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147 lines
4.4 KiB
147 lines
4.4 KiB
// 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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"errors"
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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/tidb/types"
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"github.com/pingcap/tidb/util/chunk"
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"github.com/pingcap/tidb/util/testutil"
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)
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func (s *testEvaluatorSuite) TestCaseWhen(c *C) {
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tbl := []struct {
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Arg []interface{}
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Ret interface{}
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}{
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{[]interface{}{true, 1, true, 2, 3}, 1},
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{[]interface{}{false, 1, true, 2, 3}, 2},
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{[]interface{}{nil, 1, true, 2, 3}, 2},
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{[]interface{}{false, 1, false, 2, 3}, 3},
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{[]interface{}{nil, 1, nil, 2, 3}, 3},
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{[]interface{}{false, 1, nil, 2, 3}, 3},
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{[]interface{}{nil, 1, false, 2, 3}, 3},
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{[]interface{}{1, jsonInt.GetMysqlJSON(), nil}, 3},
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{[]interface{}{0, jsonInt.GetMysqlJSON(), nil}, nil},
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{[]interface{}{0.1, 1, 2}, 1},
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{[]interface{}{0.0, 1, 0.1, 2}, 2},
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}
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fc := funcs[ast.Case]
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for _, t := range tbl {
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f, err := fc.getFunction(s.ctx, s.datumsToConstants(types.MakeDatums(t.Arg...)))
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c.Assert(err, IsNil)
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d, err := evalBuiltinFunc(f, chunk.Row{})
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c.Assert(err, IsNil)
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c.Assert(d, testutil.DatumEquals, types.NewDatum(t.Ret))
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}
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f, err := fc.getFunction(s.ctx, s.datumsToConstants(types.MakeDatums(errors.New("can't convert string to bool"), 1, true)))
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c.Assert(err, IsNil)
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_, err = evalBuiltinFunc(f, chunk.Row{})
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c.Assert(err, NotNil)
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}
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func (s *testEvaluatorSuite) TestIf(c *C) {
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stmtCtx := s.ctx.GetSessionVars().StmtCtx
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origin := stmtCtx.IgnoreTruncate
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stmtCtx.IgnoreTruncate = true
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defer func() {
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stmtCtx.IgnoreTruncate = origin
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}()
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tbl := []struct {
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Arg1 interface{}
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Arg2 interface{}
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Arg3 interface{}
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Ret interface{}
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}{
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{1, 1, 2, 1},
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{nil, 1, 2, 2},
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{0, 1, 2, 2},
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{"abc", 1, 2, 2},
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{"1abc", 1, 2, 1},
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{tm, 1, 2, 1},
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{duration, 1, 2, 1},
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{types.Duration{Duration: time.Duration(0)}, 1, 2, 2},
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{types.NewDecFromStringForTest("1.2"), 1, 2, 1},
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{jsonInt.GetMysqlJSON(), 1, 2, 1},
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{0.1, 1, 2, 1},
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{0.0, 1, 2, 2},
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{types.NewDecFromStringForTest("0.1"), 1, 2, 1},
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{types.NewDecFromStringForTest("0.0"), 1, 2, 2},
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{"0.1", 1, 2, 1},
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{"0.0", 1, 2, 2},
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}
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fc := funcs[ast.If]
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for _, t := range tbl {
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f, err := fc.getFunction(s.ctx, s.datumsToConstants(types.MakeDatums(t.Arg1, t.Arg2, t.Arg3)))
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c.Assert(err, IsNil)
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d, err := evalBuiltinFunc(f, chunk.Row{})
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c.Assert(err, IsNil)
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c.Assert(d, testutil.DatumEquals, types.NewDatum(t.Ret))
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}
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f, err := fc.getFunction(s.ctx, s.datumsToConstants(types.MakeDatums(errors.New("must error"), 1, 2)))
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c.Assert(err, IsNil)
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_, err = evalBuiltinFunc(f, chunk.Row{})
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c.Assert(err, NotNil)
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_, err = fc.getFunction(s.ctx, s.datumsToConstants(types.MakeDatums(1, 2)))
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c.Assert(err, NotNil)
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}
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func (s *testEvaluatorSuite) TestIfNull(c *C) {
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tbl := []struct {
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arg1 interface{}
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arg2 interface{}
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expected interface{}
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isNil bool
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getErr bool
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}{
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{1, 2, int64(1), false, false},
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{nil, 2, int64(2), false, false},
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{nil, nil, nil, true, false},
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{tm, nil, tm, false, false},
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{nil, duration, duration, false, false},
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{nil, types.NewDecFromFloatForTest(123.123), types.NewDecFromFloatForTest(123.123), false, false},
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{nil, types.NewBinaryLiteralFromUint(0x01, -1), uint64(1), false, false},
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{nil, types.Set{Value: 1, Name: "abc"}, "abc", false, false},
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{nil, jsonInt.GetMysqlJSON(), jsonInt.GetMysqlJSON(), false, false},
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{"abc", nil, "abc", false, false},
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{errors.New(""), nil, "", true, true},
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}
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for _, t := range tbl {
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f, err := newFunctionForTest(s.ctx, ast.Ifnull, s.primitiveValsToConstants([]interface{}{t.arg1, t.arg2})...)
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c.Assert(err, IsNil)
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d, err := f.Eval(chunk.Row{})
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if t.getErr {
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c.Assert(err, NotNil)
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} else {
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c.Assert(err, IsNil)
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if t.isNil {
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c.Assert(d.Kind(), Equals, types.KindNull)
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} else {
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c.Assert(d.GetValue(), DeepEquals, t.expected)
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}
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}
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}
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_, err := funcs[ast.Ifnull].getFunction(s.ctx, []Expression{NewZero(), NewZero()})
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c.Assert(err, IsNil)
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_, err = funcs[ast.Ifnull].getFunction(s.ctx, []Expression{NewZero()})
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c.Assert(err, NotNil)
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}
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