Package com.mckoi.database

Class QueryPlan.RangeSelectNode

java.lang.Object
com.mckoi.database.QueryPlan.SingleQueryPlanNode
com.mckoi.database.QueryPlan.RangeSelectNode
All Implemented Interfaces:
QueryPlanNode, Serializable, Cloneable
Enclosing class:
QueryPlan
public static class QueryPlan.RangeSelectNode extends QueryPlan.SingleQueryPlanNode
The node for performing a simple indexed query on a single column of the child node. Finds the set from the child node that matches the range.

The given Expression object must conform to a number of rules. It may reference only one column in the child node. It must consist of only simple mathemetical and logical operators (invalid input: '<', >, =, invalid input: '<'>, >=, invalid input: '<'=, AND, OR). The left side of each mathematical operator must be a variable, and the right side must be a constant (parameter subsitution or correlated value). For example; (col > 10 AND col invalid input: '<' 100) OR col > 1000 OR col == 10

Breaking any of these rules will mean the range select can not happen.

See Also: