*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/commands/indexcmds.c,v 1.95 2002/12/15 16:17:39 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/commands/indexcmds.c,v 1.96 2003/01/02 19:29:22 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "catalog/catalog.h"
#include "catalog/catname.h"
#include "catalog/dependency.h"
+#include "catalog/heap.h"
#include "catalog/index.h"
#include "catalog/namespace.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_proc.h"
#include "commands/defrem.h"
+#include "commands/tablecmds.h"
#include "executor/executor.h"
#include "miscadmin.h"
#include "optimizer/clauses.h"
}
/*
+ * Check that all of the attributes in a primary key are marked
+ * as not null, otherwise attempt to ALTER TABLE .. SET NOT NULL
+ */
+ if (primary && !IsFuncIndex(attributeList))
+ {
+ List *keys;
+
+ foreach(keys, attributeList)
+ {
+ IndexElem *key = (IndexElem *) lfirst(keys);
+ HeapTuple atttuple;
+
+ /* System attributes are never null, so no problem */
+ if (SystemAttributeByName(key->name, rel->rd_rel->relhasoids))
+ continue;
+
+ atttuple = SearchSysCacheAttName(relationId, key->name);
+ if (HeapTupleIsValid(atttuple))
+ {
+ if (! ((Form_pg_attribute) GETSTRUCT(atttuple))->attnotnull)
+ {
+ /*
+ * Try to make it NOT NULL.
+ *
+ * XXX: Shouldn't the ALTER TABLE .. SET NOT NULL cascade
+ * to child tables? Currently, since the PRIMARY KEY
+ * itself doesn't cascade, we don't cascade the notnull
+ * constraint either; but this is pretty debatable.
+ */
+ AlterTableAlterColumnSetNotNull(relationId, false,
+ key->name);
+ }
+ ReleaseSysCache(atttuple);
+ }
+ else
+ {
+ /* This shouldn't happen if parser did its job ... */
+ elog(ERROR, "DefineIndex: column \"%s\" named in key does not exist",
+ key->name);
+ }
+ }
+ }
+
+ /*
* Prepare arguments for index_create, primarily an IndexInfo
* structure
*/
tuple = SearchSysCacheAttName(relId, arg);
if (!HeapTupleIsValid(tuple))
- elog(ERROR, "DefineIndex: attribute \"%s\" not found", arg);
+ elog(ERROR, "DefineIndex: column \"%s\" named in key does not exist", arg);
att = (Form_pg_attribute) GETSTRUCT(tuple);
indexInfo->ii_KeyAttrNumbers[nargs] = att->attnum;
argTypes[nargs] = att->atttypid;
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.258 2002/12/17 01:18:29 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.259 2003/01/02 19:29:22 tgl Exp $
*
*-------------------------------------------------------------------------
*/
/*
* Make sure referenced keys exist. If we are making a PRIMARY
- * KEY index, also make sure they are NOT NULL.
+ * KEY index, also make sure they are NOT NULL, if possible.
+ * (Although we could leave it to DefineIndex to mark the columns NOT
+ * NULL, it's more efficient to get it right the first time.)
*/
foreach(keys, constraint->keys)
{
if (strcmp(key, inhname) == 0)
{
found = true;
-
/*
- * If the column is inherited, we currently
- * have no easy way to force it to be NOT
- * NULL. Only way I can see to fix this would
- * be to convert the inherited-column info to
- * ColumnDef nodes before we reach this point,
- * and then create the table from those nodes
- * rather than referencing the parent tables
- * later. That would likely be cleaner, but
- * too much work to contemplate right now.
- * Instead, raise an error if the inherited
- * column won't be NOT NULL. (Would a WARNING
- * be more reasonable?)
+ * We currently have no easy way to force an
+ * inherited column to be NOT NULL at creation, if
+ * its parent wasn't so already. We leave it to
+ * DefineIndex to fix things up in this case.
*/
- if (constraint->contype == CONSTR_PRIMARY &&
- !inhattr->attnotnull)
- elog(ERROR, "inherited attribute \"%s\" cannot be a PRIMARY KEY because it is not marked NOT NULL",
- inhname);
break;
}
}
if (HeapTupleIsValid(atttuple))
{
found = true;
-
/*
- * We require pre-existing column to be already marked
- * NOT NULL.
+ * If it's not already NOT NULL, leave it to DefineIndex
+ * to fix later.
