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VIEW
two TABLE_LIST copy eliminated include/mysqld_error.h: errors of view libmysqld/Makefile.am: new view file mysql-test/r/connect.result: SHOW TABLE show type of table mysql-test/r/ctype_recoding.result: SHOW TABLE show type of table mysql-test/r/drop.result: SHOW TABLE show type of table mysql-test/r/grant.result: new two privileges (CRETEA|SHOW VIEW) mysql-test/r/lowercase_table.result: SHOW TABLE show type of table mysql-test/r/ps_1general.result: SHOW TABLE show type of table mysql-test/r/rename.result: SHOW TABLE show type of table mysql-test/r/rpl000009.result: SHOW TABLE show type of table mysql-test/r/rpl_error_ignored_table.result: SHOW TABLE show type of table mysql-test/r/select.result: SHOW TABLE show type of table mysql-test/r/system_mysql_db.result: SHOW TABLE show type of table new two privileges (CRETEA|SHOW VIEW) mysql-test/t/system_mysql_db_fix.test: removing all system tables scripts/mysql_fix_privilege_tables.sql: new two privileges (CRETEA|SHOW VIEW) sql/Makefile.am: new VIEW related file sql/ha_myisammrg.cc: two TABLE_LIST copy eliminated sql/item.cc: VIEW sql/item.h: VIEW sql/item_subselect.cc: VIEW sql/item_subselect.h: VIEW sql/lex.h: VIEW sql/lock.cc: VIEW sql/mysql_priv.h: VIEW sql/mysqld.cc: VIEW new parameter - sql_updatable_view_key sql/opt_sum.cc: two TABLE_LIST copy eliminated sql/set_var.cc: new parameter - sql_updatable_view_key sql/share/czech/errmsg.txt: errors messages of views sql/share/danish/errmsg.txt: errors messages of views sql/share/dutch/errmsg.txt: errors messages of views sql/share/english/errmsg.txt: errors messages of views sql/share/estonian/errmsg.txt: errors messages of views sql/share/french/errmsg.txt: errors messages of views sql/share/german/errmsg.txt: errors messages of views sql/share/greek/errmsg.txt: errors messages of views sql/share/hungarian/errmsg.txt: errors messages of views sql/share/italian/errmsg.txt: errors messages of views sql/share/japanese/errmsg.txt: errors messages of views sql/share/korean/errmsg.txt: errors messages of views sql/share/norwegian-ny/errmsg.txt: errors messages of views sql/share/norwegian/errmsg.txt: errors messages of views sql/share/polish/errmsg.txt: errors messages of views sql/share/portuguese/errmsg.txt: errors messages of views sql/share/romanian/errmsg.txt: errors messages of views sql/share/russian/errmsg.txt: errors messages of views sql/share/serbian/errmsg.txt: errors messages of views sql/share/slovak/errmsg.txt: errors messages of views sql/share/spanish/errmsg.txt: errors messages of views sql/share/swedish/errmsg.txt: errors messages of views sql/share/ukrainian/errmsg.txt: errors messages of views sql/slave.cc: two TABLE_LIST copy eliminated sql/sp.cc: VIEW sql/sql_acl.cc: VIEW sql/sql_acl.h: VIEW sql/sql_base.cc: VIEW sql/sql_cache.cc: two TABLE_LIST copy eliminated sql/sql_class.h: VIEW sql/sql_db.cc: two TABLE_LIST copy eliminated sql/sql_delete.cc: VIEW sql/sql_derived.cc: VIEW sql/sql_handler.cc: two TABLE_LIST copy eliminated sql/sql_help.cc: two TABLE_LIST copy eliminated sql/sql_insert.cc: VIEW sql/sql_lex.cc: VIEW sql/sql_lex.h: VIEW sql/sql_load.cc: VIEW sql/sql_olap.cc: VIEW sql/sql_parse.cc: two TABLE_LIST copy eliminated VIEW sql/sql_prepare.cc: VIEW sql/sql_rename.cc: two TABLE_LIST copy eliminated sql/sql_select.cc: VIEW sql/sql_show.cc: VIEW sql/sql_table.cc: VIEW sql/sql_union.cc: VIEW sql/sql_update.cc: VIEW sql/sql_yacc.yy: VIEW sql/table.cc: VIEW sql/table.h: VIEW sql/tztime.cc: two TABLE_LIST copy eliminated sql/unireg.h: VIEW tests/client_test.c: VIEW
This commit is contained in:
unknown
372
sql/sql_lex.cc
372
sql/sql_lex.cc
@ -995,7 +995,7 @@ void st_select_lex::init_query()
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embedding= 0;
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item_list.empty();
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join= 0;
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where= 0;
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where= prep_where= 0;
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olap= UNSPECIFIED_OLAP_TYPE;
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having_fix_field= 0;
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resolve_mode= NOMATTER_MODE;
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@ -1003,7 +1003,6 @@ void st_select_lex::init_query()
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conds_processed_with_permanent_arena= 0;
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ref_pointer_array= 0;
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select_n_having_items= 0;
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prep_where= 0;
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subquery_in_having= explicit_limit= 0;
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first_execution= 1;
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first_cond_optimization= 1;
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@ -1269,122 +1268,6 @@ bool st_select_lex::test_limit()
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return(0);
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}
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/*
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Interface method of table list creation for query
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SYNOPSIS
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st_select_lex_unit::create_total_list()
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thd THD pointer
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result pointer on result list of tables pointer
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check_derived force derived table chacking (used for creating
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table list for derived query)
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DESCRIPTION
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This is used for UNION & subselect to create a new table list of all used
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tables.
