[#7444] remove unnecessery subquery when resolving single back-relation fields

core/record_field_resolver_runner.go

@@ -547,15 +547,11 @@ func (r *runner) processActiveProps() (*search.ResolverResult, error) {
 			// ---
 			cleanProp := inflector.Columnify(prop)
 			cleanBackFieldName := inflector.Columnify(backRelField.Name)
+
 			newTableAlias := r.activeTableAlias + "_" + cleanProp + r.resolver.joinAliasSuffix
 			newCollectionName := inflector.Columnify(backCollection.Name)
 
 			isBackRelMultiple := backRelField.IsMultiple()
-			if !isBackRelMultiple {
-				// additionally check if the rel field has a single column unique index
-				_, hasUniqueIndex := dbutils.FindSingleColumnUniqueIndex(backCollection.Indexes, backRelField.Name)
-				isBackRelMultiple = !hasUniqueIndex
-			}
 
 			if !isBackRelMultiple {
 				err := r.resolver.registerJoin(
@@ -592,6 +588,11 @@ func (r *runner) processActiveProps() (*search.ResolverResult, error) {
 			// ---
 			if isBackRelMultiple {
 				r.withMultiMatch = true // enable multimatch if not already
+			} else if !r.withMultiMatch {
+				// additionally check if the rel field has a single column unique index;
+				// if not - apply a multi-match check
+				_, hasUniqueIndex := dbutils.FindSingleColumnUniqueIndex(backCollection.Indexes, backRelField.Name)
+				r.withMultiMatch = !hasUniqueIndex
 			}
 
 			newTableAlias2 := r.multiMatchActiveTableAlias + "_" + cleanProp + r.resolver.joinAliasSuffix

