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evaluator_test.go
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// Copyright 2015 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 evaluator
import (
"testing"
"time"
"fmt"
. "github.com/pingcap/check"
"github.com/pingcap/tidb/ast"
"github.com/pingcap/tidb/model"
"github.com/pingcap/tidb/mysql"
"github.com/pingcap/tidb/parser"
"github.com/pingcap/tidb/parser/opcode"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/util/charset"
"github.com/pingcap/tidb/util/mock"
"github.com/pingcap/tidb/util/testleak"
"github.com/pingcap/tidb/util/testutil"
"github.com/pingcap/tidb/util/types"
)
var _ = Suite(&testEvaluatorSuite{})
func TestT(t *testing.T) {
TestingT(t)
}
type testEvaluatorSuite struct {
*parser.Parser
}
func (s *testEvaluatorSuite) SetUpSuite(c *C) {
s.Parser = parser.New()
}
func (s *testEvaluatorSuite) parseExpr(c *C, expr string) ast.ExprNode {
st, err := s.ParseOneStmt("select "+expr, "", "")
c.Assert(err, IsNil)
stmt := st.(*ast.SelectStmt)
return stmt.Fields.Fields[0].Expr
}
type testCase struct {
exprStr string
resultStr string
}
func (s *testEvaluatorSuite) runTests(c *C, cases []testCase) {
ctx := mock.NewContext()
for _, ca := range cases {
expr := s.parseExpr(c, ca.exprStr)
val, err := Eval(ctx, expr)
c.Assert(err, IsNil)
valStr := fmt.Sprintf("%v", val.GetValue())
c.Assert(valStr, Equals, ca.resultStr, Commentf("for %s", ca.exprStr))
}
}
func (s *testEvaluatorSuite) TestBetween(c *C) {
defer testleak.AfterTest(c)()
cases := []testCase{
{exprStr: "1 between 2 and 3", resultStr: "0"},
{exprStr: "1 not between 2 and 3", resultStr: "1"},
}
s.runTests(c, cases)
}
func (s *testEvaluatorSuite) TestSleep(c *C) {
defer testleak.AfterTest(c)()
ctx := mock.NewContext()
variable.BindSessionVars(ctx)
sessVars := variable.GetSessionVars(ctx)
// non-strict model
sessVars.StrictSQLMode = false
d := make([]types.Datum, 1)
_, err := builtinSleep(d, nil)
c.Assert(err, NotNil)
ret, err := builtinSleep(d, ctx)
c.Assert(err, IsNil)
c.Assert(ret, DeepEquals, types.NewIntDatum(0))
d[0].SetInt64(-1)
ret, err = builtinSleep(d, ctx)
c.Assert(err, IsNil)
c.Assert(ret, DeepEquals, types.NewIntDatum(0))
// for error case under the strict model
sessVars.StrictSQLMode = true
d[0].SetNull()
_, err = builtinSleep(d, ctx)
c.Assert(err, NotNil)
d[0].SetFloat64(-2.5)
_, err = builtinSleep(d, ctx)
c.Assert(err, NotNil)
// strict model
d[0].SetFloat64(0.5)
start := time.Now()
ret, err = builtinSleep(d, ctx)
c.Assert(err, IsNil)
c.Assert(ret, DeepEquals, types.NewIntDatum(0))
sub := time.Now().Sub(start)
c.Assert(sub.Nanoseconds(), GreaterEqual, int64(0.5*1e9))
}
func (s *testEvaluatorSuite) TestBinopComparison(c *C) {
defer testleak.AfterTest(c)()
ctx := mock.NewContext()
tbl := []struct {
lhs interface{}
op opcode.Op
rhs interface{}
result int64 // 0 for false, 1 for true
}{
// test EQ
{1, opcode.EQ, 2, 0},
