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builtin_cast_test.go
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builtin_cast_test.go
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// Copyright 2017 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package expression
import (
"fmt"
"math"
"strconv"
"time"
. "github.com/pingcap/check"
"github.com/pingcap/parser/charset"
"github.com/pingcap/parser/mysql"
"github.com/pingcap/parser/terror"
"github.com/pingcap/tidb/types"
"github.com/pingcap/tidb/types/json"
"github.com/pingcap/tidb/util/chunk"
"github.com/pingcap/tidb/util/mock"
)
func (s *testEvaluatorSuite) TestCastXXX(c *C) {
ctx, sc := s.ctx, s.ctx.GetSessionVars().StmtCtx
// Test `cast as char[(N)]` and `cast as binary[(N)]`.
originIgnoreTruncate := sc.IgnoreTruncate
originTruncateAsWarning := sc.TruncateAsWarning
sc.IgnoreTruncate = false
sc.TruncateAsWarning = true
defer func() {
sc.IgnoreTruncate = originIgnoreTruncate
sc.TruncateAsWarning = originTruncateAsWarning
}()
tp := types.NewFieldType(mysql.TypeString)
tp.Flen = 5
// cast(str as char(N)), N < len([]rune(str)).
// cast("你好world" as char(5))
tp.Charset = charset.CharsetUTF8
f := BuildCastFunction(ctx, &Constant{Value: types.NewDatum("你好world"), RetType: tp}, tp)
res, err := f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetString(), Equals, "你好wor")
// cast(str as char(N)), N > len([]rune(str)).
// cast("a" as char(5))
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("a"), RetType: types.NewFieldType(mysql.TypeString)}, tp)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(len(res.GetString()), Equals, 1)
c.Assert(res.GetString(), Equals, "a")
// cast(str as binary(N)), N < len(str).
// cast("你好world" as binary(5))
str := "你好world"
tp.Flag |= mysql.BinaryFlag
tp.Charset = charset.CharsetBin
tp.Collate = charset.CollationBin
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum(str), RetType: types.NewFieldType(mysql.TypeString)}, tp)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetString(), Equals, str[:5])
// cast(str as binary(N)), N > len([]byte(str)).
// cast("a" as binary(5))
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("a"), RetType: types.NewFieldType(mysql.TypeString)}, tp)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(len(res.GetString()), Equals, 5)
c.Assert(res.GetString(), Equals, string([]byte{'a', 0x00, 0x00, 0x00, 0x00}))
// cast(str as binary(N)), N > len([]byte(str)).
// cast("a" as binary(4294967295))
tp.Flen = 4294967295
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("a"), RetType: types.NewFieldType(mysql.TypeString)}, tp)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.IsNull(), IsTrue)
warnings := sc.GetWarnings()
lastWarn := warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(errWarnAllowedPacketOverflowed, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
origSc := sc
oldInSelectStmt := sc.InSelectStmt
sc.InSelectStmt = true
defer func() {
sc.InSelectStmt = oldInSelectStmt
}()
sc.OverflowAsWarning = true
// cast('18446744073709551616' as unsigned);
tp1 := &types.FieldType{
Tp: mysql.TypeLonglong,
Flag: mysql.BinaryFlag,
Charset: charset.CharsetBin,
Collate: charset.CollationBin,
Flen: mysql.MaxIntWidth,
}
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("18446744073709551616"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetUint64() == math.MaxUint64, IsTrue)
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrTruncatedWrongVal, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
originFlag := tp1.Flag
tp1.Flag |= mysql.UnsignedFlag
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("-1"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetUint64() == 18446744073709551615, IsTrue)
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrCastNegIntAsUnsigned, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
tp1.Flag = originFlag
previousWarnings := len(sc.GetWarnings())
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("-1"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetInt64() == -1, IsTrue)
c.Assert(len(sc.GetWarnings()) == previousWarnings, IsTrue)
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("-18446744073709551616"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
t := math.MinInt64
// 9223372036854775808
c.Assert(res.GetUint64() == uint64(t), IsTrue)
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrTruncatedWrongVal, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
// cast('125e342.83' as unsigned)
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("125e342.83"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetUint64() == 125, IsTrue)
