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Commit527f0ae

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Department of second thoughts: let's show the exact key during unique index
build failures, too. Refactor a bit more since that error message isn'tspelled the same.
1 parentb680ae4 commit527f0ae

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6 files changed

+44
-30
lines changed

6 files changed

+44
-30
lines changed

‎src/backend/access/index/genam.c

Lines changed: 19 additions & 19 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/access/index/genam.c,v 1.75 2009/08/0119:59:41 tgl Exp $
11+
* $PostgreSQL: pgsql/src/backend/access/index/genam.c,v 1.76 2009/08/0120:59:17 tgl Exp $
1212
*
1313
* NOTES
1414
* many of the old access method routines have been turned into
@@ -133,13 +133,16 @@ IndexScanEnd(IndexScanDesc scan)
133133
}
134134

135135
/*
136-
*ReportUniqueViolation -- Report a unique-constraint violation.
136+
*BuildIndexValueDescription
137137
*
138-
* The index entry represented by values[]/isnull[] violates the unique
139-
* constraint enforced by this index. Throw a suitable error.
138+
* Construct a string describing the contents of an index entry, in the
139+
* form "(key_name, ...)=(key_value, ...)". This is currently used
140+
* only for building unique-constraint error messages, but we don't want
141+
* to hardwire the spelling of the messages here.
140142
*/
141-
void
142-
ReportUniqueViolation(RelationindexRelation,Datum*values,bool*isnull)
143+
char*
144+
BuildIndexValueDescription(RelationindexRelation,
145+
Datum*values,bool*isnull)
143146
{
144147
/*
145148
* XXX for the moment we use the index's tupdesc as a guide to the
@@ -148,14 +151,14 @@ ReportUniqueViolation(Relation indexRelation, Datum *values, bool *isnull)
148151
* are ever to support non-btree unique indexes.
149152
*/
150153
TupleDesctupdesc=RelationGetDescr(indexRelation);
151-
char*key_names;
152-
StringInfoDatakey_values;
154+
StringInfoDatabuf;
153155
inti;
154156

155-
key_names=pg_get_indexdef_columns(RelationGetRelid(indexRelation), true);
157+
initStringInfo(&buf);
158+
appendStringInfo(&buf,"(%s)=(",
159+
pg_get_indexdef_columns(RelationGetRelid(indexRelation),
160+
true));
156161

157-
/* Get printable versions of the key values */
158-
initStringInfo(&key_values);
159162
for (i=0;i<tupdesc->natts;i++)
160163
{
161164
char*val;
@@ -173,16 +176,13 @@ ReportUniqueViolation(Relation indexRelation, Datum *values, bool *isnull)
173176
}
174177

175178
if (i>0)
176-
appendStringInfoString(&key_values,", ");
177-
appendStringInfoString(&key_values,val);
179+
appendStringInfoString(&buf,", ");
180+
appendStringInfoString(&buf,val);
178181
}
179182

180-
ereport(ERROR,
181-
(errcode(ERRCODE_UNIQUE_VIOLATION),
182-
errmsg("duplicate key value violates unique constraint \"%s\"",
183-
RelationGetRelationName(indexRelation)),
184-
errdetail("Key (%s)=(%s) already exists.",
185-
key_names,key_values.data)));
183+
appendStringInfoChar(&buf,')');
184+
185+
returnbuf.data;
186186
}
187187

188188

‎src/backend/access/nbtree/nbtinsert.c

Lines changed: 9 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtinsert.c,v 1.172 2009/08/0119:59:41 tgl Exp $
11+
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtinsert.c,v 1.173 2009/08/0120:59:17 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -365,7 +365,7 @@ _bt_check_unique(Relation rel, IndexTuple itup, Relation heapRel,
365365
* This is a definite conflict. Break the tuple down
366366
* into datums and report the error. But first, make
367367
* sure we release the buffer locks we're holding ---
368-
*the error reporting code could make catalog accesses,
368+
*BuildIndexValueDescription could make catalog accesses,
369369
* which in the worst case might touch this same index
370370
* and cause deadlocks.
371371
*/
@@ -379,7 +379,13 @@ _bt_check_unique(Relation rel, IndexTuple itup, Relation heapRel,
379379

380380
index_deform_tuple(itup,RelationGetDescr(rel),
381381
values,isnull);
382-
ReportUniqueViolation(rel,values,isnull);
382+
ereport(ERROR,
383+
(errcode(ERRCODE_UNIQUE_VIOLATION),
384+
errmsg("duplicate key value violates unique constraint \"%s\"",
385+
RelationGetRelationName(rel)),
386+
errdetail("Key %s already exists.",
387+
BuildIndexValueDescription(rel,
388+
values,isnull))));
383389
}
384390
}
385391
elseif (all_dead)