{false, opcode.EQ, false, 1},
{false, opcode.EQ, true, 0},
{true, opcode.EQ, true, 1},
{true, opcode.EQ, false, 0},
{"1", opcode.EQ, true, 1},
{"1", opcode.EQ, false, 0},
// test NEQ
{1, opcode.NE, 2, 1},
{false, opcode.NE, false, 0},
{false, opcode.NE, true, 1},
{true, opcode.NE, true, 0},
{"1", opcode.NE, true, 0},
{"1", opcode.NE, false, 1},
// test GT, GE
{1, opcode.GT, 0, 1},
{1, opcode.GT, 1, 0},
{1, opcode.GE, 1, 1},
{3.14, opcode.GT, 3, 1},
{3.14, opcode.GE, 3.14, 1},
// test LT, LE
{1, opcode.LT, 2, 1},
{1, opcode.LT, 1, 0},
{1, opcode.LE, 1, 1},
}
for _, t := range tbl {
expr := &ast.BinaryOperationExpr{Op: t.op, L: ast.NewValueExpr(t.lhs), R: ast.NewValueExpr(t.rhs)}
v, err := Eval(ctx, expr)
c.Assert(err, IsNil)
val, err := v.ToBool()
c.Assert(err, IsNil)
c.Assert(val, Equals, t.result)
}
// test nil
nilTbl := []struct {
lhs interface{}
op opcode.Op
rhs interface{}
}{
{nil, opcode.EQ, nil},
{nil, opcode.EQ, 1},
{nil, opcode.NE, nil},
{nil, opcode.NE, 1},
{nil, opcode.LT, nil},
{nil, opcode.LT, 1},
{nil, opcode.LE, nil},
{nil, opcode.LE, 1},
{nil, opcode.GT, nil},
{nil, opcode.GT, 1},
{nil, opcode.GE, nil},
{nil, opcode.GE, 1},
}
for _, t := range nilTbl {
expr := &ast.BinaryOperationExpr{Op: t.op, L: ast.NewValueExpr(t.lhs), R: ast.NewValueExpr(t.rhs)}
v, err := Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindNull)
}
}
func (s *testEvaluatorSuite) TestBinopLogic(c *C) {
defer testleak.AfterTest(c)()
ctx := mock.NewContext()
tbl := []struct {
lhs interface{}
op opcode.Op
rhs interface{}
ret interface{}
}{
{nil, opcode.AndAnd, 1, nil},
{nil, opcode.AndAnd, 0, 0},
{nil, opcode.OrOr, 1, 1},
{nil, opcode.OrOr, 0, nil},
{nil, opcode.LogicXor, 1, nil},
{nil, opcode.LogicXor, 0, nil},
{1, opcode.AndAnd, 0, 0},
{1, opcode.AndAnd, 1, 1},
{1, opcode.OrOr, 0, 1},
{1, opcode.OrOr, 1, 1},
{0, opcode.OrOr, 0, 0},
{1, opcode.LogicXor, 0, 1},
{1, opcode.LogicXor, 1, 0},
{0, opcode.LogicXor, 0, 0},
{0, opcode.LogicXor, 1, 1},
}
for _, t := range tbl {
expr := &ast.BinaryOperationExpr{Op: t.op, L: ast.NewValueExpr(t.lhs), R: ast.NewValueExpr(t.rhs)}
v, err := Eval(ctx, expr)
c.Assert(err, IsNil)
switch x := t.ret.(type) {
case nil:
c.Assert(v.Kind(), Equals, types.KindNull)
case int:
c.Assert(v, testutil.DatumEquals, types.NewDatum(int64(x)))
}
}
}
func (s *testEvaluatorSuite) TestBinopBitop(c *C) {
defer testleak.AfterTest(c)()
ctx := mock.NewContext()
tbl := []struct {
lhs interface{}
op opcode.Op
rhs interface{}
ret interface{}
}{
{1, opcode.And, 1, 1},
{1, opcode.Or, 1, 1},
{1, opcode.Xor, 1, 0},
{1, opcode.LeftShift, 1, 2},
{2, opcode.RightShift, 1, 1},
{nil, opcode.And, 1, nil},
{1, opcode.And, nil, nil},
{nil, opcode.Or, 1, nil},
{nil, opcode.Xor, 1, nil},
{nil, opcode.LeftShift, 1, nil},
{nil, opcode.RightShift, 1, nil},
}
for _, t := range tbl {
expr := &ast.BinaryOperationExpr{Op: t.op, L: ast.NewValueExpr(t.lhs), R: ast.NewValueExpr(t.rhs)}
