optimize lexer complie

Author: sjjian

lexer.go

@@ -314,7 +314,7 @@ func init() {
 
 	AddTokenBetween(_doubleQuoteStr, []byte(`"`), byte('"'))
 	AddTokenBetween(_singleQuoteStr, []byte(`'`), byte('\''))
-	err := lexer.Compile()
+	err := lexer.CompileNFA()
 	if err != nil {
 		panic(err)
 	}

parser_test.go

@@ -115,13 +115,13 @@ func TestSingleQuery(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, 1, len(stmt))
 	assert.IsType(t, &ast.CreateTableStmt{}, stmt[0])
-	assert.Equal(t, `create table db1.table1 (id number(10))`, stmt[0])
+	assert.Equal(t, `create table db1.table1 (id number(10))`, stmt[0].Text())
 
 	stmt, err = Parser(`create table db1.table1 (id number(10));`)
 	assert.NoError(t, err)
 	assert.Equal(t, 1, len(stmt))
 	assert.IsType(t, &ast.CreateTableStmt{}, stmt[0])
-	assert.Equal(t, `create table db1.table1 (id number(10));`, stmt[0])
+	assert.Equal(t, `create table db1.table1 (id number(10));`, stmt[0].Text())
 }
 
 func TestMultiQuery(t *testing.T) {