4ced2f7e10
Support ISNULL(), LTRIM(), RTRIM(), LCASE() and UCASE(). Add alias for LOWER() and UPPER().
84 lines
2.2 KiB
Go
84 lines
2.2 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 evaluator
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import (
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"reflect"
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/util/testleak"
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"github.com/pingcap/tidb/util/testutil"
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"github.com/pingcap/tidb/util/types"
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)
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// tblToDtbl is a util function for test.
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func tblToDtbl(i interface{}) []map[string][]types.Datum {
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l := reflect.ValueOf(i).Len()
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tbl := make([]map[string][]types.Datum, l)
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for j := 0; j < l; j++ {
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v := reflect.ValueOf(i).Index(j).Interface()
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val := reflect.ValueOf(v)
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t := reflect.TypeOf(v)
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item := make(map[string][]types.Datum, val.NumField())
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for k := 0; k < val.NumField(); k++ {
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tmp := val.Field(k).Interface()
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item[t.Field(k).Name] = makeDatums(tmp)
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}
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tbl[j] = item
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}
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return tbl
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}
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func makeDatums(i interface{}) []types.Datum {
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if i != nil {
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t := reflect.TypeOf(i)
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val := reflect.ValueOf(i)
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switch t.Kind() {
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case reflect.Slice:
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l := val.Len()
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res := make([]types.Datum, l)
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for j := 0; j < l; j++ {
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res[j] = types.NewDatum(val.Index(j).Interface())
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}
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return res
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}
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}
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return types.MakeDatums(i)
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}
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func (s *testEvaluatorSuite) TestCoalesce(c *C) {
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defer testleak.AfterTest(c)()
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args := types.MakeDatums(1, nil)
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v, err := builtinCoalesce(args, nil)
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c.Assert(err, IsNil)
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c.Assert(v, testutil.DatumEquals, types.NewDatum(1))
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args = types.MakeDatums(nil, nil)
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v, err = builtinCoalesce(args, nil)
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c.Assert(err, IsNil)
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c.Assert(v, testutil.DatumEquals, types.NewDatum(nil))
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}
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func (s *testEvaluatorSuite) TestIsNullFunc(c *C) {
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defer testleak.AfterTest(c)()
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v, err := builtinIsNull(types.MakeDatums(1), nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetInt64(), Equals, int64(0))
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v, err = builtinIsNull(types.MakeDatums(nil), nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetInt64(), Equals, int64(1))
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}
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