core/record_field_resolver_test.go

@@ -127,14 +127,14 @@ func TestRecordFieldResolverUpdateQuery(t *testing.T) {
 		expectQuery        string
 	}{
 		{
-			"non relation field (with all default operators)",
+			"none relation field (with all default operators)",
 			"demo4",
 			"title = true || title != 'test' || title ~ 'test1' || title !~ '%test2' || title > 1 || title >= 2 || title < 3 || title <= 4",
 			false,
 			"SELECT `demo4`.* FROM `demo4` WHERE ([[demo4.title]] = 1 OR [[demo4.title]] IS NOT {:TEST} OR [[demo4.title]] LIKE {:TEST} ESCAPE '\\' OR [[demo4.title]] NOT LIKE {:TEST} ESCAPE '\\' OR [[demo4.title]] > {:TEST} OR [[demo4.title]] >= {:TEST} OR [[demo4.title]] < {:TEST} OR [[demo4.title]] <= {:TEST})",
 		},
 		{
-			"non relation field (with all opt/any operators)",
+			"none relation field (with all opt/any operators)",
 			"demo4",
 			"title ?= true || title ?!= 'test' || title ?~ 'test1' || title ?!~ '%test2' || title ?> 1 || title ?>= 2 || title ?< 3 || title ?<= 4",
 			false,
@@ -292,7 +292,7 @@ func TestRecordFieldResolverUpdateQuery(t *testing.T) {
 			"demo3",
 			"demo4_via_rel_one_cascade.id = true",
 			false,
-			"SELECT DISTINCT `demo3`.* FROM `demo3` LEFT JOIN `demo4` `demo3_demo4_via_rel_one_cascade` ON [[demo3.id]] IN (SELECT [[__je_demo3_demo4_via_rel_one_cascade.value]] FROM json_each(CASE WHEN iif(json_valid([[demo3_demo4_via_rel_one_cascade.rel_one_cascade]]), json_type([[demo3_demo4_via_rel_one_cascade.rel_one_cascade]])='array', FALSE) THEN [[demo3_demo4_via_rel_one_cascade.rel_one_cascade]] ELSE json_array([[demo3_demo4_via_rel_one_cascade.rel_one_cascade]]) END) {{__je_demo3_demo4_via_rel_one_cascade}}) WHERE ((([[demo3_demo4_via_rel_one_cascade.id]] = 1) AND (NOT EXISTS (SELECT 1 FROM (SELECT [[__mm_demo3_demo4_via_rel_one_cascade.id]] as [[multiMatchValue]] FROM `demo3` `__mm_demo3` LEFT JOIN `demo4` `__mm_demo3_demo4_via_rel_one_cascade` ON [[__mm_demo3.id]] IN (SELECT [[__je___mm_demo3_demo4_via_rel_one_cascade.value]] FROM json_each(CASE WHEN iif(json_valid([[__mm_demo3_demo4_via_rel_one_cascade.rel_one_cascade]]), json_type([[__mm_demo3_demo4_via_rel_one_cascade.rel_one_cascade]])='array', FALSE) THEN [[__mm_demo3_demo4_via_rel_one_cascade.rel_one_cascade]] ELSE json_array([[__mm_demo3_demo4_via_rel_one_cascade.rel_one_cascade]]) END) {{__je___mm_demo3_demo4_via_rel_one_cascade}}) WHERE `__mm_demo3`.`id` = `demo3`.`id`) {{__smTEST}} WHERE NOT ([[__smTEST.multiMatchValue]] = 1)))))",
+			"SELECT DISTINCT `demo3`.* FROM `demo3` LEFT JOIN `demo4` `demo3_demo4_via_rel_one_cascade` ON [[demo3_demo4_via_rel_one_cascade.rel_one_cascade]] = [[demo3.id]] WHERE ((([[demo3_demo4_via_rel_one_cascade.id]] = 1) AND (NOT EXISTS (SELECT 1 FROM (SELECT [[__mm_demo3_demo4_via_rel_one_cascade.id]] as [[multiMatchValue]] FROM `demo3` `__mm_demo3` LEFT JOIN `demo4` `__mm_demo3_demo4_via_rel_one_cascade` ON [[__mm_demo3_demo4_via_rel_one_cascade.rel_one_cascade]] = [[__mm_demo3.id]] WHERE `__mm_demo3`.`id` = `demo3`.`id`) {{__smTEST}} WHERE NOT ([[__smTEST.multiMatchValue]] = 1)))))",
 		},
 		{
 			"back relations via single relation field (with unique index)",
@@ -334,7 +334,7 @@ func TestRecordFieldResolverUpdateQuery(t *testing.T) {
 			"demo1",
 			"view1_via_rel_one.rel_many.created ?> true",
 			true,
-			"SELECT DISTINCT `demo1`.* FROM `demo1` LEFT JOIN `view1` `demo1_view1_via_rel_one` ON [[demo1.id]] IN (SELECT [[__je_demo1_view1_via_rel_one.value]] FROM json_each(CASE WHEN iif(json_valid([[demo1_view1_via_rel_one.rel_one]]), json_type([[demo1_view1_via_rel_one.rel_one]])='array', FALSE) THEN [[demo1_view1_via_rel_one.rel_one]] ELSE json_array([[demo1_view1_via_rel_one.rel_one]]) END) {{__je_demo1_view1_via_rel_one}}) LEFT JOIN json_each(CASE WHEN iif(json_valid([[demo1_view1_via_rel_one.rel_many]]), json_type([[demo1_view1_via_rel_one.rel_many]])='array', FALSE) THEN [[demo1_view1_via_rel_one.rel_many]] ELSE json_array([[demo1_view1_via_rel_one.rel_many]]) END) `__je_demo1_view1_via_rel_one_rel_many` LEFT JOIN `users` `demo1_view1_via_rel_one_rel_many` ON [[demo1_view1_via_rel_one_rel_many.id]] = [[__je_demo1_view1_via_rel_one_rel_many.value]] WHERE [[demo1_view1_via_rel_one_rel_many.created]] > 1",
+			"SELECT DISTINCT `demo1`.* FROM `demo1` LEFT JOIN `view1` `demo1_view1_via_rel_one` ON [[demo1_view1_via_rel_one.rel_one]] = [[demo1.id]] LEFT JOIN json_each(CASE WHEN iif(json_valid([[demo1_view1_via_rel_one.rel_many]]), json_type([[demo1_view1_via_rel_one.rel_many]])='array', FALSE) THEN [[demo1_view1_via_rel_one.rel_many]] ELSE json_array([[demo1_view1_via_rel_one.rel_many]]) END) `__je_demo1_view1_via_rel_one_rel_many` LEFT JOIN `users` `demo1_view1_via_rel_one_rel_many` ON [[demo1_view1_via_rel_one_rel_many.id]] = [[__je_demo1_view1_via_rel_one_rel_many.value]] WHERE [[demo1_view1_via_rel_one_rel_many.created]] > 1",
 		},
 		{
 			"recursive back relations with non-empty list rule",