org.apache.ignite.internal.processors.query.h2.dml

Class UpdatePlanBuilder

java.lang.Object

org.apache.ignite.internal.processors.query.h2.dml.UpdatePlanBuilder

public final class UpdatePlanBuilder
extends Object

Logic for building update plans performed by DmlStatementsProcessor.

Method Summary

Modifier and Type	Method and Description
static boolean	isSkipReducerOnUpdateQuery(SqlFieldsQuery qry) Checks whether query flags are compatible with server side update.
static UpdatePlan	planForBulkLoad(SqlBulkLoadCommand cmd, GridH2Table tbl) Prepare update plan for COPY command (AKA bulk load).
static UpdatePlan	planForStatement(org.h2.command.Prepared prepared, boolean loc, IgniteH2Indexing idx, Connection conn, SqlFieldsQuery fieldsQry, Integer errKeysPos) Generate SELECT statements to retrieve data for modifications from and find fast UPDATE or DELETE args, if available.

Methods inherited from class java.lang.Object

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

Method Detail

planForStatement

public static UpdatePlan planForStatement(org.h2.command.Prepared prepared,
                                          boolean loc,
                                          IgniteH2Indexing idx,
                                          @Nullable
                                          Connection conn,
                                          @Nullable
                                          SqlFieldsQuery fieldsQry,
                                          @Nullable
                                          Integer errKeysPos)
                                   throws IgniteCheckedException

Generate SELECT statements to retrieve data for modifications from and find fast UPDATE or DELETE args, if available.

Parameters:

prepared - H2's Prepared.

loc - Local query flag.

idx - Indexing.

conn - Connection.

fieldsQry - Original query.

Returns:

Update plan.

Throws:

IgniteCheckedException

planForBulkLoad

public static UpdatePlan planForBulkLoad(SqlBulkLoadCommand cmd,
                                         GridH2Table tbl)
                                  throws IgniteCheckedException

Prepare update plan for COPY command (AKA bulk load).

Parameters:

cmd - Bulk load command

Returns:

The update plan for this command.

Throws:

IgniteCheckedException - if failed.

isSkipReducerOnUpdateQuery

public static boolean isSkipReducerOnUpdateQuery(SqlFieldsQuery qry)

Checks whether query flags are compatible with server side update.

Parameters:

qry - Query.

Returns:

true if update can be distributed.