‎src/backend/utils/sort/tuplesort.c

Lines changed: 10 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -91,7 +91,7 @@
9191
* Portions Copyright (c) 1994, Regents of the University of California
9292
*
9393
* IDENTIFICATION
94-
* $PostgreSQL: pgsql/src/backend/utils/sort/tuplesort.c,v 1.91 2009/06/11 14:49:06 momjian Exp $
94+
* $PostgreSQL: pgsql/src/backend/utils/sort/tuplesort.c,v 1.92 2009/08/01 20:59:17 tgl Exp $
9595
*
9696
*-------------------------------------------------------------------------
9797
*/
@@ -2801,11 +2801,19 @@ comparetup_index_btree(const SortTuple *a, const SortTuple *b,
28012801
* error in that case.
28022802
*/
28032803
if (state->enforceUnique&& !equal_hasnull&&tuple1!=tuple2)
2804+
{
2805+
Datumvalues[INDEX_MAX_KEYS];
2806+
boolisnull[INDEX_MAX_KEYS];
2807+
2808+
index_deform_tuple(tuple1,tupDes,values,isnull);
28042809
ereport(ERROR,
28052810
(errcode(ERRCODE_UNIQUE_VIOLATION),
28062811
errmsg("could not create unique index \"%s\"",
28072812
RelationGetRelationName(state->indexRel)),
2808-
errdetail("Table contains duplicated values.")));
2813+
errdetail("Key %s is duplicated.",
2814+
BuildIndexValueDescription(state->indexRel,
2815+
values,isnull))));
2816+
}
28092817

28102818
/*
28112819
* If key values are equal, we sort on ItemPointer. This does not affect

‎src/include/access/genam.h

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.80 2009/08/0119:59:41 tgl Exp $
10+
* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.81 2009/08/0120:59:17 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -164,8 +164,8 @@ extern FmgrInfo *index_getprocinfo(Relation irel, AttrNumber attnum,
164164
externIndexScanDescRelationGetIndexScan(RelationindexRelation,
165165
intnkeys,ScanKeykey);
166166
externvoidIndexScanEnd(IndexScanDescscan);
167-
externvoidReportUniqueViolation(RelationindexRelation,
168-
Datum*values,bool*isnull);
167+
externchar*BuildIndexValueDescription(RelationindexRelation,
168+
Datum*values,bool*isnull);
169169

170170
/*
171171
* heap-or-index access to system catalogs (in genam.c)

‎src/test/regress/expected/alter_table.out

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -423,7 +423,7 @@ insert into atacc1 (test) values (2);
423423
alter table atacc1 add constraint atacc_test1 unique (test);
424424
NOTICE: ALTER TABLE / ADD UNIQUE will create implicit index "atacc_test1" for table "atacc1"
425425
ERROR: could not create unique index "atacc_test1"
426-
DETAIL:Table contains duplicated values.
426+
DETAIL:Key (test)=(2) is duplicated.
427427
insert into atacc1 (test) values (3);
428428
drop table atacc1;
429429
-- let's do one where the unique constraint fails
@@ -494,7 +494,7 @@ insert into atacc1 (test) values (2);
494494
alter table atacc1 add constraint atacc_test1 primary key (test);
495495
NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index "atacc_test1" for table "atacc1"
496496
ERROR: could not create unique index "atacc_test1"
497-
DETAIL:Table contains duplicated values.
497+
DETAIL:Key (test)=(2) is duplicated.
498498
insert into atacc1 (test) values (3);
499499
drop table atacc1;
500500
-- let's do another one where the primary key constraint fails when added

‎src/test/regress/expected/create_index.out

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -685,7 +685,7 @@ DETAIL: Key (f1)=(b) already exists.
685685
-- check if constraint is enforced properly at build time
686686
CREATE UNIQUE INDEX CONCURRENTLY concur_index3 ON concur_heap(f2);
687687
ERROR: could not create unique index "concur_index3"
688-
DETAIL:Table contains duplicated values.
688+
DETAIL:Key (f2)=(b) is duplicated.
689689
-- test that expression indexes and partial indexes work concurrently
690690
CREATE INDEX CONCURRENTLY concur_index4 on concur_heap(f2) WHERE f1='a';
691691
CREATE INDEX CONCURRENTLY concur_index5 on concur_heap(f2) WHERE f1='x';

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