feat(spanner/spannertest): support INSERT DML (#7820)

Co-authored-by: rahul2393 <irahul@google.com>

spanner/spannertest/README.md

@@ -33,7 +33,6 @@ by ascending esotericism:
 - case insensitivity of table and column names and query aliases
 - transaction simulation
 - FOREIGN KEY and CHECK constraints
-- INSERT DML statements
 - set operations (UNION, INTERSECT, EXCEPT)
 - STRUCT types
 - partition support

spanner/spannertest/db.go

@@ -1262,6 +1262,64 @@ func (d *database) Execute(stmt spansql.DMLStmt, params queryParams) (int, error
 			}
 		}
 		return n, nil
+	case *spansql.Insert:
+		t, err := d.table(stmt.Table)
+		if err != nil {
+			return 0, err
+		}
+
+		t.mu.Lock()
+		defer t.mu.Unlock()
+
+		ec := evalContext{
+			cols:   t.cols,
+			params: params,
+		}
+
+		values := make(row, len(t.cols))
+		input := stmt.Input.(spansql.Values)
+		if len(input) > 0 {
+			for i := 0; i < len(input); i++ {
+				val := input[i]
+				for k, v := range val {
+					switch v := v.(type) {
+					// if spanner.Statement.Params is not empty, scratch row with ec.parameters
+					case spansql.Param:
+						values[k] = ec.params[t.cols[k].Name.SQL()].Value
+					// if nil is included in parameters, pass nil
+					case spansql.ID:
+						cutset := `""`
+						str := strings.Trim(v.SQL(), cutset)
+						if str == "nil" {
+							values[k] = nil
+						} else {
+							expr, err := ec.evalExpr(v)
+							if err != nil {
+								return 0, status.Errorf(codes.InvalidArgument, "invalid parameter format")
+							}
+							values[k] = expr
+						}
+					// if parameter is embedded in SQL as string, not in statement.Params, analyze parameters
+					default:
+						expr, err := ec.evalExpr(v)
+						if err != nil {
+							return 0, status.Errorf(codes.InvalidArgument, "invalid parameter format")
+						}
+						values[k] = expr
+					}
+				}
+			}
+		}
+
+		// pk check if the primary key already exists
+		pk := values[:t.pkCols]
+		rowNum, found := t.rowForPK(pk)
+		if found {
+			return 0, status.Errorf(codes.AlreadyExists, "row already in table")
+		}
+		t.insertRow(rowNum, values)
+
+		return 1, nil
 	}
 }
 

spanner/spannertest/integration_test.go

@@ -708,23 +708,91 @@ func TestIntegration_ReadsAndQueries(t *testing.T) {
 		spanner.Insert("SomeStrings", []string{"i", "str"}, []interface{}{1, "abar"}),
 		spanner.Insert("SomeStrings", []string{"i", "str"}, []interface{}{2, nil}),
 		spanner.Insert("SomeStrings", []string{"i", "str"}, []interface{}{3, "bbar"}),
-
-		spanner.Insert("Updateable", []string{"id", "first", "last"}, []interface{}{0, "joe", nil}),
-		spanner.Insert("Updateable", []string{"id", "first", "last"}, []interface{}{1, "doe", "joan"}),
-		spanner.Insert("Updateable", []string{"id", "first", "last"}, []interface{}{2, "wong", "wong"}),
 	})
 	if err != nil {
 		t.Fatalf("Inserting sample data: %v", err)
 	}
 
+	// Perform INSERT DML; the results are checked later on.
+	n = 0
+	_, err = client.ReadWriteTransaction(ctx, func(ctx context.Context, tx *spanner.ReadWriteTransaction) error {
+		for _, u := range []string{
+			`INSERT INTO Updateable (id, first, last) VALUES (0, "joe", nil)`,
+			`INSERT INTO Updateable (id, first, last) VALUES (1, "doe", "joan")`,
+			`INSERT INTO Updateable (id, first, last) VALUES (2, "wong", "wong")`,
+		} {
+			nr, err := tx.Update(ctx, spanner.NewStatement(u))
+			if err != nil {
+				return err
+			}
+			n += nr
+		}
+		return nil
+	})
+	if err != nil {
+		t.Fatalf("Inserting with DML: %v", err)
+	}
+	if n != 3 {
+		t.Errorf("Inserting with DML affected %d rows, want 3", n)
+	}
+
+	// Perform INSERT DML with statement.Params; the results are checked later on.
+	n = 0
+	_, err = client.ReadWriteTransaction(ctx, func(ctx context.Context, tx *spanner.ReadWriteTransaction) error {
+		stmt := spanner.Statement{
+			SQL: "INSERT INTO Updateable (id, first, last) VALUES (@id, @first, @last)",
+			Params: map[string]interface{}{
+				"id":    3,
+				"first": "tom",
+				"last":  "jerry",
+			},
+		}
+		nr, err := tx.Update(ctx, stmt)
+		if err != nil {
+			return err
+		}
+		n += nr
+		return nil
+	})
+	if err != nil {
+		t.Fatalf("Inserting with DML: %v", err)
+	}
+	if n != 1 {
+		t.Errorf("Inserting with DML affected %d rows, want 1", n)
+	}
+
+	// Perform INSERT DML with statement.Params and inline parameter; the results are checked later on.
+	n = 0
+	_, err = client.ReadWriteTransaction(ctx, func(ctx context.Context, tx *spanner.ReadWriteTransaction) error {
+		stmt := spanner.Statement{
+			SQL: `INSERT INTO Updateable (id, first, last) VALUES (@id, "jim", @last)`,
+			Params: map[string]interface{}{
+				"id":   4,
+				"last": nil,
+			},
+		}
+		nr, err := tx.Update(ctx, stmt)
+		if err != nil {
+			return err
+		}
+		n += nr
+		return nil
+	})
+	if err != nil {
+		t.Fatalf("Inserting with DML: %v", err)
+	}
+	if n != 1 {
+		t.Errorf("Inserting with DML affected %d rows, want 1", n)
+	}
+
 	// Perform UPDATE DML; the results are checked later on.
 	n = 0
 	_, err = client.ReadWriteTransaction(ctx, func(ctx context.Context, tx *spanner.ReadWriteTransaction) error {
 		for _, u := range []string{
 			`UPDATE Updateable SET last = "bloggs" WHERE id = 0`,
 			`UPDATE Updateable SET first = last, last = first WHERE id = 1`,
 			`UPDATE Updateable SET last = DEFAULT WHERE id = 2`,
-			`UPDATE Updateable SET first = "noname" WHERE id = 3`, // no id=3
+			`UPDATE Updateable SET first = "noname" WHERE id = 5`, // no id=5
 		} {
 			nr, err := tx.Update(ctx, spanner.NewStatement(u))
 			if err != nil {
@@ -1156,6 +1224,8 @@ func TestIntegration_ReadsAndQueries(t *testing.T) {
 				{int64(0), "joe", "bloggs"},
 				{int64(1), "joan", "doe"},
 				{int64(2), "wong", nil},
+				{int64(3), "tom", "jerry"},
+				{int64(4), "jim", nil},
 			},
 		},
 		// Regression test for aggregating no rows; it used to return an empty row.