// Copyright 2016 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 ( "strings" "time" . "github.com/pingcap/check" "github.com/pingcap/parser/ast" "github.com/pingcap/parser/charset" "github.com/pingcap/parser/model" "github.com/pingcap/parser/mysql" "github.com/pingcap/tidb/sessionctx/variable" "github.com/pingcap/tidb/types" driver "github.com/pingcap/tidb/types/parser_driver" "github.com/pingcap/tidb/util/mock" ) func (s *testExpressionSuite) TestGetTimeValue(c *C) { ctx := mock.NewContext() v, err := GetTimeValue(ctx, "2012-12-12 00:00:00", mysql.TypeTimestamp, types.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 := ctx.GetSessionVars() variable.SetSessionSystemVar(sessionVars, "timestamp", types.NewStringDatum("")) v, err = GetTimeValue(ctx, "2012-12-12 00:00:00", mysql.TypeTimestamp, types.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") variable.SetSessionSystemVar(sessionVars, "timestamp", types.NewStringDatum("0")) v, err = GetTimeValue(ctx, "2012-12-12 00:00:00", mysql.TypeTimestamp, types.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") variable.SetSessionSystemVar(sessionVars, "timestamp", types.Datum{}) v, err = GetTimeValue(ctx, "2012-12-12 00:00:00", mysql.TypeTimestamp, types.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") variable.SetSessionSystemVar(sessionVars, "timestamp", types.NewStringDatum("1234")) tbl := []struct { Expr interface{} Ret interface{} }{ {"2012-12-12 00:00:00", "2012-12-12 00:00:00"}, {ast.CurrentTimestamp, time.Unix(1234, 0).Format(types.TimeFormat)}, {types.ZeroDatetimeStr, "0000-00-00 00:00:00"}, {ast.NewValueExpr("2012-12-12 00:00:00", charset.CharsetUTF8MB4, charset.CollationUTF8MB4), "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(ast.CurrentTimestamp)}, strings.ToUpper(ast.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, types.MinFsp) c.Assert(err, IsNil) switch v.Kind() { case types.KindMysqlTime: c.Assert(v.GetMysqlTime().String(), DeepEquals, t.Ret, comment) default: c.Assert(v.GetValue(), DeepEquals, t.Ret, comment) } } errTbl := []struct { Expr interface{} }{ {"2012-13-12 00:00:00"}, {ast.NewValueExpr("2012-13-12 00:00:00", charset.CharsetUTF8MB4, charset.CollationUTF8MB4)}, {ast.NewValueExpr(int64(1), "", "")}, {&ast.FuncCallExpr{FnName: model.NewCIStr("xxx")}}, //{&ast.UnaryOperationExpr{Op: opcode.Minus, V: ast.NewValueExpr(int64(1))}}, } for _, t := range errTbl { _, err := GetTimeValue(ctx, t.Expr, mysql.TypeTimestamp, types.MinFsp) c.Assert(err, NotNil) } } func (s *testExpressionSuite) TestIsCurrentTimestampExpr(c *C) { buildTimestampFuncCallExpr := func(i int64) *ast.FuncCallExpr { var args []ast.ExprNode if i != 0 { args = []ast.ExprNode{&driver.ValueExpr{Datum: types.NewIntDatum(i)}} } return &ast.FuncCallExpr{FnName: model.NewCIStr("CURRENT_TIMESTAMP"), Args: args} } v := IsValidCurrentTimestampExpr(ast.NewValueExpr("abc", charset.CharsetUTF8MB4, charset.CollationUTF8MB4), nil) c.Assert(v, IsFalse) v = IsValidCurrentTimestampExpr(buildTimestampFuncCallExpr(0), nil) c.Assert(v, IsTrue) v = IsValidCurrentTimestampExpr(buildTimestampFuncCallExpr(3), &types.FieldType{Decimal: 3}) c.Assert(v, IsTrue) v = IsValidCurrentTimestampExpr(buildTimestampFuncCallExpr(1), &types.FieldType{Decimal: 3}) c.Assert(v, IsFalse) v = IsValidCurrentTimestampExpr(buildTimestampFuncCallExpr(0), &types.FieldType{Decimal: 3}) c.Assert(v, IsFalse) v = IsValidCurrentTimestampExpr(buildTimestampFuncCallExpr(2), &types.FieldType{Decimal: 0}) c.Assert(v, IsFalse) v = IsValidCurrentTimestampExpr(buildTimestampFuncCallExpr(2), nil) c.Assert(v, IsFalse) } func (s *testExpressionSuite) TestCurrentTimestampTimeZone(c *C) { ctx := mock.NewContext() sessionVars := ctx.GetSessionVars() variable.SetSessionSystemVar(sessionVars, "timestamp", types.NewStringDatum("1234")) variable.SetSessionSystemVar(sessionVars, "time_zone", types.NewStringDatum("+00:00")) v, err := GetTimeValue(ctx, ast.CurrentTimestamp, mysql.TypeTimestamp, types.MinFsp) c.Assert(err, IsNil) c.Assert(v.GetMysqlTime(), DeepEquals, types.NewTime( types.FromDate(1970, 1, 1, 0, 20, 34, 0), mysql.TypeTimestamp, types.DefaultFsp)) // CurrentTimestamp from "timestamp" session variable is based on UTC, so change timezone // would get different value. variable.SetSessionSystemVar(sessionVars, "time_zone", types.NewStringDatum("+08:00")) v, err = GetTimeValue(ctx, ast.CurrentTimestamp, mysql.TypeTimestamp, types.MinFsp) c.Assert(err, IsNil) c.Assert(v.GetMysqlTime(), DeepEquals, types.NewTime( types.FromDate(1970, 1, 1, 8, 20, 34, 0), mysql.TypeTimestamp, types.DefaultFsp)) }