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Commit6c91eef

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committed
Fix handling of pg_type.typdefault per bug report from Dave Blasby.
If there's anyone out there who's actually using datatype-defineddefault values, this will be an incompatible change in behavior ...but the old behavior was so broken that I doubt anyone was using it.
1 parentf2b604e commit6c91eef

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11 files changed

+209
-146
lines changed

11 files changed

+209
-146
lines changed

‎doc/src/sgml/catalogs.sgml

Lines changed: 9 additions & 3 deletions
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 2.22 2001/08/26 16:55:58 tgl Exp $
3+
$Header: /cvsroot/pgsql/doc/src/sgml/catalogs.sgml,v 2.23 2001/09/06 02:07:41 tgl Exp $
44
-->
55

66
<chapter id="catalogs">
@@ -243,7 +243,9 @@
243243
<entry></entry>
244244
<entry>
245245
The initial value of the transition state. This is a text
246-
field which will be cast to the type of aggtranstype.
246+
field containing the initial value in its external string
247+
representation. If the field is NULL, the transition state
248+
value starts out NULL.
247249
</entry>
248250
</row>
249251
</tbody>
@@ -2071,7 +2073,11 @@
20712073
<entry>typdefault</entry>
20722074
<entry><type>text</type></entry>
20732075
<entry></entry>
2074-
<entry>???</entry>
2076+
<entry><para>
2077+
<structfield>typdefault</structfield> is NULL for types without a
2078+
default value. If it's not NULL, it contains the external string
2079+
representation of the type's default value.
2080+
</para></entry>
20752081
</row>
20762082
</tbody>
20772083
</tgroup>

‎src/backend/catalog/heap.c

Lines changed: 8 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.175 2001/08/25 18:52:41 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.176 2001/09/06 02:07:42 tgl Exp $
1212
*
1313
*
1414
* INTERFACE ROUTINES
@@ -657,7 +657,6 @@ AddNewRelationTuple(Relation pg_class_desc,
657657
staticvoid
658658
AddNewRelationType(char*typeName,Oidnew_rel_oid,Oidnew_type_oid)
659659
{
660-
661660
/*
662661
* The sizes are set to oid size because it makes implementing sets
663662
* MUCH easier, and no one (we hope) uses these fields to figure out
@@ -666,24 +665,22 @@ AddNewRelationType(char *typeName, Oid new_rel_oid, Oid new_type_oid)
666665
* actually get is the oid of a tuple in the pg_proc catalog, so the
667666
* size of the "set" is the size of an oid. Similarly, byval being
668667
* true makes sets much easier, and it isn't used by anything else.
669-
*
670-
* XXX Note the assumption that OIDs are the same size as int4s.
671668
*/
672669
TypeCreate(typeName,/* type name */
673670
new_type_oid,/* preassigned oid for type */
674671
new_rel_oid,/* relation oid */
675672
sizeof(Oid),/* internal size */
676-
sizeof(Oid),/* external size */
673+
-1,/* external size */
677674
'c',/* type-type (catalog) */
678675
',',/* default array delimiter */
679-
"int4in",/* input procedure */
680-
"int4out",/* output procedure */
681-
"int4in",/* receive procedure */
682-
"int4out",/* send procedure */
676+
"oidin",/* input procedure */
677+
"oidout",/* output procedure */
678+
"oidin",/* receive procedure */
679+
"oidout",/* send procedure */
683680
NULL,/* array element type - irrelevant */
684-
"-",/* default type value */
681+
NULL,/* default type value - none */
685682
true,/* passed by value */
686-
'i',/* default alignment */
683+
'i',/* default alignment- same as for OID*/
687684
'p');/* Not TOASTable */
688685
}
689686

‎src/backend/catalog/pg_type.c

Lines changed: 21 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/catalog/pg_type.c,v 1.62 2001/08/10 15:49:39 petere Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/catalog/pg_type.c,v 1.63 2001/09/06 02:07:42 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -51,7 +51,7 @@ TypeGetWithOpenRelation(Relation pg_type_desc,
5151
/*
5252
* initialize the scan key and begin a scan of pg_type
5353
*/
54-
ScanKeyEntryInitialize(typeKey,
54+
ScanKeyEntryInitialize(&typeKey[0],
5555
0,
5656
Anum_pg_type_typname,
5757
F_NAMEEQ,
@@ -318,10 +318,18 @@ TypeCreate(char *typeName,
318318
}
319319