*/
- if (constraint->contype == CONSTR_PRIMARY &&
- !((Form_pg_attribute) GETSTRUCT(atttuple))->attnotnull)
- elog(ERROR, "Existing attribute \"%s\" cannot be a PRIMARY KEY because it is not marked NOT NULL",
- key);
ReleaseSysCache(atttuple);
}
}
create table atacc1 ( test int );
-- add a primary key constraint
alter table atacc1 add constraint atacc_test1 primary key (test);
-ERROR: Existing attribute "test" cannot be a PRIMARY KEY because it is not marked NOT NULL
+NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index 'atacc_test1' for table 'atacc1'
-- insert first value
insert into atacc1 (test) values (2);
-- should fail
insert into atacc1 (test) values (2);
+ERROR: Cannot insert a duplicate key into unique index atacc_test1
-- should succeed
insert into atacc1 (test) values (4);
-- inserting NULL should fail
insert into atacc1 (test) values(NULL);
--- try adding a primary key oid constraint
+ERROR: ExecInsert: Fail to add null value in not null attribute test
+-- try adding a second primary key (should fail)
+alter table atacc1 add constraint atacc_oid1 primary key(oid);
+ERROR: ALTER TABLE / PRIMARY KEY multiple primary keys for table 'atacc1' are not allowed
+-- 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);
NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index 'atacc_oid1' for table 'atacc1'
drop table atacc1;
insert into atacc1 (test) values (2);
-- add a primary key (fails)
alter table atacc1 add constraint atacc_test1 primary key (test);
-ERROR: Existing attribute "test" cannot be a PRIMARY KEY because it is not marked NOT NULL
+NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index 'atacc_test1' for table 'atacc1'
+ERROR: Cannot create unique index. Table contains non-unique values
insert into atacc1 (test) values (3);
drop table atacc1;
-- let's do another one where the primary key constraint fails when added
insert into atacc1 (test) values (NULL);
-- add a primary key (fails)
alter table atacc1 add constraint atacc_test1 primary key (test);
-ERROR: Existing attribute "test" cannot be a PRIMARY KEY because it is not marked NOT NULL
+NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index 'atacc_test1' for table 'atacc1'
+ERROR: ALTER TABLE: Attribute "test" contains NULL values
insert into atacc1 (test) values (3);
drop table atacc1;
-- let's do one where the primary key constraint fails
create table atacc1 ( test int, test2 int);
-- add a primary key constraint
alter table atacc1 add constraint atacc_test1 primary key (test, test2);
-ERROR: Existing attribute "test" cannot be a PRIMARY KEY because it is not marked NOT NULL
+NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index 'atacc_test1' for table 'atacc1'
-- try adding a second primary key - should fail
alter table atacc1 add constraint atacc_test2 primary key (test);
-ERROR: Existing attribute "test" cannot be a PRIMARY KEY because it is not marked NOT NULL
+ERROR: ALTER TABLE / PRIMARY KEY multiple primary keys for table 'atacc1' are not allowed
-- insert initial value
insert into atacc1 (test,test2) values (4,4);
-- should fail
insert into atacc1 (test,test2) values (4,4);
+ERROR: Cannot insert a duplicate key into unique index atacc_test1
insert into atacc1 (test,test2) values (NULL,3);
+ERROR: ExecInsert: Fail to add null value in not null attribute test
insert into atacc1 (test,test2) values (3, NULL);
+ERROR: ExecInsert: Fail to add null value in not null attribute test2
insert into atacc1 (test,test2) values (NULL,NULL);
+ERROR: ExecInsert: Fail to add null value in not null attribute test
-- should all succeed
insert into atacc1 (test,test2) values (4,5);
insert into atacc1 (test,test2) values (5,4);
---------+----+----+----+----
(0 rows)
+-- Confirm PRIMARY KEY adds NOT NULL constraint to child table
+CREATE TEMP TABLE z (b TEXT, PRIMARY KEY(aa, b)) inherits (a);
+NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index 'z_pkey' for table 'z'
+INSERT INTO z VALUES (NULL, 'text'); -- should fail
+ERROR: ExecInsert: Fail to add null value in not null attribute aa
insert into atacc1 (test) values (4);
-- inserting NULL should fail
insert into atacc1 (test) values(NULL);
--- try adding a primary key oid constraint
+-- 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;
SELECT relname, b.* FROM ONLY b, pg_class where b.tableoid = pg_class.oid;
SELECT relname, c.* FROM ONLY c, pg_class where c.tableoid = pg_class.oid;
SELECT relname, d.* FROM ONLY d, pg_class where d.tableoid = pg_class.oid;
+
+-- Confirm PRIMARY KEY adds NOT NULL constraint to child table
+CREATE TEMP TABLE z (b TEXT, PRIMARY KEY(aa, b)) inherits (a);
+INSERT INTO z VALUES (NULL, 'text'); -- should fail
OSDN Git Service
