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mariadb/sql/unireg.cc
unknown 1abab6c7c7 Bug #29325: 
By default MyISAM overwrites .MYD and .MYI files no 
DATA DIRECTORY option is used. This can lead to two tables
using the same .MYD and .MYI files (that can't be dropped).

To prevent CREATE TABLE from overwriting a file a new option
is introduced : keep_files_on_create
When this is on the CREATE TABLE throws an error if either
the .MYD or .MYI exists for a MyISAM table.
The option is off by default (resulting in compatible behavior).


include/my_base.h:
  Bug #29325: introduce keep_files_on_create
myisam/mi_create.c:
  Bug #29325: introduce keep_files_on_create
mysql-test/r/create.result:
  Bug #29325: test case
mysql-test/t/create.test:
  Bug #29325: test case
sql/ha_myisam.cc:
  Bug #29325: introduce keep_files_on_create
sql/set_var.cc:
  Bug #29325: introduce keep_files_on_create
sql/sql_class.h:
  Bug #29325: introduce keep_files_on_create
sql/sql_table.cc:
  Bug #29325: introduce keep_files_on_create
sql/unireg.cc:
  Bug #29325: introduce keep_files_on_create
2007-07-11 10:49:54 +03:00

902 lines
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/* Copyright (C) 2000-2006 MySQL 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; version 2 of the License.
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 */
/*
Functions to create a unireg form-file from a FIELD and a fieldname-fieldinfo
struct.
In the following functions FIELD * is an ordinary field-structure with
the following exeptions:
sc_length,typepos,row,kol,dtype,regnr and field need not to be set.
str is a (long) to record position where 0 is the first position.
*/
#define USES_TYPES
#include "mysql_priv.h"
#include <m_ctype.h>
#include <assert.h>
#define FCOMP 17 /* Bytes for a packed field */
static uchar * pack_screens(List<create_field> &create_fields,
uint *info_length, uint *screens, bool small_file);
static uint pack_keys(uchar *keybuff,uint key_count, KEY *key_info,
ulong data_offset);
static bool pack_header(uchar *forminfo,enum db_type table_type,
List<create_field> &create_fields,
uint info_length, uint screens, uint table_options,
ulong data_offset, handler *file);
static uint get_interval_id(uint *int_count,List<create_field> &create_fields,
create_field *last_field);
static bool pack_fields(File file, List<create_field> &create_fields,
ulong data_offset);
static bool make_empty_rec(THD *thd, int file, enum db_type table_type,
uint table_options,
List<create_field> &create_fields,
uint reclength, ulong data_offset);
/*
Create a frm (table definition) file
SYNOPSIS
mysql_create_frm()
thd Thread handler
file_name Name of file (including database and .frm)
db Name of database
table Name of table
create_info create info parameters
create_fields Fields to create
keys number of keys to create
key_info Keys to create
db_file Handler to use. May be zero, in which case we use
create_info->db_type
RETURN
0 ok
1 error
*/
bool mysql_create_frm(THD *thd, my_string file_name,
const char *db, const char *table,
HA_CREATE_INFO *create_info,
List<create_field> &create_fields,
uint keys, KEY *key_info,
handler *db_file)
{
LEX_STRING str_db_type;
uint reclength, info_length, screens, key_info_length, maxlength, tmp_len;
ulong key_buff_length;
File file;
ulong filepos, data_offset;
uchar fileinfo[64],forminfo[288],*keybuff;
TYPELIB formnames;
uchar *screen_buff;
char buff[128];
DBUG_ENTER("mysql_create_frm");
formnames.type_names=0;
if (!(screen_buff=pack_screens(create_fields,&info_length,&screens,0)))
DBUG_RETURN(1);
if (db_file == NULL)
db_file= get_new_handler((TABLE*) 0, thd->mem_root, create_info->db_type);
/* If fixed row records, we need one bit to check for deleted rows */
if (!(create_info->table_options & HA_OPTION_PACK_RECORD))
create_info->null_bits++;
data_offset= (create_info->null_bits + 7) / 8;
if (pack_header(forminfo, create_info->db_type,create_fields,info_length,
screens, create_info->table_options,
data_offset, db_file))
{
my_free((gptr) screen_buff,MYF(0));