320320
/*
321-
* XXX comment me
321+
* validate size specifications: either positive (fixed-length) or
322+
* -1 (variable-length).
322323
*/
323-
if (externalSize==0)
324-
externalSize=-1;/* variable length */
324+
if (! (internalSize>0||internalSize==-1))
325+
elog(ERROR,"TypeCreate: invalid type internal size %d",
326+
internalSize);
327+
if (! (externalSize>0||externalSize==-1))
328+
elog(ERROR,"TypeCreate: invalid type external size %d",
329+
externalSize);
330+
331+
if (internalSize!=-1&&storage!='p')
332+
elog(ERROR,"TypeCreate: fixed size types must have storage PLAIN");
325333

326334
/*
327335
* initialize arrays needed by FormHeapTuple
@@ -330,20 +338,9 @@ TypeCreate(char *typeName,
330338
{
331339
nulls[i]=' ';
332340
replaces[i]='r';
333-
values[i]= (Datum)NULL;/* redundant, but nice */
341+
values[i]= (Datum)0;
334342
}
335343

336-
/*
337-
* XXX
338-
*
339-
* Do this so that user-defined types have size -1 instead of zero if
340-
* they are variable-length - this is so that everything else in the
341-
* backend works.
342-
*/
343-
344-
if (internalSize==0)
345-
internalSize=-1;
346-
347344
/*
348345
* initialize the *values information
349346
*/
@@ -435,15 +432,19 @@ TypeCreate(char *typeName,
435432
/*
436433
* initialize the default value for this type.
437434
*/
438-
values[i]=DirectFunctionCall1(textin,/* 17 */
439-
CStringGetDatum(defaultTypeValue ?defaultTypeValue :"-"));
435+
if (defaultTypeValue)
436+
values[i]=DirectFunctionCall1(textin,
437+
CStringGetDatum(defaultTypeValue));
438+
else
439+
nulls[i]='n';
440+
i++;/* 17 */
440441

441442
/*
442443
* open pg_type and begin a scan for the type name.
443444
*/
444445
pg_type_desc=heap_openr(TypeRelationName,RowExclusiveLock);
445446

446-
ScanKeyEntryInitialize(typeKey,
447+
ScanKeyEntryInitialize(&typeKey[0],
447448
0,
448449
Anum_pg_type_typname,
449450
F_NAMEEQ,

‎src/backend/commands/define.c

Lines changed: 9 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@
1010
*
1111
*
1212
* IDENTIFICATION
13-
* $Header: /cvsroot/pgsql/src/backend/commands/define.c,v 1.58 2001/08/03 20:47:40 tgl Exp $
13+
* $Header: /cvsroot/pgsql/src/backend/commands/define.c,v 1.59 2001/09/06 02:07:42 tgl Exp $
1414
*
1515
* DESCRIPTION
1616
* The "DefineFoo" routines take the parse tree and pick out the
@@ -535,31 +535,29 @@ DefineAggregate(char *aggName, List *parameters)
535535
void
536536
DefineType(char*typeName,List*parameters)
537537
{
538-
int16internalLength=0;/* int2 */
539-
int16externalLength=0;/* int2 */
538+
int16internalLength=-1;/* int2 */
539+
int16externalLength=-1;/* int2 */
540540
char*elemName=NULL;
541541
char*inputName=NULL;
542542
char*outputName=NULL;
543543
char*sendName=NULL;
544544
char*receiveName=NULL;
545-
char*defaultValue=NULL;/* Datum */
545+
char*defaultValue=NULL;
546546
boolbyValue= false;
547547
chardelimiter=DEFAULT_TYPDELIM;
548548
char*shadow_type;
549549
List*pl;
550550
charalignment='i';/* default alignment */
551-
charstorage='p';/* default storagein TOAST */
551+
charstorage='p';/* defaultTOASTstoragemethod */
552552

553553
/*
554554
* Type names must be one character shorter than other names, allowing
555555
* room to create the corresponding array type name with prepended
556556
* "_".
557557
*/
558558
if (strlen(typeName)> (NAMEDATALEN-2))
559-
{
560559
elog(ERROR,"DefineType: type names must be %d characters or less",
561560
NAMEDATALEN-2);
562-
}
563561

564562
foreach(pl,parameters)
565563
{
@@ -645,9 +643,6 @@ DefineType(char *typeName, List *parameters)
645643
if (outputName==NULL)
646644
elog(ERROR,"Define: \"output\" unspecified");
647645

