com.mckoi.database
Class QueryPlan.NonCorrelatedAnyAllNode
java.lang.Object
com.mckoi.database.QueryPlan.BranchQueryPlanNode
com.mckoi.database.QueryPlan.NonCorrelatedAnyAllNode
- All Implemented Interfaces:
- QueryPlanNode, java.io.Serializable, java.lang.Cloneable
- Enclosing class:
- QueryPlan
public static class QueryPlan.NonCorrelatedAnyAllNode
- extends QueryPlan.BranchQueryPlanNode
A branch node for a non-correlated ANY or ALL sub-query evaluation. This
node requires a set of columns from the left branch and an operator.
The right branch represents the non-correlated sub-query.
NOTE: The cost of a SubQuery is higher if the right child result is
greater than the left child result. The plan should be arranged so
smaller results are on the left.
- See Also:
- Serialized Form
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
QueryPlan.NonCorrelatedAnyAllNode
public QueryPlan.NonCorrelatedAnyAllNode(QueryPlanNode left,
QueryPlanNode right,
Variable[] left_vars,
Operator subquery_op)
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
clone
public java.lang.Object clone()
throws java.lang.CloneNotSupportedException
- Description copied from class:
QueryPlan.BranchQueryPlanNode
- Deep clone.
- Specified by:
clone
in interface QueryPlanNode
- Overrides:
clone
in class QueryPlan.BranchQueryPlanNode
- Throws:
java.lang.CloneNotSupportedException
titleString
public java.lang.String titleString()
- Overrides:
titleString
in class QueryPlan.BranchQueryPlanNode