/* 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. */ #include "mysql_priv.h" #include "create_options.h" #include #include #define FCOMP 17 /* Bytes for a packed field */ /* threshold for safe_alloca */ #define ALLOCA_THRESHOLD 2048 static uchar * pack_screens(List &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 legacy_db_type table_type, List &create_fields, uint info_length, uint screens, uint table_options, ulong data_offset, handler *file); static uint get_interval_id(uint *,List &, Create_field *); static bool pack_fields(File file, List &create_fields, ulong data_offset); static bool make_empty_rec(THD *thd, int file, enum legacy_db_type table_type, uint table_options, List &create_fields, uint reclength, ulong data_offset, handler *handler); /** An interceptor to hijack ER_TOO_MANY_FIELDS error from pack_screens and retry again without UNIREG screens. XXX: what is a UNIREG screen? */ struct Pack_header_error_handler: public Internal_error_handler { virtual bool handle_error(uint sql_errno, const char *message, MYSQL_ERROR::enum_warning_level level, THD *thd); bool is_handled; Pack_header_error_handler() :is_handled(FALSE) {} }; bool Pack_header_error_handler:: handle_error(uint sql_errno, const char * /* message */, MYSQL_ERROR::enum_warning_level /* level */, THD * /* thd */) { is_handled= (sql_errno == ER_TOO_MANY_FIELDS); return is_handled; } /* Create a frm (table definition) file SYNOPSIS mysql_create_frm() thd Thread handler file_name Path for 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 false ok true error */ bool mysql_create_frm(THD *thd, const char *file_name, const char *db, const char *table, HA_CREATE_INFO *create_info, List &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, i; ulong key_buff_length; File file; ulong filepos, data_offset; uint options_len; uchar fileinfo[64],forminfo[288],*keybuff; uchar *screen_buff; char buff[128]; #ifdef WITH_PARTITION_STORAGE_ENGINE partition_info *part_info= thd->work_part_info; #endif Pack_header_error_handler pack_header_error_handler; int error; DBUG_ENTER("mysql_create_frm"); DBUG_ASSERT(*fn_rext((char*)file_name)); // Check .frm extension if (!(screen_buff=pack_screens(create_fields,&info_length,&screens,0))) DBUG_RETURN(1); DBUG_ASSERT(db_file != NULL); /* 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; thd->push_internal_handler(&pack_header_error_handler); error= pack_header(forminfo, ha_legacy_type(create_info->db_type), create_fields,info_length, screens, create_info->table_options, data_offset, db_file); thd->pop_internal_handler(); if (error) { my_free(screen_buff, MYF(0)); if (! pack_header_error_handler.is_handled) DBUG_RETURN(1); // Try again without UNIREG screens (to get more columns) if (!(screen_buff=pack_screens(create_fields,&info_length,&screens,1))) DBUG_RETURN(1); if (pack_header(forminfo, ha_legacy_type(create_info->db_type), create_fields,info_length, screens, create_info->table_options, data_offset, db_file)) { my_free(screen_buff, MYF(0)); DBUG_RETURN(1); } } reclength=uint2korr(forminfo+266); /* Calculate extra data segment length */ str_db_type= *hton_name(create_info->db_type); /* str_db_type */ create_info->extra_size= (2 + str_db_type.length + 2 + create_info->connect_string.length); /* Partition: Length of partition info = 4 byte Potential NULL byte at end of partition info string = 1 byte Indicator if auto-partitioned table = 1 byte => Total 6 byte */ create_info->extra_size+= 6; #ifdef WITH_PARTITION_STORAGE_ENGINE if (part_info) { create_info->extra_size+= part_info->part_info_len; } #endif for (i= 0; i < keys; i++) { if (key_info[i].parser_name) create_info->extra_size+= key_info[i].parser_name->length + 1; } options_len= engine_table_options_frm_length(create_info->option_list, create_fields, keys, key_info); DBUG_PRINT("info", ("Options length: %u", options_len)); if (options_len) { create_info->table_options|= HA_OPTION_TEXT_CREATE_OPTIONS; create_info->extra_size+= (options_len + 4); } else create_info->table_options&= ~HA_OPTION_TEXT_CREATE_OPTIONS; if ((file=create_frm(thd, file_name, db, table, reclength, fileinfo, create_info, keys)) < 0) { my_free(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); /* Ensure that there are no forms in this newly created form file. Even if the form file exists, create_frm must truncate it to ensure one form per form file. */ DBUG_ASSERT(uint2korr(fileinfo+8) == 0); if (!