--disable_warnings drop table if exists t1,t2,`t1a``b`,v1,v2,v3,v4,v5,v6; drop view if exists t1,t2,`t1a``b`,v1,v2,v3,v4,v5,v6; drop database if exists mysqltest; --enable_warnings use test; # # some basic test of views and its functionality # # create view on unexistence table -- error 1146 create view v1 (c,d) as select a,b from t1; create temporary table t1 (a int, b int); #view on temporary table -- error 1351 create view v1 (c) as select b+1 from t1; drop table t1; create table t1 (a int, b int); insert into t1 values (1,2), (1,3), (2,4), (2,5), (3,10); #view with variable -- error 1350 create view v1 (c,d) as select a,b+@@global.max_user_connections from t1; # simple view create view v1 (c) as select b+1 from t1; select c from v1; #tamporary table should not shade (hide) table of view create temporary table t1 (a int, b int); # this is empty select * from t1; # but this based on normal t1 select c from v1; show create table v1; show create view v1; -- error 1346 show create view t1; drop table t1; # try to use fields from underlaid table -- error 1054 select a from v1; -- error 1054 select v1.a from v1; -- error 1054 select b from v1; -- error 1054 select v1.b from v1; # view with different algorithms (explain out put are differ) explain extended select c from v1; create algorithm=temptable view v2 (c) as select b+1 from t1; show create table v2; select c from v2; explain extended select c from v2; # try to use underlaid table fields in VIEW creation process -- error 1054 create view v3 (c) as select a+1 from v1; -- error 1054 create view v3 (c) as select b+1 from v1; # VIEW on VIEW test with mixing different algorithms on different order create view v3 (c) as select c+1 from v1; select c from v3; explain extended select c from v3; create algorithm=temptable view v4 (c) as select c+1 from v2; select c from v4; explain extended select c from v4; create view v5 (c) as select c+1 from v2; select c from v5; explain extended select c from v5; create algorithm=temptable view v6 (c) as select c+1 from v1; select c from v6; explain extended select c from v6; # show table/table status test show tables; --replace_column 12 # 13 # show table status; drop view v1,v2,v3,v4,v5,v6; # # alter/create view test # # view with subqueries of different types create view v1 (c,d,e,f) as select a,b, a in (select a+2 from t1), a = all (select a from t1) from t1; create view v2 as select c, d from v1; select * from v1; select * from v2; # try to create VIEW with name of existing VIEW -- error 1050 create view v1 (c,d,e,f) as select a,b, a in (select a+2 from t1), a = all (select a from t1) from t1; # 'or replace' should work in this case create or replace view v1 (c,d,e,f) as select a,b, a in (select a+2 from t1), a = all (select a from t1) from t1; # try to ALTER unexisting VIEW drop view v2; -- error 1146 alter view v2 as select c, d from v1; # 'or replace' on unexisting view create or replace view v2 as select c, d from v1; # alter view on existing view alter view v1 (c,d) as select a,max(b) from t1 group by a; # check that created view works select * from v1; select * from v2; # simple test of grants grant create view on test.* to test@localhost; show grants for test@localhost; revoke create view on test.* from test@localhost; show grants for test@localhost; #try to drop unexisten VIEW -- error 1051 drop view v100; #try to drop table with DROP VIEW -- error 1346 drop view t1; #try to drop VIEW with DROP TABLE -- error 1051 drop table v1; #try to drop table with DROP VIEW drop view v1,v2; drop table t1; # # outer left join with merged views # create table t1 (a int); insert into t1 values (1), (2), (3); create view v1 (a) as select a+1 from t1; create view v2 (a) as select a-1 from t1; select * from t1 natural left join v1; select * from v2 natural left join t1; select * from v2 natural left join v1; drop view v1, v2; drop table t1; # # grant create view test # connect (root,localhost,root,,test); connection root; --disable_warnings create database mysqltest; --enable_warnings create table mysqltest.t1 (a int, b int); create table mysqltest.t2 (a int, b int); grant select on mysqltest.t1 to mysqltest_1@localhost; grant create view,select on test.