sql: add Star expression. (#25)

Author: smola

sql/expression/star.go

@@ -0,0 +1,26 @@
+package expression
+
+import "github.com/mvader/gitql/sql"
+
+type Star struct {
+}
+
+func NewStar() *Star {
+	return &Star{}
+}
+
+func (Star) Resolved() bool {
+	return false
+}
+
+func (Star) Type() sql.Type {
+	return sql.String //FIXME
+}
+
+func (Star) Name() string {
+	return "*"
+}
+
+func (Star) Eval(r sql.Row) interface{} {
+	return "FAIL" //FIXME
+}

sql/expression/star_test.go

@@ -0,0 +1,15 @@
+package expression
+
+import (
+	"testing"
+
+	"github.com/mvader/gitql/sql"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestStar(t *testing.T) {
+	assert := assert.New(t)
+	var e sql.Expression = NewStar()
+	assert.NotNil(e)
+	assert.Equal("*", e.Name())
+}