(filepos= make_new_entry(file, fileinfo, NULL, ""))) 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); /* This gives us the byte-position of the character at (character-position, not byte-position) TABLE_COMMENT_MAXLEN. The trick here is that character-positions start at 0, so the last character in a maximum-allowed length string would be at char-pos MAXLEN-1; charpos MAXLEN will be the position of the terminator. Consequently, bytepos(charpos(MAXLEN)) should be equal to comment[length] (which should also be the terminator, or at least the first byte after the payload in the strict sense). If this is not so (bytepos(charpos(MAXLEN)) comes /before/ the end of the string), the string is too long. For additional credit, realise that UTF-8 has 1-3 bytes before 6.0, and 1-4 bytes in 6.0 (6.0 also has UTF-32). This means that the inlined COMMENT supposedly does not exceed 60 character plus terminator, vulgo, 181 bytes. */ 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) { if ((thd->variables.sql_mode & (MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES))) { my_error(ER_TOO_LONG_TABLE_COMMENT, MYF(0), table, tmp_len); goto err; } push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_TOO_LONG_TABLE_COMMENT, ER(ER_TOO_LONG_TABLE_COMMENT), table, tmp_len); 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; #ifdef WITH_PARTITION_STORAGE_ENGINE if (part_info) { fileinfo[61]= (uchar) ha_legacy_type(part_info->default_engine_type); DBUG_PRINT("info", ("part_db_type = %d", fileinfo[61])); } #endif int2store(fileinfo+59,db_file->extra_rec_buf_length()); if (my_pwrite(file, fileinfo, 64, 0L, MYF_RW) || my_pwrite(file, 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,ha_legacy_type(create_info->db_type), create_info->table_options, create_fields,reclength, data_offset, db_file)) goto err; int2store(buff, create_info->connect_string.length); if (my_write(file, (const uchar*)buff, 2, MYF(MY_NABP)) || my_write(file, (const uchar*)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 uchar*)buff, 2, MYF(MY_NABP)) || my_write(file, (const uchar*)str_db_type.str, str_db_type.length, MYF(MY_NABP))) goto err; #ifdef WITH_PARTITION_STORAGE_ENGINE if (part_info) { char auto_partitioned= part_info->is_auto_partitioned ? 1 : 0; int4store(buff, part_info->part_info_len); if (my_write(file, (const uchar*)buff, 4, MYF_RW) || my_write(file, (const uchar*)part_info->part_info_string, part_info->part_info_len + 1, MYF_RW) || my_write(file, (const uchar*)&auto_partitioned, 1, MYF_RW)) goto err; } else #endif { bzero((uchar*) buff, 6); if (my_write(file, (uchar*) buff, 6, MYF_RW)) goto err; } for (i= 0; i < keys; i++) { if (key_info[i].parser_name) { if (my_write(file, (const uchar*)key_info[i].parser_name->str, key_info[i].parser_name->length + 1, MYF(MY_NABP))) goto err; } } if (options_len) { uchar *optbuff= (uchar *)my_safe_alloca(options_len + 4, ALLOCA_THRESHOLD); my_bool error; DBUG_PRINT("info", ("Create options length: %u", options_len)); if (!optbuff) goto err; int4store(optbuff, options_len); engine_table_options_frm_image(optbuff + 4, create_info->option_list, create_fields, keys, key_info); error= my_write(file, optbuff, options_len + 4, MYF_RW); my_safe_afree(optbuff, options_len + 4, ALLOCA_THRESHOLD); if (error) goto err; } VOID(my_seek(file,filepos,MY_SEEK_SET,MYF(0))); if (my_write(file, forminfo, 288, MYF_RW) || my_write(file, 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,(uchar**) &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(screen_buff,MYF(0)); my_free(keybuff, MYF(0)); if (opt_sync_frm && !(create_info->options & HA_LEX_CREATE_TMP_TABLE) && (my_sync(file, MYF(MY_WME)) || my_sync_dir_by_file(file_name, 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 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(screen_buff, MYF(0)); my_free(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 path Name of file (including database, without .frm) db Data base name table_name Table name create_info create info parameters create_fields Fields to create keys number of keys to create key_info Keys to create file Handler to use RETURN 0 ok 1 error */ int rea_create_table(THD *thd, const char *path, const char *db, const char *table_name, HA_CREATE_INFO *create_info, List &create_fields, uint keys, KEY *key_info, handler *file) { DBUG_ENTER("rea_create_table"); char frm_name[FN_REFLEN]; strxmov(frm_name, path, reg_ext, NullS); if (mysql_create_frm(thd, frm_name, db, table_name, create_info, create_fields, keys, key_info, file)) DBUG_RETURN(1); // Make sure mysql_create_frm din't remove extension DBUG_ASSERT(*fn_rext(frm_name)); if (thd->variables.keep_files_on_create) create_info->options|= HA_CREATE_KEEP_FILES; if (!create_info->frm_only && (file->ha_create_handler_files(path, NULL, CHF_CREATE_FLAG, create_info) || ha_create_table(thd, path, db, table_name, create_info, 0))) goto err_handler; DBUG_RETURN(0); err_handler: VOID(file->ha_create_handler_files(path, NULL, CHF_DELETE_FLAG, create_info)); my_delete(frm_name, MYF(0)); DBUG_RETURN(1); } /* rea_create_table */ /* Pack screens to a screen for save in a form-file */ static uchar *pack_screens(List &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 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((char *) 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; int2store(pos+6, key->block_size); pos+=8; key_parts+=key->key_parts; DBUG_PRINT("loop", ("flags: %lu key_parts: %d key_part: 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 legacy_db_type table_type, List &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, vcol_info_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=0; com_length=vcol_info_length=0; n_length=2L; /* Check