v, err := Eval(ctx, expr)
c.Assert(err, IsNil)
switch x := t.ret.(type) {
case nil:
c.Assert(v.Kind(), Equals, types.KindNull)
case int:
c.Assert(v, testutil.DatumEquals, types.NewDatum(uint64(x)))
}
}
}
func (s *testEvaluatorSuite) TestBinopNumeric(c *C) {
defer testleak.AfterTest(c)()
ctx := mock.NewContext()
tbl := []struct {
lhs interface{}
op opcode.Op
rhs interface{}
ret interface{}
}{
// plus
{1, opcode.Plus, 1, 2},
{1, opcode.Plus, uint64(1), 2},
{1, opcode.Plus, "1", 2},
{1, opcode.Plus, mysql.NewDecFromInt(1), 2},
{uint64(1), opcode.Plus, 1, 2},
{uint64(1), opcode.Plus, uint64(1), 2},
{1, opcode.Plus, []byte("1"), 2},
{1, opcode.Plus, mysql.Hex{Value: 1}, 2},
{1, opcode.Plus, mysql.Bit{Value: 1, Width: 1}, 2},
{1, opcode.Plus, mysql.Enum{Name: "a", Value: 1}, 2},
{1, opcode.Plus, mysql.Set{Name: "a", Value: 1}, 2},
// minus
{1, opcode.Minus, 1, 0},
{1, opcode.Minus, uint64(1), 0},
{1, opcode.Minus, float64(1), 0},
{1, opcode.Minus, mysql.NewDecFromInt(1), 0},
{uint64(1), opcode.Minus, 1, 0},
{uint64(1), opcode.Minus, uint64(1), 0},
{mysql.NewDecFromInt(1), opcode.Minus, 1, 0},
{"1", opcode.Minus, []byte("1"), 0},
// mul
{1, opcode.Mul, 1, 1},
{1, opcode.Mul, uint64(1), 1},
{1, opcode.Mul, float64(1), 1},
{1, opcode.Mul, mysql.NewDecFromInt(1), 1},
{uint64(1), opcode.Mul, 1, 1},
{uint64(1), opcode.Mul, uint64(1), 1},
{mysql.Time{}, opcode.Mul, 0, 0},
{mysql.ZeroDuration, opcode.Mul, 0, 0},
{mysql.Time{Time: time.Now(), Fsp: 0, Type: mysql.TypeDatetime}, opcode.Mul, 0, 0},
{mysql.Time{Time: time.Now(), Fsp: 6, Type: mysql.TypeDatetime}, opcode.Mul, 0, 0},
{mysql.Duration{Duration: 100000000, Fsp: 6}, opcode.Mul, 0, 0},
// div
{1, opcode.Div, float64(1), 1},
{1, opcode.Div, float64(0), nil},
{1, opcode.Div, 2, 0.5},
{1, opcode.Div, 0, nil},
// int div
{1, opcode.IntDiv, 2, 0},
{1, opcode.IntDiv, uint64(2), 0},
{1, opcode.IntDiv, 0, nil},
{1, opcode.IntDiv, uint64(0), nil},
{uint64(1), opcode.IntDiv, 2, 0},
{uint64(1), opcode.IntDiv, uint64(2), 0},
{uint64(1), opcode.IntDiv, 0, nil},
{uint64(1), opcode.IntDiv, uint64(0), nil},
{1.0, opcode.IntDiv, 2.0, 0},
{1.0, opcode.IntDiv, 0, nil},
// mod
{10, opcode.Mod, 2, 0},
{10, opcode.Mod, uint64(2), 0},
{10, opcode.Mod, 0, nil},
{10, opcode.Mod, uint64(0), nil},
{-10, opcode.Mod, uint64(2), 0},
{uint64(10), opcode.Mod, 2, 0},
{uint64(10), opcode.Mod, uint64(2), 0},
{uint64(10), opcode.Mod, 0, nil},
{uint64(10), opcode.Mod, uint64(0), nil},
{uint64(10), opcode.Mod, -2, 0},
{float64(10), opcode.Mod, 2, 0},
{float64(10), opcode.Mod, 0, nil},
{mysql.NewDecFromInt(10), opcode.Mod, 2, 0},
{mysql.NewDecFromInt(10), opcode.Mod, 0, nil},
}
for _, t := range tbl {
expr := &ast.BinaryOperationExpr{Op: t.op, L: ast.NewValueExpr(t.lhs), R: ast.NewValueExpr(t.rhs)}
v, err := Eval(ctx, expr)
c.Assert(err, IsNil)
switch v.Kind() {
case types.KindNull:
c.Assert(t.ret, IsNil)
default:
// we use float64 as the result type check for all.
