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cdd20d7292e9a9340c02b0769d19efec5533c4b4
mariadb/sql/sql_load.cc
unknown 32b28f9298 WL#1266 "Separate auto-set logic from TIMESTAMP type." 
Final version of patch.

Adds support for specifying of DEFAULT NOW() and/or ON UPDATE NOW()
clauses for TIMESTAMP field definition.
Current implementation allows only one such field per table and
uses several unireg types for storing info about this properties of
field. It should be replaced with better implementation when new
.frm format is introduced.


include/mysqld_error.h:
  Added error codes for case when we have more than one column with NOW()
  in DEFAULT or ON UPDATE clauses and for case when we are using ON UPDATE
  clause with wrong type.
mysql-test/r/create.result:
  Added tests for using of DEFAULT NOW() and ON UPDATE NOW() with
  non-TIMESTAMP fields.
mysql-test/r/show_check.result:
  Updated test results to reflect new default look of TIMESTAMP fields
  in SHOW CREATE TABLE.
mysql-test/r/system_mysql_db.result:
  Updated test results to reflect new default look of TIMESTAMP fields
  in SHOW CREATE TABLE.
mysql-test/r/type_ranges.result:
  Updated test results to reflect new default look of TIMESTAMP fields
  in SHOW COLUMNS.
mysql-test/r/type_timestamp.result:
  Added tests for various DEFAULT and ON UPDATE clauses for TIMESTAMP
  fields definitions.
mysql-test/t/create.test:
  Added tests for using of DEFAULT NOW() and ON UPDATE NOW() with
  non-TIMESTAMP fields.
mysql-test/t/type_timestamp.test:
  Added tests for various DEFAULT and ON UPDATE clauses for TIMESTAMP
  fields definitions.
sql/field.cc:
  Added support for various combinations of DEFAULT and ON UPDATE clauses
  for TIMESTAMP field. 
  
  Setting TABLE::timestamp* members for TIMESTAMP fields with auto-set 
  option taking into account their unireg type (which corresponds to 
  various DEFAULT/ON UPDATE values combinations). Replaced 
  TABLE::time_stamp with TABLE::timestamp_default_now/on_update_now
  couple moved their setup to separate method set_timestamp_offsets(),
  which now is called from  open_table instead of Field_timestamp cons.
sql/field.h:
  Added more unireg types for handling of DEFAULT NOW() and ON UPDATE
  NOW() for TIMESTAMP fields.
  Fixed value corresponding to DEFAULT item for TIMESTAMP field.
sql/ha_berkeley.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_heap.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_innodb.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_isam.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_isammrg.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_myisam.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/ha_myisammrg.cc:
  Now TIMESTAMP column with auto-set property could be updated during
  INSERT or/and UPDATE independently.
sql/item_func.h:
  We need to distinguish NOW() from other function for using in 
  DEFAULT and in ON UPDATE clauses.
sql/item_timefunc.h:
  We need to distinguish NOW() from other function for using in 
  DEFAULT and in ON UPDATE clauses.
sql/mysql_priv.h:
  Added parameter for ON UPDATE value to add_field_to_list() function.
sql/share/czech/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/danish/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/dutch/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/english/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/estonian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/french/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/german/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/greek/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/hungarian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/italian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/japanese/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/korean/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/norwegian-ny/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/norwegian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/polish/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/portuguese/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/romanian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/russian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/serbian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/slovak/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/spanish/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/swedish/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/share/ukrainian/errmsg.txt:
  Added error messages for case when we have more than one column with
  NOW() (CURRENT_TIMESTAMP is just more standard alias) in DEFAULT or 
  ON UPDATE clauses and for case when we are using ON UPDATE clause with
  wrong type.
sql/sql_base.cc:
  Added setup of TABLE::timestamp_default_now/on_update_now pair
  for each statement to open_table().