if (thd->net.last_errno != ER_TOO_MANY_FIELDS)
DBUG_RETURN(1);
// Try again without UNIREG screens (to get more columns)
thd->net.last_error[0]=0;
if (!(screen_buff=pack_screens(create_fields,&info_length,&screens,1)))
DBUG_RETURN(1);
if (pack_header(forminfo, create_info->db_type, create_fields,info_length,
screens, create_info->table_options, data_offset, db_file))
{
my_free((gptr) screen_buff,MYF(0));
DBUG_RETURN(1);
}
}
reclength=uint2korr(forminfo+266);
/* Calculate extra data segment length */
str_db_type.str= (char *) ha_get_storage_engine(create_info->db_type);
str_db_type.length= strlen(str_db_type.str);
create_info->extra_size= (2 + str_db_type.length +
2 + create_info->connect_string.length);
if ((file=create_frm(thd, file_name, db, table, reclength, fileinfo,
create_info, keys)) < 0)
{
my_free((gptr) screen_buff,MYF(0));
DBUG_RETURN(1);
}
key_buff_length= uint4korr(fileinfo+47);
keybuff=(uchar*) my_malloc(key_buff_length, MYF(0));
key_info_length= pack_keys(keybuff, keys, key_info, data_offset);
VOID(get_form_pos(file,fileinfo,&formnames));
if (!(filepos=make_new_entry(file,fileinfo,&formnames,"")))
goto err;
maxlength=(uint) next_io_size((ulong) (uint2korr(forminfo)+1000));
int2store(forminfo+2,maxlength);
int4store(fileinfo+10,(ulong) (filepos+maxlength));
fileinfo[26]= (uchar) test((create_info->max_rows == 1) &&
(create_info->min_rows == 1) && (keys == 0));
int2store(fileinfo+28,key_info_length);
tmp_len= system_charset_info->cset->charpos(system_charset_info,
create_info->comment.str,
create_info->comment.str +
create_info->comment.length, 60);
if (tmp_len < create_info->comment.length)
{
(void) my_snprintf(buff, sizeof(buff), "Too long comment for table '%s'",
table);
if ((thd->variables.sql_mode &
(MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES)))
{
my_message(ER_UNKNOWN_ERROR, buff, MYF(0));
goto err;
}
push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_UNKNOWN_ERROR, ER(ER_UNKNOWN_ERROR), buff);
create_info->comment.length= tmp_len;
}
strmake((char*) forminfo+47, create_info->comment.str ?
create_info->comment.str : "", create_info->comment.length);
forminfo[46]=(uchar) create_info->comment.length;
if (my_pwrite(file,(byte*) fileinfo,64,0L,MYF_RW) ||
my_pwrite(file,(byte*) keybuff,key_info_length,
(ulong) uint2korr(fileinfo+6),MYF_RW))
goto err;
VOID(my_seek(file,
(ulong) uint2korr(fileinfo+6)+ (ulong) key_buff_length,
MY_SEEK_SET,MYF(0)));
if (make_empty_rec(thd,file,create_info->db_type,create_info->table_options,
create_fields,reclength, data_offset))
goto err;
int2store(buff, create_info->connect_string.length);
if (my_write(file, (const byte*)buff, 2, MYF(MY_NABP)) ||
my_write(file, (const byte*)create_info->connect_string.str,
create_info->connect_string.length, MYF(MY_NABP)))
goto err;
int2store(buff, str_db_type.length);
if (my_write(file, (const byte*)buff, 2, MYF(MY_NABP)) ||
my_write(file, (const byte*)str_db_type.str,
str_db_type.length, MYF(MY_NABP)))
goto err;
VOID(my_seek(file,filepos,MY_SEEK_SET,MYF(0)));
if (my_write(file,(byte*) forminfo,288,MYF_RW) ||
my_write(file,(byte*) screen_buff,info_length,MYF_RW) ||
pack_fields(file, create_fields, data_offset))
goto err;
#ifdef HAVE_CRYPTED_FRM
if (create_info->password)
{
char tmp=2,*disk_buff=0;
SQL_CRYPT *crypted=new SQL_CRYPT(create_info->password);
if (!crypted || my_pwrite(file,&tmp,1,26,MYF_RW)) // Mark crypted
goto err;
uint read_length=uint2korr(forminfo)-256;
VOID(my_seek(file,filepos+256,MY_SEEK_SET,MYF(0)));
if (read_string(file,(gptr*) &disk_buff,read_length))
goto err;
crypted->encode(disk_buff,read_length);
delete crypted;
if (my_pwrite(file,disk_buff,read_length,filepos+256,MYF_RW))
{
my_free(disk_buff,MYF(0));
goto err;
}
my_free(disk_buff,MYF(0));
}
#endif
my_free((gptr) screen_buff,MYF(0));
my_free((gptr) keybuff, MYF(0));
if (opt_sync_frm && !(create_info->options & HA_LEX_CREATE_TMP_TABLE) &&
my_sync(file, MYF(MY_WME)))
goto err2;
if (my_close(file,MYF(MY_WME)))
goto err3;
{
/*
Restore all UCS2 intervals.
