Module org.cojen.tupl

Package org.cojen.tupl.diag

Class QueryPlan

java.lang.Object

org.cojen.tupl.diag.QueryPlan

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

QueryPlan.Filter, QueryPlan.NaturalJoin, QueryPlan.Set, QueryPlan.Sort, QueryPlan.Table

public abstract sealed class QueryPlan
extends Object
implements Serializable
permits QueryPlan.Table, QueryPlan.Filter, QueryPlan.Sort, QueryPlan.NaturalJoin, QueryPlan.Set

A query plan tree structure.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
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.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.GroupSort	Query plan node which sorts rows within a group.
static final class	QueryPlan.LoadOne	Query plan node which loads at most one row from a table.
static class	QueryPlan.NaturalJoin	Query plan node which joins two sources based on a common set of columns.
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
void	appendTo(Appendable a)
void	appendTo(StringBuilder b)
void	printTo(PrintStream out)
final String	toString()

Methods inherited from class java.lang.Object

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

Method Details

toString

public final String toString()

Overrides:

toString in class Object

printTo

public void printTo(PrintStream out)

appendTo

public void appendTo(StringBuilder b)

appendTo

public void appendTo(Appendable a)
              throws IOException

Throws:

IOException