Package org.apache.drill.exec.planner.logical

Class PreProcessLogicalRel

java.lang.Object
org.apache.calcite.rel.RelShuttleImpl
org.apache.drill.exec.planner.logical.PreProcessLogicalRel
All Implemented Interfaces:
org.apache.calcite.rel.RelShuttle
public class PreProcessLogicalRel extends org.apache.calcite.rel.RelShuttleImpl
This class rewrites all the project expression that contain convert_to/ convert_from to actual implementations. Eg: convert_from(EXPR, 'JSON') is rewritten as convert_fromjson(EXPR) With the actual method name we can find out if the function has a complex output type and we will fire/ ignore certain rules (merge project rule) based on this fact.

  • Field Summary

    Fields inherited from class org.apache.calcite.rel.RelShuttleImpl

    stack

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    convertException()
     
    static PreProcessLogicalRel
    createVisitor(org.apache.calcite.rel.type.RelDataTypeFactory factory, DrillOperatorTable table, org.apache.calcite.rex.RexBuilder rexBuilder)
     
    org.apache.calcite.rel.RelNode
    visit(org.apache.calcite.rel.logical.LogicalFilter filter)
     
    org.apache.calcite.rel.RelNode
    visit(org.apache.calcite.rel.logical.LogicalIntersect intersect)
     
    org.apache.calcite.rel.RelNode
    visit(org.apache.calcite.rel.logical.LogicalJoin join)
     
    org.apache.calcite.rel.RelNode
    visit(org.apache.calcite.rel.logical.LogicalMinus minus)
     
    org.apache.calcite.rel.RelNode
    visit(org.apache.calcite.rel.logical.LogicalProject project)
     
    org.apache.calcite.rel.RelNode
    visit(org.apache.calcite.rel.logical.LogicalUnion union)
     

    Methods inherited from class org.apache.calcite.rel.RelShuttleImpl

    visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visitChild, visitChildren

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • createVisitor

      public static PreProcessLogicalRel createVisitor(org.apache.calcite.rel.type.RelDataTypeFactory factory, DrillOperatorTable table, org.apache.calcite.rex.RexBuilder rexBuilder)

    • visit

      public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.logical.LogicalProject project)
      Specified by:
      visit in interface org.apache.calcite.rel.RelShuttle
      Overrides:
      visit in class org.apache.calcite.rel.RelShuttleImpl

    • visit

      public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.logical.LogicalFilter filter)
      Specified by:
      visit in interface org.apache.calcite.rel.RelShuttle
      Overrides:
      visit in class org.apache.calcite.rel.RelShuttleImpl

    • visit

      public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.logical.LogicalJoin join)
      Specified by:
      visit in interface org.apache.calcite.rel.RelShuttle
      Overrides:
      visit in class org.apache.calcite.rel.RelShuttleImpl

    • visit

      public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.logical.LogicalUnion union)
      Specified by:
      visit in interface org.apache.calcite.rel.RelShuttle
      Overrides:
      visit in class org.apache.calcite.rel.RelShuttleImpl

    • visit

      public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.logical.LogicalIntersect intersect)
      Specified by:
      visit in interface org.apache.calcite.rel.RelShuttle
      Overrides:
      visit in class org.apache.calcite.rel.RelShuttleImpl

    • visit

      public org.apache.calcite.rel.RelNode visit(org.apache.calcite.rel.logical.LogicalMinus minus)
      Specified by:
      visit in interface org.apache.calcite.rel.RelShuttle
      Overrides:
      visit in class org.apache.calcite.rel.RelShuttleImpl

    • convertException

      public void convertException() throws SqlUnsupportedException
      Throws:
      SqlUnsupportedException