214 lines
6.4 KiB
Go
214 lines
6.4 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 expression
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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/ast"
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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, s.ctx)
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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, s.ctx)
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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) TestGreatestLeastFuncs(c *C) {
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defer testleak.AfterTest(c)()
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var datums []types.Datum
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datums = types.MakeDatums(2, 0)
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greatest := funcs[ast.Greatest]
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f, err := greatest.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err := f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetInt64(), Equals, int64(2))
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least := funcs[ast.Least]
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f, err = least.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetInt64(), Equals, int64(0))
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datums = types.MakeDatums(34.0, 3.0, 5.0, 767.0)
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f, err = greatest.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetFloat64(), Equals, float64(767.0))
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f, err = least.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetFloat64(), Equals, float64(3.0))
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datums = types.MakeDatums("B", "A", "C")
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f, err = greatest.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetString(), Equals, "C")
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f, err = least.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetString(), Equals, "A")
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// GREATEST() and LEAST() return NULL if any argument is NULL.
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datums = types.MakeDatums(nil, 1, 2)
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f, err = greatest.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.IsNull(), IsTrue)
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f, err = least.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.IsNull(), IsTrue)
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datums = types.MakeDatums(1, nil, 2)
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f, err = greatest.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.IsNull(), IsTrue)
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f, err = least.getFunction(datumsToConstants(datums), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.IsNull(), IsTrue)
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}
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func (s *testEvaluatorSuite) TestIntervalFunc(c *C) {
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defer testleak.AfterTest(c)()
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for _, t := range []struct {
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args []types.Datum
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ret int64
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}{
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{types.MakeDatums(nil, 1, 2), -1},
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{types.MakeDatums(1, 2, 3), 0},
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{types.MakeDatums(2, 1, 3), 1},
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{types.MakeDatums(3, 1, 2), 2},
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{types.MakeDatums(0, "b", "1", "2"), 1},
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{types.MakeDatums("a", "b", "1", "2"), 1},
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{types.MakeDatums(23, 1, 23, 23, 23, 30, 44, 200), 4},
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{types.MakeDatums(23, 1.7, 15.3, 23.1, 30, 44, 200), 2},
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{types.MakeDatums(9007199254740992, 9007199254740993), 0},
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{types.MakeDatums(uint64(9223372036854775808), uint64(9223372036854775809)), 0},
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{types.MakeDatums(9223372036854775807, uint64(9223372036854775808)), 0},
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{types.MakeDatums(-9223372036854775807, uint64(9223372036854775808)), 0},
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{types.MakeDatums(uint64(9223372036854775806), 9223372036854775807), 0},
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{types.MakeDatums(uint64(9223372036854775806), -9223372036854775807), 1},
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{types.MakeDatums("9007199254740991", "9007199254740992"), 0},
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// tests for appropriate precision loss
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{types.MakeDatums(9007199254740992, "9007199254740993"), 1},
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{types.MakeDatums("9007199254740992", 9007199254740993), 1},
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{types.MakeDatums("9007199254740992", "9007199254740993"), 1},
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} {
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fc := funcs[ast.Interval]
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f, err := fc.getFunction(datumsToConstants(t.args), s.ctx)
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c.Assert(err, IsNil)
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v, err := f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetInt64(), Equals, t.ret)
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}
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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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fc := funcs[ast.IsNull]
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f, err := fc.getFunction(datumsToConstants(types.MakeDatums(1)), s.ctx)
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c.Assert(err, IsNil)
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v, err := f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetInt64(), Equals, int64(0))
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f, err = fc.getFunction(datumsToConstants(types.MakeDatums(nil)), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(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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func (s *testEvaluatorSuite) TestLock(c *C) {
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defer testleak.AfterTest(c)()
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lock := funcs[ast.GetLock]
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f, err := lock.getFunction(datumsToConstants(types.MakeDatums(nil, 1)), s.ctx)
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c.Assert(err, IsNil)
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v, err := f.eval(nil)
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c.Assert(err, IsNil)
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c.Assert(v.GetInt64(), Equals, int64(1))
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releaseLock := funcs[ast.ReleaseLock]
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f, err = releaseLock.getFunction(datumsToConstants(types.MakeDatums(1)), s.ctx)
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c.Assert(err, IsNil)
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v, err = f.eval(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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