Class QueryPlan

java.lang.Object
org.cojen.tupl.diag.QueryPlan
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
QueryPlan.Aggregator, QueryPlan.Exists, QueryPlan.Filter, QueryPlan.Grouper, QueryPlan.Identity, QueryPlan.Mapper, QueryPlan.NaturalJoin, QueryPlan.NestedLoopsJoin.Level, QueryPlan.Set, QueryPlan.Sort, QueryPlan.Table
public abstract sealed class QueryPlan extends Object implements Serializable permits QueryPlan.Table, QueryPlan.Identity, QueryPlan.Filter, QueryPlan.Mapper, QueryPlan.Aggregator, QueryPlan.Grouper, QueryPlan.Exists, QueryPlan.Sort, QueryPlan.NaturalJoin, QueryPlan.Set, QueryPlan.NestedLoopsJoin.Level
A query plan tree structure.
See Also:

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static final class 
    QueryPlan.Aggregator
    Query plan node which applies aggregation.
    static class 
    QueryPlan.Concat
    Query plan node which represents a concatenated set of plans.
    static final class 
    QueryPlan.DisjointUnion
    Query plan node which represents a union set of plans, where each source plan only produces rows which aren't produced by the other sources.
    static final class 
    QueryPlan.Empty
    Query plan node which represents an empty set.
    static final class 
    QueryPlan.Exists
    Query plan node which only checks for the existance of at least one row.
    static final class 
    QueryPlan.Filter
    Query plan node which filters out rows.
    static final class 
    QueryPlan.FullScan
    Query plan node which scans all rows of a table.
    static final class 
    QueryPlan.Grouper
    Query plan node which applies grouping.
    static final class 
    QueryPlan.GroupSort
    Query plan node which sorts rows within a group.
    static final class 
    QueryPlan.Identity
    Query plan node which represents a single row with no columns.
    static final class 
    QueryPlan.LoadOne
    Query plan node which loads at most one row from a table.
    static final class 
    QueryPlan.Mapper
    Query plan node which applies custom row mapping and filtering.
    static final class 
    QueryPlan.MergeConcat
    Query plan node which represents a concatenated set of plans which have an explicit ordering, and source rows are compared to each other to maintain the ordering.
    static final class 
    QueryPlan.MergeUnion
    Query plan node which represents a union set of plans which have an common ordering, and rows are compared to each other for eliminating duplicates.
    static class 
    QueryPlan.NaturalJoin
    Query plan node which joins a target to a source based on a common set of columns.
    static final class 
    QueryPlan.NestedLoopsJoin
    Query plan node which represents a nested loop join.
    static final class 
    QueryPlan.PrimaryJoin
    Query plan node which joins index rows to primary rows.
    static final class 
    QueryPlan.RangeScan
    Query plan node which scans a range of rows from a table.
    static final class 
    QueryPlan.RangeUnion
    Query plan node which represents a union set of plans, where each source plan is limited to a range, and all sources produce rows in the same order.
    static class 
    QueryPlan.Scan
    Query plan node which scans a table.
    static class 
    QueryPlan.Set
    Query plan node which represents a set of plans.
    static class 
    QueryPlan.Sort
    Query plan node which sorts the rows.
    static class 
    QueryPlan.Table
    Query plan node which accesses rows from a table.
    static class 
    QueryPlan.Union
    Query plan node which represents a union set of plans.

  • Method Summary

    Modifier and Type
    Method
    Description
    final void
    appendTo(Appendable a)
     
    final void
    appendTo(StringBuilder b)
     
    final void
    printTo(PrintStream out)
     
    final String
    toString()
     

    Methods inherited from class java.lang.Object

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