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Commitbc2d716

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Fix ruleutils.c for domain-over-array cases, too.
Further investigation shows that ruleutils isn't quite up to speed eitherfor cases where we have a domain-over-array: it needs to be prepared tolook past a CoerceToDomain at the top level of field and elementassignments, else it decompiles them incorrectly. Potentially this wouldresult in failure to dump/reload a rule, if it looked like the one in thenew test case. (I also added a test for EXPLAIN; that output isn't broken,but clearly we need more test coverage here.)Like commitb1cb32f, this bug is reachable in cases we already support,so back-patch all the way.
1 parentda11977 commitbc2d716

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3 files changed

+81
-12
lines changed

3 files changed

+81
-12
lines changed

‎src/backend/utils/adt/ruleutils.c

Lines changed: 37 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -6206,8 +6206,11 @@ get_update_query_targetlist_def(Query *query, List *targetList,
62066206
/*
62076207
* We must dig down into the expr to see if it's a PARAM_MULTIEXPR
62086208
* Param. That could be buried under FieldStores and ArrayRefs
6209-
* (cf processIndirection()), and underneath those there could be
6210-
* an implicit type coercion.
6209+
* and CoerceToDomains (cf processIndirection()), and underneath
6210+
* those there could be an implicit type coercion. Because we
6211+
* would ignore implicit type coercions anyway, we don't need to
6212+
* be as careful as processIndirection() is about descending past
6213+
* implicit CoerceToDomains.
62116214
*/
62126215
expr= (Node*)tle->expr;
62136216
while (expr)
@@ -6226,6 +6229,14 @@ get_update_query_targetlist_def(Query *query, List *targetList,
62266229
break;
62276230
expr= (Node*)aref->refassgnexpr;
62286231
}
6232+
elseif (IsA(expr,CoerceToDomain))
6233+
{
6234+
CoerceToDomain*cdomain= (CoerceToDomain*)expr;
6235+
6236+
if (cdomain->coercionformat!=COERCE_IMPLICIT_CAST)
6237+
break;
6238+
expr= (Node*)cdomain->arg;
6239+
}
62296240
else
62306241
break;
62316242
}
@@ -10185,13 +10196,17 @@ get_opclass_name(Oid opclass, Oid actual_datatype,
1018510196
*
1018610197
* We strip any top-level FieldStore or assignment ArrayRef nodes that
1018710198
* appear in the input, printing them as decoration for the base column
10188-
* name (which we assume the caller just printed). Return the subexpression
10189-
* that's to be assigned.
10199+
* name (which we assume the caller just printed). We might also need to
10200+
* strip CoerceToDomain nodes, but only ones that appear above assignment
10201+
* nodes.
10202+
*
10203+
* Returns the subexpression that's to be assigned.
1019010204
*/
1019110205
staticNode*
1019210206
processIndirection(Node*node,deparse_context*context)
1019310207
{
1019410208
StringInfobuf=context->buf;
10209+
CoerceToDomain*cdomain=NULL;
1019510210

1019610211
for (;;)
1019710212
{
@@ -10239,10 +10254,28 @@ processIndirection(Node *node, deparse_context *context)
1023910254
*/
1024010255
node= (Node*)aref->refassgnexpr;
1024110256
}
10257+
elseif (IsA(node,CoerceToDomain))
10258+
{
10259+
cdomain= (CoerceToDomain*)node;
10260+
/* If it's an explicit domain coercion, we're done */
10261+
if (cdomain->coercionformat!=COERCE_IMPLICIT_CAST)
10262+
break;
10263+
/* Tentatively descend past the CoerceToDomain */
10264+
node= (Node*)cdomain->arg;
10265+
}
1024210266
else
1024310267
break;
1024410268
}
1024510269

10270+
/*
10271+
* If we descended past a CoerceToDomain whose argument turned out not to
10272+
* be a FieldStore or array assignment, back up to the CoerceToDomain.
10273+
* (This is not enough to be fully correct if there are nested implicit
10274+
* CoerceToDomains, but such cases shouldn't ever occur.)
10275+
*/
10276+
if (cdomain&&node== (Node*)cdomain->arg)
10277+
node= (Node*)cdomain;
10278+
1024610279
returnnode;
1024710280
}
1024810281

