415085546b
Conflicts: expression/variable.go parser/scanner.l plan/plans/show.go plan/plans/show_test.go stmt/stmts/set.go
87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package expression
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import (
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/context"
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"github.com/pingcap/tidb/sessionctx/variable"
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"github.com/pingcap/tidb/util/mock"
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)
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var _ = Suite(&testVariableSuite{})
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type testVariableSuite struct {
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ctx context.Context
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}
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func (s *testVariableSuite) SetUpSuite(c *C) {
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nc := mock.NewContext()
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s.ctx = nc
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variable.BindSessionVars(s.ctx)
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variable.BindGlobalVarAccessor(s.ctx, nc)
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}
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func (s *testVariableSuite) TestVariable(c *C) {
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name := "timestamp"
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e := &Variable{
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Name: name,
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IsGlobal: false,
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IsSystem: true,
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}
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c.Assert(e.IsStatic(), IsFalse)
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c.Assert(e.String(), Equals, "@@"+name)
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v, err := e.Eval(s.ctx, nil)
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c.Assert(err, IsNil)
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c.Assert(v, Equals, "")
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sessionVars := variable.GetSessionVars(s.ctx)
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sessionVars.Systems[name] = "1234"
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v, err = e.Eval(s.ctx, nil)
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c.Assert(err, IsNil)
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c.Assert(v, Equals, "1234")
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ec := e.Clone()
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e2, ok := ec.(*Variable)
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c.Assert(ok, IsTrue)
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e2.IsGlobal = true
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c.Assert(e2.String(), Equals, "@@GLOBAL."+name)
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e2.IsSystem = false
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c.Assert(e2.String(), Equals, "@"+name)
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v, err = e2.Eval(s.ctx, nil)
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c.Assert(err, IsNil)
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c.Assert(v, IsNil)
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sessionVars.Users[name] = "5678"
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v, err = e2.Eval(s.ctx, nil)
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c.Assert(err, IsNil)
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c.Assert(v, Equals, "5678")
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// check error.
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e2.Name = "xxx"
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e2.IsSystem = true
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_, err = e2.Eval(s.ctx, nil)
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c.Assert(err, NotNil)
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}
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