f, err := v.ToFloat64()
c.Assert(err, IsNil)
d := types.NewDatum(t.ret)
r, err := d.ToFloat64()
c.Assert(err, IsNil)
c.Assert(r, Equals, f)
}
}
}
func (s *testEvaluatorSuite) TestCaseWhen(c *C) {
defer testleak.AfterTest(c)()
cases := []testCase{
{
exprStr: "case 1 when 1 then 'str1' when 2 then 'str2' end",
resultStr: "str1",
},
{
exprStr: "case 2 when 1 then 'str1' when 2 then 'str2' end",
resultStr: "str2",
},
{
exprStr: "case 3 when 1 then 'str1' when 2 then 'str2' end",
resultStr: "<nil>",
},
{
exprStr: "case 4 when 1 then 'str1' when 2 then 'str2' else 'str3' end",
resultStr: "str3",
},
}
s.runTests(c, cases)
// When expression value changed, result set back to null.
valExpr := ast.NewValueExpr(1)
whenClause := &ast.WhenClause{Expr: ast.NewValueExpr(1), Result: ast.NewValueExpr(1)}
caseExpr := &ast.CaseExpr{
Value: valExpr,
WhenClauses: []*ast.WhenClause{whenClause},
}
ctx := mock.NewContext()
v, err := Eval(ctx, caseExpr)
c.Assert(err, IsNil)
c.Assert(v, testutil.DatumEquals, types.NewDatum(int64(1)))
valExpr.SetValue(4)
ast.ResetEvaluatedFlag(caseExpr)
v, err = Eval(ctx, caseExpr)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindNull)
}
func (s *testEvaluatorSuite) TestCall(c *C) {
defer testleak.AfterTest(c)()
ctx := mock.NewContext()
// Test case for correct number of arguments
expr := &ast.FuncCallExpr{
FnName: model.NewCIStr("date"),
Args: []ast.ExprNode{ast.NewValueExpr("2015-12-21 11:11:11")},
}
v, err := Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindMysqlTime)
c.Assert(v.GetMysqlTime().String(), Equals, "2015-12-21")
// Test case for unlimited upper bound
expr = &ast.FuncCallExpr{
FnName: model.NewCIStr("concat"),
Args: []ast.ExprNode{ast.NewValueExpr("Ti"),
ast.NewValueExpr("D"), ast.NewValueExpr("B")},
}
v, err = Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindString)
c.Assert(v.GetString(), Equals, "TiDB")
// Test case for unknown function
expr = &ast.FuncCallExpr{
FnName: model.NewCIStr("unknown"),
Args: []ast.ExprNode{},
}
_, err = Eval(ctx, expr)
c.Assert(err, NotNil)
// Test case for invalid number of arguments, violating the lower bound
expr = &ast.FuncCallExpr{
FnName: model.NewCIStr("date"),
Args: []ast.ExprNode{},
}
_, err = Eval(ctx, expr)
c.Assert(err, NotNil)
// Test case for invalid number of arguments, violating the upper bound
expr = &ast.FuncCallExpr{
FnName: model.NewCIStr("date"),
Args: []ast.ExprNode{ast.NewValueExpr("2015-12-21"),
ast.NewValueExpr("2015-12-22")},
}
_, err = Eval(ctx, expr)
c.Assert(err, NotNil)
}
func (s *testEvaluatorSuite) TestCast(c *C) {
defer testleak.AfterTest(c)()
f := types.NewFieldType(mysql.TypeLonglong)
expr := &ast.FuncCastExpr{
Expr: ast.NewValueExpr(1),
Tp: f,
}
ast.SetFlag(expr)
ctx := mock.NewContext()
v, err := Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(v, testutil.DatumEquals, types.NewDatum(int64(1)))
f.Flag |= mysql.UnsignedFlag
v, err = Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(v, testutil.DatumEquals, types.NewDatum(uint64(1)))
f.Tp = mysql.TypeString