* to mysqltest_1@localhost; connect (user1,localhost,mysqltest_1,,test); connection user1; create view v1 as select * from mysqltest.t1; # no CRETE VIEW privilege -- error 1142 create view mysqltest.v2 as select * from mysqltest.t1; # no SELECT privilege -- error 1142 create view v2 as select * from mysqltest.t2; connection root; revoke all privileges on mysqltest.t1 from mysqltest_1@localhost; revoke all privileges on test.* from mysqltest_1@localhost; drop database mysqltest; drop view test.v1; # # grants per columns # # MERGE algorithm --disable_warnings create database mysqltest; --enable_warnings create table mysqltest.t1 (a int, b int); create view mysqltest.v1 (c,d) as select a+1,b+1 from mysqltest.t1; grant select (c) on mysqltest.v1 to mysqltest_1@localhost; connection user1; select c from mysqltest.v1; # there are not privilege ob column 'd' -- error 1143 select d from mysqltest.v1; connection root; revoke all privileges on mysqltest.v1 from mysqltest_1@localhost; delete from mysql.user where user='mysqltest_1'; drop database mysqltest; # TEMPORARY TABLE algorithm --disable_warnings create database mysqltest; --enable_warnings create table mysqltest.t1 (a int, b int); create algorithm=temptable view mysqltest.v1 (c,d) as select a+1,b+1 from mysqltest.t1; grant select (c) on mysqltest.v1 to mysqltest_1@localhost; connection user1; select c from mysqltest.v1; # there are not privilege ob column 'd' -- error 1143 select d from mysqltest.v1; connection root; revoke all privileges on mysqltest.v1 from mysqltest_1@localhost; delete from mysql.user where user='mysqltest_1'; drop database mysqltest; # # EXPLAIN rights # connection root; --disable_warnings create database mysqltest; --enable_warnings #prepare views and tables create table mysqltest.t1 (a int, b int); create table mysqltest.t2 (a int, b int); create view mysqltest.v1 (c,d) as select a+1,b+1 from mysqltest.t1; create algorithm=temptable view mysqltest.v2 (c,d) as select a+1,b+1 from mysqltest.t1; create view mysqltest.v3 (c,d) as select a+1,b+1 from mysqltest.t2; create algorithm=temptable view mysqltest.v4 (c,d) as select a+1,b+1 from mysqltest.t2; grant select on mysqltest.v1 to mysqltest_1@localhost; grant select on mysqltest.v2 to mysqltest_1@localhost; grant select on mysqltest.v3 to mysqltest_1@localhost; grant select on mysqltest.v4 to mysqltest_1@localhost; connection user1; # all selects works select c from mysqltest.v1; select c from mysqltest.v2; select c from mysqltest.v3; select c from mysqltest.v4; # test of show coluns show columns from mysqltest.v1; show columns from mysqltest.v2; # but explain/show do not -- error 1344 explain select c from mysqltest.v1; -- error 1344 show create table mysqltest.v1; -- error 1344 explain select c from mysqltest.v2; -- error 1344 show create table mysqltest.v2; -- error 1344 explain select c from mysqltest.v3; -- error 1344 show create table mysqltest.v3; -- error 1344 explain select c from mysqltest.v4; -- error 1344 show create table mysqltest.v4; # allow to see one of underlaing table connection root; grant select on mysqltest.t1 to mysqltest_1@localhost; connection user1; # EXPLAIN of view on above table works explain select c from mysqltest.v1; show create table mysqltest.v1; explain select c from mysqltest.v2; show create table mysqltest.v2; # but other EXPLAINs do not -- error 1344 explain select c from mysqltest.v3; -- error 1344 show create table mysqltest.v3; -- error 1344 explain select c from mysqltest.v4; -- error 1344 show create table mysqltest.v4; # allow to see any view in mysqltest database connection root; grant show view on mysqltest.