HEX representation of them is not needed anymore.
*/
List_iterator<create_field> it(create_fields);
create_field *field;
while ((field=it++))
{
if (field->save_interval)
{
field->interval= field->save_interval;
field->save_interval= 0;
}
}
}
DBUG_RETURN(0);
err:
my_free((gptr) screen_buff,MYF(0));
my_free((gptr) keybuff, MYF(0));
err2:
VOID(my_close(file,MYF(MY_WME)));
err3:
my_delete(file_name,MYF(0));
DBUG_RETURN(1);
} /* mysql_create_frm */
/*
Create a frm (table definition) file and the tables
SYNOPSIS
rea_create_table()
thd Thread handler
file_name Name of file (including database and .frm)
db Name of database
table Name of table
create_info create info parameters
create_fields Fields to create
keys number of keys to create
key_info Keys to create
db_file Handler to use. May be zero, in which case we use
create_info->db_type
RETURN
0 ok
1 error
*/
int rea_create_table(THD *thd, my_string file_name,
const char *db, const char *table,
HA_CREATE_INFO *create_info,
List<create_field> &create_fields,
uint keys, KEY *key_info)
{
DBUG_ENTER("rea_create_table");
if (mysql_create_frm(thd, file_name, db, table, create_info,
create_fields, keys, key_info, NULL))
DBUG_RETURN(1);
if (thd->variables.keep_files_on_create)
create_info->options|= HA_CREATE_KEEP_FILES;
if (!create_info->frm_only && ha_create_table(file_name,create_info,0))
{
my_delete(file_name,MYF(0));
DBUG_RETURN(1);
}
DBUG_RETURN(0);
} /* rea_create_table */
/* Pack screens to a screen for save in a form-file */
static uchar * pack_screens(List<create_field> &create_fields,
uint *info_length, uint *screens,
bool small_file)
{
reg1 uint i;
uint row,start_row,end_row,fields_on_screen;
uint length,cols;
uchar *info,*pos,*start_screen;
uint fields=create_fields.elements;
List_iterator<create_field> it(create_fields);
DBUG_ENTER("pack_screens");
start_row=4; end_row=22; cols=80; fields_on_screen=end_row+1-start_row;
*screens=(fields-1)/fields_on_screen+1;
length= (*screens) * (SC_INFO_LENGTH+ (cols>> 1)+4);
create_field *field;
while ((field=it++))
length+=(uint) strlen(field->field_name)+1+TE_INFO_LENGTH+cols/2;
if (!(info=(uchar*) my_malloc(length,MYF(MY_WME))))
DBUG_RETURN(0);
start_screen=0;
row=end_row;
pos=info;
it.rewind();
for (i=0 ; i < fields ; i++)
{
create_field *cfield=it++;
if (row++ == end_row)
{
if (i)
{
length=(uint) (pos-start_screen);
int2store(start_screen,length);
start_screen[2]=(uchar) (fields_on_screen+1);
start_screen[3]=(uchar) (fields_on_screen);
}
row=start_row;
start_screen=pos;
pos+=4;
pos[0]= (uchar) start_row-2; /* Header string */
pos[1]= (uchar) (cols >> 2);
pos[2]= (uchar) (cols >> 1) +1;
strfill((my_string) pos+3,(uint) (cols >> 1),' ');
pos+=(cols >> 1)+4;
}
length=(uint) strlen(cfield->field_name);
if (length > cols-3)
length=cols-3;
if (!small_file)
{
pos[0]=(uchar) row;
pos[1]=0;
pos[2]=(uchar) (length+1);
pos=(uchar*) strmake((char*) pos+3,cfield->field_name,length)+1;
}
cfield->row=(uint8) row;
cfield->col=(uint8) (length+1);
cfield->sc_length=(uint8) min(cfield->length,cols-(length+2));
}
length=(uint) (pos-start_screen);
int2store(start_screen,length);
start_screen[2]=(uchar) (row-start_row+2);
start_screen[3]=(uchar) (row-start_row+1);
*info_length=(uint) (pos-info);
DBUG_RETURN(info);
} /* pack_screens */
/* Pack keyinfo and keynames to keybuff for save in form-file. */
