[NSE-574]implement columnar limit

native-sql-engine/core/src/main/scala/com/intel/oap/GazellePluginConfig.scala

@@ -118,6 +118,14 @@ class GazellePluginConfig(conf: SQLConf) extends Logging {
   val enableColumnarArrowUDF: Boolean =
     conf.getConfString("spark.oap.sql.columnar.arrowudf", "true").toBoolean && enableCpu
 
+  // enable or disable columnar columnar arrow udf
+  val enableColumnarLocalLimit: Boolean =
+    conf.getConfString("spark.oap.sql.columnar.locallimit", "true").toBoolean && enableCpu
+
+  // enable or disable columnar columnar arrow udf
+  val enableColumnarGlobalLimit: Boolean =
+    conf.getConfString("spark.oap.sql.columnar.globallimit", "true").toBoolean && enableCpu
+
   // enable or disable columnar wholestagecodegen
   val enableColumnarWholeStageCodegen: Boolean =
     conf.getConfString("spark.oap.sql.columnar.wholestagecodegen", "true").toBoolean && enableCpu

native-sql-engine/core/src/main/scala/com/intel/oap/execution/ColumnarBasicPhysicalOperators.scala

@@ -23,6 +23,7 @@ import com.intel.oap.vectorized._
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen._
+import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.internal.Logging
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.execution._
@@ -308,3 +309,144 @@ case class ColumnarUnionExec(children: Seq[SparkPlan]) extends SparkPlan {
     throw new UnsupportedOperationException(s"This operator doesn't support doExecute().")
   }
 }
+
+//TODO(): consolidate locallimit and globallimit
+case class ColumnarLocalLimitExec(limit: Int, child: SparkPlan) extends LimitExec {
+  // updating nullability to make all the children consistent
+
+  buildCheck()
+
+  def buildCheck(): Unit = {
+    for (child <- children) {
+      for (schema <- child.schema) {
+        try {
+          ConverterUtils.checkIfTypeSupported(schema.dataType)
+        } catch {
+          case e: UnsupportedOperationException =>
+            throw new UnsupportedOperationException(
+              s"${schema.dataType} is not supported in ColumnarLocalLimitExec")
+        }
+      }
+    }
+  }
+
+
+  override def outputOrdering: Seq[SortOrder] = child.outputOrdering
+
+  override def outputPartitioning: Partitioning = child.outputPartitioning
+
+  override def supportsColumnar = true
+  override def output: Seq[Attribute] = child.output
+  protected override def doExecuteColumnar(): RDD[ColumnarBatch] = {
+    child.executeColumnar().mapPartitions { iter =>
+    val hasInput = iter.hasNext
+      val res = if (hasInput) {
+        new Iterator[ColumnarBatch] {
+          var rowCount = 0
+          override def hasNext: Boolean = {
+            val hasNext = iter.hasNext
+            hasNext && (rowCount <= limit)
+          }
+
+          override def next(): ColumnarBatch = {
+
+            if (!hasNext) {
+              throw new NoSuchElementException("End of ColumnarBatch iterator")
+            }
+
+            if (rowCount < limit) {
+              val delta = iter.next()
+              rowCount += delta.numRows
+              if (rowCount > limit) {
+                val newSize = rowCount - limit
+                delta.setNumRows(newSize)
+              }
+              delta
+            } else {
+              throw new NoSuchElementException("End of ColumnarBatch iterator")
+            }
+          }
+        }
+      } else {
+        Iterator.empty
+      }
+      new CloseableColumnBatchIterator(res)
+    }
+  }
+
+  protected override def doExecute()
+      : org.apache.spark.rdd.RDD[org.apache.spark.sql.catalyst.InternalRow] = {
+    throw new UnsupportedOperationException(s"This operator doesn't support doExecute().")
+  }
+
+}
+
+case class ColumnarGlobalLimitExec(limit: Int, child: SparkPlan) extends LimitExec {
+  // updating nullability to make all the children consistent
+
+  buildCheck()
+
+  def buildCheck(): Unit = {
+    for (child <- children) {
+      for (schema <- child.schema) {
+        try {
+          ConverterUtils.checkIfTypeSupported(schema.dataType)
+        } catch {
+          case e: UnsupportedOperationException =>
+            throw new UnsupportedOperationException(
+              s"${schema.dataType} is not supported in ColumnarGlobalLimitExec")
+        }
+      }
+    }
+  }
+
+
+  override def outputOrdering: Seq[SortOrder] = child.outputOrdering
+
+  override def outputPartitioning: Partitioning = child.outputPartitioning
+  override def requiredChildDistribution: List[Distribution] = AllTuples :: Nil
+
+  override def supportsColumnar = true
+  override def output: Seq[Attribute] = child.output
+  protected override def doExecuteColumnar(): RDD[ColumnarBatch] = {
+    child.executeColumnar().mapPartitions { iter =>
+      val hasInput = iter.hasNext
+      val res = if (hasInput) {
+        new Iterator[ColumnarBatch] {
+          var rowCount = 0
+          override def hasNext: Boolean = {
+            val hasNext = iter.hasNext
+            hasNext && (rowCount <= limit)
+          }
+
+          override def next(): ColumnarBatch = {
+
+            if (!hasNext) {
+              throw new NoSuchElementException("End of ColumnarBatch iterator")
+            }
+
+            if (rowCount < limit) {
+              val delta = iter.next()
+              rowCount += delta.numRows
+              if (rowCount > limit) {
+                val newSize = rowCount - limit
+                delta.setNumRows(newSize)
+              }
+              delta
+            } else {
+              throw new NoSuchElementException("End of ColumnarBatch iterator")
+            }
+          }
+        }
+      } else {
+        Iterator.empty
+      }
+      new CloseableColumnBatchIterator(res)
+    }
+  }
+
+  protected override def doExecute()
+      : org.apache.spark.rdd.RDD[org.apache.spark.sql.catalyst.InternalRow] = {
+    throw new UnsupportedOperationException(s"This operator doesn't support doExecute().")
+  }
+}