* to mysqltest_1@localhost; connection user1; explain select c from mysqltest.v1; show create table mysqltest.v1; explain select c from mysqltest.v2; show create table mysqltest.v2; explain select c from mysqltest.v3; show create table mysqltest.v3; explain select c from mysqltest.v4; show create table mysqltest.v4; connection root; revoke all privileges on mysqltest.* from mysqltest_1@localhost; delete from mysql.user where user='mysqltest_1'; drop database mysqltest; # # QUERY CHECHE options for VIEWs # set GLOBAL query_cache_size=1355776; flush status; create table t1 (a int, b int); # queries with following views should not be in query cache create view v1 (c,d) as select sql_no_cache a,b from t1; create view v2 (c,d) as select a+rand(),b from t1; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; show status like "Qcache_hits"; select * from v1; select * from v2; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; show status like "Qcache_hits"; select * from v1; select * from v2; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; show status like "Qcache_hits"; drop view v1,v2; # SQL_CACHE option set query_cache_type=demand; flush status; # query with view will be cached, but direct acess to table will not create view v1 (c,d) as select sql_cache a,b from t1; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; show status like "Qcache_hits"; select * from v1; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; show status like "Qcache_hits"; select * from t1; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; show status like "Qcache_hits"; select * from v1; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; show status like "Qcache_hits"; select * from t1; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; show status like "Qcache_hits"; drop view v1; set query_cache_type=default; drop table t1; set GLOBAL query_cache_size=default; # # DISTINCT option for VIEW # create table t1 (a int); insert into t1 values (1), (2), (3), (1), (2), (3); create view v1 as select distinct a from t1; select * from v1; explain select * from v1; select * from t1; drop view v1; drop table t1; # # syntax compatibility # create table t1 (a int); create view v1 as select distinct a from t1 WITH CHECK OPTION; create view v2 as select distinct a from t1 WITH CASCADED CHECK OPTION; create view v3 as select distinct a from t1 WITH LOCAL CHECK OPTION; drop view v3 RESTRICT; drop view v2 CASCADE; drop view v1; drop table t1; # # aliases # create table t1 (a int, b int); insert into t1 values (1,2), (1,3), (2,4), (2,5), (3,10); create view v1 (c) as select b+1 from t1; select test.c from v1 test; create algorithm=temptable view v2 (c) as select b+1 from t1; select test.c from v2 test; select test1.* from v1 test1, v2 test2 where test1.c=test2.c; select test2.* from v1 test1, v2 test2 where test1.c=test2.c; drop table t1; drop view v1,v2; # # LIMIT clasuse test # create table t1 (a int); insert into t1 values (1), (2), (3), (4); create view v1 as select a+1 from t1 order by 1 desc limit 2; select * from v1; explain select * from v1; drop view v1; drop table t1; # # CREATE ... SELECT view test # create table t1 (a int); insert into t1 values (1), (2), (3), (4); create view v1 as select a+1 from t1; create table t2 select * from v1; show columns from t2; select * from t2; drop view v1; drop table t1,t2; # # simple view + simple update # create table t1 (a int, b int, primary key(a)); insert into t1 values (10,2), (20,3), (30,4), (40,5), (50,10); create view v1 (a,c) as select a, b+1 from t1; create algorithm=temptable view v2 (a,c) as select a, b+1 from t1; # try to update expression -- error 1347 update v1 set c=a+c; # try to update VIEW with forced TEMPORARY TABLE algorithm -- error 1288 update v2 set a=a+c; # updatable field of updateable view update v1 set a=a+c; select * from v1; select * from t1; drop table t1; drop view v1,v2; # # simple view + simple multi-update # create table t1 (a int, b int, primary key(a)); insert into t1 values (10,2), (20,3), (30,4), (40,5), (50,10); create table t2 (x int); insert into t2 values (10), (20); create view v1 (a,c) as select a, b+1 from t1; create algorithm=temptable view v2 (a,c) as select a, b+1 from t1; # try to update expression -- error 1347 update t2,v1 set v1.c=v1.a+v1.c where t2.x=v1.a; # try to update VIEW with forced TEMPORARY TABLE algorithm -- error 1288 update t2,v2 set v2.a=v2.v2.a+c where t2.x=v2.a; # updatable field of updateable view update t2,v1 set v1.a=v1.a+v1.c where t2.x=v1.a; select * from v1; select * from t1; drop table t1,t2; drop view v1,v2; # # UPDATE privileges on VIEW columns and whole VIEW # connection root; --disable_warnings create database mysqltest; --enable_warnings create table mysqltest.t1 (a int, b int, primary key(a)); insert into mysqltest.t1 values (10,2), (20,3), (30,4), (40,5), (50,10); create table mysqltest.t2 (x int); insert into mysqltest.t2 values (3), (4), (5), (6); create view mysqltest.v1 (a,c) as select a, b+1 from mysqltest.t1; create view mysqltest.v2 (a,c) as select a, b from mysqltest.t1; create view mysqltest.v3 (a,c) as select a, b+1 from mysqltest.t1; grant update (a) on mysqltest.v2 to mysqltest_1@localhost; grant update on mysqltest.v1 to mysqltest_1@localhost; grant select on mysqltest.* to mysqltest_1@localhost; connection user1; use mysqltest; # update with rights on VIEW column update t2,v1 set v1.a=v1.a+v1.c where t2.x=v1.c; select * from t1; update v1 set a=a+c; select * from t1; # update with rights on whole VIEW update t2,v2 set v2.a=v2.a+v2.c where t2.x=v2.c; select * from t1; update v2 set a=a+c; select * from t1; # no rights on column -- error 1143 update t2,v2 set v2.c=v2.a+v2.c where t2.x=v2.c; -- error 1143 update v2 set c=a+c; # no rights for view -- error 1143 update t2,v3 set v3.a=v3.a+v3.c where t2.x=v3.c; -- error 1142 update v3 set a=a+c; use test; connection root; REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost; drop database mysqltest; # # MEREGE VIEW with WHERE clause # create table t1 (a int, b int, primary key(b)); insert into t1 values (1,20), (2,30), (3,40), (4,50), (5,100); create view v1 (c) as select b from t1 where a<3; # simple select and explaint to be sure that it is MERGE select * from v1; explain extended select * from v1; # update test update v1 set c=c+1; select * from t1; # join of such VIEWs test create view v2 (c) as select b from t1 where a>=3; select * from v1, v2; drop view v1, v2; drop table t1; # # simple view + simple delete # create table t1 (a int, b int, primary key(a)); insert into t1 values (1,2), (2,3), (3,4), (4,5), (5,10); create view v1 (a,c) as select a, b+1 from t1; create algorithm=temptable view v2 (a,c) as select a, b+1 from t1; # try to update VIEW with forced TEMPORARY TABLE algorithm -- error 1288 delete from v2 where c < 4; # updatable field of updateable view delete from v1 where c < 4; select * from v1; select * from t1; drop table t1; drop view v1,v2; # # simple view + simple multi-delete # create table t1 (a int, b int, primary key(a)); insert into t1 values (1,2), (2,3), (3,4), (4,5), (5,10); create table t2 (x int); insert into t2 values (1), (2), (3), (4); create view v1 (a,c) as select a, b+1 from t1; create algorithm=temptable