static uint pack_keys(uchar *keybuff, uint key_count, KEY *keyinfo,
ulong data_offset)
{
uint key_parts,length;
uchar *pos, *keyname_pos;
KEY *key,*end;
KEY_PART_INFO *key_part,*key_part_end;
DBUG_ENTER("pack_keys");
pos=keybuff+6;
key_parts=0;
for (key=keyinfo,end=keyinfo+key_count ; key != end ; key++)
{
int2store(pos, (key->flags ^ HA_NOSAME));
int2store(pos+2,key->key_length);
pos[4]= (uchar) key->key_parts;
pos[5]= (uchar) key->algorithm;
pos[6]=pos[7]=0; // For the future
pos+=8;
key_parts+=key->key_parts;
DBUG_PRINT("loop", ("flags: %d key_parts: %d at 0x%lx",
key->flags, key->key_parts,
(long) key->key_part));
for (key_part=key->key_part,key_part_end=key_part+key->key_parts ;
key_part != key_part_end ;
key_part++)
{
uint offset;
DBUG_PRINT("loop",("field: %d startpos: %lu length: %d",
key_part->fieldnr, key_part->offset + data_offset,
key_part->length));
int2store(pos,key_part->fieldnr+1+FIELD_NAME_USED);
offset= (uint) (key_part->offset+data_offset+1);
int2store(pos+2, offset);
pos[4]=0; // Sort order
int2store(pos+5,key_part->key_type);
int2store(pos+7,key_part->length);
pos+=9;
}
}
/* Save keynames */
keyname_pos=pos;
*pos++=(uchar) NAMES_SEP_CHAR;
for (key=keyinfo ; key != end ; key++)
{
uchar *tmp=(uchar*) strmov((char*) pos,key->name);
*tmp++= (uchar) NAMES_SEP_CHAR;
*tmp=0;
pos=tmp;
}
*(pos++)=0;
if (key_count > 127 || key_parts > 127)
{
keybuff[0]= (key_count & 0x7f) | 0x80;
keybuff[1]= key_count >> 7;
int2store(keybuff+2,key_parts);
}
else
{
keybuff[0]=(uchar) key_count;
keybuff[1]=(uchar) key_parts;
keybuff[2]= keybuff[3]= 0;
}
length=(uint) (pos-keyname_pos);
int2store(keybuff+4,length);
DBUG_RETURN((uint) (pos-keybuff));
} /* pack_keys */
/* Make formheader */
static bool pack_header(uchar *forminfo, enum db_type table_type,
List<create_field> &create_fields,
uint info_length, uint screens, uint table_options,
ulong data_offset, handler *file)
{
uint length,int_count,int_length,no_empty, int_parts;
uint time_stamp_pos,null_fields;
ulong reclength, totlength, n_length, com_length;
DBUG_ENTER("pack_header");
if (create_fields.elements > MAX_FIELDS)
{
my_message(ER_TOO_MANY_FIELDS, ER(ER_TOO_MANY_FIELDS), MYF(0));
DBUG_RETURN(1);
}
totlength= 0L;
reclength= data_offset;
no_empty=int_count=int_parts=int_length=time_stamp_pos=null_fields=
com_length=0;
n_length=2L;
/* Check fields */
List_iterator<create_field> it(create_fields);
create_field *field;
while ((field=it++))
{
uint tmp_len= system_charset_info->cset->charpos(system_charset_info,
field->comment.str,
field->comment.str +
field->comment.length,
255);
if (tmp_len < field->comment.length)
{
char buff[128];
(void) my_snprintf(buff,sizeof(buff), "Too long comment for field '%s'",
field->field_name);
if ((current_thd->variables.sql_mode &
(MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES)))
{
my_message(ER_UNKNOWN_ERROR, buff, MYF(0));
DBUG_RETURN(1);
}
push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_UNKNOWN_ERROR, ER(ER_UNKNOWN_ERROR), buff);
field->comment.length= tmp_len;
}
totlength+= field->length;
com_length+= field->comment.length;
if (MTYP_TYPENR(field->unireg_check) == Field::NOEMPTY ||
field->unireg_check & MTYP_NOEMPTY_BIT)
{
field->unireg_check= (Field::utype) ((uint) field->unireg_check |
MTYP_NOEMPTY_BIT);
no_empty++;
}
/*
We mark first TIMESTAMP field with NOW() in DEFAULT or ON UPDATE
as auto-update field.