f.Charset = charset.CharsetBin
v, err = Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(v, testutil.DatumEquals, types.NewDatum([]byte("1")))
f.Tp = mysql.TypeString
f.Charset = "utf8"
v, err = Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(v, testutil.DatumEquals, types.NewDatum("1"))
expr.Expr = ast.NewValueExpr(nil)
v, err = Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindNull)
}
func (s *testEvaluatorSuite) TestExtract(c *C) {
defer testleak.AfterTest(c)()
str := "2011-11-11 10:10:10.123456"
tbl := []struct {
Unit string
Expect int64
}{
{"MICROSECOND", 123456},
{"SECOND", 10},
{"MINUTE", 10},
{"HOUR", 10},
{"DAY", 11},
{"WEEK", 45},
{"MONTH", 11},
{"QUARTER", 4},
{"YEAR", 2011},
{"SECOND_MICROSECOND", 10123456},
{"MINUTE_MICROSECOND", 1010123456},
{"MINUTE_SECOND", 1010},
{"HOUR_MICROSECOND", 101010123456},
{"HOUR_SECOND", 101010},
{"HOUR_MINUTE", 1010},
{"DAY_MICROSECOND", 11101010123456},
{"DAY_SECOND", 11101010},
{"DAY_MINUTE", 111010},
{"DAY_HOUR", 1110},
{"YEAR_MONTH", 201111},
}
ctx := mock.NewContext()
for _, t := range tbl {
e := &ast.FuncCallExpr{
FnName: model.NewCIStr("EXTRACT"),
Args: []ast.ExprNode{ast.NewValueExpr(t.Unit), ast.NewValueExpr(str)},
}
v, err := Eval(ctx, e)
c.Assert(err, IsNil)
c.Assert(v, testutil.DatumEquals, types.NewDatum(t.Expect))
}
// Test nil
e := &ast.FuncCallExpr{
FnName: model.NewCIStr("EXTRACT"),
Args: []ast.ExprNode{ast.NewValueExpr("SECOND"), ast.NewValueExpr(nil)},
}
v, err := Eval(ctx, e)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindNull)
}
func (s *testEvaluatorSuite) TestPatternIn(c *C) {
defer testleak.AfterTest(c)()
cases := []testCase{
{
exprStr: "1 not in (1, 2, 3)",
resultStr: "0",
},
{
exprStr: "1 in (1, 2, 3)",
resultStr: "1",
},
{
exprStr: "1 in (2, 3)",
resultStr: "0",
},
{
exprStr: "NULL in (2, 3)",
resultStr: "<nil>",
},
{
exprStr: "NULL not in (2, 3)",
resultStr: "<nil>",
},
{
exprStr: "NULL in (NULL, 3)",
resultStr: "<nil>",
},
{
exprStr: "1 in (1, NULL)",
resultStr: "1",
},
{
exprStr: "1 in (NULL, 1)",
resultStr: "1",
},
{
exprStr: "2 in (1, NULL)",
resultStr: "<nil>",
},
{
exprStr: "(-(23)++46/51*+51) in (+23)",
resultStr: "0",
},
}
s.runTests(c, cases)
}
func (s *testEvaluatorSuite) TestIsNull(c *C) {
defer testleak.AfterTest(c)()
cases := []testCase{
{
exprStr: "1 IS NULL",
resultStr: "0",
},
{
exprStr: "1 IS NOT NULL",
resultStr: "1",
},
{
exprStr: "NULL IS NULL",
resultStr: "1",
},
{
exprStr: "NULL IS NOT NULL",
resultStr: "0",
},
}
s.runTests(c, cases)
}
func (s *testEvaluatorSuite) TestIsTruth(c *C) {
defer testleak.AfterTest(c)()
cases := []testCase{
{
exprStr: "1 IS TRUE",
resultStr: "1",
},
{
exprStr: "2 IS TRUE",
resultStr: "1",
},
{
exprStr: "0 IS TRUE",
resultStr: "0",
},
{
exprStr: "NULL IS TRUE",
resultStr: "0",
},
{
exprStr: "1 IS FALSE",
resultStr: "0",
},
{
exprStr: "2 IS FALSE",
resultStr: "0",
},
{
exprStr: "0 IS FALSE",
resultStr: "1",
},
{
exprStr: "NULL IS NOT FALSE",
resultStr: "1",
},
{
exprStr: "1 IS NOT TRUE",
resultStr: "0",
},
{
exprStr: "2 IS NOT TRUE",
resultStr: "0",
},