sql/sql_insert.cc:
  Using TABLE::timestamp_default_now/on_update_now pair instead of
  old TABLE::time_stamp. Added check for case then REPLACE could not
  be converted to UPDATE because of different DEFAULT/ON UPDATE values
  for TIMESTAMP field.
sql/sql_lex.h:
  Added member for value used in ON UPDATE clause to st_lex.
sql/sql_load.cc:
  Using TABLE::timestamp_default_now/on_update_now pair instead of
  old TABLE::time_stamp. We don't need to restore these members
  since they are set up for each statement in open_table().
sql/sql_parse.cc:
  Added handling of DEFAULT NOW() and ON UPDATE NOW() clauses for
  TIMESTAMP fields to add_field_to_list() function.
sql/sql_show.cc:
  Added support for DEFAULT CURRENT_TIMESTAMP (aka NOW() ) and 
  ON UPDATE CURRENT_TIMESTAMP to SHOW CREATE TABLE and SHOW COLUMNS.
sql/sql_table.cc:
  mysql_create_table() function - added check for number of TIMESTAMP 
    fields with auto-set values and replacing of old style TIMESTAMPs
    with their newer analogs.
  mysql_alter_table(): Using TABLE::timestamp_default_now/on_update_now 
    pair instead of old TABLE::time_stamp. We don't need to restore these
    members since they are set up for each statement in open_table().
sql/sql_update.cc:
  Left only setting of TABLE::timestamp_default_now/on_update_now
  to 0 since they should be already set up in open_table().
sql/sql_yacc.yy:
  Added support for DEFAULT NOW() and ON UPDATE NOW() in field
  definitions.
sql/table.h:
  Replaced TABLE::time_stamp withTABLE::timestamp_default_now/timestamp_on_update_now
  pair which allows to distinguish TIMESTAMP's with various DEFAULT/ON UPDATE
  clauses and optimize checks if TIMESTAMP field should be set to NOW()
  in handlers.
sql/unireg.cc:
  Now we are marking only TIMESTAMP fields with NOW() as default or
  as on update value as special field for unireg.
2004-04-02 10:12:53 +04:00

1030 lines
27 KiB
C++
Raw Blame History

/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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.
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.
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>
#include "sql_repl.h"
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;
bool need_end_io_cache;
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 */
CHARSET_INFO *read_charset;
READ_INFO(File file,uint tot_length,CHARSET_INFO *cs,
String &field_term,String &line_start,String &line_term,
String &enclosed,int escape,bool get_it_from_net, bool is_fifo);
~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();
/*
We need to force cache close before destructor is invoked to log
the last read block
*/
void end_io_cache()
{
::end_io_cache(&cache);
need_end_io_cache = 0;
}
/*
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
*/
void set_io_cache_arg(void* arg) { cache.arg = arg; }
};
static int read_fixed_length(THD *thd,COPY_INFO &info,TABLE *table,
List<Item> &fields, READ_INFO &read_info,
ulong skip_lines);
static int read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
List<Item> &fields, READ_INFO &read_info,
String &enclosed, ulong skip_lines);
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;
String *enclosed=ex->enclosed;
bool is_fifo=0;
#ifndef EMBEDDED_LIBRARY
LOAD_FILE_INFO lf_info;
#endif
char *db = table_list->db; // This is never null
/*
If path for file is not defined, we will use the current database.