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The table_list->table entry in all used tables are set to point
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to the entries in this list.
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RETURN
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0 - OK
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!0 - error
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*/
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bool st_select_lex_unit::create_total_list(THD *thd_arg, st_lex *lex,
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TABLE_LIST **result_arg)
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{
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*result_arg= 0;
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res= create_total_list_n_last_return(thd_arg, lex, &result_arg);
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return res;
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}
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/*
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Table list creation for query
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SYNOPSIS
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st_select_lex_unit::create_total_list()
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thd THD pointer
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lex pointer on LEX stricture
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result pointer on pointer on result list of tables pointer
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DESCRIPTION
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This is used for UNION & subselect to create a new table list of all used
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tables.
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The table_list->table_list in all tables of global list are set to point
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to the local SELECT_LEX entries.
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RETURN
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0 - OK
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!0 - error
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*/
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bool st_select_lex_unit::
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create_total_list_n_last_return(THD *thd_arg,
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st_lex *lex,
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TABLE_LIST ***result_arg)
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{
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TABLE_LIST *slave_list_first=0, **slave_list_last= &slave_list_first;
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TABLE_LIST **new_table_list= *result_arg, *aux;
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SELECT_LEX *sl= (SELECT_LEX*)slave;
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/*
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iterate all inner selects + fake_select (if exists),
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fake_select->next_select() always is 0
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*/
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for (;
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sl;
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sl= (sl->next_select() ?
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sl->next_select() :
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(sl == fake_select_lex ?
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0 :
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fake_select_lex)))
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{
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// check usage of ORDER BY in union
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if (sl->order_list.first && sl->next_select() && !sl->braces &&
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sl->linkage != GLOBAL_OPTIONS_TYPE)
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{
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net_printf(thd_arg,ER_WRONG_USAGE,"UNION","ORDER BY");
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return 1;
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}
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for (SELECT_LEX_UNIT *inner= sl->first_inner_unit();
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inner;
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inner= inner->next_unit())
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{
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if (inner->create_total_list_n_last_return(thd, lex,
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&slave_list_last))
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return 1;
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}
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if ((aux= (TABLE_LIST*) sl->table_list.first))
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{
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TABLE_LIST *next_table;
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for (; aux; aux= next_table)
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{
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TABLE_LIST *cursor;
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next_table= aux->next;
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/* Add to the total table list */
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if (!(cursor= (TABLE_LIST *) thd->memdup((char*) aux,
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sizeof(*aux))))
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{
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send_error(thd,0);
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return 1;
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}
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*new_table_list= cursor;
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cursor->table_list= aux;
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new_table_list= &cursor->next;
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*new_table_list= 0; // end result list
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aux->table_list= cursor;
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}
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}
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}
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if (slave_list_first)
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{
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*new_table_list= slave_list_first;
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new_table_list= slave_list_last;
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}
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*result_arg= new_table_list;
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return 0;
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}
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st_select_lex_unit* st_select_lex_unit::master_unit()
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{
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@ -1539,7 +1422,7 @@ bool st_select_lex_unit::check_updateable(char *db, char *table)
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*/
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bool st_select_lex::check_updateable(char *db, char *table)
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{
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if (find_real_table_in_list(get_table_list(), db, table))
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if (find_real_table_in_local_list(get_table_list(), db, table))
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return 1;
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for (SELECT_LEX_UNIT *un= first_inner_unit();
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@ -1599,6 +1482,16 @@ void st_select_lex::print_order(String *str, ORDER *order)
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void st_select_lex::print_limit(THD *thd, String *str)
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{
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Item_subselect *item= master_unit()->item;
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if (item &&
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(item->substype() == Item_subselect::EXISTS_SUBS ||
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item->substype() == Item_subselect::IN_SUBS ||
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item->substype() == Item_subselect::ALL_SUBS))
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{
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DBUG_ASSERT(select_limit == 1L && offset_limit == 0L);
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return;
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}
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if (!thd)
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thd= current_thd;