{
exprStr: "0 IS NOT TRUE",
resultStr: "1",
},
{
exprStr: "NULL IS NOT TRUE",
resultStr: "1",
},
{
exprStr: "1 IS NOT FALSE",
resultStr: "1",
},
{
exprStr: "2 IS NOT FALSE",
resultStr: "1",
},
{
exprStr: "0 IS NOT FALSE",
resultStr: "0",
},
{
exprStr: "NULL IS NOT FALSE",
resultStr: "1",
},
}
s.runTests(c, cases)
}
func (s *testEvaluatorSuite) TestLastInsertID(c *C) {
defer testleak.AfterTest(c)()
cases := []struct {
exprStr []ast.ExprNode
resultStr string
}{
{nil, "0"},
{[]ast.ExprNode{ast.NewValueExpr(1)}, "1"},
}
ctx := mock.NewContext()
variable.BindSessionVars(ctx)
c.Log(ctx)
for _, ca := range cases {
expr := &ast.FuncCallExpr{
FnName: model.NewCIStr("last_insert_id"),
Args: ca.exprStr,
}
val, err := Eval(ctx, expr)
c.Assert(err, IsNil)
valStr := fmt.Sprintf("%v", val.GetValue())
c.Assert(valStr, Equals, ca.resultStr, Commentf("for %s", ca.exprStr))
}
}
func (s *testEvaluatorSuite) TestLike(c *C) {
defer testleak.AfterTest(c)()
tbl := []struct {
pattern string
input string
escape byte
match bool
}{
{"", "a", '\\', false},
{"a", "a", '\\', true},
{"a", "b", '\\', false},
{"aA", "aA", '\\', true},
{"_", "a", '\\', true},
{"_", "ab", '\\', false},
{"__", "b", '\\', false},
{"_ab", "AAB", '\\', true},
{"%", "abcd", '\\', true},
{"%", "", '\\', true},
{"%a", "AAA", '\\', true},
{"%b", "AAA", '\\', false},
{"b%", "BBB", '\\', true},
{"%a%", "BBB", '\\', false},
{"%a%", "BAB", '\\', true},
{"a%", "BBB", '\\', false},
{`\%a`, `%a`, '\\', true},
{`\%a`, `aa`, '\\', false},
{`\_a`, `_a`, '\\', true},
{`\_a`, `aa`, '\\', false},
{`\\_a`, `\xa`, '\\', true},
{`\a\b`, `\a\b`, '\\', true},
{"%%_", `abc`, '\\', true},
{`+_a`, `_a`, '+', true},
{`+%a`, `%a`, '+', true},
{`\%a`, `%a`, '+', false},
{`++a`, `+a`, '+', true},
{`++_a`, `+xa`, '+', true},
}
for _, v := range tbl {
patChars, patTypes := compilePattern(v.pattern, v.escape)
match := doMatch(v.input, patChars, patTypes)
c.Assert(match, Equals, v.match, Commentf("%v", v))
}
cases := []testCase{
{
exprStr: "'a' LIKE ''",
resultStr: "0",
},
{
exprStr: "'a' LIKE 'a'",
resultStr: "1",
},
{
exprStr: "'a' LIKE 'b'",
resultStr: "0",
},
{
exprStr: "'aA' LIKE 'Aa'",
resultStr: "1",
},
{
exprStr: "'aAb' LIKE 'Aa%'",
resultStr: "1",
},
{
exprStr: "'aAb' LIKE 'Aa_'",
resultStr: "1",
},
}
s.runTests(c, cases)
}
func (s *testEvaluatorSuite) TestRegexp(c *C) {
defer testleak.AfterTest(c)()
tbl := []struct {
pattern string
input string
match int64
}{
{"^$", "a", 0},
{"a", "a", 1},
{"a", "b", 0},
{"aA", "aA", 1},
{".", "a", 1},
{"^.$", "ab", 0},
{"..", "b", 0},
{".ab", "aab", 1},
{".*", "abcd", 1},
}
ctx := mock.NewContext()
for _, v := range tbl {
pattern := &ast.PatternRegexpExpr{
Pattern: ast.NewValueExpr(v.pattern),
Expr: ast.NewValueExpr(v.input),
}
match, err := Eval(ctx, pattern)
c.Assert(err, IsNil)
c.Assert(match, testutil.DatumEquals, types.NewDatum(v.match), Commentf("%v", v))
}
}
func (s *testEvaluatorSuite) TestUnaryOp(c *C) {
defer testleak.AfterTest(c)()
tbl := []struct {
arg interface{}
op opcode.Op
result interface{}
}{
// test NOT.