648-
if (internalLength!=-1&&storage!='p')
649-
elog(ERROR,"Define: fixed size types must have storage PLAIN");
650-
651646
/*
652647
* now have TypeCreate do all the real work.
653648
*/
@@ -674,6 +669,9 @@ DefineType(char *typeName, List *parameters)
674669
*/
675670
shadow_type=makeArrayTypeName(typeName);
676671

672+
/* alignment must be 'i' or 'd' for arrays */
673+
alignment= (alignment=='d') ?'d' :'i';
674+
677675
TypeCreate(shadow_type,/* type name */
678676
InvalidOid,/* preassigned type oid (not done here) */
679677
InvalidOid,/* relation oid (n/a here) */
@@ -688,7 +686,7 @@ DefineType(char *typeName, List *parameters)
688686
typeName,/* element type name */
689687
NULL,/* never a default type value */
690688
false,/* never passed by value */
691-
alignment,/*NB: must be 'i' or 'd' for arrays... */
689+
alignment,/*see above */
692690
'x');/* ARRAY is always toastable */
693691

694692
pfree(shadow_type);

‎src/backend/optimizer/prep/preptlist.c

Lines changed: 36 additions & 27 deletions
Original file line numberDiff line numberDiff line change
@@ -15,7 +15,7 @@
1515
* Portions Copyright (c) 1994, Regents of the University of California
1616
*
1717
* IDENTIFICATION
18-
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/preptlist.c,v 1.42 2001/03/22 03:59:38 momjian Exp $
18+
* $Header: /cvsroot/pgsql/src/backend/optimizer/prep/preptlist.c,v 1.43 2001/09/06 02:07:42 tgl Exp $
1919
*
2020
*-------------------------------------------------------------------------
2121
*/
@@ -192,45 +192,54 @@ expand_targetlist(List *tlist, int command_type,
192192
{
193193
caseCMD_INSERT:
194194
{
195-
Datumtypedefault=get_typdefault(atttype);
196-
inttyplen;
197-
Const*temp_const;
195+
boolhasdefault;
196+
Datumtypedefault;
197+
int16typlen;
198+
booltypbyval;
199+
Const*def_const;
198200

199-
#ifdef_DROP_COLUMN_HACK__
200-
if (COLUMN_IS_DROPPED(att_tup))
201-
typedefault=PointerGetDatum(NULL);
202-
#endif/* _DROP_COLUMN_HACK__ */
203-
204-
if (typedefault==PointerGetDatum(NULL))
205-
typlen=0;
206-
else
201+
if (att_tup->attisset)
207202
{
208-
209203
/*
210-
*Since this is an append or replace, the
211-
*size of any setattribute is the size of
212-
* theOID used to represent it.
204+
*Set attributes are represented as OIDs no
205+
*matter what the setelement type is, and
206+
* theelement type's default is irrelevant too.
213207
*/
214-
if (att_tup->attisset)
215-
typlen=get_typlen(OIDOID);
208+
hasdefault= false;
209+
typedefault= (Datum)0;
210+
typlen=sizeof(Oid);
211+
typbyval= true;
212+
}
213+
else
214+
{
215+
#ifdef_DROP_COLUMN_HACK__
216+
if (COLUMN_IS_DROPPED(att_tup))
217+
{
218+
hasdefault= false;
219+
typedefault= (Datum)0;
220+
}
216221
else
217-
typlen=get_typlen(atttype);
222+
#endif/* _DROP_COLUMN_HACK__ */
223+
hasdefault=get_typdefault(atttype,
224+
&typedefault);
225+
226+
get_typlenbyval(atttype,&typlen,&typbyval);
218227
}
219228

220-
temp_const=makeConst(atttype,
221-
typlen,
222-
typedefault,
223-
(typedefault==PointerGetDatum(NULL)),
224-
false,
225-
false,/* not a set */
226-
false);
229+
def_const=makeConst(atttype,
230+
typlen,
231+
typedefault,
232+
!hasdefault,
233+
typbyval,
234+
false,/* not a set */
235+
false);
227236

228237
new_tle=makeTargetEntry(makeResdom(attrno,
229238
atttype,
230239
-1,
231240
pstrdup(attrname),
232241
false),
233-
(Node*)temp_const);
242+
(Node*)def_const);
234243
break;
235244
}
236245
caseCMD_UPDATE:

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