alter_table.sql

PostgreSQL 8.1.4的源码 适用于Linux下的开源数据库系统

insert into atacc3 (test2) values (-3);
insert into atacc3 (test2) values (3);
drop table atacc3;
drop table atacc2;
drop table atacc1;

-- test unique constraint adding

create table atacc1 ( test int ) with oids;
-- add a unique constraint
alter table atacc1 add constraint atacc_test1 unique (test);
-- insert first value
insert into atacc1 (test) values (2);
-- should fail
insert into atacc1 (test) values (2);
-- should succeed
insert into atacc1 (test) values (4);
-- try adding a unique oid constraint
alter table atacc1 add constraint atacc_oid1 unique(oid);
drop table atacc1;

-- let's do one where the unique constraint fails when added
create table atacc1 ( test int );
-- insert soon to be failing rows
insert into atacc1 (test) values (2);
insert into atacc1 (test) values (2);
-- add a unique constraint (fails)
alter table atacc1 add constraint atacc_test1 unique (test);
insert into atacc1 (test) values (3);
drop table atacc1;

-- let's do one where the unique constraint fails
-- because the column doesn't exist
create table atacc1 ( test int );
-- add a unique constraint (fails)
alter table atacc1 add constraint atacc_test1 unique (test1);
drop table atacc1;

-- something a little more complicated
create table atacc1 ( test int, test2 int);
-- add a unique constraint
alter table atacc1 add constraint atacc_test1 unique (test, test2);
-- insert initial value
insert into atacc1 (test,test2) values (4,4);
-- should fail
insert into atacc1 (test,test2) values (4,4);
-- should all succeed
insert into atacc1 (test,test2) values (4,5);
insert into atacc1 (test,test2) values (5,4);
insert into atacc1 (test,test2) values (5,5);
drop table atacc1;

-- lets do some naming tests
create table atacc1 (test int, test2 int, unique(test));
alter table atacc1 add unique (test2);
-- should fail for @@ second one @@
insert into atacc1 (test2, test) values (3, 3);
insert into atacc1 (test2, test) values (2, 3);
drop table atacc1;

-- test primary key constraint adding

create table atacc1 ( test int ) with oids;
-- add a primary key constraint
alter table atacc1 add constraint atacc_test1 primary key (test);
-- insert first value
insert into atacc1 (test) values (2);
-- should fail
insert into atacc1 (test) values (2);
-- should succeed
insert into atacc1 (test) values (4);
-- inserting NULL should fail
insert into atacc1 (test) values(NULL);
-- try adding a second primary key (should fail)
alter table atacc1 add constraint atacc_oid1 primary key(oid);
-- drop first primary key constraint
alter table atacc1 drop constraint atacc_test1 restrict;
-- try adding a primary key on oid (should succeed)
alter table atacc1 add constraint atacc_oid1 primary key(oid);
drop table atacc1;

-- let's do one where the primary key constraint fails when added
create table atacc1 ( test int );
-- insert soon to be failing rows
insert into atacc1 (test) values (2);
insert into atacc1 (test) values (2);
-- add a primary key (fails)
alter table atacc1 add constraint atacc_test1 primary key (test);
insert into atacc1 (test) values (3);
drop table atacc1;

-- let's do another one where the primary key constraint fails when added
create table atacc1 ( test int );
-- insert soon to be failing row
insert into atacc1 (test) values (NULL);
-- add a primary key (fails)
alter table atacc1 add constraint atacc_test1 primary key (test);
insert into atacc1 (test) values (3);
drop table atacc1;

-- let's do one where the primary key constraint fails
-- because the column doesn't exist
create table atacc1 ( test int );
-- add a primary key constraint (fails)
alter table atacc1 add constraint atacc_test1 primary key (test1);
drop table atacc1;

-- something a little more complicated
create table atacc1 ( test int, test2 int);
-- add a primary key constraint
alter table atacc1 add constraint atacc_test1 primary key (test, test2);
-- try adding a second primary key - should fail
alter table atacc1 add constraint atacc_test2 primary key (test);
-- insert initial value
insert into atacc1 (test,test2) values (4,4);
-- should fail
insert into atacc1 (test,test2) values (4,4);
insert into atacc1 (test,test2) values (NULL,3);
insert into atacc1 (test,test2) values (3, NULL);
insert into atacc1 (test,test2) values (NULL,NULL);
-- should all succeed
insert into atacc1 (test,test2) values (4,5);
insert into atacc1 (test,test2) values (5,4);
insert into atacc1 (test,test2) values (5,5);
drop table atacc1;

