wrong RegardNULLAsPoint value in the interal sql

[hawkingrei]

Bug Report

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1. Minimal reproduce step (Required)

add assertion like

2. What did you expect to see? (Required)

success to run.

3. What did you see instead (Required)

fail to run

--- FAIL: TestGetOracleTime (35.78s)
panic: assert failed [recovered]
	panic: assert failed [recovered]
	panic: assert failed
goroutine 122 [running]:
testing.tRunner.func1.2({0x8f63d40, 0xc0089bced0})
	GOROOT/src/testing/testing.go:1632 +0x3fc
testing.tRunner.func1()
	GOROOT/src/testing/testing.go:1635 +0x6b6
panic({0x8f63d40?, 0xc0089bced0?})
	GOROOT/src/runtime/panic.go:791 +0x132
github.com/pingcap/tidb/pkg/executor.(*Compiler).Compile.func1()
	pkg/executor/compiler.go:59 +0x5a5
panic({0x8f63d40?, 0xc0089bced0?})
	GOROOT/src/runtime/panic.go:791 +0x132
github.com/pingcap/tidb/pkg/util/intest.doPanic({0x0, 0x0}, {0x0, 0x0, 0x0})
	pkg/util/intest/assert_common.go:58 +0x79
github.com/pingcap/tidb/pkg/util/intest.doAssert(0x0, {0x0, 0x0, 0x0})
	pkg/util/intest/assert_common.go:30 +0x6e
github.com/pingcap/tidb/pkg/util/intest.Assert(0x0, {0x0, 0x0, 0x0})
	pkg/util/intest/assert.go:25 +0x9e
github.com/pingcap/tidb/pkg/util/ranger.getPotentialEqOrInColOffset(0xc00867aee0, {0xa6e1c60, 0xc00867aaf0}, {0xc00b624108, 0x1, 0x1})
	pkg/util/ranger/detacher.go:141 +0x87d
github.com/pingcap/tidb/pkg/util/ranger.ExtractEqAndInCondition(0xc00867aee0, {0xc006bb3580, 0x2, 0x2}, {0xc00b624108, 0x1, 0x1}, {0xc008702038, 0x1, 0x1})
	pkg/util/ranger/detacher.go:735 +0x22a
github.com/pingcap/tidb/pkg/util/ranger.(*rangeDetacher).detachCNFCondAndBuildRangeForIndex(0xc006cd86d0, {0xc006bb3580, 0x2, 0x2}, {0xc00b624118, 0x1, 0x1}, 0x1)
	pkg/util/ranger/detacher.go:401 +0x1ab
github.com/pingcap/tidb/pkg/util/ranger.(*rangeDetacher).detachCondAndBuildRangeForCols(0xc006cd86d0)
	pkg/util/ranger/detacher.go:1097 +0x45b
github.com/pingcap/tidb/pkg/util/ranger.DetachCondAndBuildRangeForIndex(0xc00867aee0, {0xc006bb3580, 0x2, 0x2}, {0xc00b624108, 0x1, 0x1}, {0xc008702038, 0x1, 0x1}, ...)
	pkg/util/ranger/detacher.go:1032 +0x185
github.com/pingcap/tidb/pkg/planner/core.detachCondAndBuildRangeForPath({0xa6a0058, 0xc005f94af0}, 0xc007f60d80, {0xc006bb3580, 0x2, 0x2}, 0xc0091a1920)
	pkg/planner/core/stats.go:397 +0x2a5
github.com/pingcap/tidb/pkg/planner/core.fillIndexPath(0xc00655b508, 0xc007f60d80, {0xc006bb3580, 0x2, 0x2})
	pkg/planner/core/stats.go:205 +0xa25
github.com/pingcap/tidb/pkg/planner/core.deriveStats4DataSource({0xa6de968, 0xc00655b508})
	pkg/planner/core/stats.go:141 +0xaa5
github.com/pingcap/tidb/pkg/planner/core/operator/logicalop.(*DataSource).DeriveStats(0xc00655b508, {0x22c16ac?, 0x22c72f5?, 0x1?}, 0x8?, {0x8?, 0xc006cd8d40?, 0x224ffeb?}, {0xfc31300, 0x0, ...})
	pkg/planner/core/operator/logicalop/logical_datasource.go:308 +0x52
github.com/pingcap/tidb/pkg/planner/core/operator/logicalop.(*BaseLogicalPlan).RecursiveDeriveStats(0xc00655b528, {0x0, 0x0, 0x0})
	pkg/planner/core/operator/logicalop/base_logical_plan.go:235 +0x56f
github.com/pingcap/tidb/pkg/planner/core/operator/logicalop.(*BaseLogicalPlan).RecursiveDeriveStats(0xc006738620, {0x0, 0x0, 0x0})
	pkg/planner/core/operator/logicalop/base_logical_plan.go:226 +0x2b8
github.com/pingcap/tidb/pkg/planner/core/operator/logicalop.(*BaseLogicalPlan).RecursiveDeriveStats(0xc006bace20, {0x0, 0x0, 0x0})
	pkg/planner/core/operator/logicalop/base_logical_plan.go:226 +0x2b8
github.com/pingcap/tidb/pkg/planner/core.physicalOptimize({0xa6de688, 0xc006bace00}, 0xc0087cffa8)
	pkg/planner/core/optimizer.go:1133 +0x1f9
github.com/pingcap/tidb/pkg/planner/core.VolcanoOptimize({0xa642e10, 0xc0098a8e10}, {0xa6a0058, 0xc005f94af0}, 0x61002, {0xa6de688, 0xc006bace00})
