Fixed insert returning many for a single insert

Author: wickwirew

Sources/Compiler/Gen/SwiftLanguage.swift

@@ -594,7 +594,7 @@ public struct SwiftLanguage: Language {
             writer.write(", tx: borrowing Transaction) async throws -> Output ")
 
             writer.braces {
-                writer.write(line: "try await execute(with: ", query.inputName, "(")
+                writer.write(line: "try execute(with: ", query.inputName, "(")
                 initInput()
                 writer.write("), tx: tx)")
             }

Sources/Compiler/Sema/CardinalityInferrer.swift

@@ -102,10 +102,7 @@ extension CardinalityInferrer: StmtSyntaxVisitor {
                 return cadinalityForFilter(filter, for: t.table)
             }
         case let .values(values):
-            // VALUES (1, 2), (3, 4)
-            if values.count > 1 {
-                return .many
-            }
+            return values.count > 1 ? .many : .single
         }
 
         return .many

Tests/CompilerTests/Compiler/CompileIsSingleResult.sql

@@ -34,3 +34,9 @@ SELECT * FROM employee WHERE companyId = 1 OR userId = 1;
 
 -- CHECK: MANY
 SELECT * FROM noPk WHERE value = ?;
+
+-- CHECK: SINGLE
+INSERT INTO user VALUES (1, 'bob') RETURNING *;
+
+-- CHECK: MANY
+INSERT INTO user VALUES (1, 'bob'), (2, 'joe') RETURNING *;

Tests/CompilerTests/Gen/Swift.output

@@ -417,7 +417,7 @@ extension Query where Input == InsertUserInput {
     }
 
     func execute(id: Int, firstName: String, lastName: String, preference: Bool?, favoriteNumber: Int?, randomValue: SQLAny?, bornOn: Date?, tx: borrowing Transaction) async throws -> Output {
-        try await execute(with: InsertUserInput(id: id, firstName: firstName, lastName: lastName, preference: preference, favoriteNumber: favoriteNumber, randomValue: randomValue, bornOn: bornOn), tx: tx)
+        try execute(with: InsertUserInput(id: id, firstName: firstName, lastName: lastName, preference: preference, favoriteNumber: favoriteNumber, randomValue: randomValue, bornOn: bornOn), tx: tx)
     }
 
     func observe(id: Int, firstName: String, lastName: String, preference: Bool?, favoriteNumber: Int?, randomValue: SQLAny?, bornOn: Date?) -> any QueryObservation<Output> {
@@ -436,7 +436,7 @@ extension Query where Input == SelectUserWithManyInputsInput {
     }
 
     func execute(id: Int, firstName: String, tx: borrowing Transaction) async throws -> Output {
-        try await execute(with: SelectUserWithManyInputsInput(id: id, firstName: firstName), tx: tx)
+        try execute(with: SelectUserWithManyInputsInput(id: id, firstName: firstName), tx: tx)
     }
 
     func observe(id: Int, firstName: String) -> any QueryObservation<Output> {