If this is not set, we will use the directory where the table to be
loaded is located
*/
char *tdb= thd->db ? thd->db : db; // Result is never null
bool transactional_table, log_delayed;
ulong skip_lines= ex->skip_lines;
DBUG_ENTER("mysql_load");
#ifdef EMBEDDED_LIBRARY
read_file_from_client = 0; //server is always in the same process
#endif
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);
transactional_table= table->file->has_transactions();
log_delayed= (transactional_table || table->tmp_table);
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;
if (setup_tables(table_list) ||
setup_fields(thd, 0, table_list, fields, 1, 0, 0))
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;
List_iterator_fast<Item> it(fields);
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;
#ifndef EMBEDDED_LIBRARY
if (read_file_from_client)
{
(void)net_request_file(&thd->net,ex->file_name);
file = -1;
}
else
#endif
{
#ifdef DONT_ALLOW_FULL_LOAD_DATA_PATHS
ex->file_name+=dirname_length(ex->file_name);
#endif
if (!dirname_length(ex->file_name) &&
strlen(ex->file_name)+strlen(mysql_data_home)+strlen(tdb)+3 <
FN_REFLEN)
{
(void) sprintf(name,"%s/%s/%s",mysql_data_home,tdb,ex->file_name);
unpack_filename(name,name); /* Convert to system format */
}
else
{
#ifdef EMBEDDED_LIBRARY
char *chk_name= ex->file_name;
while ((*chk_name == ' ') || (*chk_name == 't'))
chk_name++;
if (*chk_name == FN_CURLIB)
{
sprintf(name, "%s%s", mysql_data_home, ex->file_name);
unpack_filename(name, name);
}
else
#endif /*EMBEDDED_LIBRARY*/
unpack_filename(name,ex->file_name);
#if !defined(__WIN__) && !defined(OS2) && ! defined(__NETWARE__)
MY_STAT stat_info;
if (!my_stat(name,&stat_info,MYF(MY_WME)))
DBUG_RETURN(-1);
// 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
#ifndef __EMX__
(stat_info.st_mode & S_IFLNK) != S_IFLNK && // and not a symlink
#endif
((stat_info.st_mode & S_IFREG) == S_IFREG ||
(stat_info.st_mode & S_IFIFO) == S_IFIFO)))
{
my_error(ER_TEXTFILE_NOT_READABLE,MYF(0),name);
DBUG_RETURN(-1);
}
if ((stat_info.st_mode & S_IFIFO) == S_IFIFO)
is_fifo = 1;
#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;
READ_INFO read_info(file,tot_length,thd->variables.collation_database,
*field_term,*ex->line_start, *ex->line_term, *enclosed,
info.escape_char, read_file_from_client, is_fifo);
if (read_info.error)
{
if (file >= 0)
my_close(file,MYF(0)); // no files in net reading
DBUG_RETURN(-1); // Can't allocate buffers
}
#ifndef EMBEDDED_LIBRARY
if (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;
lf_info.log_delayed= log_delayed;
read_info.set_io_cache_arg((void*) &lf_info);
}
#endif /*!EMBEDDED_LIBRARY*/
restore_record(table,default_values);
thd->count_cuted_fields= CHECK_FIELD_WARN; /* calc cuted fields */
thd->cuted_fields=0L;
/* Skip lines if there is a line terminator */
if (ex->line_term->length())
{
/* ex->skip_lines needs to be preserved for logging */
while (skip_lines > 0)
{
skip_lines--;
if (read_info.next_line())
break;
}
}
if (!(error=test(read_info.error)))
{
if (use_timestamp)
table->timestamp_default_now= table->timestamp_on_update_now= 0;
table->next_number_field=table->found_next_number_field;
VOID(table->file->extra_opt(HA_EXTRA_WRITE_CACHE,
thd->variables.read_buff_size));
table->bulk_insert= 1;
if (handle_duplicates == DUP_IGNORE ||
handle_duplicates == DUP_REPLACE)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
table->file->deactivate_non_unique_index((ha_rows) 0);
table->copy_blobs=1;
if (!field_term->length() && !enclosed->length())
error=read_fixed_length(thd,info,table,fields,read_info,
skip_lines);
else
error=read_sep_field(thd,info,table,fields,read_info,*enclosed,
skip_lines);
if (table->file->extra(HA_EXTRA_NO_CACHE))
error=1; /* purecov: inspected */
if (table->file->activate_all_index(thd))
error=1; /* purecov: inspected */
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
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= CHECK_FIELD_IGNORE;
/*
We must invalidate the table in query cache before binlog writing and
ha_autocommit_...