-- lets do some naming tests
create table atacc1 (test int, test2 int, primary key(test));
-- only first should succeed
insert into atacc1 (test2, test) values (3, 3);
insert into atacc1 (test2, test) values (2, 3);
insert into atacc1 (test2, test) values (1, NULL);
drop table atacc1;

-- alter table / alter column [set/drop] not null tests
-- try altering system catalogs, should fail
alter table pg_class alter column relname drop not null;
alter table pg_class alter relname set not null;

-- try altering non-existent table, should fail
alter table non_existent alter column bar set not null;
alter table non_existent alter column bar drop not null;

-- test setting columns to null and not null and vice versa
-- test checking for null values and primary key
create table atacc1 (test int not null) with oids;
alter table atacc1 add constraint "atacc1_pkey" primary key (test);
alter table atacc1 alter column test drop not null;
alter table atacc1 drop constraint "atacc1_pkey";
alter table atacc1 alter column test drop not null;
insert into atacc1 values (null);
alter table atacc1 alter test set not null;
delete from atacc1;
alter table atacc1 alter test set not null;

-- try altering a non-existent column, should fail
alter table atacc1 alter bar set not null;
alter table atacc1 alter bar drop not null;

-- try altering the oid column, should fail
alter table atacc1 alter oid set not null;
alter table atacc1 alter oid drop not null;

-- try creating a view and altering that, should fail
create view myview as select * from atacc1;
alter table myview alter column test drop not null;
alter table myview alter column test set not null;
drop view myview;

drop table atacc1;

-- test inheritance
create table parent (a int);
create table child (b varchar(255)) inherits (parent);

alter table parent alter a set not null;
insert into parent values (NULL);
insert into child (a, b) values (NULL, 'foo');
alter table parent alter a drop not null;
insert into parent values (NULL);
insert into child (a, b) values (NULL, 'foo');
alter table only parent alter a set not null;
alter table child alter a set not null;
delete from parent;
alter table only parent alter a set not null;
insert into parent values (NULL);
alter table child alter a set not null;
insert into child (a, b) values (NULL, 'foo');
delete from child;
alter table child alter a set not null;
insert into child (a, b) values (NULL, 'foo');
drop table child;
drop table parent;

-- test setting and removing default values
create table def_test (
	c1	int4 default 5,
	c2	text default 'initial_default'
);
insert into def_test default values;
alter table def_test alter column c1 drop default;
insert into def_test default values;
alter table def_test alter column c2 drop default;
insert into def_test default values;
alter table def_test alter column c1 set default 10;
alter table def_test alter column c2 set default 'new_default';
insert into def_test default values;
select * from def_test;

-- set defaults to an incorrect type: this should fail
alter table def_test alter column c1 set default 'wrong_datatype';
alter table def_test alter column c2 set default 20;

-- set defaults on a non-existent column: this should fail
alter table def_test alter column c3 set default 30;

-- set defaults on views: we need to create a view, add a rule
-- to allow insertions into it, and then alter the view to add
-- a default
create view def_view_test as select * from def_test;
create rule def_view_test_ins as
	on insert to def_view_test
	do instead insert into def_test select new.*;
insert into def_view_test default values;
alter table def_view_test alter column c1 set default 45;
insert into def_view_test default values;
alter table def_view_test alter column c2 set default 'view_default';
insert into def_view_test default values;
select * from def_view_test;

drop rule def_view_test_ins on def_view_test;
drop view def_view_test;
drop table def_test;

-- alter table / drop column tests
-- try altering system catalogs, should fail
alter table pg_class drop column relname;

-- try altering non-existent table, should fail
alter table nosuchtable drop column bar;

-- test dropping columns
create table atacc1 (a int4 not null, b int4, c int4 not null, d int4) with oids;
insert into atacc1 values (1, 2, 3, 4);
alter table atacc1 drop a;
alter table atacc1 drop a;

