Fail to run simple expression for constant column in offline

Now we can not run `cut2("100")` in offline and get the following error.

```
Should not handle non-const column for const project node
com._4paradigm.hybridse.sdk.UnsupportedHybridSeException: Should not handle non-const column for const project node
at com._4paradigm.openmldb.batch.nodes.ConstProjectPlan$.$anonfun$gen$3(ConstProjectPlan.scala:59)
at com._4paradigm.openmldb.batch.nodes.ConstProjectPlan$.$anonfun$gen$3$adapted(ConstProjectPlan.scala:44)
at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:237)
at scala.collection.immutable.Range.foreach(Range.scala:158)
at scala.collection.TraversableLike.map(TraversableLike.scala:237)
at scala.collection.TraversableLike.map$(TraversableLike.scala:230)
at scala.collection.AbstractTraversable.map(Traversable.scala:108)
at com._4paradigm.openmldb.batch.nodes.ConstProjectPlan$.gen(ConstProjectPlan.scala:44)
at com._4paradigm.openmldb.batch.SparkPlanner.visitNode(SparkPlanner.scala:236)
at com._4paradigm.openmldb.batch.SparkPlanner.getSparkOutput(SparkPlanner.scala:225)
at com._4paradigm.openmldb.batch.SparkPlanner.$anonfun$plan$1(SparkPlanner.scala:106)
at com._4paradigm.openmldb.batch.SparkPlanner.withSQLEngine(SparkPlanner.scala:390)
at com._4paradigm.openmldb.batch.SparkPlanner.plan(SparkPlanner.scala:76)
at com._4paradigm.openmldb.batch.api.OpenmldbSession.openmldbSql(OpenmldbSession.scala:168)
at com._4paradigm.openmldb.batch.api.OpenmldbSession.sql(OpenmldbSession.scala:179)
at com._4paradigm.openmldb.batch.end2end.TestLoadExternalUdf.$anonfun$new$1(TestLoadExternalUdf.scala:30)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
at org.scalatest.Transformer.apply(Transformer.scala:22)
at org.scalatest.Transformer.apply(Transformer.scala:20)
at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:186)
at org.scalatest.TestSuite.withFixture(TestSuite.scala:196)
at org.scalatest.TestSuite.withFixture$(TestSuite.scala:195)
at org.scalatest.FunSuite.withFixture(FunSuite.scala:1560)
at org.scalatest.FunSuiteLike.invokeWithFixture$1(FunSuiteLike.scala:184)
at org.scalatest.FunSuiteLike.$anonfun$runTest$1(FunSuiteLike.scala:196)
at org.scalatest.SuperEngine.runTestImpl(Engine.scala:289)
at org.scalatest.FunSuiteLike.runTest(FunSuiteLike.scala:196)
at org.scalatest.FunSuiteLike.runTest$(FunSuiteLike.scala:178)
at com._4paradigm.openmldb.batch.SparkTestSuite.org$scalatest$BeforeAndAfter$$super$runTest(SparkTestSuite.scala:23)
at org.scalatest.BeforeAndAfter.runTest(BeforeAndAfter.scala:203)
at org.scalatest.BeforeAndAfter.runTest$(BeforeAndAfter.scala:192)
at com._4paradigm.openmldb.batch.SparkTestSuite.runTest(SparkTestSuite.scala:23)
at org.scalatest.FunSuiteLike.$anonfun$runTests$1(FunSuiteLike.scala:229)
at org.scalatest.SuperEngine.$anonfun$runTestsInBranch$1(Engine.scala:396)
at scala.collection.immutable.List.foreach(List.scala:392)
at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:384)
at org.scalatest.SuperEngine.runTestsInBranch(Engine.scala:379)
at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:461)
at org.scalatest.FunSuiteLike.runTests(FunSuiteLike.scala:229)
at org.scalatest.FunSuiteLike.runTests$(FunSuiteLike.scala:228)
at org.scalatest.FunSuite.runTests(FunSuite.scala:1560)
at org.scalatest.Suite.run(Suite.scala:1147)
at org.scalatest.Suite.run$(Suite.scala:1129)
at org.scalatest.FunSuite.org$scalatest$FunSuiteLike$$super$run(FunSuite.scala:1560)
at org.scalatest.FunSuiteLike.$anonfun$run$1(FunSuiteLike.scala:233)
at org.scalatest.SuperEngine.runImpl(Engine.scala:521)
at org.scalatest.FunSuiteLike.run(FunSuiteLike.scala:233)
at org.scalatest.FunSuiteLike.run$(FunSuiteLike.scala:232)
at com._4paradigm.openmldb.batch.SparkTestSuite.org$scalatest$BeforeAndAfter$$super$run(SparkTestSuite.scala:23)
at org.scalatest.BeforeAndAfter.run(BeforeAndAfter.scala:258)
at org.scalatest.BeforeAndAfter.run$(BeforeAndAfter.scala:256)
at com._4paradigm.openmldb.batch.SparkTestSuite.run(SparkTestSuite.scala:23)
at org.scalatest.tools.SuiteRunner.run(SuiteRunner.scala:45)
at org.scalatest.tools.Runner$.$anonfun$doRunRunRunDaDoRunRun$13(Runner.scala:1340)
at org.scalatest.tools.Runner$.$anonfun$doRunRunRunDaDoRunRun$13$adapted(Runner.scala:1334)
at scala.collection.immutable.List.foreach(List.scala:392)
at org.scalatest.tools.Runner$.doRunRunRunDaDoRunRun(Runner.scala:1334)
at org.scalatest.tools.Runner$.$anonfun$runOptionallyWithPassFailReporter$24(Runner.scala:1031)
at org.scalatest.tools.Runner$.$anonfun$runOptionallyWithPassFailReporter$24$adapted(Runner.scala:1010)
at org.scalatest.tools.Runner$.withClassLoaderAndDispatchReporter(Runner.scala:1500)
at org.scalatest.tools.Runner$.runOptionallyWithPassFailReporter(Runner.scala:1010)
at org.scalatest.tools.Runner$.run(Runner.scala:850)
at org.scalatest.tools.Runner.run(Runner.scala)
at org.jetbrains.plugins.scala.testingSupport.scalaTest.ScalaTestRunner.runScalaTest2or3(ScalaTestRunner.java:38)
at org.jetbrains.plugins.scala.testingSupport.scalaTest.ScalaTestRunner.main(ScalaTestRunner.java:25)
```