*/
if (field->sql_type == FIELD_TYPE_TIMESTAMP &&
MTYP_TYPENR(field->unireg_check) != Field::NONE &&
!time_stamp_pos)
time_stamp_pos= (uint) field->offset+ (uint) data_offset + 1;
length=field->pack_length;
/* Ensure we don't have any bugs when generating offsets */
DBUG_ASSERT(reclength == field->offset + data_offset);
if ((uint) field->offset+ (uint) data_offset+ length > reclength)
reclength=(uint) (field->offset+ data_offset + length);
n_length+= (ulong) strlen(field->field_name)+1;
field->interval_id=0;
field->save_interval= 0;
if (field->interval)
{
uint old_int_count=int_count;
if (field->charset->mbminlen > 1)
{
/*
Escape UCS2 intervals using HEX notation to avoid
problems with delimiters between enum elements.
As the original representation is still needed in
the function make_empty_rec to create a record of
filled with default values it is saved in save_interval
The HEX representation is created from this copy.
*/
field->save_interval= field->interval;
field->interval= (TYPELIB*) sql_alloc(sizeof(TYPELIB));
*field->interval= *field->save_interval;
field->interval->type_names=
(const char **) sql_alloc(sizeof(char*) *
(field->interval->count+1));
field->interval->type_names[field->interval->count]= 0;
field->interval->type_lengths=
(uint *) sql_alloc(sizeof(uint) * field->interval->count);
for (uint pos= 0; pos < field->interval->count; pos++)
{
char *dst;
const char *src= field->save_interval->type_names[pos];
uint hex_length;
length= field->save_interval->type_lengths[pos];
hex_length= length * 2;
field->interval->type_lengths[pos]= hex_length;
field->interval->type_names[pos]= dst= sql_alloc(hex_length + 1);
octet2hex(dst, src, length);
}
}
field->interval_id=get_interval_id(&int_count,create_fields,field);
if (old_int_count != int_count)
{
for (const char **pos=field->interval->type_names ; *pos ; pos++)
int_length+=(uint) strlen(*pos)+1; // field + suffix prefix
int_parts+=field->interval->count+1;
}
}
if (f_maybe_null(field->pack_flag))
null_fields++;
}
int_length+=int_count*2; // 255 prefix + 0 suffix
/* Save values in forminfo */
if (reclength > (ulong) file->max_record_length())
{
my_error(ER_TOO_BIG_ROWSIZE, MYF(0), (uint) file->max_record_length());
DBUG_RETURN(1);
}
/* Hack to avoid bugs with small static rows in MySQL */
reclength=max(file->min_record_length(table_options),reclength);
if (info_length+(ulong) create_fields.elements*FCOMP+288+
n_length+int_length+com_length > 65535L || int_count > 255)
{
my_message(ER_TOO_MANY_FIELDS, ER(ER_TOO_MANY_FIELDS), MYF(0));
DBUG_RETURN(1);
}
bzero((char*)forminfo,288);
length=(info_length+create_fields.elements*FCOMP+288+n_length+int_length+
com_length);
int2store(forminfo,length);
forminfo[256] = (uint8) screens;
int2store(forminfo+258,create_fields.elements);
int2store(forminfo+260,info_length);
int2store(forminfo+262,totlength);
int2store(forminfo+264,no_empty);
int2store(forminfo+266,reclength);
int2store(forminfo+268,n_length);
int2store(forminfo+270,int_count);
int2store(forminfo+272,int_parts);
int2store(forminfo+274,int_length);
int2store(forminfo+276,time_stamp_pos);
int2store(forminfo+278,80); /* Columns needed */
int2store(forminfo+280,22); /* Rows needed */
int2store(forminfo+282,null_fields);
int2store(forminfo+284,com_length);
/* Up to forminfo+288 is free to use for additional information */