*/
query_cache_invalidate3(thd, table_list, 0);
if (error)
{
if (transactional_table)
ha_autocommit_or_rollback(thd,error);
#ifndef EMBEDDED_LIBRARY
if (mysql_bin_log.is_open())
{
/*
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 (because
pre_read is not called at the end of the last block; remember pre_read
is called whenever a new block is read from disk).
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.
Or could also be (for a small file)
Create_file # The failing block
which is nonsense (Delete_file is not written in this case, because:
Create_file has not been written, so Delete_file is not written, then
when read_info is destroyed end_io_cache() is called which writes
Create_file.
*/
read_info.end_io_cache();
/* If the file was not empty, wrote_create_file is true */
if (lf_info.wrote_create_file)
{
Delete_file_log_event d(thd, db, log_delayed);
mysql_bin_log.write(&d);
}
}
#endif /*!EMBEDDED_LIBRARY*/
error= -1; // Error on read
goto err;
}
sprintf(name, ER(ER_LOAD_INFO), (ulong) info.records, (ulong) info.deleted,
(ulong) (info.records - info.copied), (ulong) thd->cuted_fields);
send_ok(thd,info.copied+info.deleted,0L,name);
// on the slave thd->query is never initialized
if (!thd->slave_thread)
mysql_update_log.write(thd,thd->query,thd->query_length);
if (!log_delayed)
thd->options|=OPTION_STATUS_NO_TRANS_UPDATE;
#ifndef EMBEDDED_LIBRARY
if (mysql_bin_log.is_open())
{
/*
As already explained above, we need to call end_io_cache() or the last
block will be logged only after Execute_load_log_event (which is wrong),
when read_info is destroyed.
*/
read_info.end_io_cache();
if (lf_info.wrote_create_file)
{
Execute_load_log_event e(thd, db, log_delayed);
mysql_bin_log.write(&e);
}
}
#endif /*!EMBEDDED_LIBRARY*/
if (transactional_table)
error=ha_autocommit_or_rollback(thd,error);
err:
if (thd->lock)
{
mysql_unlock_tables(thd, thd->lock);
thd->lock=0;
}
DBUG_RETURN(error);
}
/****************************************************************************
** 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, ulong skip_lines)
{
List_iterator_fast<Item> it(fields);
Item_field *sql_field;
ulonglong id;
DBUG_ENTER("read_fixed_length");
id= 0;
/* 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);
}
if (skip_lines)
{
/*
We could implement this with a simple seek if:
- We are not using DATA INFILE LOCAL
- escape character is ""
- line starting prefix is ""
*/
skip_lines--;
continue;
}
it.rewind();
byte *pos=read_info.row_start;
#ifdef HAVE_purify
read_info.row_end[0]=0;
#endif
while ((sql_field= (Item_field*) it++))
{
Field *field= sql_field->field;
if (pos == read_info.row_end)
{
thd->cuted_fields++; /* Not enough fields */
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_TOO_FEW_RECORDS,
ER(ER_WARN_TOO_FEW_RECORDS), thd->row_count);
field->reset();
}
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
field->store((char*) pos,length,read_info.read_charset);
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)
{
thd->cuted_fields++; /* To long row */
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_TOO_MANY_RECORDS,
ER(ER_WARN_TOO_MANY_RECORDS), thd->row_count);
}
if (write_record(table,&info))
DBUG_RETURN(1);
/*
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;
if (table->next_number_field)
table->next_number_field->reset(); // Clear for next record
if (read_info.next_line()) // Skip to next line
break;
if (read_info.line_cuted)
{
thd->cuted_fields++; /* To long row */
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_TOO_MANY_RECORDS,
ER(ER_WARN_TOO_MANY_RECORDS), thd->row_count);
}
thd->row_count++;
}
if (id && !read_info.error)
thd->insert_id(id); // For binary/update log
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, ulong skip_lines)
{
List_iterator_fast<Item> it(fields);