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@ -1619,6 +1512,98 @@ void st_select_lex::print_limit(THD *thd, String *str)
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}
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}
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/*
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Check is merging algorithm can be used on this VIEW
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SYNOPSIS
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st_lex::can_be_merged()
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RETURN
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FALSE - only temporary table algorithm can be used
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TRUE - merge algorithm can be used
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*/
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bool st_lex::can_be_merged()
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{
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// TODO: do not forget implement case when select_lex.table_list.elements==0
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/* find non VIEW subqueries/unions */
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uint selects= 0;
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for (SELECT_LEX *sl= all_selects_list;
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sl && selects <= 1;
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sl= sl->next_select_in_list())
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if (sl->parent_lex == this)
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selects++;
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return (selects <= 1 &&
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select_lex.order_list.elements == 0 &&
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select_lex.group_list.elements == 0 &&
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select_lex.having == 0 &&
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select_lex.table_list.elements == 1 &&
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!(select_lex.options & SELECT_DISTINCT) &&
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select_lex.select_limit == HA_POS_ERROR);
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}
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/*
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check if command can use VIEW with MERGE algorithm
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SYNOPSIS
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st_lex::can_use_merged()
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RETURN
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FALSE - command can't use merged VIEWs
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TRUE - VIEWs with MERGE algorithms can be used
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*/
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bool st_lex::can_use_merged()
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{
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switch (sql_command)
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{
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case SQLCOM_SELECT:
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case SQLCOM_CREATE_TABLE:
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case SQLCOM_UPDATE:
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case SQLCOM_UPDATE_MULTI:
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case SQLCOM_DELETE:
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case SQLCOM_DELETE_MULTI:
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case SQLCOM_INSERT:
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case SQLCOM_INSERT_SELECT:
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case SQLCOM_REPLACE:
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case SQLCOM_REPLACE_SELECT:
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return TRUE;
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default:
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return FALSE;
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}
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}
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/*
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Detect that we need only table structure of derived table/view
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SYNOPSIS
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only_view_structure()
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RETURN
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TRUE yes, we need only structure
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FALSE no, we need data
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*/
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bool st_lex::only_view_structure()
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{
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switch(sql_command)
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{
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case SQLCOM_SHOW_CREATE:
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case SQLCOM_SHOW_TABLES:
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case SQLCOM_SHOW_FIELDS:
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case SQLCOM_REVOKE_ALL:
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case SQLCOM_REVOKE:
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case SQLCOM_GRANT:
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case SQLCOM_CREATE_VIEW:
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return TRUE;
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default:
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return FALSE;
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}
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}
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/*
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initialize limit counters
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@ -1627,6 +1612,7 @@ void st_select_lex::print_limit(THD *thd, String *str)
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values - SELECT_LEX with initial values for counters
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sl - SELECT_LEX for options set
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*/
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void st_select_lex_unit::set_limit(SELECT_LEX *values,
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SELECT_LEX *sl)
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{
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@ -1645,35 +1631,83 @@ void st_select_lex_unit::set_limit(SELECT_LEX *values,
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SYNOPSIS
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unlink_first_table()
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tables Global table list
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global_first Save first global table here
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local_first Save first local table here
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link_to_local do we need link this table to local
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NORES
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global_first & local_first are used to save result for link_first_table_back
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NOTES
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We rely on fact that first table in both list are same or local list
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is empty
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RETURN
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global list without first table
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unlinked table
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*/
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TABLE_LIST *st_lex::unlink_first_table(TABLE_LIST *tables,
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TABLE_LIST **global_first,
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TABLE_LIST **local_first)
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TABLE_LIST *st_lex::unlink_first_table(bool *link_to_local)
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{
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*global_first= tables;
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*local_first= (TABLE_LIST*)select_lex.table_list.first;
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/*
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Exclude from global table list
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*/
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tables= tables->next;
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/*
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and from local list if it is not the same
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*/
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select_lex.table_list.first= ((&select_lex != all_selects_list) ?
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(byte*) (*local_first)->next :
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(byte*) tables);
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(*global_first)->next= 0;
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return tables;
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TABLE_LIST *first;
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if ((first= query_tables))
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{
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/*
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Exclude from global table list
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*/
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if ((query_tables= query_tables->next_global))
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query_tables->prev_global= &query_tables;
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first->next_global= 0;
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/*
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and from local list if it is not empty
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*/
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if ((*link_to_local= test(select_lex.table_list.first)))
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{
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select_lex.table_list.first= (byte*) first->next_local;
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select_lex.table_list.elements--; //safety
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first->next_local= 0;
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/*
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reorder global list to keep first tables the same in both lists
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(if it is need)
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*/
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first_lists_tables_same();
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}
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}
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return first;
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}
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/*
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Bring first local table of first most outer select to first place in global
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table list
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SYNOPSYS
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st_lex::first_lists_tables_same()
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NOTES
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In many cases first table of main SELECT_LEX have special meaning =>
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check that it is first table in global list and relink it first in
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queries_tables list if it is necessary (we need such relinking only
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for queries with subqueries in select list, in this case tables of
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subqueries will go to global list first)
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*/
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void st_lex::first_lists_tables_same()
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{
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TABLE_LIST *first_table= (TABLE_LIST*) select_lex.table_list.first;
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if (query_tables != first_table && first_table != 0)
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{
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if (query_tables_last == &first_table->next_global)
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query_tables_last= first_table->prev_global;
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TABLE_LIST *next= *first_table->prev_global= first_table->next_global;
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first_table->next_global= 0;
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if (next)
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next->prev_global= first_table->prev_global;
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/* include in new place */
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first_table->next_global= query_tables;
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/*
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we are sure that above is not 0, because first_table was not
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first table in global list => we can do following without check
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*/
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query_tables->prev_global= &first_table->next_global;
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first_table->prev_global= &query_tables;
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query_tables= first_table;
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}
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}
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@ -1682,36 +1716,54 @@ TABLE_LIST *st_lex::unlink_first_table(TABLE_LIST *tables,
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SYNOPSIS
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link_first_table_back()
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tables Global table list
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global_first Saved first global table
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local_first Saved first local table
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link_to_local do we need link this table to local
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RETURN
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global list
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*/
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TABLE_LIST *st_lex::link_first_table_back(TABLE_LIST *tables,
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TABLE_LIST *global_first,
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TABLE_LIST *local_first)
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void st_lex::link_first_table_back(TABLE_LIST *first,
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bool link_to_local)
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{
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global_first->next= tables;
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if (&select_lex != all_selects_list)
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if (first)
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{
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/*
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we do not touch local table 'next' field => we need just
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put the table in the list
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*/
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select_lex.table_list.first= (byte*) local_first;
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if ((first->next_global= query_tables))
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query_tables->prev_global= &first->next_global;
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query_tables= first;
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if (link_to_local)
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{
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first->next_local= (TABLE_LIST*) select_lex.table_list.first;
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select_lex.table_list.first= (byte*) first;
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select_lex.table_list.elements++; //safety
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}
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}
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}
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/*
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fix some structures at the end of preparation
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SYNOPSIS
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st_select_lex::fix_prepare_information
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thd thread handler
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conds pointer on conditions which will be used for execution statement
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*/
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void st_select_lex::fix_prepare_information(THD *thd, Item **conds)
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{
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if (thd->current_arena && first_execution)
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{
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prep_where= where;
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first_execution= 0;
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}
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else
|
||||
select_lex.table_list.first= (byte*) global_first;
|
||||
return global_first;
|
||||
}
|
||||
|
||||
/*
|
||||
There are st_select_lex::add_table_to_list &
|
||||
There are st_select_lex::add_table_to_list &
|
||||
st_select_lex::set_lock_for_tables are in sql_parse.cc
|
||||
|
||||
st_select_lex::print is in sql_select.h
|
||||
st_select_lex::print is in sql_select.cc
|
||||
|
||||
st_select_lex_unit::prepare, st_select_lex_unit::exec,
|
||||
st_select_lex_unit::cleanup, st_select_lex_unit::reinit_exec_mechanism,
|
||||
|
||||
Reference in New Issue
Block a user