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Commite2d156f

Browse files
committed
Add attisinherited column to pg_attribute; use it to guard against
column additions, deletions, and renames that would let a child tableget out of sync with its parent. Patch by Alvaro Herrera, with somekibitzing by Tom Lane.
1 parent96fd719 commite2d156f

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18 files changed

+492
-330
lines changed

18 files changed

+492
-330
lines changed

‎doc/src/sgml/catalogs.sgml‎

Lines changed: 11 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,6 @@
11
<!--
22
Documentation of the system catalogs, directed toward PostgreSQL developers
3-
$Header: /cvsroot/pgsql/doc/src/sgml/catalogs.sgml,v 2.55 2002/08/28 15:02:55 tgl Exp $
3+
$Header: /cvsroot/pgsql/doc/src/sgml/catalogs.sgml,v 2.56 2002/08/30 19:23:18 tgl Exp $
44
-->
55

66
<chapter id="catalogs">
@@ -821,6 +821,16 @@
821821
</entry>
822822
</row>
823823

824+
<row>
825+
<entry>attisinherited</entry>
826+
<entry><type>bool</type></entry>
827+
<entry></entry>
828+
<entry>
829+
This column is inherited from some other relation. An inherited
830+
column cannot be dropped nor renamed.
831+
</entry>
832+
</row>
833+
824834
</tbody>
825835
</tgroup>
826836
</table>

‎src/backend/access/common/tupdesc.c‎

Lines changed: 12 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/access/common/tupdesc.c,v 1.86 2002/08/29 00:17:02 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/access/common/tupdesc.c,v 1.87 2002/08/30 19:23:18 tgl Exp $
1212
*
1313
* NOTES
1414
* some of the executor utility code such as "ExecTypeFromTL" should be
@@ -231,6 +231,9 @@ FreeTupleDesc(TupleDesc tupdesc)
231231

232232
}
233233

234+
/*
235+
* Compare two TupleDesc structures for logical equality
236+
*/
234237
bool
235238
equalTupleDescs(TupleDesctupdesc1,TupleDesctupdesc2)
236239
{
@@ -264,8 +267,12 @@ equalTupleDescs(TupleDesc tupdesc1, TupleDesc tupdesc2)
264267
return false;
265268
if (attr1->attnotnull!=attr2->attnotnull)
266269
return false;
270+
if (attr1->atthasdef!=attr2->atthasdef)
271+
return false;
267272
if (attr1->attisdropped!=attr2->attisdropped)
268273
return false;
274+
if (attr1->attisinherited!=attr2->attisinherited)
275+
return false;
269276
}
270277
if (tupdesc1->constr!=NULL)
271278
{
@@ -389,6 +396,7 @@ TupleDescInitEntry(TupleDesc desc,
389396
att->attnotnull= false;
390397
att->atthasdef= false;
391398
att->attisdropped= false;
399+
att->attisinherited= false;
392400

393401
tuple=SearchSysCache(TYPEOID,
394402
ObjectIdGetDatum(oidtypeid),
@@ -514,7 +522,7 @@ BuildDescForRelation(List *schema)
514522
typenameTypeId(entry->typename),
515523
atttypmod,attdim,attisset);
516524

517-
/*This is for constraints */
525+
/*Fill in additional stuff not handled by TupleDescInitEntry */
518526
if (entry->is_not_null)
519527
constr->has_not_null= true;
520528
desc->attrs[attnum-1]->attnotnull=entry->is_not_null;
@@ -533,7 +541,9 @@ BuildDescForRelation(List *schema)
533541
desc->attrs[attnum-1]->atthasdef= true;
534542
}
535543

544+
desc->attrs[attnum-1]->attisinherited=entry->is_inherited;
536545
}
546+
537547
if (constr->has_not_null||ndef>0)
538548
{
539549
desc->constr=constr;

‎src/backend/catalog/index.c‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/catalog/index.c,v 1.191 2002/08/29 15:56:19 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/catalog/index.c,v 1.192 2002/08/30 19:23:18 tgl Exp $
1212
*
1313
*
1414
* INTERFACE ROUTINES
@@ -259,6 +259,7 @@ ConstructTupleDescriptor(Relation heapRelation,
259259
to->attcacheoff=-1;
260260
to->attnotnull= false;
261261
to->atthasdef= false;
262+
to->attisinherited= false;
262263

263264
/*
264265
* We do not yet have the correct relation OID for the index, so

‎src/backend/commands/sequence.c‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/commands/sequence.c,v 1.84 2002/08/06 02:36:34 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/commands/sequence.c,v 1.85 2002/08/30 19:23:19 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -127,6 +127,7 @@ DefineSequence(CreateSeqStmt *seq)
127127

128128
coldef=makeNode(ColumnDef);
129129
coldef->typename=typnam;
130+
coldef->is_inherited= false;
130131
coldef->is_not_null= true;
131132
coldef->raw_default=NULL;
132133
coldef->cooked_default=NULL;

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