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

Class GridSqlQueryParser

java.lang.Object

org.apache.ignite.internal.processors.query.h2.sql.GridSqlQueryParser

public class GridSqlQueryParser
extends Object

H2 Query parser.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GridSqlQueryParser.Getter<T,R> Field getter.
static class	GridSqlQueryParser.PreparedWithRemaining

Field Summary

Fields

Modifier and Type	Field and Description
static String	ORG_H2_COMMAND_COMMAND_LIST
static String	PARAM_DATA_REGION Data region name.
static String	PARAM_WRAP_VALUE
static GridSqlQueryParser.Getter<org.gridgain.internal.h2.table.TableView,org.gridgain.internal.h2.command.dml.Query>	VIEW_QUERY

Constructor Summary

Constructors

Constructor and Description
GridSqlQueryParser(boolean useOptimizedSubqry, IgniteLogger log)

Method Summary

Modifier and Type	Method and Description
List<Integer>	cacheIds()
static boolean	checkMultipleStatements(PreparedStatement stmt)
static void	checkTypeSupported(int type, String errMsg)
static @NotNull GridH2Table	dmlTable(@NotNull org.gridgain.internal.h2.command.Prepared stmt)
GridCacheContext	getFirstPartitionedCache() Get first (i.e. random, as we need any one) partitioned cache from parsed query to determine expected query parallelism.
static boolean	isDml(org.gridgain.internal.h2.command.Prepared stmt) Check whether statement is DML statement.
static boolean	isExplainUpdate(org.gridgain.internal.h2.command.Prepared statement) Determines if specified prepared statement is an EXPLAIN of update operation: UPDATE, DELETE, etc.
static boolean	isForUpdateQuery(org.gridgain.internal.h2.command.Prepared p)
boolean	isLocalQuery() Check if query may be run locally on all caches mentioned in the query.
static boolean	isStreamableInsertStatement(org.gridgain.internal.h2.command.Prepared prep) Check if passed statement is insert statement eligible for streaming.
Map<Object,Object>	objectsMap()
GridSqlStatement	parse(org.gridgain.internal.h2.command.Prepared stmt)
static GridSqlQuery	parseQuery(org.gridgain.internal.h2.command.Prepared prepared, boolean useOptimizedSubqry, IgniteLogger log) Parse query.
static org.gridgain.internal.h2.command.Prepared	prepared(PreparedStatement stmt)
static GridSqlQueryParser.PreparedWithRemaining	preparedWithRemaining(PreparedStatement stmt)
static org.gridgain.internal.h2.command.dml.Query	query(org.gridgain.internal.h2.command.Prepared qry)
List<GridH2Table>	tablesForDml() Extract all tables participating in DML statement.

Methods inherited from class java.lang.Object

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

Field Detail

VIEW_QUERY

public static final GridSqlQueryParser.Getter<org.gridgain.internal.h2.table.TableView,org.gridgain.internal.h2.command.dml.Query> VIEW_QUERY

ORG_H2_COMMAND_COMMAND_LIST

public static final String ORG_H2_COMMAND_COMMAND_LIST

See Also:

Constant Field Values

PARAM_WRAP_VALUE

public static final String PARAM_WRAP_VALUE

See Also:

Constant Field Values

PARAM_DATA_REGION

public static final String PARAM_DATA_REGION

Data region name.

See Also:

Constant Field Values

Constructor Detail

GridSqlQueryParser

public GridSqlQueryParser(boolean useOptimizedSubqry,
                          IgniteLogger log)

Parameters:

useOptimizedSubqry - If we have to find correct order for table filters in FROM clause. Relies on uniqueness of table filter aliases.

log - Logger.

Method Detail

checkMultipleStatements

public static boolean checkMultipleStatements(PreparedStatement stmt)

Parameters:

stmt - Prepared statement to check.

Returns:

true in case of multiple statements.

prepared

public static org.gridgain.internal.h2.command.Prepared prepared(PreparedStatement stmt)

Parameters:

stmt - Prepared statement.

Returns:

Parsed select.

preparedWithRemaining

public static GridSqlQueryParser.PreparedWithRemaining preparedWithRemaining(PreparedStatement stmt)

Parameters:

stmt - Prepared statement.

Returns:

Parsed select.

isForUpdateQuery

public static boolean isForUpdateQuery(org.gridgain.internal.h2.command.Prepared p)

Parameters:

p - Prepared.

Returns:

Whether p is an SELECT FOR UPDATE query.

query

public static org.gridgain.internal.h2.command.dml.Query query(org.gridgain.internal.h2.command.Prepared qry)

Parameters:

qry - Prepared.

Returns:

Query.

isDml

public static boolean isDml(org.gridgain.internal.h2.command.Prepared stmt)

Check whether statement is DML statement.

Parameters:

stmt - Statement.

Returns:

True if this is DML.

dmlTable

@NotNull
public static @NotNull GridH2Table dmlTable(@NotNull
                                                     @NotNull org.gridgain.internal.h2.command.Prepared stmt)

Parameters:

stmt - Prepared.

Returns:

Target table.

isLocalQuery

public boolean isLocalQuery()

Check if query may be run locally on all caches mentioned in the query.

Returns:

true if query may be run locally on all caches mentioned in the query, i.e. there's no need to run distributed query.

getFirstPartitionedCache

public GridCacheContext getFirstPartitionedCache()

Get first (i.e. random, as we need any one) partitioned cache from parsed query to determine expected query parallelism.

Returns:

Context for the first of partitioned caches mentioned in the query, or null if it does not involve partitioned caches.

cacheIds

public List<Integer> cacheIds()

Returns:

All known cache IDs.

tablesForDml

public List<GridH2Table> tablesForDml()
                               throws IgniteSQLException

Extract all tables participating in DML statement.

Returns:

List of tables participate at query.

Throws:

IgniteSQLException - in case query contains virtual tables.

parseQuery

public static GridSqlQuery parseQuery(org.gridgain.internal.h2.command.Prepared prepared,
                                      boolean useOptimizedSubqry,
                                      IgniteLogger log)

Parse query.

Parameters:

prepared - Prepared statement.

useOptimizedSubqry - Whether to user optimized subquery.

Returns:

Parsed query.

parse

public final GridSqlStatement parse(org.gridgain.internal.h2.command.Prepared stmt)

Parameters:

stmt - Prepared statement.

Returns:

Parsed AST.

objectsMap

public Map<Object,Object> objectsMap()

Returns:

H2 to Grid objects map.

isStreamableInsertStatement

public static boolean isStreamableInsertStatement(org.gridgain.internal.h2.command.Prepared prep)

Check if passed statement is insert statement eligible for streaming.

Parameters:

prep - Prepared statement.

Returns:

True if streamable insert.

isExplainUpdate

public static boolean isExplainUpdate(org.gridgain.internal.h2.command.Prepared statement)

Determines if specified prepared statement is an EXPLAIN of update operation: UPDATE, DELETE, etc. (e.g. not a SELECT query).

Parameters:

statement - statement to probe.

Returns:

True if statement is EXPLAIN UPDATE, EXPLAIN DELETE or etc.; false otherwise.

checkTypeSupported

public static void checkTypeSupported(int type,
                                      String errMsg)