	pkg/planner/core/optimizer.go:362 +0x245
github.com/pingcap/tidb/pkg/planner/core.doOptimize({0xa642e10, 0xc0098a8e10}, {0xa6a0058, 0xc005f94af0}, 0x61002, {0xa6de688, 0xc006bace00})
	pkg/planner/core/optimizer.go:286 +0x1b5
github.com/pingcap/tidb/pkg/planner/core.DoOptimize({0xa642e10, 0xc0098a8e10}, {0xa6a0058, 0xc005f94af0}, 0x61002, {0xa6de688, 0xc006bace00})
	pkg/planner/core/optimizer.go:411 +0x1f6
github.com/pingcap/tidb/pkg/planner/core.(*PlanBuilder).buildUpdate(0xc0071d90e0, {0xa642e10, 0xc0098a8e10}, 0xc00bd98210)
	pkg/planner/core/logical_plan_builder.go:5604 +0x1a5b
github.com/pingcap/tidb/pkg/planner/core.(*PlanBuilder).Build(0xc0071d90e0, {0xa642e10, 0xc0098a8e10}, 0xc006cda668)
	pkg/planner/core/planbuilder.go:549 +0xa25
github.com/pingcap/tidb/pkg/planner.buildLogicalPlan({0xa642e10, 0xc0098a8e10}, {0xa6a0058, 0xc005f94af0}, 0xc006cda668, 0xc0071d90e0)
	pkg/planner/optimize.go:571 +0x365
github.com/pingcap/tidb/pkg/planner.optimize({0xa642e10, 0xc0098a8e10}, {0xa6a0058, 0xc005f94af0}, 0xc006cda668, {0xa6a3470, 0xc00919e840})
	pkg/planner/optimize.go:490 +0x7da
github.com/pingcap/tidb/pkg/planner.optimizeNoCache({0xa642e10, 0xc0098a8e10}, {0xa6e6b28, 0xc001b61b88}, 0xc006d5bc50, {0xa6a3470, 0xc00919e840})
	pkg/planner/optimize.go:357 +0x1cd0
github.com/pingcap/tidb/pkg/planner.Optimize({0xa642e10, 0xc0098a8e10}, {0xa6e6b28, 0xc001b61b88}, 0xc006d5bc50, {0xa6a3470, 0xc00919e840})
	pkg/planner/optimize.go:206 +0xc47
github.com/pingcap/tidb/pkg/executor.(*Compiler).Compile(0xc006cdb000, {0xa642e10, 0xc0098a8e10}, {0xa661d88, 0xc00bd98210})
	pkg/executor/compiler.go:102 +0x951
github.com/pingcap/tidb/pkg/session.(*session).ExecuteStmt(0xc001b61b88, {0xa642e10, 0xc0098a8e10}, {0xa661d88, 0xc00bd98210})
	pkg/session/session.go:2146 +0x12e5
github.com/pingcap/tidb/pkg/session.(*session).ExecuteInternal(0xc001b61b88, {0xa642e10, 0xc0098a8e10}, {0x9b2e4ad, 0x51}, {0xc006c025c0, 0x4, 0x4})
	pkg/session/session.go:1571 +0x3f2
github.com/pingcap/tidb/pkg/session.mustExecute({0xa6fbdd0, 0xc001b61b88}, {0x9b2e4ad, 0x51}, {0xc006c025c0, 0x4, 0x4})
	pkg/session/bootstrap.go:1321 +0x143
github.com/pingcap/tidb/pkg/session.writeStmtSummaryVars({0xa6fbdd0, 0xc001b61b88})
	pkg/session/upgrade.go:992 +0x19f
github.com/pingcap/tidb/pkg/session.doDMLWorks({0xa6fbdd0, 0xc001b61b88})
	pkg/session/bootstrap.go:1294 +0xc71
github.com/pingcap/tidb/pkg/session.bootstrap({0xa6fbdd0, 0xc001b61b88})
	pkg/session/bootstrap.go:840 +0x50f
github.com/pingcap/tidb/pkg/session.runInBootstrapSession({0xa694a88, 0xc0021af860}, 0x0)
	pkg/session/session.go:3792 +0x7c8
github.com/pingcap/tidb/pkg/session.bootstrapSessionImpl({0xa642c50, 0xfc31300}, {0xa694a88, 0xc0021af860}, 0x9be9220)
	pkg/session/session.go:3529 +0x634
github.com/pingcap/tidb/pkg/session.BootstrapSession({0xa694a88, 0xc0021af860})
	pkg/session/session.go:3465 +0x5a
github.com/pingcap/tidb/pkg/store/gcworker.bootstrap({0xa690a50, 0xc0012dad00}, {0xa694a88, 0xc0021af860}, 0xa7a358200)
	pkg/store/gcworker/gc_worker_test.go:1690 +0x70
github.com/pingcap/tidb/pkg/store/gcworker.createGCWorkerSuiteWithStoreType(0xc0012dad00, 0x1, 0xa7a358200)
	pkg/store/gcworker/gc_worker_test.go:177 +0x4da
github.com/pingcap/tidb/pkg/store/gcworker.createGCWorkerSuite(0xc0012dad00)
	pkg/store/gcworker/gc_worker_test.go:149 +0x47
github.com/pingcap/tidb/pkg/store/gcworker.TestGetOracleTime(0xc0012dad00)
	pkg/store/gcworker/gc_worker_test.go:303 +0x4a
testing.tRunner(0xc0012dad00, 0x9be84c0)
	GOROOT/src/testing/testing.go:1690 +0x227
created by testing.(*T).Run in goroutine 1
	GOROOT/src/testing/testing.go:1743 +0x826

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