DBUG_RETURN(0);
} /* pack_header */
/* get each unique interval each own id */
static uint get_interval_id(uint *int_count,List<create_field> &create_fields,
create_field *last_field)
{
List_iterator<create_field> it(create_fields);
create_field *field;
TYPELIB *interval=last_field->interval;
while ((field=it++) != last_field)
{
if (field->interval_id && field->interval->count == interval->count)
{
const char **a,**b;
for (a=field->interval->type_names, b=interval->type_names ;
*a && !strcmp(*a,*b);
a++,b++) ;
if (! *a)
{
return field->interval_id; // Re-use last interval
}
}
}
return ++*int_count; // New unique interval
}
/* Save fields, fieldnames and intervals */
static bool pack_fields(File file, List<create_field> &create_fields,
ulong data_offset)
{
reg2 uint i;
uint int_count, comment_length=0;
uchar buff[MAX_FIELD_WIDTH];
create_field *field;
DBUG_ENTER("pack_fields");
/* Write field info */
List_iterator<create_field> it(create_fields);
int_count=0;
while ((field=it++))
{
uint recpos;
buff[0]= (uchar) field->row;
buff[1]= (uchar) field->col;
buff[2]= (uchar) field->sc_length;
int2store(buff+3, field->length);
/* The +1 is here becasue the col offset in .frm file have offset 1 */
recpos= field->offset+1 + (uint) data_offset;
int3store(buff+5,recpos);
int2store(buff+8,field->pack_flag);
int2store(buff+10,field->unireg_check);
buff[12]= (uchar) field->interval_id;
buff[13]= (uchar) field->sql_type;
if (field->sql_type == FIELD_TYPE_GEOMETRY)
{
buff[14]= (uchar) field->geom_type;
#ifndef HAVE_SPATIAL
DBUG_ASSERT(0); // Should newer happen
#endif
}
else if (field->charset)
buff[14]= (uchar) field->charset->number;
else
buff[14]= 0; // Numerical
int2store(buff+15, field->comment.length);
comment_length+= field->comment.length;
set_if_bigger(int_count,field->interval_id);
if (my_write(file,(byte*) buff,FCOMP,MYF_RW))
DBUG_RETURN(1);
}
/* Write fieldnames */
buff[0]=(uchar) NAMES_SEP_CHAR;
if (my_write(file,(byte*) buff,1,MYF_RW))
DBUG_RETURN(1);
i=0;
it.rewind();
while ((field=it++))
{
char *pos= strmov((char*) buff,field->field_name);
*pos++=NAMES_SEP_CHAR;
if (i == create_fields.elements-1)
*pos++=0;
if (my_write(file,(byte*) buff,(uint) (pos-(char*) buff),MYF_RW))
DBUG_RETURN(1);
i++;
}
/* Write intervals */
if (int_count)
{
String tmp((char*) buff,sizeof(buff), &my_charset_bin);
tmp.length(0);
it.rewind();
int_count=0;
while ((field=it++))
{
if (field->interval_id > int_count)
{
unsigned char sep= 0;
unsigned char occ[256];
uint i;
unsigned char *val= NULL;
bzero(occ, sizeof(occ));
for (i=0; (val= (unsigned char*) field->interval->type_names[i]); i++)
for (uint j = 0; j < field->interval->type_lengths[i]; j++)
occ[(unsigned int) (val[j])]= 1;
if (!occ[(unsigned char)NAMES_SEP_CHAR])
sep= (unsigned char) NAMES_SEP_CHAR;
else if (!occ[(unsigned int)','])
sep= ',';
else
{
for (uint i=1; i<256; i++)
{
if(!occ[i])
{
sep= i;
break;
}
}
if(!sep) /* disaster, enum uses all characters, none left as separator */
{
my_message(ER_WRONG_FIELD_TERMINATORS,ER(ER_WRONG_FIELD_TERMINATORS),
MYF(0));
DBUG_RETURN(1);
}
}
int_count= field->interval_id;
tmp.append(sep);
for (const char **pos=field->interval->type_names ; *pos ; pos++)
{
tmp.append(*pos);
tmp.append(sep);
}
tmp.append('\0'); // End of intervall
}
}
if (my_write(file,(byte*) tmp.ptr(),tmp.length(),MYF_RW))