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrTruncatedWrongVal, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
// cast('1e9223372036854775807' as unsigned)
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("1e9223372036854775807"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetUint64() == 1, IsTrue)
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrTruncatedWrongVal, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
// cast('18446744073709551616' as signed);
mask := ^mysql.UnsignedFlag
tp1.Flag &= mask
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("18446744073709551616"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Check(res.GetInt64(), Equals, int64(-1))
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrTruncatedWrongVal, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
// cast('18446744073709551614' as signed);
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("18446744073709551614"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Check(res.GetInt64(), Equals, int64(-2))
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrCastAsSignedOverflow, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
// cast('125e342.83' as signed)
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("125e342.83"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetInt64() == 125, IsTrue)
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrTruncatedWrongVal, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
// cast('1e9223372036854775807' as signed)
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum("1e9223372036854775807"), RetType: types.NewFieldType(mysql.TypeString)}, tp1)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(res.GetInt64() == 1, IsTrue)
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrTruncatedWrongVal, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
// create table t1(s1 time);
// insert into t1 values('11:11:11');
// select cast(s1 as decimal(7, 2)) from t1;
ft := &types.FieldType{
Tp: mysql.TypeNewDecimal,
Flag: mysql.BinaryFlag | mysql.UnsignedFlag,
Charset: charset.CharsetBin,
Collate: charset.CollationBin,
Flen: 7,
Decimal: 2,
}
f = BuildCastFunction(ctx, &Constant{Value: timeDatum, RetType: types.NewFieldType(mysql.TypeDatetime)}, ft)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
resDecimal := new(types.MyDecimal)
resDecimal.FromString([]byte("99999.99"))
c.Assert(res.GetMysqlDecimal().Compare(resDecimal), Equals, 0)
warnings = sc.GetWarnings()
lastWarn = warnings[len(warnings)-1]
c.Assert(terror.ErrorEqual(types.ErrOverflow, lastWarn.Err), IsTrue, Commentf("err %v", lastWarn.Err))
sc = origSc
// create table tt(a bigint unsigned);
// insert into tt values(18446744073709551615);
// select cast(a as decimal(65, 0)) from tt;
ft = &types.FieldType{
Tp: mysql.TypeNewDecimal,
Flag: mysql.BinaryFlag,
Charset: charset.CharsetBin,
Collate: charset.CollationBin,
Flen: 65,
Decimal: 0,
}
rt := types.NewFieldType(mysql.TypeLonglong)
rt.Flag = mysql.BinaryFlag | mysql.UnsignedFlag
f = BuildCastFunction(ctx, &Constant{Value: types.NewUintDatum(18446744073709551615), RetType: rt}, ft)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
u, err := res.GetMysqlDecimal().ToUint()
c.Assert(err, IsNil)
c.Assert(u == 18446744073709551615, IsTrue)
// cast(bad_string as decimal)
for _, s := range []string{"hello", ""} {
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum(s), RetType: types.NewFieldType(mysql.TypeNewDecimal)}, tp)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
}
// cast(1234 as char(0))
tp.Flen = 0
tp.Charset = charset.CharsetUTF8
f = BuildCastFunction(ctx, &Constant{Value: types.NewDatum(1234), RetType: types.NewFieldType(mysql.TypeString)}, tp)
res, err = f.Eval(chunk.Row{})
c.Assert(err, IsNil)
c.Assert(len(res.GetString()), Equals, 0)
c.Assert(res.GetString(), Equals, "")
}
var (
year, month, day = time.Now().In(time.UTC).Date()
curDateInt = int64(year*10000 + int(month)*100 + day)
curTimeInt = curDateInt*1000000 + 125959
curTimeWithFspReal = float64(curTimeInt) + 0.555
curTimeString = fmt.Sprintf("%4d-%02d-%02d 12:59:59", year, int(month), day)
curTimeWithFspString = fmt.Sprintf("%4d-%02d-%02d 12:59:59.555000", year, int(month), day)
tm = types.NewTime(types.FromDate(year, int(month), day, 12, 59, 59, 0), mysql.TypeDatetime, types.DefaultFsp)
tmWithFsp = types.NewTime(types.FromDate(year, int(month), day, 12, 59, 59, 555000), mysql.TypeDatetime, types.MaxFsp)
// timeDatum indicates datetime "curYear-curMonth-curDay 12:59:59".
