Package com.mckoi.database

Class QueryPlan.FetchTableNode

  • All Implemented Interfaces:
    QueryPlanNode, java.io.Serializable, java.lang.Cloneable
    Enclosing class:
    QueryPlan
    public static class QueryPlan.FetchTableNode
extends java.lang.Object
implements QueryPlanNode
    The node for fetching a table from the current transaction. This is a tree node and has no children.
    See Also:
    Serialized Form

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object clone()
      Deep clones this query plan.
      void debugString​(int level, java.lang.StringBuffer buf)
      Writes a textural representation of the node to the StringBuffer at the given indent level.
      java.util.ArrayList discoverCorrelatedVariables​(int level, java.util.ArrayList list)
      Discovers all the correlated variables in the plan (and plan children) that reference a particular layer.
      java.util.ArrayList discoverTableNames​(java.util.ArrayList list)
      Adds the table name to the list if it's not already in there.
      Table evaluate​(QueryContext context)
      Evaluates the node and returns the result as a Table.
      java.lang.String titleString()  

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

    • Method Detail

      • discoverTableNames

        public java.util.ArrayList discoverTableNames​(java.util.ArrayList list)
        Adds the table name to the list if it's not already in there.
        Specified by:
        discoverTableNames in interface QueryPlanNode

      • evaluate

        public Table evaluate​(QueryContext context)
        Description copied from interface: QueryPlanNode
        Evaluates the node and returns the result as a Table. The VariableResolver resolves any outer variables
        Specified by:
        evaluate in interface QueryPlanNode

      • discoverCorrelatedVariables

        public java.util.ArrayList discoverCorrelatedVariables​(int level,
                                                       java.util.ArrayList list)
        Description copied from interface: QueryPlanNode
        Discovers all the correlated variables in the plan (and plan children) that reference a particular layer. For example, if we wanted to find all the CorrelatedVariable objects that reference the current layer, we would typically call 'discoverCorrelatedVariables(0, new ArrayList())'
        Specified by:
        discoverCorrelatedVariables in interface QueryPlanNode

      • clone

        public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
        Description copied from interface: QueryPlanNode
        Deep clones this query plan.
        Specified by:
        clone in interface QueryPlanNode
        Overrides:
        clone in class java.lang.Object
        Throws:
        java.lang.CloneNotSupportedException

      • titleString

        public java.lang.String titleString()

      • debugString

        public void debugString​(int level,
                        java.lang.StringBuffer buf)
        Description copied from interface: QueryPlanNode
        Writes a textural representation of the node to the StringBuffer at the given indent level.
        Specified by:
        debugString in interface QueryPlanNode