view v2 (a,c) as select a, b+1 from t1; # try to update VIEW with forced TEMPORARY TABLE algorithm -- error 1288 delete v2 from t2,v2 where t2.x=v2.a; # updatable field of updateable view delete v1 from t2,v1 where t2.x=v1.a; select * from v1; select * from t1; drop table t1,t2; drop view v1,v2; # # DELETE privileges on VIEW # connection root; --disable_warnings create database mysqltest; --enable_warnings create table mysqltest.t1 (a int, b int, primary key(a)); insert into mysqltest.t1 values (1,2), (2,3), (3,4), (4,5), (5,10); create table mysqltest.t2 (x int); insert into mysqltest.t2 values (3), (4), (5), (6); create view mysqltest.v1 (a,c) as select a, b+1 from mysqltest.t1; create view mysqltest.v2 (a,c) as select a, b+1 from mysqltest.t1; grant delete on mysqltest.v1 to mysqltest_1@localhost; grant select on mysqltest.* to mysqltest_1@localhost; connection user1; use mysqltest; # update with rights on VIEW column delete from v1 where c < 4; select * from t1; delete v1 from t2,v1 where t2.x=v1.c; select * from t1; # no rights for view -- error 1142 delete v2 from t2,v2 where t2.x=v2.c; -- error 1142 delete from v2 where c < 4; use test; connection root; REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost; drop database mysqltest; # # key presence check # create table t1 (a int, b int, c int, primary key(a,b)); insert into t1 values (10,2,-1), (20,3,-2), (30,4,-3), (40,5,-4), (50,10,-5); create view v1 (x,y) as select a, b from t1; create view v2 (x,y) as select a, c from t1; set sql_updatable_view_key=YES; update v1 set x=x+1; -- error 1288 update v2 set x=x+1; set sql_updatable_view_key=LIMIT1; update v1 set x=x+1; update v2 set x=x+1; update v1 set x=x+1 limit 1; -- error 1288 update v2 set x=x+1 limit 1; set sql_updatable_view_key=NO; update v1 set x=x+1 limit 1; update v2 set x=x+1 limit 1; set sql_updatable_view_key=DEFAULT; select * from t1; drop table t1; drop view v1,v2; # # simple insert # create table t1 (a int, b int, c int, primary key(a,b)); insert into t1 values (10,2,-1), (20,3,-2); create view v1 (x,y,z) as select c, b, a from t1; create view v2 (x,y) as select b, a from t1; create view v3 (x,y,z) as select b, a, b from t1; create view v4 (x,y,z) as select c+1, b, a from t1; create algorithm=temptable view v5 (x,y,z) as select c, b, a from t1; # try insert to VIEW with fields duplicate -- error 1288 insert into v3 values (-60,4,30); # try insert to VIEW with expression in SELECT list -- error 1288 insert into v4 values (-60,4,30); # try insert to VIEW using temporary table algorithm -- error 1288 insert into v5 values (-60,4,30); insert into v1 values (-60,4,30); insert into v1 (z,y,x) values (50,6,-100); insert into v2 values (5,40); select * from t1; drop table t1; drop view v1,v2,v3,v4,v5; # # insert ... select # create table t1 (a int, b int, c int, primary key(a,b)); insert into t1 values (10,2,-1), (20,3,-2); create table t2 (a int, b int, c int, primary key(a,b)); insert into t2 values (30,4,-60); create view v1 (x,y,z) as select c, b, a from t1; create view v2 (x,y) as select b, a from t1; create view v3 (x,y,z) as select b, a, b from t1; create view v4 (x,y,z) as select c+1, b, a from t1; create algorithm=temptable view v5 (x,y,z) as select c, b, a from t1; # try insert to VIEW with fields duplicate -- error 1288 insert into v3 select c, b, a from t2; # try insert to VIEW with expression in SELECT list -- error 1288 insert into v4 select c, b, a from t2; # try insert to VIEW using temporary table algorithm -- error 1288 insert into v5 select c, b, a from t2; insert into v1 select c, b, a from t2; insert into v1 (z,y,x) select a+20,b+2,-100 from t2; insert into v2 select b+1, a+10 from t2; select * from t1; drop table t1; drop view v1,v2,v3,v4,v5; # # insert privileges on VIEW # connection root; --disable_warnings create database mysqltest; --enable_warnings create table mysqltest.t1 (a int, b int, primary key(a)); insert into mysqltest.t1 values (1,2), (2,3); create table mysqltest.t2 (x int, y int); insert into mysqltest.t2 values (3,4); create view mysqltest.v1 (a,c) as select a, b from mysqltest.t1; create view mysqltest.v2 (a,c) as select a, b from mysqltest.t1; grant insert on mysqltest.v1 to mysqltest_1@localhost; grant select on mysqltest.