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Commit82406d6

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Fix deparsing of ON CONFLICT arbiter WHERE clauses.
The parser doesn't allow qualification of column names appearing inthese clauses, but ruleutils.c would sometimes qualify them, leadingto dump/reload failures. Per bug #13891 from Onder Kalaci.(In passing, make stanzas in ruleutils.c that save/restore varprefixmore consistent.)Peter Geoghegan
1 parentbd0302c commit82406d6

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2 files changed

+18
-5
lines changed

2 files changed

+18
-5
lines changed

‎src/backend/utils/adt/ruleutils.c

Lines changed: 16 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -5526,9 +5526,21 @@ get_insert_query_def(Query *query, deparse_context *context)
55265526
/* Add a WHERE clause (for partial indexes) if given */
55275527
if (confl->arbiterWhere!=NULL)
55285528
{
5529+
boolsave_varprefix;
5530+
5531+
/*
5532+
* Force non-prefixing of Vars, since parser assumes that they
5533+
* belong to target relation. WHERE clause does not use
5534+
* InferenceElem, so this is separately required.
5535+
*/
5536+
save_varprefix=context->varprefix;
5537+
context->varprefix= false;
5538+
55295539
appendContextKeyword(context," WHERE ",
55305540
-PRETTYINDENT_STD,PRETTYINDENT_STD,1);
55315541
get_rule_expr(confl->arbiterWhere,context, false);
5542+
5543+
context->varprefix=save_varprefix;
55325544
}
55335545
}
55345546
elseif (confl->constraint!=InvalidOid)
@@ -7950,13 +7962,14 @@ get_rule_expr(Node *node, deparse_context *context,
79507962
caseT_InferenceElem:
79517963
{
79527964
InferenceElem*iexpr= (InferenceElem*)node;
7953-
boolvarprefix=context->varprefix;
7965+
boolsave_varprefix;
79547966
boolneed_parens;
79557967

79567968
/*
79577969
* InferenceElem can only refer to target relation, so a
7958-
* prefix isnever useful.
7970+
* prefix isnot useful, and indeed would cause parse errors.
79597971
*/
7972+
save_varprefix=context->varprefix;
79607973
context->varprefix= false;
79617974

79627975
/*
@@ -7976,7 +7989,7 @@ get_rule_expr(Node *node, deparse_context *context,
79767989
if (need_parens)
79777990
appendStringInfoChar(buf,')');
79787991

7979-
context->varprefix=varprefix;
7992+
context->varprefix=save_varprefix;
79807993

79817994
if (iexpr->infercollid)
79827995
appendStringInfo(buf," COLLATE %s",

‎src/test/regress/expected/rules.out

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2832,7 +2832,7 @@ SELECT definition FROM pg_rules WHERE tablename = 'hats' ORDER BY rulename;
28322832
CREATE RULE hat_nosert AS +
28332833
ON INSERT TO hats DO INSTEAD INSERT INTO hat_data (hat_name, hat_color) +
28342834
VALUES (new.hat_name, new.hat_color) ON CONFLICT(hat_name COLLATE "C" bpchar_pattern_ops)+
2835-
WHERE (hat_data.hat_color = 'green'::bpchar) DO NOTHING +
2835+
WHERE (hat_color = 'green'::bpchar) DO NOTHING +
28362836
RETURNING hat_data.hat_name, +
28372837
hat_data.hat_color;
28382838
(1 row)
@@ -2857,7 +2857,7 @@ SELECT tablename, rulename, definition FROM pg_rules
28572857
hats | hat_nosert | CREATE RULE hat_nosert AS +
28582858
| | ON INSERT TO hats DO INSTEAD INSERT INTO hat_data (hat_name, hat_color) +
28592859
| | VALUES (new.hat_name, new.hat_color) ON CONFLICT(hat_name COLLATE "C" bpchar_pattern_ops)+
2860-
| | WHERE (hat_data.hat_color = 'green'::bpchar) DO NOTHING +
2860+
| | WHERE (hat_color = 'green'::bpchar) DO NOTHING +
28612861
| | RETURNING hat_data.hat_name, +
28622862
| | hat_data.hat_color;
28632863
(1 row)

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