timeDatum = types.NewDatum(tm)
// timeWithFspDatum indicates datetime "curYear-curMonth-curDay 12:59:59.555000".
timeWithFspDatum = types.NewDatum(tmWithFsp)
duration = types.Duration{
Duration: 12*time.Hour + 59*time.Minute + 59*time.Second,
Fsp: types.DefaultFsp}
// durationDatum indicates duration "12:59:59".
durationDatum = types.NewDatum(duration)
durationWithFsp = types.Duration{
Duration: 12*time.Hour + 59*time.Minute + 59*time.Second + 555*time.Millisecond,
Fsp: 3}
// durationWithFspDatum indicates duration "12:59:59.555"
durationWithFspDatum = types.NewDatum(durationWithFsp)
dt = types.NewTime(types.FromDate(year, int(month), day, 0, 0, 0, 0), mysql.TypeDate, types.DefaultFsp)
// jsonInt indicates json(3)
jsonInt = types.NewDatum(json.CreateBinary(int64(3)))
// jsonTime indicates "CURRENT_DAY 12:59:59"
jsonTime = types.NewDatum(json.CreateBinary(tm.String()))
// jsonDuration indicates
jsonDuration = types.NewDatum(json.CreateBinary(duration.String()))
)
func (s *testEvaluatorSuite) TestCastFuncSig(c *C) {
ctx, sc := s.ctx, s.ctx.GetSessionVars().StmtCtx
originIgnoreTruncate := sc.IgnoreTruncate
originTZ := sc.TimeZone
sc.IgnoreTruncate = true
sc.TimeZone = time.UTC
defer func() {
sc.IgnoreTruncate = originIgnoreTruncate
sc.TimeZone = originTZ
}()
var sig builtinFunc
durationColumn := &Column{RetType: types.NewFieldType(mysql.TypeDuration), Index: 0}
durationColumn.RetType.Decimal = int(types.DefaultFsp)
// Test cast as Decimal.
castToDecCases := []struct {
before *Column
after *types.MyDecimal
row chunk.MutRow
}{
// cast int as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0},
types.NewDecFromInt(1),
chunk.MutRowFromDatums([]types.Datum{types.NewIntDatum(1)}),
},
// cast string as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
types.NewDecFromInt(1),
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum("1")}),
},
// cast real as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0},
types.NewDecFromInt(1),
chunk.MutRowFromDatums([]types.Datum{types.NewFloat64Datum(1)}),
},
// cast Time as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
types.NewDecFromInt(curTimeInt),
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
// cast Duration as decimal.
{
durationColumn,
types.NewDecFromInt(125959),
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
}
for i, t := range castToDecCases {
args := []Expression{t.before}
b, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
decFunc := newBaseBuiltinCastFunc(b, false)
decFunc.tp = types.NewFieldType(mysql.TypeNewDecimal)
switch i {
case 0:
sig = &builtinCastIntAsDecimalSig{decFunc}
case 1:
sig = &builtinCastStringAsDecimalSig{decFunc}
case 2:
sig = &builtinCastRealAsDecimalSig{decFunc}
case 3:
sig = &builtinCastTimeAsDecimalSig{decFunc}
case 4:
sig = &builtinCastDurationAsDecimalSig{decFunc}
case 5:
sig = &builtinCastDecimalAsDecimalSig{decFunc}
}
res, isNull, err := sig.evalDecimal(t.row.ToRow())
c.Assert(isNull, Equals, false)
c.Assert(err, IsNil)
c.Assert(res.Compare(t.after), Equals, 0)
}
durationColumn.RetType.Decimal = 1
castToDecCases2 := []struct {
before *Column
flen int
decimal int
after *types.MyDecimal
row chunk.MutRow
}{
// cast int as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0},
7,
3,
types.NewDecFromStringForTest("1234.000"),
chunk.MutRowFromDatums([]types.Datum{types.NewIntDatum(1234)}),
},
// cast string as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
7,
3,
types.NewDecFromStringForTest("1234.000"),
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum("1234")}),
},
// cast real as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0},
8,
4,
types.NewDecFromStringForTest("1234.1230"),
chunk.MutRowFromDatums([]types.Datum{types.NewFloat64Datum(1234.123)}),
},
// cast Time as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
15,
1,
types.NewDecFromStringForTest(strconv.FormatInt(curTimeInt, 10) + ".0"),
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
// cast Duration as decimal.