-- SELECTs
select * from atacc1;
select * from atacc1 order by a;
select * from atacc1 order by "........pg.dropped.1........";
select * from atacc1 group by a;
select * from atacc1 group by "........pg.dropped.1........";
select atacc1.* from atacc1;
select a from atacc1;
select atacc1.a from atacc1;
select b,c,d from atacc1;
select a,b,c,d from atacc1;
select * from atacc1 where a = 1;
select "........pg.dropped.1........" from atacc1;
select atacc1."........pg.dropped.1........" from atacc1;
select "........pg.dropped.1........",b,c,d from atacc1;
select * from atacc1 where "........pg.dropped.1........" = 1;

-- UPDATEs
update atacc1 set a = 3;
update atacc1 set b = 2 where a = 3;
update atacc1 set "........pg.dropped.1........" = 3;
update atacc1 set b = 2 where "........pg.dropped.1........" = 3;

-- INSERTs
insert into atacc1 values (10, 11, 12, 13);
insert into atacc1 values (default, 11, 12, 13);
insert into atacc1 values (11, 12, 13);
insert into atacc1 (a) values (10);
insert into atacc1 (a) values (default);
insert into atacc1 (a,b,c,d) values (10,11,12,13);
insert into atacc1 (a,b,c,d) values (default,11,12,13);
insert into atacc1 (b,c,d) values (11,12,13);
insert into atacc1 ("........pg.dropped.1........") values (10);
insert into atacc1 ("........pg.dropped.1........") values (default);
insert into atacc1 ("........pg.dropped.1........",b,c,d) values (10,11,12,13);
insert into atacc1 ("........pg.dropped.1........",b,c,d) values (default,11,12,13);

-- DELETEs
delete from atacc1 where a = 3;
delete from atacc1 where "........pg.dropped.1........" = 3;
delete from atacc1;

-- try dropping a non-existent column, should fail
alter table atacc1 drop bar;

-- try dropping the oid column, should succeed
alter table atacc1 drop oid;

-- try dropping the xmin column, should fail
alter table atacc1 drop xmin;

-- try creating a view and altering that, should fail
create view myview as select * from atacc1;
select * from myview;
alter table myview drop d;
drop view myview;

-- test some commands to make sure they fail on the dropped column
analyze atacc1(a);
analyze atacc1("........pg.dropped.1........");
vacuum analyze atacc1(a);
vacuum analyze atacc1("........pg.dropped.1........");
comment on column atacc1.a is 'testing';
comment on column atacc1."........pg.dropped.1........" is 'testing';
alter table atacc1 alter a set storage plain;
alter table atacc1 alter "........pg.dropped.1........" set storage plain;
alter table atacc1 alter a set statistics 0;
alter table atacc1 alter "........pg.dropped.1........" set statistics 0;
alter table atacc1 alter a set default 3;
alter table atacc1 alter "........pg.dropped.1........" set default 3;
alter table atacc1 alter a drop default;
alter table atacc1 alter "........pg.dropped.1........" drop default;
alter table atacc1 alter a set not null;
alter table atacc1 alter "........pg.dropped.1........" set not null;
alter table atacc1 alter a drop not null;
alter table atacc1 alter "........pg.dropped.1........" drop not null;
alter table atacc1 rename a to x;
alter table atacc1 rename "........pg.dropped.1........" to x;
alter table atacc1 add primary key(a);
alter table atacc1 add primary key("........pg.dropped.1........");
alter table atacc1 add unique(a);
alter table atacc1 add unique("........pg.dropped.1........");
alter table atacc1 add check (a > 3);
alter table atacc1 add check ("........pg.dropped.1........" > 3);
create table atacc2 (id int4 unique);
alter table atacc1 add foreign key (a) references atacc2(id);
alter table atacc1 add foreign key ("........pg.dropped.1........") references atacc2(id);
alter table atacc2 add foreign key (id) references atacc1(a);
alter table atacc2 add foreign key (id) references atacc1("........pg.dropped.1........");
drop table atacc2;
create index "testing_idx" on atacc1(a);
create index "testing_idx" on atacc1("........pg.dropped.1........");

-- test create as and select into
insert into atacc1 values (21, 22, 23);
create table test1 as select * from atacc1;
select * from test1;
drop table test1;
select * into test2 from atacc1;
select * from test2;
drop table test2;