Item_field *sql_field;
uint enclosed_length;
ulonglong id;
DBUG_ENTER("read_sep_field");
enclosed_length=enclosed.length();
id= 0;
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();
else if (field != table->next_number_field)
field->set_warning((uint)MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_NULL_TO_NOTNULL);
}
continue;
}
field->set_notnull();
read_info.row_end[0]=0; // Safe to change end marker
field->store((char*) read_info.row_start,length,read_info.read_charset);
}
if (read_info.error)
break;
if (skip_lines)
{
if (!--skip_lines)
thd->cuted_fields= 0L; // Reset warnings
continue;
}
if (sql_field)
{ // Last record
if (sql_field == (Item_field*) fields.head())
break;
for (; sql_field ; sql_field=(Item_field*) it++)
{
sql_field->field->set_null();
sql_field->field->reset();
thd->cuted_fields++;
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_TOO_FEW_RECORDS,
ER(ER_WARN_TOO_FEW_RECORDS), thd->row_count);
}
}
if (write_record(table,&info))
DBUG_RETURN(1);
/*
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;
if (table->next_number_field)
table->next_number_field->reset(); // Clear for next record
if (read_info.next_line()) // Skip to next line
break;
if (read_info.line_cuted)
{
thd->cuted_fields++; /* To long row */
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_TOO_MANY_RECORDS, ER(ER_WARN_TOO_MANY_RECORDS),
thd->row_count);
}
thd->row_count++;
}
if (id && !read_info.error)
thd->insert_id(id); // For binary/update log
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;
}
}
/*
Read a line using buffering
If last line is empty (in line mode) then it isn't outputed
*/
READ_INFO::READ_INFO(File file_par, uint tot_length, CHARSET_INFO *cs,
String &field_term, String &line_start, String &line_term,
String &enclosed_par, int escape, bool get_it_from_net,
bool is_fifo)
:file(file_par),escape_char(escape)
{
read_charset= cs;
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,
(get_it_from_net) ? READ_NET :
(is_fifo ? READ_FIFO : READ_CACHE),0L,1,
MYF(MY_WME)))
{
my_free((gptr) buffer,MYF(0)); /* purecov: inspected */
error=1;
}
else
{
/*
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
*/
need_end_io_cache = 1;
#ifndef EMBEDDED_LIBRARY
if (get_it_from_net)
cache.read_function = _my_b_net_read;
if (mysql_bin_log.is_open())
cache.pre_read = cache.pre_close =
(IO_CACHE_CALLBACK) log_loaded_block;
#endif
}
}
}
READ_INFO::~READ_INFO()
{
if (!error)
{
if (need_end_io_cache)
::end_io_cache(&cache);
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
/* Skip until we find 'line_start' */
if (start_of_line)
{ // Skip until line_start
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
if ((my_mbcharlen(read_charset, chr) > 1) &&
to+my_mbcharlen(read_charset, chr) <= end_of_buff)
{
uchar* p = (uchar*)to;
*to++ = chr;
int ml = my_mbcharlen(read_charset, chr);
int i;
for (i=1; i<ml; i++) {
chr = GET;
if (chr == my_b_EOF)
goto found_eof;
*to++ = chr;
}
if (my_ismbchar(read_charset,
(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;
}
/*
The string didn't terminate yet.
Store back next character for the loop
*/
PUSH(chr);
/* copy the found term character to 'to' */
chr= found_enclosed_char;
}
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;
}
/*
Read a row with fixed length.
NOTES
The row may not be fixed size on disk if there are escape
characters in the file.
IMPLEMENTATION NOTE
One can't use fixed length with multi-byte charset **
RETURN
0 ok
1 error
*/
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)
{ // Skip until line_start
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
if (my_mbcharlen(read_charset, chr) > 1)
{
for (int i=1;
chr != my_b_EOF && i<my_mbcharlen(read_charset, chr);
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;
}
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