{
durationColumn,
7,
1,
types.NewDecFromStringForTest("125959.0"),
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
// cast decimal as decimal.
{
&Column{RetType: types.NewFieldType(mysql.TypeNewDecimal), Index: 0},
7,
3,
types.NewDecFromStringForTest("1234.000"),
chunk.MutRowFromDatums([]types.Datum{types.NewDecimalDatum(types.NewDecFromStringForTest("1234"))}),
},
}
for i, t := range castToDecCases2 {
args := []Expression{t.before}
tp := types.NewFieldType(mysql.TypeNewDecimal)
tp.Flen, tp.Decimal = t.flen, t.decimal
b, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
decFunc := newBaseBuiltinCastFunc(b, false)
decFunc.tp = tp
switch i {
case 0:
sig = &builtinCastIntAsDecimalSig{decFunc}
case 1:
sig = &builtinCastStringAsDecimalSig{decFunc}
case 2:
sig = &builtinCastRealAsDecimalSig{decFunc}
case 3:
sig = &builtinCastTimeAsDecimalSig{decFunc}
case 4:
sig = &builtinCastDurationAsDecimalSig{decFunc}
case 5:
sig = &builtinCastDecimalAsDecimalSig{decFunc}
}
res, isNull, err := sig.evalDecimal(t.row.ToRow())
c.Assert(isNull, Equals, false)
c.Assert(err, IsNil)
c.Assert(res.ToString(), DeepEquals, t.after.ToString())
}
durationColumn.RetType.Decimal = 0
// Test cast as int.
castToIntCases := []struct {
before *Column
after int64
row chunk.MutRow
}{
// cast string as int.
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
1,
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum("1")}),
},
// cast decimal as int.
{
&Column{RetType: types.NewFieldType(mysql.TypeNewDecimal), Index: 0},
1,
chunk.MutRowFromDatums([]types.Datum{types.NewDecimalDatum(types.NewDecFromInt(1))}),
},
// cast real as int.
{
&Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0},
1,
chunk.MutRowFromDatums([]types.Datum{types.NewFloat64Datum(1)}),
},
// cast Time as int.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
curTimeInt,
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
// cast Duration as int.
{
&Column{RetType: types.NewFieldType(mysql.TypeDuration), Index: 0},
125959,
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
// cast JSON as int.
{
&Column{RetType: types.NewFieldType(mysql.TypeJSON), Index: 0},
3,
chunk.MutRowFromDatums([]types.Datum{jsonInt}),
},
}
for i, t := range castToIntCases {
args := []Expression{t.before}
b, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
intFunc := newBaseBuiltinCastFunc(b, false)
switch i {
case 0:
sig = &builtinCastStringAsIntSig{intFunc}
case 1:
sig = &builtinCastDecimalAsIntSig{intFunc}
case 2:
sig = &builtinCastRealAsIntSig{intFunc}
case 3:
sig = &builtinCastTimeAsIntSig{intFunc}
case 4:
sig = &builtinCastDurationAsIntSig{intFunc}
case 5:
sig = &builtinCastJSONAsIntSig{intFunc}
}
res, isNull, err := sig.evalInt(t.row.ToRow())
c.Assert(isNull, Equals, false)
c.Assert(err, IsNil)
c.Assert(res, Equals, t.after)
}
// Test cast as real.
castToRealCases := []struct {
before *Column
after float64
row chunk.MutRow
}{
// cast string as real.
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
1.1,
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum("1.1")}),
},
// cast decimal as real.
{
&Column{RetType: types.NewFieldType(mysql.TypeNewDecimal), Index: 0},
1.1,
chunk.MutRowFromDatums([]types.Datum{types.NewDecimalDatum(types.NewDecFromFloatForTest(1.1))}),
},
// cast int as real.
{
&Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0},
1,
chunk.MutRowFromDatums([]types.Datum{types.NewIntDatum(1)}),
},
// cast Time as real.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
float64(curTimeInt),
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
// cast Duration as real.
{
durationColumn,
125959,
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
// cast JSON as real.
{
&Column{RetType: types.NewFieldType(mysql.TypeJSON), Index: 0},
3.0,
chunk.MutRowFromDatums([]types.Datum{jsonInt}),
},
}
for i, t := range castToRealCases {
args := []Expression{t.before}
b, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
realFunc := newBaseBuiltinCastFunc(b, false)
switch i {
case 0:
sig = &builtinCastStringAsRealSig{realFunc}
case 1:
sig = &builtinCastDecimalAsRealSig{realFunc}
case 2:
sig = &builtinCastIntAsRealSig{realFunc}
case 3:
sig = &builtinCastTimeAsRealSig{realFunc}
case 4:
sig = &builtinCastDurationAsRealSig{realFunc}
case 5:
sig = &builtinCastJSONAsRealSig{realFunc}
}
res, isNull, err := sig.evalReal(t.row.ToRow())
c.Assert(isNull, Equals, false)
c.Assert(err, IsNil)
c.Assert(res, Equals, t.after)
}
// Test cast as string.
castToStringCases := []struct {
before *Column
after string
row chunk.MutRow
}{
// cast real as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0},
"1",
chunk.MutRowFromDatums([]types.Datum{types.NewFloat64Datum(1)}),
},
// cast decimal as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeNewDecimal), Index: 0},
"1",
chunk.MutRowFromDatums([]types.Datum{types.NewDecimalDatum(types.NewDecFromInt(1))}),
},
// cast int as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0},
"1",
chunk.MutRowFromDatums([]types.Datum{types.NewIntDatum(1)}),
},
// cast time as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
curTimeString,
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
// cast duration as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeDuration), Index: 0},
"12:59:59",
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
// cast JSON as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeJSON), Index: 0},
"3",
chunk.MutRowFromDatums([]types.Datum{jsonInt}),
},
// cast string as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
"1234",
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum("1234")}),
},
}
for i, t := range castToStringCases {
tp := types.NewFieldType(mysql.TypeVarString)
tp.Charset = charset.CharsetBin
args := []Expression{t.before}
stringFunc, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
stringFunc.tp = tp
switch i {
case 0:
sig = &builtinCastRealAsStringSig{stringFunc}
case 1:
sig = &builtinCastDecimalAsStringSig{stringFunc}
case 2:
sig = &builtinCastIntAsStringSig{stringFunc}
case 3:
sig = &builtinCastTimeAsStringSig{stringFunc}
case 4:
sig = &builtinCastDurationAsStringSig{stringFunc}
case 5:
sig = &builtinCastJSONAsStringSig{stringFunc}
case 6:
sig = &builtinCastStringAsStringSig{stringFunc}
}
res, isNull, err := sig.evalString(t.row.ToRow())
c.Assert(isNull, Equals, false)
c.Assert(err, IsNil)
c.Assert(res, Equals, t.after)
}
// Test cast as string.
castToStringCases2 := []struct {
before *Column
after string
flen int
row chunk.MutRow
}{
// cast real as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0},
"123",
3,
chunk.MutRowFromDatums([]types.Datum{types.NewFloat64Datum(1234.123)}),
},
// cast decimal as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeNewDecimal), Index: 0},
"123",
3,
chunk.MutRowFromDatums([]types.Datum{types.NewDecimalDatum(types.NewDecFromStringForTest("1234.123"))}),
},
// cast int as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0},
"123",
3,
chunk.MutRowFromDatums([]types.Datum{types.NewIntDatum(1234)}),
},
// cast time as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
curTimeString[:3],
3,
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
// cast duration as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeDuration), Index: 0},
"12:",
3,
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
// cast string as string.