{1, opcode.Not, int64(0)},
{0, opcode.Not, int64(1)},
{nil, opcode.Not, nil},
{mysql.Hex{Value: 0}, opcode.Not, int64(1)},
{mysql.Bit{Value: 0, Width: 1}, opcode.Not, int64(1)},
{mysql.Enum{Name: "a", Value: 1}, opcode.Not, int64(0)},
{mysql.Set{Name: "a", Value: 1}, opcode.Not, int64(0)},
// test BitNeg.
{nil, opcode.BitNeg, nil},
{-1, opcode.BitNeg, uint64(0)},
// test Plus.
{nil, opcode.Plus, nil},
{float64(1.0), opcode.Plus, float64(1.0)},
{int64(1), opcode.Plus, int64(1)},
{int64(1), opcode.Plus, int64(1)},
{uint64(1), opcode.Plus, uint64(1)},
{"1.0", opcode.Plus, "1.0"},
{[]byte("1.0"), opcode.Plus, []byte("1.0")},
{mysql.Hex{Value: 1}, opcode.Plus, mysql.Hex{Value: 1}},
{mysql.Bit{Value: 1, Width: 1}, opcode.Plus, mysql.Bit{Value: 1, Width: 1}},
{true, opcode.Plus, int64(1)},
{false, opcode.Plus, int64(0)},
{mysql.Enum{Name: "a", Value: 1}, opcode.Plus, mysql.Enum{Name: "a", Value: 1}},
{mysql.Set{Name: "a", Value: 1}, opcode.Plus, mysql.Set{Name: "a", Value: 1}},
// test Minus.
{nil, opcode.Minus, nil},
{float64(1.0), opcode.Minus, float64(-1.0)},
{int64(1), opcode.Minus, int64(-1)},
{int64(1), opcode.Minus, int64(-1)},
{uint64(1), opcode.Minus, -int64(1)},
{"1.0", opcode.Minus, -1.0},
{[]byte("1.0"), opcode.Minus, -1.0},
{mysql.Hex{Value: 1}, opcode.Minus, -1.0},
{mysql.Bit{Value: 1, Width: 1}, opcode.Minus, -1.0},
{true, opcode.Minus, int64(-1)},
{false, opcode.Minus, int64(0)},
{mysql.Enum{Name: "a", Value: 1}, opcode.Minus, -1.0},
{mysql.Set{Name: "a", Value: 1}, opcode.Minus, -1.0},
}
ctx := mock.NewContext()
for i, t := range tbl {
expr := &ast.UnaryOperationExpr{}
expr.Op = t.op
expr.V = ast.NewValueExpr(t.arg)
result, err := Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(result, testutil.DatumEquals, types.NewDatum(t.result), Commentf("%d", i))
}
tbl = []struct {
arg interface{}
op opcode.Op
result interface{}
}{
{mysql.NewDecFromInt(1), opcode.Plus, mysql.NewDecFromInt(1)},
{mysql.Duration{Duration: time.Duration(838*3600 + 59*60 + 59), Fsp: mysql.DefaultFsp}, opcode.Plus,
mysql.Duration{Duration: time.Duration(838*3600 + 59*60 + 59), Fsp: mysql.DefaultFsp}},
{mysql.Time{Time: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), Type: mysql.TypeDatetime, Fsp: 0}, opcode.Plus, mysql.Time{Time: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), Type: mysql.TypeDatetime, Fsp: 0}},
{mysql.NewDecFromInt(1), opcode.Minus, mysql.NewDecFromInt(-1)},
{mysql.ZeroDuration, opcode.Minus, new(mysql.MyDecimal)},
{mysql.Time{Time: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC), Type: mysql.TypeDatetime, Fsp: 0}, opcode.Minus, mysql.NewDecFromInt(-20091110230000)},
}
for _, t := range tbl {
expr := &ast.UnaryOperationExpr{Op: t.op, V: ast.NewValueExpr(t.arg)}
result, err := Eval(ctx, expr)
c.Assert(err, IsNil)
ret, err := result.CompareDatum(types.NewDatum(t.result))
c.Assert(err, IsNil)
c.Assert(ret, Equals, 0)
}
}
func (s *testEvaluatorSuite) TestColumnNameExpr(c *C) {
defer testleak.AfterTest(c)()
ctx := mock.NewContext()
value1 := ast.NewValueExpr(1)
rf := &ast.ResultField{Expr: value1}
expr := &ast.ColumnNameExpr{Refer: rf}
ast.SetFlag(expr)
result, err := Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(result, testutil.DatumEquals, types.NewDatum(int64(1)))
value2 := ast.NewValueExpr(2)
rf.Expr = value2
result, err = Eval(ctx, expr)
c.Assert(err, IsNil)
c.Assert(result, testutil.DatumEquals, types.NewDatum(int64(2)))
}
func (s *testEvaluatorSuite) TestAggFuncAvg(c *C) {
defer testleak.AfterTest(c)()
ctx := mock.NewContext()
avg := &ast.AggregateFuncExpr{
F: ast.AggFuncAvg,
}
avg.CurrentGroup = []byte("emptyGroup")
ast.SetFlag(avg)
result, err := Eval(ctx, avg)
c.Assert(err, IsNil)
// Empty group should return nil.
