Package org.apache.ignite.internal.processors.query.h2.opt

Class QueryContext

java.lang.Object

org.apache.ignite.internal.processors.query.h2.opt.QueryContext

public class QueryContext
extends Object

Thread local SQL query context which is intended to be accessible from everywhere.

Constructor Summary

Constructors

Constructor	Description
QueryContext(int segment, @Nullable IndexingQueryFilter filter, @Nullable DistributedJoinContext distributedJoinCtx, @Nullable PartitionReservation reservations, boolean loc)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	clearContext(boolean nodeStop)
@Nullable DistributedJoinContext	distributedJoinContext()
IndexingQueryFilter	filter()
boolean	local()
static QueryContext	parseContext(@Nullable IndexingQueryFilter filter, boolean local)
int	segment()
static QueryContext	threadLocal()	Hack with thread local context is used only for H2 methods that is called without Session object.
static void	threadLocal(QueryContext qctx)	Hack with thread local context is used only for H2 methods that is called without Session object.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryContext

public QueryContext(int segment,
                    @Nullable
                    @Nullable IndexingQueryFilter filter,
                    @Nullable
                    @Nullable DistributedJoinContext distributedJoinCtx,
                    @Nullable
                    @Nullable PartitionReservation reservations,
                    boolean loc)

Constructor.

Parameters:

segment - Index segment ID.

filter - Filter.

distributedJoinCtx - Distributed join context.

loc - True for local queries, false for distributed ones.

Method Detail

parseContext

public static QueryContext parseContext(@Nullable
                                        @Nullable IndexingQueryFilter filter,
                                        boolean local)

Parameters:

filter - Filter.

local - Local query flag.

Returns:

Context for parsing.

distributedJoinContext

@Nullable
public @Nullable DistributedJoinContext distributedJoinContext()

Returns:

Distributed join context.

segment

public int segment()

Returns:

Index segment ID.

clearContext

public void clearContext(boolean nodeStop)

Parameters:

nodeStop - Node is stopping.

filter

public IndexingQueryFilter filter()

Returns:

Filter.

local

public boolean local()

Returns:

True for local queries, false for distributed ones.

toString

public String toString()

Overrides:

toString in class Object

threadLocal

public static void threadLocal(QueryContext qctx)

Hack with thread local context is used only for H2 methods that is called without Session object. e.g. GridH2Table.getRowCountApproximation (used only on optimization phase, after parse).

Parameters:

qctx - Context.

threadLocal

public static QueryContext threadLocal()

Hack with thread local context is used only for H2 methods that is called without Session object. e.g. GridH2Table.getRowCountApproximation (used only on optimization phase, after parse).

Returns:

Thread local context.