* to mysqltest_1@localhost; connection user1; use mysqltest; # update with rights on VIEW column insert into v1 values (5,6); select * from t1; insert into v1 select x,y from t2; select * from t1; # no rights for view -- error 1142 insert into v2 values (5,6); -- error 1142 insert into v2 select x,y from t2; use test; connection root; REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost; drop database mysqltest; # # outer join based on VIEW with WHERE clause # create table t1 (a int, primary key(a)); insert into t1 values (1), (2), (3); create view v1 (x) as select a from t1 where a > 1; select t1.a, v1.x from t1 left join v1 on (t1.a= v1.x); drop table t1; drop view v1; # # merging WHERE condition on VIEW on VIEW # create table t1 (a int, primary key(a)); insert into t1 values (1), (2), (3), (200); create view v1 (x) as select a from t1 where a > 1; create view v2 (y) as select x from v1 where x < 100; select * from v2; drop table t1; drop view v1,v2; # # VIEW on non-updatable view # create table t1 (a int, primary key(a)); insert into t1 values (1), (2), (3), (200); create ALGORITHM=TEMPTABLE view v1 (x) as select a from t1; create view v2 (y) as select x from v1; -- error 1288 update v2 set y=10 where y=2; drop table t1; drop view v1,v2; # # auto_increment field out of VIEW # create table t1 (a int not null auto_increment, b int not null, primary key(a), unique(b)); create view v1 (x) as select b from t1; insert into v1 values (1); select last_insert_id(); insert into t1 (b) values (2); select last_insert_id(); select * from t1; drop view v1; drop table t1; # # test of CREATE VIEW privileges if we have limited privileges # connection root; --disable_warnings create database mysqltest; --enable_warnings create table mysqltest.t1 (a int, b int); create table mysqltest.t2 (a int, b int); grant update on mysqltest.t1 to mysqltest_1@localhost; grant update(b) on mysqltest.t2 to mysqltest_1@localhost; grant create view,update on test.* to mysqltest_1@localhost; connection user1; create view v1 as select * from mysqltest.t1; create view v2 as select b from mysqltest.t2; # There are not rights on mysqltest.v1 --error 1142 create view mysqltest.v1 as select * from mysqltest.t1; # There are not any rights on mysqltest.t2.a -- error 1143 create view v3 as select a from mysqltest.t2; # give CRETEA VIEW privileges but without any privileges for result colemn connection root; create table mysqltest.v3 (b int); grant create view on mysqltest.v3 to mysqltest_1@localhost; drop table mysqltest.v3; connection user1; -- error 1143 create view mysqltest.v3 as select b from mysqltest.t2; # give UPDATE privileges -> create works connection root; create table mysqltest.v3 (b int); grant create view, update on mysqltest.v3 to mysqltest_1@localhost; drop table mysqltest.v3; connection user1; create view mysqltest.v3 as select b from mysqltest.t2; # If give other privileges for VIEW then underlaying table have => # creation prohibited connection root; grant select(b) on mysqltest.v3 to mysqltest_1@localhost; drop view mysqltest.v3; connection user1; -- error 1142 create view mysqltest.v3 as select b from mysqltest.t2; # Expression need select privileges -- error 1143 create view v4 as select b+1 from mysqltest.t2; connection root; grant create view,update,select on test.