c.Assert(result.Kind(), Equals, types.KindNull)
avg.Args = []ast.ExprNode{ast.NewValueExpr(2)}
avg.Update()
avg.Args = []ast.ExprNode{ast.NewValueExpr(4)}
avg.Update()
result, err = Eval(ctx, avg)
c.Assert(err, IsNil)
expect := mysql.NewDecFromInt(3)
c.Assert(result.Kind(), Equals, types.KindMysqlDecimal)
c.Assert(result.GetMysqlDecimal().Compare(expect), Equals, 0)
}
func (s *testEvaluatorSuite) TestGetTimeValue(c *C) {
defer testleak.AfterTest(c)()
v, err := GetTimeValue(nil, "2012-12-12 00:00:00", mysql.TypeTimestamp, mysql.MinFsp)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindMysqlTime)
timeValue := v.GetMysqlTime()
c.Assert(timeValue.String(), Equals, "2012-12-12 00:00:00")
ctx := mock.NewContext()
variable.BindSessionVars(ctx)
sessionVars := variable.GetSessionVars(ctx)
sessionVars.SetSystemVar("timestamp", types.NewStringDatum(""))
v, err = GetTimeValue(ctx, "2012-12-12 00:00:00", mysql.TypeTimestamp, mysql.MinFsp)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindMysqlTime)
timeValue = v.GetMysqlTime()
c.Assert(timeValue.String(), Equals, "2012-12-12 00:00:00")
sessionVars.SetSystemVar("timestamp", types.NewStringDatum("0"))
v, err = GetTimeValue(ctx, "2012-12-12 00:00:00", mysql.TypeTimestamp, mysql.MinFsp)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindMysqlTime)
timeValue = v.GetMysqlTime()
c.Assert(timeValue.String(), Equals, "2012-12-12 00:00:00")
sessionVars.SetSystemVar("timestamp", types.Datum{})
v, err = GetTimeValue(ctx, "2012-12-12 00:00:00", mysql.TypeTimestamp, mysql.MinFsp)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindMysqlTime)
timeValue = v.GetMysqlTime()
c.Assert(timeValue.String(), Equals, "2012-12-12 00:00:00")
sessionVars.SetSystemVar("timestamp", types.NewStringDatum("1234"))
tbl := []struct {
Expr interface{}
Ret interface{}
}{
{"2012-12-12 00:00:00", "2012-12-12 00:00:00"},
{CurrentTimestamp, time.Unix(1234, 0).Format(mysql.TimeFormat)},
{ZeroTimestamp, "0000-00-00 00:00:00"},
{ast.NewValueExpr("2012-12-12 00:00:00"), "2012-12-12 00:00:00"},
{ast.NewValueExpr(int64(0)), "0000-00-00 00:00:00"},
{ast.NewValueExpr(nil), nil},
{&ast.FuncCallExpr{FnName: model.NewCIStr(CurrentTimestamp)}, CurrentTimestamp},
{&ast.UnaryOperationExpr{Op: opcode.Minus, V: ast.NewValueExpr(int64(0))}, "0000-00-00 00:00:00"},
}
for i, t := range tbl {
comment := Commentf("expr: %d", i)
v, err := GetTimeValue(ctx, t.Expr, mysql.TypeTimestamp, mysql.MinFsp)
c.Assert(err, IsNil)
switch v.Kind() {
case types.KindMysqlTime: