/* Copyright (C) 2004 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; 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 */ #include "mysql_priv.h" #include "sql_acl.h" #include "sql_select.h" #include "parse_file.h" #include "sp.h" static int mysql_register_view(THD *thd, TABLE_LIST *view, enum_view_create_mode mode); const char *sql_updatable_view_key_names[]= { "NO", "YES", "LIMIT1", NullS }; TYPELIB sql_updatable_view_key_typelib= { array_elements(sql_updatable_view_key_names)-1, "", sql_updatable_view_key_names }; /* Creating/altering VIEW procedure SYNOPSIS mysql_create_view() thd - thread handler mode - VIEW_CREATE_NEW, VIEW_ALTER, VIEW_CREATE_OR_REPLACE RETURN VALUE 0 OK -1 Error 1 Error and error message given */ int mysql_create_view(THD *thd, enum_view_create_mode mode) { LEX *lex= thd->lex; bool link_to_local; /* first table in list is target VIEW name => cut off it */ TABLE_LIST *view= lex->unlink_first_table(&link_to_local); TABLE_LIST *tables= lex->query_tables; TABLE_LIST *tbl; SELECT_LEX *select_lex= &lex->select_lex; SELECT_LEX_UNIT *unit= &lex->unit; int res= 0; DBUG_ENTER("mysql_create_view"); if (lex->derived_tables || lex->proc_list.first || lex->variables_used || lex->param_list.elements) { my_error((lex->derived_tables ? ER_VIEW_SELECT_DERIVED : (lex->proc_list.first ? ER_VIEW_SELECT_PROCEDURE : ER_VIEW_SELECT_VARIABLE)), MYF(0)); res= -1; goto err; } #ifndef NO_EMBEDDED_ACCESS_CHECKS if (check_access(thd, CREATE_VIEW_ACL, view->db, &view->grant.privilege, 0, 0) || grant_option && check_grant(thd, CREATE_VIEW_ACL, view, 0, 1, 0)) DBUG_RETURN(1); for (tbl= tables; tbl; tbl= tbl->next_local) { /* Ensure that we have some privilage on this table, more strict check will be done on column level after preparation, SELECT_ACL will be checked for sure for all fields because it is listed first (if we have not rights to SELECT from whole table this right will be written as tbl->grant.want_privilege and will be checked later (except fields which need any privilege and can be updated). */ if ((check_access(thd, SELECT_ACL, tbl->db, &tbl->grant.privilege, 0, 1) || grant_option && check_grant(thd, SELECT_ACL, tbl, 0, 1, 1)) && (check_access(thd, INSERT_ACL, tbl->db, &tbl->grant.privilege, 0, 1) || grant_option && check_grant(thd, INSERT_ACL, tbl, 0, 1, 1)) && (check_access(thd, DELETE_ACL, tbl->db, &tbl->grant.privilege, 0, 1) || grant_option && check_grant(thd, DELETE_ACL, tbl, 0, 1, 1)) && (check_access(thd, UPDATE_ACL, tbl->db, &tbl->grant.privilege, 0, 1) || grant_option && check_grant(thd, UPDATE_ACL, tbl, 0, 1, 1)) ) { my_printf_error(ER_TABLEACCESS_DENIED_ERROR, ER(ER_TABLEACCESS_DENIED_ERROR), MYF(0), "ANY", thd->priv_user, thd->host_or_ip, tbl->real_name); DBUG_RETURN(-1); } /* mark this table as table which will be checked after preparation */ tbl->table_in_first_from_clause= 1; /* We need to check only SELECT_ACL for all normal fields, fields where we need any privilege will be pmarked later */ tbl->grant.want_privilege= SELECT_ACL; /* Make sure that all rights are loaded to table 'grant' field. tbl->real_name will be correct name of table because VIEWs are not opened yet. */ fill_effective_table_privileges(thd, &tbl->grant, tbl->db, tbl->real_name); } if (&lex->select_lex != lex->all_selects_list) { /* check tables of subqueries */ for (tbl= tables; tbl; tbl= tbl->next_global) { if (!tbl->table_in_first_from_clause) { if (check_access(thd, SELECT_ACL, tbl->db, &tbl->grant.privilege, 0, 0) || grant_option && check_grant(thd, SELECT_ACL, tbl, 0, 1, 0)) { res= 1; goto err; } } } } /* Mark fields for special privilege check (any privilege) 'if' should be changed if we made updateable UNION. */ if (lex->select_lex.next_select() == 0) { List_iterator_fast it(lex->select_lex.item_list); Item *item; while ((item= it++)) { if (item->type() == Item::FIELD_ITEM) ((Item_field *)item)->any_privileges= 1; } } #endif if ((res= open_and_lock_tables(thd, tables))) DBUG_RETURN(res); /* check that tables are not temporary */ for (tbl= tables; tbl; tbl= tbl->next_global) { if (tbl->table->tmp_table != NO_TMP_TABLE && !test(tbl->view)) { my_error(ER_VIEW_SELECT_TMPTABLE, MYF(0), tbl->alias); res= -1; goto err; } /* Copy privileges of underlaying VIEWs which was filled by fill_effective_table_privileges (they was not copied in derived tables processing) */ tbl->table->grant.privilege= tbl->grant.privilege; } // prepare select to resolve all fields lex->view_prepare_mode= 1; if ((res= unit->prepare(thd, 0, 0))) goto err; /* view list (list of view fields names) */ if (lex->view_list.elements) { if (lex->view_list.elements != select_lex->item_list.elements) { my_message(ER_VIEW_WRONG_LIST, ER(ER_VIEW_WRONG_LIST), MYF(0)); goto err; } List_iterator_fast it(select_lex->item_list); List_iterator_fast nm(lex->view_list); Item *item; LEX_STRING *name; while((item= it++, name= nm++)) { item->set_name(name->str, name->length, system_charset_info); } } /* Test absence of duplicates names */ { Item *item; List_iterator_fast it(select_lex->item_list); it++; while((item= it++)) { Item *check; List_iterator_fast itc(select_lex->item_list); while((check= itc++) && check != item) { if (strcmp(item->name, check->name) == 0) { my_error(ER_DUP_FIELDNAME, MYF(0), item->name); DBUG_RETURN(-1); } } } } #ifndef NO_EMBEDDED_ACCESS_CHECKS /* Compare/check grants on view with grants of underlaying tables */ { char *db= view->db ? view->db : thd->db; List_iterator_fast it(select_lex->item_list); Item *item; fill_effective_table_privileges(thd, &view->grant, db, view->real_name); while((item= it++)) { uint priv= (get_column_grant(thd, &view->grant, db, view->real_name, item->name) & VIEW_ANY_ACL); if (item->type() == Item::FIELD_ITEM) { Item_field *fld= (Item_field *)item; /* There are no any privileges on VIWE column or there are some other privileges then we have for underlaying table */ if (priv == 0 || test(~fld->have_privileges & priv)) { /* VIEW column has more privileges */ my_printf_error(ER_COLUMNACCESS_DENIED_ERROR, ER(ER_COLUMNACCESS_DENIED_ERROR), MYF(0), "create view", thd->priv_user, thd->host_or_ip, item->name, view->real_name); DBUG_RETURN(-1); } } else { if (!test(priv & SELECT_ACL)) { /* user have not privilege to SELECT expression */ my_printf_error(ER_COLUMNACCESS_DENIED_ERROR, ER(ER_COLUMNACCESS_DENIED_ERROR), MYF(0), "select", thd->priv_user, thd->host_or_ip, item->name, view->real_name); DBUG_RETURN(-1); } } } } #endif if (wait_if_global_read_lock(thd, 0)) { VOID(pthread_mutex_unlock(&LOCK_open)); goto err; } VOID(pthread_mutex_lock(&LOCK_open)); if ((res= mysql_register_view(thd, view, mode))) { VOID(pthread_mutex_unlock(&LOCK_open)); start_waiting_global_read_lock(thd); goto err; } VOID(pthread_mutex_unlock(&LOCK_open)); start_waiting_global_read_lock(thd); send_ok(thd); lex->link_first_table_back(view, link_to_local); return 0; err: thd->proc_info= "end"; lex->link_first_table_back(view, link_to_local); unit->cleanup(); if (thd->net.report_error) res= -1; DBUG_RETURN(res); } // index of revision number in following table static const int revision_number_position= 4; static char *view_field_names[]= { (char*)"query", (char*)"md5", (char*)"updatable", (char*)"algorithm", (char*)"revision", (char*)"timestamp", (char*)"create-version", (char*)"source" }; // table of VIEW .frm field descriprors static File_option view_parameters[]= {{{view_field_names[0], 5}, offsetof(TABLE_LIST, query), FILE_OPTIONS_STRING}, {{view_field_names[1], 3}, offsetof(TABLE_LIST, md5), FILE_OPTIONS_STRING}, {{view_field_names[2], 9}, offsetof(TABLE_LIST, updatable), FILE_OPTIONS_ULONGLONG}, {{view_field_names[3], 9}, offsetof(TABLE_LIST, algorithm), FILE_OPTIONS_ULONGLONG}, {{view_field_names[4], 8}, offsetof(TABLE_LIST, revision), FILE_OPTIONS_REV}, {{view_field_names[5], 9}, offsetof(TABLE_LIST, timestamp), FILE_OPTIONS_TIMESTAMP}, {{view_field_names[6], 14}, offsetof(TABLE_LIST, file_version), FILE_OPTIONS_ULONGLONG}, {{view_field_names[7], 6}, offsetof(TABLE_LIST, source), FILE_OPTIONS_ESTRING}, {{NULL, 0}, 0, FILE_OPTIONS_STRING} }; static LEX_STRING view_file_type[]= {{(char*)"VIEW", 4}}; /* Register VIEW (write .frm & process .frm's history backups) SYNOPSIS mysql_register_view() thd - thread handler view - view description mode - VIEW_CREATE_NEW, VIEW_ALTER, VIEW_CREATE_OR_REPLACE RETURN 0 OK -1 Error 1 Error and error message given */ static int mysql_register_view(THD *thd, TABLE_LIST *view, enum_view_create_mode mode) { char buff[4096]; String str(buff,(uint32) sizeof(buff), system_charset_info); char md5[33]; bool can_be_merged; char dir_buff[FN_REFLEN], file_buff[FN_REFLEN]; LEX_STRING dir, file; DBUG_ENTER("mysql_register_view"); // print query str.length(0); { ulong sql_mode= thd->variables.sql_mode & MODE_ANSI_QUOTES; thd->variables.sql_mode&= ~MODE_ANSI_QUOTES; thd->lex->unit.print(&str); thd->variables.sql_mode|= sql_mode; } str.append('\0'); DBUG_PRINT("VIEW", ("View: %s", str.ptr())); // print file name (void) my_snprintf(dir_buff, FN_REFLEN, "%s/%s/", mysql_data_home, view->db); unpack_filename(dir_buff, dir_buff); dir.str= dir_buff; dir.length= strlen(dir_buff); file.str= file_buff; file.length= my_snprintf(file_buff, FN_REFLEN, "%s%s", view->real_name, reg_ext); /* init timestamp */ if (!test(view->timestamp.str)) view->timestamp.str= view->timestamp_buffer; // check old .frm { char path_buff[FN_REFLEN]; LEX_STRING path; path.str= path_buff; fn_format(path_buff, file.str, dir.str, 0, MY_UNPACK_FILENAME); path.length= strlen(path_buff); if (!access(path.str, F_OK)) { if (mode == VIEW_CREATE_NEW) { my_error(ER_TABLE_EXISTS_ERROR, MYF(0), view->alias); DBUG_RETURN(1); } File_parser *parser= sql_parse_prepare(&path, &thd->mem_root, 0); if (parser) { if(parser->ok() && !strncmp("VIEW", parser->type()->str, parser->type()->length)) { /* read revision number TODO: read dependense list, too, to process cascade/restrict TODO: special cascade/restrict procedure for alter? */ if (parser->parse((gptr)view, &thd->mem_root, view_parameters + revision_number_position, 1)) { DBUG_RETURN(1); } } else { my_error(ER_WRONG_OBJECT, MYF(0), (view->db?view->db:thd->db), view->real_name, "VIEW"); DBUG_RETURN(1); } } else { DBUG_RETURN(1); } } else { if (mode == VIEW_ALTER) { my_error(ER_NO_SUCH_TABLE, MYF(0), view->db, view->alias); DBUG_RETURN(1); } } } // fill structure view->query.str= (char*)str.ptr(); view->query.length= str.length()-1; // we do not need last \0 view->source.str= thd->query; view->source.length= thd->query_length; view->file_version= 1; view->calc_md5(md5); view->md5.str= md5; view->md5.length= 32; can_be_merged= thd->lex->can_be_merged(); if (thd->lex->create_view_algorithm == VIEW_ALGORITHM_MERGE && !thd->lex->can_be_merged()) { push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_VIEW_MERGE, ER(ER_WARN_VIEW_MERGE)); thd->lex->create_view_algorithm= VIEW_ALGORITHM_UNDEFINED; } view->algorithm= thd->lex->create_view_algorithm; if ((view->updatable= (can_be_merged && view->algorithm != VIEW_ALGORITHM_TMEPTABLE))) { // TODO: change here when we will support UNIONs for (TABLE_LIST *tbl= (TABLE_LIST *)thd->lex->select_lex.table_list.first; tbl; tbl= tbl->next_local) { if (tbl->view != 0 && !tbl->updatable) { view->updatable= 0; break; } } } if (sql_create_definition_file(&dir, &file, view_file_type, (gptr)view, view_parameters, 3)) { DBUG_RETURN(1); } DBUG_RETURN(0); } /* read VIEW .frm and create structures SYNOPSIS mysql_make_view() parser - parser object; table - TABLE_LIST structure for filling RETURN TRUE OK FALSE error */ my_bool mysql_make_view(File_parser *parser, TABLE_LIST *table) { DBUG_ENTER("mysql_make_view"); if (table->view) { DBUG_PRINT("info", ("VIEW %s.%s is already processed on previos PS/SP execution", table->view_db.str, table->view_name.str)); DBUG_RETURN(0); } TABLE_LIST *old_next, *tbl_end, *tbl_next; SELECT_LEX *end; THD *thd= current_thd; LEX *old_lex= thd->lex, *lex; int res= 0; /* For now we assume that tables will not be changed during PS life (it will be TRUE as far as we make new table cache). */ Item_arena *arena= thd->current_arena, backup; if (arena) thd->set_n_backup_item_arena(arena, &backup); /* init timestamp */ if (!test(table->timestamp.str)) table->timestamp.str= table->timestamp_buffer; /* TODO: when VIEWs will be stored in cache, table mem_root should be used here */ if (parser->parse((gptr)table, &thd->mem_root, view_parameters, 6)) goto err; /* Save VIEW parameters, which will be wiped out by derived table processing */ table->view_db.str= table->db; table->view_db.length= table->db_length; table->view_name.str= table->real_name; table->view_name.length= table->real_name_length; /*TODO: md5 test here and warning if it is differ */ /* TODO: TABLE mem root should be used here when VIEW will be stored in TABLE cache now Lex placed in statement memory */ table->view= lex= thd->lex= (LEX*) new(&thd->mem_root) st_lex_local; mysql_init_query(thd, (uchar*)table->query.str, table->query.length, TRUE); lex->select_lex.select_number= ++thd->select_number; old_lex->derived_tables|= DERIVED_VIEW; { ulong options= thd->options; /* switch off modes which can prevent normal parsing of VIEW - MODE_REAL_AS_FLOAT affect only CREATE TABLE parsing + MODE_PIPES_AS_CONCAT affect expression parsing + MODE_ANSI_QUOTES affect expression parsing + MODE_IGNORE_SPACE affect expression parsing - MODE_NOT_USED not used :) * MODE_ONLY_FULL_GROUP_BY affect execution * MODE_NO_UNSIGNED_SUBTRACTION affect execution - MODE_NO_DIR_IN_CREATE affect table creation only - MODE_POSTGRESQL compounded from other modes - MODE_ORACLE compounded from other modes - MODE_MSSQL compounded from other modes - MODE_DB2 compounded from other modes - MODE_MAXDB affect only CREATE TABLE parsing - MODE_NO_KEY_OPTIONS affect only SHOW - MODE_NO_TABLE_OPTIONS affect only SHOW - MODE_NO_FIELD_OPTIONS affect only SHOW - MODE_MYSQL323 affect only SHOW - MODE_MYSQL40 affect only SHOW - MODE_ANSI compounded from other modes (+ transaction mode) ? MODE_NO_AUTO_VALUE_ON_ZERO affect UPDATEs + MODE_NO_BACKSLASH_ESCAPES affect expression parsing */ thd->options&= ~(MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | MODE_IGNORE_SPACE | MODE_NO_BACKSLASH_ESCAPES); res= yyparse((void *)thd); thd->options= options; } if (!res && !thd->is_fatal_error) { TABLE_LIST *top_view= (table->belong_to_view ? table->belong_to_view : table); /* move SP to main LEX */ sp_merge_funs(old_lex, lex); if (lex->spfuns.array.buffer) hash_free(&lex->spfuns); old_next= table->next_global; if ((table->next_global= lex->query_tables)) table->next_global->prev_global= &table->next_global; /* mark to avoid temporary table using and put view reference*/ for (TABLE_LIST *tbl= table->next_global; tbl; tbl= tbl->next_global) { tbl->skip_temporary= 1; tbl->belong_to_view= top_view; } /* check rights to run commands (EXPLAIN SELECT & SHOW CREATE) which show underlaying tables */ if ((old_lex->sql_command == SQLCOM_SELECT && old_lex->describe) || old_lex->sql_command == SQLCOM_SHOW_CREATE) { if (check_table_access(thd, SELECT_ACL, table->next_global, 1) && check_table_access(thd, SHOW_VIEW_ACL, table->next_global, 1)) { my_error(ER_VIEW_NO_EXPLAIN, MYF(0)); goto err; } } /* move SQL_NO_CACHE & Co to whole query */ old_lex->safe_to_cache_query= (old_lex->safe_to_cache_query && lex->safe_to_cache_query); /* move SQL_CACHE to whole query */ if (lex->select_lex.options & OPTION_TO_QUERY_CACHE) old_lex->select_lex.options|= OPTION_TO_QUERY_CACHE; /* check MERGE algorithm ability - algorithm is not explicit TEMPORARY TABLE - VIEW SELECT allow marging - VIEW used in subquery or command support MERGE algorithm */ if (table->algorithm != VIEW_ALGORITHM_TMEPTABLE && lex->can_be_merged() && (table->select_lex->master_unit() != &old_lex->unit || old_lex->can_use_merged())) { /* TODO: support multi tables substitutions table->next_global should be the same as (TABLE_LIST *)lex->select_lex.table_list.first; */ TABLE_LIST *view_table= table->next_global; /* lex should contain at least one table */ DBUG_ASSERT(view_table != 0); table->effective_algorithm= VIEW_ALGORITHM_MERGE; if (old_next) { if ((view_table->next_global= old_next)) old_next->prev_global= &view_table->next_global; } table->ancestor= view_table; // next table should include SELECT_LEX under this table SELECT_LEX table->ancestor->select_lex= table->select_lex; /* move lock type (TODO: should we issue error in case of TMPTABLE algorithm and non-read locking)? */ view_table->lock_type= table->lock_type; /* Store WHERE clause for postprocessing in setup_ancestor */ table->where= lex->select_lex.where; /* This SELECT_LEX will be linked in global SELECT_LEX list to make it processed by mysql_handle_derived(), but it will not be included to SELECT_LEX tree, because it will not be executed */ goto ok; } table->effective_algorithm= VIEW_ALGORITHM_TMEPTABLE; lex->select_lex.linkage= DERIVED_TABLE_TYPE; if (table->updatable) { //TOTO: warning: can't be updateable, .frm edited by hand. version //downgrade? table->updatable= 0; } /* SELECT tree link */ lex->unit.include_down(table->select_lex); lex->unit.slave= &lex->select_lex; // fix include_down initialisation if (old_next) { if ((tbl_end= table->next_global)) { for (; (tbl_next= tbl_end->next_global); tbl_end= tbl_next); if ((tbl_end->next_global= old_next)) tbl_end->next_global->prev_global= &tbl_end->next_global; } else { /* VIEW do not contain tables */ table->next_global= old_next; } } table->derived= &lex->unit; } else goto err; ok: if (arena) thd->restore_backup_item_arena(arena, &backup); /* global SELECT list linking */ end= &lex->select_lex; // primary SELECT_LEX is always last end->link_next= old_lex->all_selects_list; old_lex->all_selects_list->link_prev= &end->link_next; old_lex->all_selects_list= lex->all_selects_list; lex->all_selects_list->link_prev= (st_select_lex_node**)&old_lex->all_selects_list; thd->lex= old_lex; DBUG_RETURN(0); err: if (arena) thd->restore_backup_item_arena(arena, &backup); table->view= 0; // now it is not VIEW placeholder thd->lex= old_lex; DBUG_RETURN(1); } /* drop view SYNOPSIS mysql_drop_view() thd - thread handler views - views to delete drop_mode - cascade/check RETURN VALUE 0 OK -1 Error 1 Error and error message given */ int mysql_drop_view(THD *thd, TABLE_LIST *views, enum_drop_mode drop_mode) { DBUG_ENTER("mysql_drop_view"); char path[FN_REFLEN]; TABLE_LIST *view; bool type= 0; for (view= views; view; view= view->next_local) { strxmov(path, mysql_data_home, "/", view->db, "/", view->real_name, reg_ext, NullS); (void) unpack_filename(path, path); VOID(pthread_mutex_lock(&LOCK_open)); if (access(path, F_OK) || (type= (mysql_frm_type(path) != FRMTYPE_VIEW))) { char name[FN_REFLEN]; my_snprintf(name, sizeof(name), "%s.%s", view->db, view->real_name); if (thd->lex->drop_if_exists) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_BAD_TABLE_ERROR, ER(ER_BAD_TABLE_ERROR), name); VOID(pthread_mutex_unlock(&LOCK_open)); continue; } if (type) my_error(ER_WRONG_OBJECT, MYF(0), view->db, view->real_name, "VIEW"); else my_error(ER_BAD_TABLE_ERROR, MYF(0), name); goto err; } if (my_delete(path, MYF(MY_WME))) goto err; VOID(pthread_mutex_unlock(&LOCK_open)); } send_ok(thd); DBUG_RETURN(0); err: VOID(pthread_mutex_unlock(&LOCK_open)); DBUG_RETURN(-1); } /* Check type of .frm if we are not going to parse it SYNOPSIS mysql_frm_type() path path to file RETURN FRMTYPE_ERROR error FRMTYPE_TABLE table FRMTYPE_VIEW view */ frm_type_enum mysql_frm_type(char *path) { File file; char header[10]; //"TYPE=VIEW\n" it is 10 characters DBUG_ENTER("mysql_frm_type"); if ((file= my_open(path, O_RDONLY | O_SHARE, MYF(MY_WME))) < 0) { DBUG_RETURN(FRMTYPE_ERROR); } if (my_read(file, (byte*) header, 10, MYF(MY_WME)) == MY_FILE_ERROR) { my_close(file, MYF(MY_WME)); DBUG_RETURN(FRMTYPE_ERROR); } my_close(file, MYF(MY_WME)); if (strncmp(header, "TYPE=VIEW\n", 10) != 0) DBUG_RETURN(FRMTYPE_TABLE); DBUG_RETURN(FRMTYPE_VIEW); } /* check of key (primary or unique) presence in updatable view SYNOPSIS check_key_in_view() thd thread handler view view for check with opened table RETURN FALSE OK TRUE view do not contain key or all fields */ bool check_key_in_view(THD *thd, TABLE_LIST *view) { DBUG_ENTER("check_key_in_view"); if (!view->view) DBUG_RETURN(FALSE); /* it is normal table */ TABLE *table= view->table; Item **trans= view->field_translation; KEY *key_info= table->key_info; uint primary_key= table->primary_key; uint num= view->view->select_lex.item_list.elements; DBUG_ASSERT(view->table != 0 && view->field_translation != 0); /* try to find key */ for (uint i=0; i < table->keys; i++, key_info++) { if (i == primary_key && !strcmp(key_info->name, primary_key_name) || key_info->flags & HA_NOSAME) { KEY_PART_INFO *key_part= key_info->key_part; bool found= 1; for (uint j=0; j < key_info->key_parts && found; j++, key_part++) { found= 0; for (uint k= 0; k < num; k++) { if (trans[k]->type() == Item::FIELD_ITEM && ((Item_field *)trans[k])->field == key_part->field && (key_part->field->flags & NOT_NULL_FLAG)) { found= 1; break; } } } if (found) DBUG_RETURN(FALSE); } } /* check all fields presence */ { Field **field_ptr= table->field; for (; *field_ptr; ++field_ptr) { uint i= 0; for (; i < num; i++) { if (trans[i]->type() == Item::FIELD_ITEM && ((Item_field *)trans[i])->field == *field_ptr) break; } if (i >= num) { ulong mode= thd->variables.sql_updatable_view_key; /* 1 == YES, 2 == LIMIT1 */ if (mode == 1 || (mode == 2 && thd->lex->select_lex.select_limit == 1)) { DBUG_RETURN(TRUE); } else { push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_WARN_VIEW_WITHOUT_KEY, ER(ER_WARN_VIEW_WITHOUT_KEY)); DBUG_RETURN(FALSE); } } } } DBUG_RETURN(FALSE); } /* insert fields from VIEW (MERGE algorithm) into given list SYNOPSIS insert_view_fields() list list for insertion view view for processing */ void insert_view_fields(List *list, TABLE_LIST *view) { uint num= view->view->select_lex.item_list.elements; Item **trans= view->field_translation; DBUG_ENTER("insert_view_fields"); if (!trans) DBUG_VOID_RETURN; for (uint i= 0; i < num; i++) { if (trans[i]->type() == Item::FIELD_ITEM) { list->push_back(trans[i]); } } DBUG_VOID_RETURN; }