native-sql-engine/core/src/main/scala/com/intel/oap/extension/ColumnarOverrides.scala

@@ -107,6 +107,14 @@ case class ColumnarPreOverrides() extends Rule[SparkPlan] {
       val children = plan.children.map(replaceWithColumnarPlan)
       logDebug(s"Columnar Processing for ${plan.getClass} is currently supported.")
       ColumnarUnionExec(children)
+    case plan: LocalLimitExec =>
+      val child = replaceWithColumnarPlan(plan.child)
+      logDebug(s"Columnar Processing for ${plan.getClass} is currently supported.")
+      ColumnarLocalLimitExec(plan.limit, child)
+    case plan: GlobalLimitExec =>
+      val child = replaceWithColumnarPlan(plan.child)
+      logDebug(s"Columnar Processing for ${plan.getClass} is currently supported.")
+      ColumnarGlobalLimitExec(plan.limit, child)
     case plan: ExpandExec =>
       val child = replaceWithColumnarPlan(plan.child)
       logDebug(s"Columnar Processing for ${plan.getClass} is currently supported.")

native-sql-engine/core/src/main/scala/com/intel/oap/extension/columnar/ColumnarGuardRule.scala

@@ -61,6 +61,8 @@ case class ColumnarGuardRule() extends Rule[SparkPlan] {
   val enableColumnarBroadcastExchange = columnarConf.enableColumnarBroadcastExchange
   val enableColumnarBroadcastJoin = columnarConf.enableColumnarBroadcastJoin
   val enableColumnarArrowUDF = columnarConf.enableColumnarArrowUDF
+  val enableColumnarLocalLimit = columnarConf.enableColumnarLocalLimit
+  val enableColumnarGlobalLimit = columnarConf.enableColumnarGlobalLimit
 
   private def tryConvertToColumnar(plan: SparkPlan): Boolean = {
     try {
@@ -101,6 +103,12 @@ case class ColumnarGuardRule() extends Rule[SparkPlan] {
         case plan: UnionExec =>
           if (!enableColumnarUnion) return false
           new ColumnarUnionExec(plan.children)
+        case plan: LocalLimitExec =>
+          if (!enableColumnarLocalLimit) return false
+          new ColumnarLocalLimitExec(plan.limit, plan.child)
+        case plan: GlobalLimitExec =>
+          if (!enableColumnarGlobalLimit) return false
+          new ColumnarGlobalLimitExec(plan.limit, plan.child)
         case plan: ExpandExec =>
           if (!enableColumnarExpand) return false
           new ColumnarExpandExec(plan.projections, plan.output, plan.child)