DBUG_RETURN(1);
}
if (comment_length)
{
it.rewind();
int_count=0;
while ((field=it++))
{
if (field->comment.length)
if (my_write(file, (byte*) field->comment.str, field->comment.length,
MYF_RW))
DBUG_RETURN(1);
}
}
DBUG_RETURN(0);
}
/* save an empty record on start of formfile */
static bool make_empty_rec(THD *thd, File file,enum db_type table_type,
uint table_options,
List<create_field> &create_fields,
uint reclength,
ulong data_offset)
{
int error;
Field::utype type;
uint null_count;
uchar *buff,*null_pos;
TABLE table;
create_field *field;
handler *handler;
enum_check_fields old_count_cuted_fields= thd->count_cuted_fields;
DBUG_ENTER("make_empty_rec");
/* We need a table to generate columns for default values */
bzero((char*) &table,sizeof(table));
table.s= &table.share_not_to_be_used;
handler= get_new_handler((TABLE*) 0, thd->mem_root, table_type);
if (!handler ||
!(buff=(uchar*) my_malloc((uint) reclength,MYF(MY_WME | MY_ZEROFILL))))
{
delete handler;
DBUG_RETURN(1);
}
table.in_use= thd;
table.s->db_low_byte_first= handler->low_byte_first();
table.s->blob_ptr_size= portable_sizeof_char_ptr;
null_count=0;
if (!(table_options & HA_OPTION_PACK_RECORD))
{
null_count++; // Need one bit for delete mark
*buff|= 1;
}
null_pos= buff;
List_iterator<create_field> it(create_fields);
thd->count_cuted_fields= CHECK_FIELD_WARN; // To find wrong default values
while ((field=it++))
{
/*
regfield don't have to be deleted as it's allocated with sql_alloc()
*/
Field *regfield=make_field((char*) buff+field->offset + data_offset,
field->length,
null_pos + null_count / 8,
null_count & 7,
field->pack_flag,
field->sql_type,
field->charset,
field->geom_type,
field->unireg_check,
field->save_interval ? field->save_interval :
field->interval,
field->field_name,
&table);
if (!regfield)
{
error= 1;
goto err; // End of memory
}
if (!(field->flags & NOT_NULL_FLAG))
{
*regfield->null_ptr|= regfield->null_bit;
null_count++;
}
if (field->sql_type == FIELD_TYPE_BIT && !f_bit_as_char(field->pack_flag))
null_count+= field->length & 7;
type= (Field::utype) MTYP_TYPENR(field->unireg_check);
if (field->def &&
(regfield->real_type() != FIELD_TYPE_YEAR ||
field->def->val_int() != 0))
{
int res= field->def->save_in_field(regfield, 1);
/* If not ok or warning of level 'note' */
if (res != 0 && res != 3)
{
my_error(ER_INVALID_DEFAULT, MYF(0), regfield->field_name);
error= 1;
goto err;
}
}
else if (regfield->real_type() == FIELD_TYPE_ENUM &&
(field->flags & NOT_NULL_FLAG))
{
regfield->set_notnull();
regfield->store((longlong) 1, TRUE);
}
else if (type == Field::YES) // Old unireg type
regfield->store(ER(ER_YES),(uint) strlen(ER(ER_YES)),system_charset_info);
else if (type == Field::NO) // Old unireg type
regfield->store(ER(ER_NO), (uint) strlen(ER(ER_NO)),system_charset_info);
else
regfield->reset();
}
DBUG_ASSERT(data_offset == ((null_count + 7) / 8));
/*
We need to set the unused bits to 1. If the number of bits is a multiple
of 8 there are no unused bits.
*/
if (null_count & 7)
*(null_pos + null_count / 8)|= ~(((uchar) 1 << (null_count & 7)) - 1);
error=(int) my_write(file,(byte*) buff, (uint) reclength,MYF_RW);
err:
my_free((gptr) buff,MYF(MY_FAE));
delete handler;
thd->count_cuted_fields= old_count_cuted_fields;
DBUG_RETURN(error);
} /* make_empty_rec */
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