Handle time.Time values with "timestamp" columns.

sqlite3.go

@@ -23,9 +23,13 @@ import (
 	"database/sql/driver"
 	"errors"
 	"io"
+	"strings"
+	"time"
 	"unsafe"
 )
 
+const SQLiteTimestampFormat = "2006-01-02 15:04:05"
+
 func init() {
 	sql.Register("sqlite3", &SQLiteDriver{})
 }
@@ -194,6 +198,9 @@ func (s *SQLiteStmt) bind(args []driver.Value) error {
 				p = &v[0]
 			}
 			rv = C._sqlite3_bind_blob(s.s, n, unsafe.Pointer(p), C.int(len(v)))
+		case time.Time:
+			b := []byte(v.Format(SQLiteTimestampFormat))
+			rv = C._sqlite3_bind_text(s.s, n, (*C.char)(unsafe.Pointer(&b[0])), C.int(len(b)))
 		}
 		if rv != C.SQLITE_OK {
 			return errors.New(C.GoString(C.sqlite3_errmsg(s.c.db)))
@@ -206,7 +213,7 @@ func (s *SQLiteStmt) Query(args []driver.Value) (driver.Rows, error) {
 	if err := s.bind(args); err != nil {
 		return nil, err
 	}
-	return &SQLiteRows{s, int(C.sqlite3_column_count(s.s)), nil}, nil
+	return &SQLiteRows{s, int(C.sqlite3_column_count(s.s)), nil, nil}, nil
 }
 
 type SQLiteResult struct {
@@ -233,9 +240,10 @@ func (s *SQLiteStmt) Exec(args []driver.Value) (driver.Result, error) {
 }
 
 type SQLiteRows struct {
-	s    *SQLiteStmt
-	nc   int
-	cols []string
+	s        *SQLiteStmt
+	nc       int
+	cols     []string
+	decltype []string
 }
 
 func (rc *SQLiteRows) Close() error {
@@ -264,10 +272,23 @@ func (rc *SQLiteRows) Next(dest []driver.Value) error {
 	if rv != C.SQLITE_ROW {
 		return errors.New(C.GoString(C.sqlite3_errmsg(rc.s.c.db)))
 	}
+
+	if rc.decltype == nil {
+		rc.decltype = make([]string, rc.nc)
+		for i := 0; i < rc.nc; i++ {
+			rc.decltype[i] = strings.ToLower(C.GoString(C.sqlite3_column_decltype(rc.s.s, C.int(i))))
+		}
+	}
+
 	for i := range dest {
 		switch C.sqlite3_column_type(rc.s.s, C.int(i)) {
 		case C.SQLITE_INTEGER:
-			dest[i] = int64(C.sqlite3_column_int64(rc.s.s, C.int(i)))
+			val := int64(C.sqlite3_column_int64(rc.s.s, C.int(i)))
+			if rc.decltype[i] == "timestamp" {
+				dest[i] = time.Unix(val, 0)
+			} else {
+				dest[i] = val
+			}
 		case C.SQLITE_FLOAT:
 			dest[i] = float64(C.sqlite3_column_double(rc.s.s, C.int(i)))
 		case C.SQLITE_BLOB:
@@ -277,7 +298,16 @@ func (rc *SQLiteRows) Next(dest []driver.Value) error {
 		case C.SQLITE_NULL:
 			dest[i] = nil
 		case C.SQLITE_TEXT:
-			dest[i] = C.GoString((*C.char)(unsafe.Pointer(C.sqlite3_column_text(rc.s.s, C.int(i)))))
+			var err error
+			s := C.GoString((*C.char)(unsafe.Pointer(C.sqlite3_column_text(rc.s.s, C.int(i)))))
+			if rc.decltype[i] == "timestamp" {
+				dest[i], err = time.Parse(SQLiteTimestampFormat, s)
+				if err != nil {
+					return err
+				}
+			} else {
+				dest[i] = s
+			}
 		}
 	}
 	return nil

sqlite3_test.go

@@ -3,7 +3,9 @@ package sqlite
 import (
 	"database/sql"
 	"os"
+	"strings"
 	"testing"
+	"time"
 )
 
 func TestOpen(t *testing.T) {
@@ -260,3 +262,80 @@ func TestBooleanRoundtrip(t *testing.T) {
 		}
 	}
 }
+
+func TestTimestamp(t *testing.T) {
+	db, err := sql.Open("sqlite3", "./foo.db")
+	if err != nil {
+		t.Errorf("Failed to open database:", err)
+		return
+	}
+	defer os.Remove("./foo.db")
+
+	_, err = db.Exec("DROP TABLE foo")
+	_, err = db.Exec("CREATE TABLE foo(id INTEGER, ts timeSTAMP)")
+	if err != nil {
+		t.Errorf("Failed to create table:", err)
+		return
+	}
+
+	timestamp1 := time.Date(2012, time.April, 6, 22, 50, 0, 0, time.UTC)
+	_, err = db.Exec("INSERT INTO foo(id, ts) VALUES(1, ?)", timestamp1)
+	if err != nil {
+		t.Errorf("Failed to insert timestamp:", err)
+		return
+	}
+
+	timestamp2 := time.Date(2012, time.April, 6, 23, 22, 0, 0, time.UTC)
+	_, err = db.Exec("INSERT INTO foo(id, ts) VALUES(2, ?)", timestamp2.Unix())
+	if err != nil {
+		t.Errorf("Failed to insert timestamp:", err)
+		return
+	}
+
+	_, err = db.Exec("INSERT INTO foo(id, ts) VALUES(3, ?)", "nonsense")
+	if err != nil {
+		t.Errorf("Failed to insert nonsense:", err)
+		return
+	}
+
+	rows, err := db.Query("SELECT id, ts FROM foo ORDER BY id ASC")
+	if err != nil {
+		t.Errorf("Unable to query foo table:", err)
+		return
+	}
+
+	seen := 0
+	for rows.Next() {
+		var id int
+		var ts time.Time
+
+		if err := rows.Scan(&id, &ts); err != nil {
+			t.Errorf("Unable to scan results:", err)
+			continue
+		}
+
+		if id == 1 {
+			seen += 1
+			if !timestamp1.Equal(ts) {
+				t.Errorf("Value for id 1 should be %v, not %v", timestamp1, ts)
+			}
+		}
+
+		if id == 2 {
+			seen += 1
+			if !timestamp2.Equal(ts) {
+				t.Errorf("Value for id 2 should be %v, not %v", timestamp2, ts)
+			}
+		}
+	}
+
+	if seen != 2 {
+		t.Errorf("Expected to see two valid timestamps")
+	}
+
+	// make sure "nonsense" triggered an error
+	err = rows.Err()
+	if err == nil || !strings.Contains(err.Error(), "cannot parse \"nonsense\"") {
+		t.Errorf("Expected error from \"nonsense\" timestamp")
+	}
+}