* to mysqltest_1@localhost; connection user1; -- error 1143 create view v4 as select b+1 from mysqltest.t2; connection root; grant update,select(b) on mysqltest.t2 to mysqltest_1@localhost; connection user1; create view v4 as select b+1 from mysqltest.t2; connection root; REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost; drop database mysqltest; drop view v1,v2; # # VIEW fields quoting # set sql_mode='ansi'; create table t1 ("a*b" int); create view v1 as select "a*b" from t1; show create view v1; drop view v1; drop table t1; set sql_mode=default; # # VIEW without tables # create table t1 (t_column int); create view v1 as select 'a'; select * from v1, t1; drop view v1; drop table t1; # # quote mark inside table name # create table `t1a``b` (col1 char(2)); create view v1 as select * from `t1a``b`; select * from v1; describe v1; drop view v1; drop table `t1a``b`; # # Changing of underlaying table # create table t1 (col1 char(5),col2 char(5)); create view v1 as select * from t1; drop table t1; create table t1 (col1 char(5),newcol2 char(5)); -- error 1355 insert into v1 values('a','aa'); drop table t1; -- error 1355 select * from v1; drop view v1; # # check of duplication of column names # -- error 1060 create view v1 (a,a) as select 'a','a'; # # SP variables inside view test # delimiter //; create procedure p1 () begin declare v int; create view v1 as select v; end;// delimiter ;// -- error 1350 call p1(); drop procedure p1; # # updateablity should be transitive # create table t1 (col1 int,col2 char(22)); insert into t1 values(5,'Hello, world of views'); create view v1 as select * from t1; create view v2 as select * from v1; update v2 set col2='Hello, view world'; select * from t1; drop view v2, v1; drop table t1; # # check 'use index' on view with temporary table # create table t1 (a int, b int); create view v1 as select a, sum(b) from t1 group by a; -- error 1072 select b from v1 use index (some_index) where b=1; drop view v1; drop table t1; # # using VIEW fields several times in query resolved via temporary tables # create table t1 (col1 char(5),col2 char(5)); create view v1 (col1,col2) as select col1,col2 from t1; insert into v1 values('s1','p1'),('s1','p2'),('s1','p3'),('s1','p4'),('s2','p1'),('s3','p2'),('s4','p4'); select distinct first.col2 from t1 first where first.col2 in (select second.col2 from t1 second where second.col1<>first.col1); select distinct first.col2 from v1 first where first.col2 in (select second.col2 from t1 second where second.col1<>first.col1); drop view v1; drop table t1; # # Test of view updatebility in prepared statement # create table t1 (a int); create view v1 as select a from t1; insert into t1 values (1); #update SET @v0 = '2'; PREPARE stmt FROM 'UPDATE v1 SET a = ?'; EXECUTE stmt USING @v0; DEALLOCATE PREPARE stmt; #insert without field list SET @v0 = '3'; PREPARE stmt FROM 'insert into v1 values (?)'; EXECUTE stmt USING @v0; DEALLOCATE PREPARE stmt; #insert with field list SET @v0 = '4'; PREPARE stmt FROM 'insert into v1 (a) values (?)'; EXECUTE stmt USING @v0; DEALLOCATE PREPARE stmt; select * from t1; drop view v1; drop table t1; # # error on preparation # -- error 1096 CREATE VIEW v02 AS SELECT * FROM DUAL; SHOW TABLES; # # EXISTS with UNION VIEW # CREATE VIEW v1 AS SELECT EXISTS (SELECT 1 UNION SELECT 2); select * from v1; drop view v1; # # using VIEW where table is required # create table t1 (col1 int,col2 char(22)); create view v1 as select * from t1; -- error 1346 create index i1 on v1 (col1); drop view v1; drop table t1; # # connection_id(), pi(), current_user(), version() representation test # CREATE VIEW v1 (f1,f2,f3,f4) AS SELECT connection_id(), pi(), current_user(), version(); SHOW CREATE VIEW v1; drop view v1;