_INFO::next_line()
{
  line_cuted=0;
  start_of_line= line_start_ptr != 0;
  if (found_end_of_line || eof)
  {
    found_end_of_line=0;
    return eof;
  }
  found_end_of_line=0;
  if (!line_term_length)
    return 0;					// No lines
  for (;;)
  {
    int chr = GET;
#ifdef USE_MB
912
   if (use_mb(read_charset) && (my_mbcharlen(read_charset, chr) >1 ))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
913 914
   {
       for (int i=1;
bar@bar.mysql.r18.ru's avatar
bar@bar.mysql.r18.ru committed
915
            chr != my_b_EOF && i<my_mbcharlen(read_charset, chr);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967
            i++)
	   chr = GET;
       if (chr == escape_char)
	   continue;
   }
#endif
   if (chr == my_b_EOF)
   {
      eof=1;
      return 1;
    }
    if (chr == escape_char)
    {
      line_cuted=1;
      if (GET == my_b_EOF)
	return 1;
      continue;
    }
    if (chr == line_term_char && terminator(line_term_ptr,line_term_length))
      return 0;
    line_cuted=1;
  }
}


bool READ_INFO::find_start_of_fields()
{
  int chr;
 try_again:
  do
  {
    if ((chr=GET) == my_b_EOF)
    {
      found_end_of_line=eof=1;
      return 1;
    }
  } while ((char) chr != line_start_ptr[0]);
  for (char *ptr=line_start_ptr+1 ; ptr != line_start_end ; ptr++)
  {
    chr=GET;					// Eof will be checked later
    if ((char) chr != *ptr)
    {						// Can't be line_start
      PUSH(chr);
      while (--ptr != line_start_ptr)
      {					// Restart with next char
	PUSH((uchar) *ptr);
      }
      goto try_again;
    }
  }
  return 0;
}