‎src/test/regress/expected/domain.out

Lines changed: 34 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -266,20 +266,47 @@ insert into dcomptable (d1[1].r, d1[1].i) values(100, 99); -- fail
266266
ERROR: value for domain dcomptypea violates check constraint "c1"
267267
update dcomptable set d1[1].r = d1[1].r + 1 where d1[1].i > 0; -- fail
268268
ERROR: value for domain dcomptypea violates check constraint "c1"
269-
update dcomptable set d1[1].r = d1[1].r - 1 where d1[1].i > 0;
269+
update dcomptable set d1[1].r = d1[1].r - 1, d1[1].i = d1[1].i + 1
270+
where d1[1].i > 0;
270271
select * from dcomptable;
271272
d1
272273
--------------------
273274
{"(11,)","(,)"}
274275
{"(99,)"}
275-
{"(1,2)","(,)"}
276-
{"(3,4)","(6,5)"}
277-
{"(7,8)","(10,9)"}
278-
{"(9,10)","(,)"}
279-
{"(0,2)"}
280-
{"(98,100)"}
276+
{"(1,3)","(,)"}
277+
{"(3,5)","(6,5)"}
278+
{"(7,9)","(10,9)"}
279+
{"(9,11)","(,)"}
280+
{"(0,3)"}
281+
{"(98,101)"}
281282
(8 rows)
282283

284+
explain (verbose, costs off)
285+
update dcomptable set d1[1].r = d1[1].r - 1, d1[1].i = d1[1].i + 1
286+
where d1[1].i > 0;
287+
QUERY PLAN
288+
----------------------------------------------------------------------------------------------------------------
289+
Update on public.dcomptable
290+
-> Seq Scan on public.dcomptable
291+
Output: (d1[1].r := (d1[1].r - '1'::double precision))[1].i := (d1[1].i + '1'::double precision), ctid
292+
Filter: (dcomptable.d1[1].i > '0'::double precision)
293+
(4 rows)
294+
295+
create rule silly as on delete to dcomptable do instead
296+
update dcomptable set d1[1].r = d1[1].r - 1, d1[1].i = d1[1].i + 1
297+
where d1[1].i > 0;
298+
\d+ dcomptable
299+
Table "public.dcomptable"
300+
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
301+
--------+------------+-----------+----------+---------+----------+--------------+-------------
302+
d1 | dcomptypea | | | | extended | |
303+
Indexes:
304+
"dcomptable_d1_key" UNIQUE CONSTRAINT, btree (d1)
305+
Rules:
306+
silly AS
307+
ON DELETE TO dcomptable DO INSTEAD UPDATE dcomptable SET d1[1].r = dcomptable.d1[1].r - 1::double precision, d1[1].i = dcomptable.d1[1].i + 1::double precision
308+
WHERE dcomptable.d1[1].i > 0::double precision
309+
283310
drop table dcomptable;
284311
drop type comptype cascade;
285312
NOTICE: drop cascades to type dcomptypea

‎src/test/regress/sql/domain.sql

Lines changed: 10 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -150,9 +150,18 @@ insert into dcomptable (d1[1].r) values(99);
150150
insert into dcomptable (d1[1].r, d1[1].i)values(99,100);
151151
insert into dcomptable (d1[1].r, d1[1].i)values(100,99);-- fail
152152
update dcomptableset d1[1].r= d1[1].r+1where d1[1].i>0;-- fail
153-
update dcomptableset d1[1].r= d1[1].r-1where d1[1].i>0;
153+
update dcomptableset d1[1].r= d1[1].r-1, d1[1].i= d1[1].i+1
154+
where d1[1].i>0;
154155
select*from dcomptable;
155156

157+
explain (verbose, costs off)
158+
update dcomptableset d1[1].r= d1[1].r-1, d1[1].i= d1[1].i+1
159+
where d1[1].i>0;
160+
createrulesillyason delete to dcomptable do instead
161+
update dcomptableset d1[1].r= d1[1].r-1, d1[1].i= d1[1].i+1
162+
where d1[1].i>0;
163+
\d+ dcomptable
164+
156165
droptable dcomptable;
157166
droptype comptype cascade;
158167

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