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
"你好w",
3,
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum("你好world")}),
},
}
for i, t := range castToStringCases2 {
args := []Expression{t.before}
tp := types.NewFieldType(mysql.TypeVarString)
tp.Flen, tp.Charset = t.flen, charset.CharsetBin
stringFunc, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
stringFunc.tp = tp
switch i {
case 0:
sig = &builtinCastRealAsStringSig{stringFunc}
case 1:
sig = &builtinCastDecimalAsStringSig{stringFunc}
case 2:
sig = &builtinCastIntAsStringSig{stringFunc}
case 3:
sig = &builtinCastTimeAsStringSig{stringFunc}
case 4:
sig = &builtinCastDurationAsStringSig{stringFunc}
case 5:
stringFunc.tp.Charset = charset.CharsetUTF8
sig = &builtinCastStringAsStringSig{stringFunc}
}
res, isNull, err := sig.evalString(t.row.ToRow())
c.Assert(isNull, Equals, false)
c.Assert(err, IsNil)
c.Assert(res, Equals, t.after)
}
castToTimeCases := []struct {
before *Column
after types.Time
row chunk.MutRow
}{
// cast real as Time.
{
&Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0},
tm,
chunk.MutRowFromDatums([]types.Datum{types.NewFloat64Datum(float64(curTimeInt))}),
},
// cast decimal as Time.
{
&Column{RetType: types.NewFieldType(mysql.TypeNewDecimal), Index: 0},
tm,
chunk.MutRowFromDatums([]types.Datum{types.NewDecimalDatum(types.NewDecFromInt(curTimeInt))}),
},
// cast int as Time.
{
&Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0},
tm,
chunk.MutRowFromDatums([]types.Datum{types.NewIntDatum(curTimeInt)}),
},
// cast string as Time.
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
tm,
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum(curTimeString)}),
},
// cast Duration as Time.
{
&Column{RetType: types.NewFieldType(mysql.TypeDuration), Index: 0},
tm,
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
// cast JSON as Time.
{
&Column{RetType: types.NewFieldType(mysql.TypeJSON), Index: 0},
tm,
chunk.MutRowFromDatums([]types.Datum{jsonTime}),
},
// cast Time as Time.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
tm,
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
}
for i, t := range castToTimeCases {
args := []Expression{t.before}
tp := types.NewFieldType(mysql.TypeDatetime)
tp.Decimal = int(types.DefaultFsp)
timeFunc, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
timeFunc.tp = tp
switch i {
case 0:
sig = &builtinCastRealAsTimeSig{timeFunc}
case 1:
sig = &builtinCastDecimalAsTimeSig{timeFunc}
case 2:
sig = &builtinCastIntAsTimeSig{timeFunc}
case 3:
sig = &builtinCastStringAsTimeSig{timeFunc}
case 4:
sig = &builtinCastDurationAsTimeSig{timeFunc}
case 5:
sig = &builtinCastJSONAsTimeSig{timeFunc}
case 6:
sig = &builtinCastTimeAsTimeSig{timeFunc}
}
res, isNull, err := sig.evalTime(t.row.ToRow())
c.Assert(err, IsNil)
c.Assert(isNull, Equals, false)
c.Assert(res.String(), Equals, t.after.String())
}
castToTimeCases2 := []struct {
before *Column
after types.Time
fsp int8
tp byte
row chunk.MutRow
}{
// cast real as Time(0).
{
&Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0},
dt,
types.DefaultFsp,
mysql.TypeDate,
chunk.MutRowFromDatums([]types.Datum{types.NewFloat64Datum(float64(curTimeInt))}),
},
// cast decimal as Date.
{
&Column{RetType: types.NewFieldType(mysql.TypeNewDecimal), Index: 0},
dt,
types.DefaultFsp,
mysql.TypeDate,
chunk.MutRowFromDatums([]types.Datum{types.NewDecimalDatum(types.NewDecFromInt(curTimeInt))}),
},
// cast int as Datetime(6).
{
&Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0},
tm,
types.MaxFsp,
mysql.TypeDatetime,
chunk.MutRowFromDatums([]types.Datum{types.NewIntDatum(curTimeInt)}),
},
// cast string as Datetime(6).
