Example #1
0
func TestBadUpdateExpr(t *testing.T) {
	var sql string

	r := newTestDBRule()

	sql = "insert into test1 (id) values (5) on duplicate key update  id = 10"

	stmt, err := sqlparser.Parse(sql)
	if err != nil {
		t.Fatal(err.Error())
	}

	if _, err := r.BuildPlan(stmt); err == nil {
		t.Fatal("must err")
	}

	sql = "update test1 set id = 10 where id = 5"

	stmt, err = sqlparser.Parse(sql)
	if err != nil {
		t.Fatal(err.Error())
	}

	if _, err := r.BuildPlan(stmt); err == nil {
		t.Fatal("must err")
	}
}
Example #2
0
func (c *ClientConn) handleStmtPrepare(sql string) error {
	if c.schema == nil {
		return mysql.NewDefaultError(mysql.ER_NO_DB_ERROR)
	}

	s := new(Stmt)

	sql = strings.TrimRight(sql, ";")

	var err error
	s.s, err = sqlparser.Parse(sql)
	if err != nil {
		return fmt.Errorf(`parse sql "%s" error`, sql)
	}

	s.sql = sql

	n := c.proxy.GetNode(c.user)

	if co, err := n.GetMasterConn(); err != nil {
		return fmt.Errorf("prepare error %s", err)
	} else {
		defer co.Close()

		if err = co.UseDB(c.schema.db); err != nil {
			return fmt.Errorf("parepre error %s", err)
		}

		if t, err := co.Prepare(sql); err != nil {
			return fmt.Errorf("parepre error %s", err)
		} else {

			s.params = t.ParamNum()
			s.columns = t.ColumnNum()
		}
	}

	s.id = c.stmtId
	c.stmtId++

	if err = c.writePrepare(s); err != nil {
		return err
	}

	s.ResetParams()

	c.stmts[s.id] = s

	return nil
}
Example #3
0
func checkPlan(t *testing.T, sql string, tableIndexs []int, nodeIndexs []int) {
	r := newTestRouter()
	stmt, err := sqlparser.Parse(sql)
	if err != nil {
		t.Fatal(err.Error())
	}
	plan, err := r.BuildPlan(stmt)
	if err != nil {
		t.Fatal(err.Error())
	}

	if isListEqual(plan.RouteTableIndexs, tableIndexs) == false {
		err := fmt.Errorf("RouteTableIndexs=%v but tableIndexs=%v",
			plan.RouteTableIndexs, tableIndexs)
		t.Fatal(err.Error())
	}
	if isListEqual(plan.RouteNodeIndexs, nodeIndexs) == false {
		err := fmt.Errorf("RouteNodeIndexs=%v but nodeIndexs=%v",
			plan.RouteNodeIndexs, nodeIndexs)
		t.Fatal(err.Error())
	}
	t.Logf("rewritten_sql=%v", plan.RewrittenSqls)

}
Example #4
0
/*处理query语句*/
func (c *ClientConn) handleQuery(sql string) (err error) {
	defer func() {
		if e := recover(); e != nil {
			golog.OutputSql("Error", "err:%v,sql:%s", e, sql)

			if err, ok := e.(error); ok {
				const size = 4096
				buf := make([]byte, size)
				buf = buf[:runtime.Stack(buf, false)]

				golog.Error("ClientConn", "handleQuery",
					err.Error(), 0,
					"stack", string(buf), "sql", sql)
			}
			return
		}
	}()

	sql = strings.TrimRight(sql, ";") //删除sql语句最后的分号
	hasHandled, err := c.preHandleShard(sql)
	if err != nil {
		golog.Error("server", "preHandleShard", err.Error(), 0, "hasHandled", hasHandled)
		return err
	}
	if hasHandled {
		return nil
	}

	var stmt sqlparser.Statement
	stmt, err = sqlparser.Parse(sql) //解析sql语句,得到的stmt是一个interface
	if err != nil {
		golog.Error("server", "parse", err.Error(), 0, "hasHandled", hasHandled, "sql", sql)
		return err
	}

	switch v := stmt.(type) {
	case *sqlparser.Select:
		return c.handleSelect(v, nil)
	case *sqlparser.Insert:
		return c.handleExec(stmt, nil)
	case *sqlparser.Update:
		return c.handleExec(stmt, nil)
	case *sqlparser.Delete:
		return c.handleExec(stmt, nil)
	case *sqlparser.Replace:
		return c.handleExec(stmt, nil)
	case *sqlparser.Set:
		return c.handleSet(v, sql)
	case *sqlparser.Begin:
		return c.handleBegin()
	case *sqlparser.Commit:
		return c.handleCommit()
	case *sqlparser.Rollback:
		return c.handleRollback()
	case *sqlparser.Admin:
		return c.handleAdmin(v)
	case *sqlparser.UseDB:
		return c.handleUseDB(v)
	default:
		return fmt.Errorf("statement %T not support now", stmt)
	}

	return nil
}