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63 lines
2.2 KiB
63 lines
2.2 KiB
// Copyright 2017 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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"time"
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. "github.com/pingcap/check"
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"github.com/pingcap/parser/ast"
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"github.com/pingcap/parser/mysql"
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"github.com/pingcap/tidb/sessionctx/stmtctx"
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"github.com/pingcap/tidb/types"
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)
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func (s *testEvaluatorSuite) TestScalarFunction(c *C) {
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a := &Column{
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UniqueID: 1,
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RetType: types.NewFieldType(mysql.TypeDouble),
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}
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sc := &stmtctx.StatementContext{TimeZone: time.Local}
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sf := newFunction(ast.LT, a, NewOne())
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res, err := sf.MarshalJSON()
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c.Assert(err, IsNil)
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c.Assert(res, DeepEquals, []byte{0x22, 0x6c, 0x74, 0x28, 0x43, 0x6f, 0x6c, 0x75, 0x6d, 0x6e, 0x23, 0x31, 0x2c, 0x20, 0x31, 0x29, 0x22})
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c.Assert(sf.IsCorrelated(), IsFalse)
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c.Assert(sf.ConstItem(s.ctx.GetSessionVars().StmtCtx), IsFalse)
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c.Assert(sf.Decorrelate(nil).Equal(s.ctx, sf), IsTrue)
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c.Assert(sf.HashCode(sc), DeepEquals, []byte{0x3, 0x4, 0x6c, 0x74, 0x1, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x5, 0xbf, 0xf0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0})
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sf = NewValuesFunc(s.ctx, 0, types.NewFieldType(mysql.TypeLonglong))
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newSf, ok := sf.Clone().(*ScalarFunction)
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c.Assert(ok, IsTrue)
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c.Assert(newSf.FuncName.O, Equals, "values")
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c.Assert(newSf.RetType.Tp, Equals, mysql.TypeLonglong)
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_, ok = newSf.Function.(*builtinValuesIntSig)
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c.Assert(ok, IsTrue)
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}
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func (s *testEvaluatorSuite) TestScalarFuncs2Exprs(c *C) {
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a := &Column{
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UniqueID: 1,
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RetType: types.NewFieldType(mysql.TypeDouble),
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}
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sf0, _ := newFunction(ast.LT, a, NewZero()).(*ScalarFunction)
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sf1, _ := newFunction(ast.LT, a, NewOne()).(*ScalarFunction)
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funcs := []*ScalarFunction{sf0, sf1}
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exprs := ScalarFuncs2Exprs(funcs)
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for i := range exprs {
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c.Assert(exprs[i].Equal(s.ctx, funcs[i]), IsTrue)
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}
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}
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