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
tm,
types.MaxFsp,
mysql.TypeDatetime,
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum(curTimeString)}),
},
// cast Duration as Date.
{
&Column{RetType: types.NewFieldType(mysql.TypeDuration), Index: 0},
dt,
types.DefaultFsp,
mysql.TypeDate,
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
// cast Time as Date.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
dt,
types.DefaultFsp,
mysql.TypeDate,
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
}
for i, t := range castToTimeCases2 {
args := []Expression{t.before}
tp := types.NewFieldType(t.tp)
tp.Decimal = int(t.fsp)
timeFunc, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
timeFunc.tp = tp
switch i {
case 0:
sig = &builtinCastRealAsTimeSig{timeFunc}
case 1:
sig = &builtinCastDecimalAsTimeSig{timeFunc}
case 2:
sig = &builtinCastIntAsTimeSig{timeFunc}
case 3:
sig = &builtinCastStringAsTimeSig{timeFunc}
case 4:
sig = &builtinCastDurationAsTimeSig{timeFunc}
case 5:
sig = &builtinCastTimeAsTimeSig{timeFunc}
}
res, isNull, err := sig.evalTime(t.row.ToRow())
c.Assert(isNull, Equals, false)
c.Assert(err, IsNil)
resAfter := t.after.String()
if t.fsp > 0 {
resAfter += "."
for i := 0; i < int(t.fsp); i++ {
resAfter += "0"
}
}
c.Assert(res.String(), Equals, resAfter)
}
castToDurationCases := []struct {
before *Column
after types.Duration
row chunk.MutRow
}{
// cast real as Duration.
{
&Column{RetType: types.NewFieldType(mysql.TypeDouble), Index: 0},
duration,
chunk.MutRowFromDatums([]types.Datum{types.NewFloat64Datum(125959)}),
},
// cast decimal as Duration.
{
&Column{RetType: types.NewFieldType(mysql.TypeNewDecimal), Index: 0},
duration,
chunk.MutRowFromDatums([]types.Datum{types.NewDecimalDatum(types.NewDecFromInt(125959))}),
},
// cast int as Duration.
{
&Column{RetType: types.NewFieldType(mysql.TypeLonglong), Index: 0},
duration,
chunk.MutRowFromDatums([]types.Datum{types.NewIntDatum(125959)}),
},
// cast string as Duration.
{
&Column{RetType: types.NewFieldType(mysql.TypeString), Index: 0},
duration,
chunk.MutRowFromDatums([]types.Datum{types.NewStringDatum("12:59:59")}),
},
// cast Time as Duration.
{
&Column{RetType: types.NewFieldType(mysql.TypeDatetime), Index: 0},
duration,
chunk.MutRowFromDatums([]types.Datum{timeDatum}),
},
// cast JSON as Duration.
{
&Column{RetType: types.NewFieldType(mysql.TypeJSON), Index: 0},
duration,
chunk.MutRowFromDatums([]types.Datum{jsonDuration}),
},
// cast Duration as Duration.
{
&Column{RetType: types.NewFieldType(mysql.TypeDuration), Index: 0},
duration,
chunk.MutRowFromDatums([]types.Datum{durationDatum}),
},
}
for i, t := range castToDurationCases {
args := []Expression{t.before}
tp := types.NewFieldType(mysql.TypeDuration)
tp.Decimal = int(types.DefaultFsp)
durationFunc, err := newBaseBuiltinFunc(ctx, "", args, 0)
c.Assert(err, IsNil)
durationFunc.tp = tp
switch i {
case 0:
sig = &builtinCastRealAsDurationSig{durationFunc}
case 1:
sig = &builtinCastDecimalAsDurationSig{durationFunc}
case 2:
sig = &builtinCastIntAsDurationSig{durationFunc}
case 3:
sig = &builtinCastStringAsDurationSig{durationFunc}
case 4:
sig = &builtinCastTimeAsDurationSig{durationFunc}
case 5:
sig = &builtinCastJSONAsDurationSig{durationFunc}
case 6:
sig = &builtinCastDurationAsDurationSig{durationFunc}
}
res, isNull, err := sig.evalDuration(t.row.ToRow())