diff --git a/magic.go b/magic.go
index f5bb5c7..619a8d3 100644
--- a/magic.go
+++ b/magic.go
@@ -1,7 +1,6 @@
 package mogi
 
 import (
-	"database/sql/driver"
 	"fmt"
 	"log"
 	"strconv"
@@ -74,36 +73,6 @@ func transmogrify(v interface{}) interface{} {
 	return nil
 }
 
-// convert args to their 64-bit versions
-// for easy comparisons
-func unify(v interface{}) interface{} {
-	switch x := v.(type) {
-	case int:
-		return int64(x)
-	case int32:
-		return int64(x)
-	case float32:
-		return float64(x)
-	case string:
-		return []byte(x)
-	}
-	return v
-}
-
-func unifyValues(arr []driver.Value) []driver.Value {
-	for i, v := range arr {
-		arr[i] = unify(v)
-	}
-	return arr
-}
-
-func unifyArray(arr []interface{}) []interface{} {
-	for i, v := range arr {
-		arr[i] = unify(v)
-	}
-	return arr
-}
-
 func extractColumnName(nse *sqlparser.NonStarExpr) string {
 	if nse.As != nil {
 		return string(nse.As)
diff --git a/select_test.go b/select_test.go
index 9024187..590de5f 100644
--- a/select_test.go
+++ b/select_test.go
@@ -59,6 +59,12 @@ func TestSelectWhere(t *testing.T) {
 	mogi.Select().From("beer").Where("pct", 5).StubCSV(beerCSV)
 	runBeerSelectQuery(t, db)
 
+	// where with weird type
+	type coolInt int
+	mogi.Reset()
+	mogi.Select().From("beer").Where("pct", coolInt(5)).StubCSV(beerCSV)
+	runBeerSelectQuery(t, db)
+
 	// wrong where
 	mogi.Reset()
 	mogi.Select().From("beer").Where("pct", 98).StubCSV(beerCSV)
diff --git a/stub.go b/stub.go
index 069af42..5e0c011 100644
--- a/stub.go
+++ b/stub.go
@@ -13,6 +13,10 @@ type Stub struct {
 	resolve func(input)
 }
 
+type subquery struct {
+	chain condchain
+}
+
 // Select starts a new stub for SELECT statements.
 // You can filter out which columns to use this stub for.
 // If you don't pass any columns, it will stub all SELECT queries.
@@ -91,6 +95,10 @@ func (s *Stub) StubError(err error) {
 	addStub(s)
 }
 
+func (s *Stub) Subquery() subquery {
+	return subquery{chain: s.chain}
+}
+
 func (s *Stub) matches(in input) bool {
 	return s.chain.matches(in)
 }
diff --git a/unify.go b/unify.go
new file mode 100644
index 0000000..3446d1c
--- /dev/null
+++ b/unify.go
@@ -0,0 +1,103 @@
+package mogi
+
+import (
+	"database/sql/driver"
+	"reflect"
+	"time"
+)
+
+/*
+int64
+float64
+bool
+[]byte
+string   [*] everywhere except from Rows.Next.
+time.Time
+*/
+
+// unify converts values to fit driver.Value,
+// except []byte which is converted to string.
+func unify(v interface{}) interface{} {
+	// happy path
+	switch x := v.(type) {
+	case nil:
+		return x
+	case bool:
+		return x
+
+	// int64
+	case int64:
+		return x
+	case int:
+		return int64(x)
+	case int32:
+		return int64(x)
+	case int16:
+		return int64(x)
+	case int8:
+		return int64(x)
+	case byte:
+		return int64(x)
+
+	// float64
+	case float32:
+		return float64(x)
+
+	// string
+	case string:
+		return x
+	case []byte:
+		return string(x)
+
+	// time.Time
+	case time.Time:
+		return x
+	case *time.Time:
+		if x == nil {
+			return nil
+		}
+		return *x
+	}
+
+	// sad path
+	rv := reflect.ValueOf(v)
+	return reflectUnify(rv)
+}
+
+func reflectUnify(rv reflect.Value) interface{} {
+	switch rv.Kind() {
+	case reflect.Ptr:
+		if rv.IsNil() {
+			return nil
+		}
+		return reflectUnify(rv.Elem())
+	case reflect.Bool:
+		return rv.Bool()
+	case reflect.Int64, reflect.Int, reflect.Int32, reflect.Int16, reflect.Int8:
+		return rv.Int()
+	case reflect.Float64, reflect.Float32:
+		return rv.Float()
+	case reflect.String:
+		return rv.String()
+	case reflect.Slice:
+		if rv.Elem().Kind() == reflect.Int8 {
+			return string(rv.Bytes())
+		}
+	}
+
+	panic("couldn't unify value of type " + rv.Type().Name())
+}
+
+func unifyValues(values []driver.Value) []driver.Value {
+	for i, v := range values {
+		values[i] = unify(v)
+	}
+	return values
+}
+
+func unifyInterfaces(slice []interface{}) []interface{} {
+	for i, v := range slice {
+		slice[i] = unify(v)
+	}
+	return slice
+}
diff --git a/where.go b/where.go
index 9608a6e..04e3a95 100644
--- a/where.go
+++ b/where.go
@@ -14,7 +14,7 @@ type whereCond struct {
 func newWhereCond(col string, v []interface{}) whereCond {
 	return whereCond{
 		col: strings.ToLower(col),
-		v:   unifyArray(v),
+		v:   unifyInterfaces(v),
 	}
 }
 
@@ -49,7 +49,7 @@ type whereOpCond struct {
 func newWhereOpCond(col string, v []interface{}, op string) whereOpCond {
 	return whereOpCond{
 		col: strings.ToLower(col),
-		v:   unifyArray(v),
+		v:   unifyInterfaces(v),
 		op:  strings.ToLower(op),
 	}
 }