fields */ List_iterator 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) { if ((current_thd->variables.sql_mode & (MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES))) { my_error(ER_TOO_LONG_FIELD_COMMENT, MYF(0), field->field_name, tmp_len); DBUG_RETURN(1); } push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_TOO_LONG_FIELD_COMMENT, ER(ER_TOO_LONG_FIELD_COMMENT), field->field_name, tmp_len); field->comment.length= tmp_len; } if (field->vcol_info) { tmp_len= system_charset_info->cset->charpos(system_charset_info, field->vcol_info->expr_str.str, field->vcol_info->expr_str.str + field->vcol_info->expr_str.length, VIRTUAL_COLUMN_EXPRESSION_MAXLEN); if (tmp_len < field->vcol_info->expr_str.length) { my_error(ER_WRONG_STRING_LENGTH, MYF(0), field->vcol_info->expr_str.str,"VIRTUAL COLUMN EXPRESSION", (uint) VIRTUAL_COLUMN_EXPRESSION_MAXLEN); DBUG_RETURN(1); } /* Sum up the length of the expression string and the length of the mandatory header to the total length of info on the defining expressions saved in the frm file for virtual columns. */ vcol_info_length+= field->vcol_info->expr_str.length+ (uint)FRM_VCOL_HEADER_SIZE; } 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 == MYSQL_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; 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= (char*) 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+vcol_info_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+vcol_info_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); int2store(forminfo+286,vcol_info_length); /* 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_fields, Create_field *last_field) { List_iterator 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_fields, ulong data_offset) { reg2 uint i; uint int_count, comment_length= 0, vcol_info_length=0; uchar buff[MAX_FIELD_WIDTH]; Create_field *field; DBUG_ENTER("pack_fields"); /* Write field info */ List_iterator it(create_fields); int_count=0; while ((field=it++)) { uint recpos; uint cur_vcol_expr_len= 0; 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 == MYSQL_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 if (field->vcol_info) { /* Use the interval_id place in the .frm file to store the length of the additional data saved for the virtual field */ buff[12]= cur_vcol_expr_len= field->vcol_info->expr_str.length + (uint)FRM_VCOL_HEADER_SIZE; vcol_info_length+= cur_vcol_expr_len+(uint)FRM_VCOL_HEADER_SIZE; buff[13]= (uchar) MYSQL_TYPE_VIRTUAL; } int2store(buff+15, field->comment.length); comment_length+= field->comment.length; set_if_bigger(int_count,field->interval_id); if (my_write(file, buff, FCOMP, MYF_RW)) DBUG_RETURN(1); } /* Write fieldnames */ buff[0]=(uchar) NAMES_SEP_CHAR; if (my_write(file, 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, buff, (size_t) (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,(uchar*) 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, (uchar*) field->comment.str, field->comment.length, MYF_RW)) DBUG_RETURN(1); } } if (vcol_info_length) { it.rewind(); int_count=0; while ((field=it++)) { /* Pack each virtual field as follows: byte 1 = 1 (always 1 to allow for future extensions) byte 2 = sql_type byte 3 = flags (as of now, 0 - no flags, 1 - field is physically stored) byte 4-... = virtual column expression (text data) */ if (field->vcol_info && field->vcol_info->expr_str.length) { buff[0]= (uchar)1; buff[1]= (uchar) field->sql_type; buff[2]= (uchar) field->stored_in_db; if (my_write(file, buff, 3, MYF_RW)) DBUG_RETURN(1); if (my_write(file, (uchar*) field->vcol_info->expr_str.str, field->vcol_info->expr_str.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 legacy_db_type table_type, uint table_options, List &create_fields, uint reclength, ulong data_offset, handler *handler) { int error= 0; Field::utype type; uint null_count; uchar *buff,*null_pos; TABLE table; TABLE_SHARE share; Create_field *field; 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)); bzero((char*) &share, sizeof(share)); table.s= &share; if (!(buff=(uchar*) my_malloc((size_t) reclength,MYF(MY_WME | MY_ZEROFILL)))) { 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 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(&share, 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); if (!regfield) { error= 1; goto err; // End of memory } /* save_in_field() will access regfield->table->in_use */ regfield->init(&table); if (!(field->flags & NOT_NULL_FLAG)) { *regfield->null_ptr|= regfield->null_bit; null_count++; } if (field->sql_type == MYSQL_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) { 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; delete regfield; //To avoid memory leak goto err; } } else if (regfield->real_type() == MYSQL_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= my_write(file, buff, (size_t) reclength,MYF_RW) != 0; err: my_free(buff, MYF(MY_FAE)); thd->count_cuted_fields= old_count_cuted_fields; DBUG_RETURN(error); } /* make_empty_rec */