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

Class H2Utils

java.lang.Object

org.apache.ignite.internal.processors.query.h2.H2Utils

public class H2Utils
extends Object

H2 utility methods.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	H2Utils.Getter<T,R>	Field getter.
static class	H2Utils.Setter<T,R>	Field getter.
static class	H2Utils.ValueRuntimeSimpleObject<T>

Field Summary

Fields

Modifier and Type	Field	Description
static org.h2.table.IndexColumn[]	EMPTY_COLUMNS
static String	QCTX_VARIABLE_NAME	Query context H2 variable name.
static List<GridQueryFieldMetadata>	UPDATE_RESULT_META	Dummy metadata for update result.

Method Summary

Modifier and Type	Method	Description
static void	bindParameters(PreparedStatement stmt, @Nullable Collection<Object> params)	Binds parameters to prepared statement.
static <Z> void	bubbleUp(Z[] arr, int off, Comparator<Z> cmp)
static boolean	checkAndStartNotStartedCache(GridKernalContext ctx, GridCacheContextInfo<?,?> cacheInfo)	Check that given cache is not started and start it for such case.
static void	checkQuery(IgniteH2Indexing idx, List<Integer> cacheIds, Collection<QueryTable> tbls)	Check if query is valid.
static boolean	checkSpatialIndexEnabled()	Check if spatial indexes are enabled.
static List<Integer>	collectCacheIds(IgniteH2Indexing idx, @Nullable Integer mainCacheId, Collection<QueryTable> tbls)	Collect cache identifiers from two-step query.
static QueryContext	context(H2PooledConnection conn)
static QueryContext	context(org.h2.engine.Session ses)
static Object	convert(Object val, CacheObjectValueContext coCtx, int type)	Convert value to column's expected type by means of H2.
static GridH2IndexBase	createSpatialIndex(GridH2Table tbl, IndexDescriptor idxDesc, List<org.h2.table.IndexColumn> cols)	Create spatial index.
static boolean	equals(org.h2.table.IndexColumn c1, org.h2.table.IndexColumn c2)
static String	generateFieldsQueryString(String qry, String tableAlias, H2TableDescriptor tbl)	Generate SqlFieldsQuery string from SqlQuery.
static <T,R> H2Utils.Getter<T,R>	getter(Class<? extends T> cls, String fldName)
static String	indexColumnsSql(org.h2.table.IndexColumn[] idxCols)	Generate String represenation of given indexed columns.
static String	indexCreateSql(String fullTblName, org.h2.index.Index h2Idx, boolean ifNotExists)	Generate CREATE INDEX SQL statement for given params.
static String	indexDropSql(String schemaName, String idxName, boolean ifExists)	Generate CREATE INDEX SQL statement for given params.
static List<GridQueryFieldMetadata>	meta(ResultSetMetaData rsMeta)
static List<JdbcParameterMeta>	parametersMeta(ParameterMetaData h2ParamsMeta)	Converts h2 parameters metadata to Ignite one.
static String	queryEngine()
static void	resetSession(H2PooledConnection conn)	Clean up session for further reuse.
static GridH2RetryException	retryException(String msg)	Create retry exception for distributed join.
static org.h2.engine.Session	session(Connection c)
static org.h2.engine.Session	session(H2PooledConnection c)
static <T,R> H2Utils.Setter<T,R>	setter(Class<? extends T> cls, String fldName)
static void	setupConnection(H2PooledConnection conn, QueryContext qctx, boolean distributedJoins, boolean enforceJoinOrder)
static void	setupConnection(H2PooledConnection conn, QueryContext qctx, boolean distributedJoins, boolean enforceJoinOrder, boolean lazy)
static String	tableCreateSql(H2TableDescriptor tbl)	Prepare SQL statement for CREATE TABLE command.
static GridH2RowMessage	toRowMessage(org.h2.result.Row row)
static String	withQuotes(String str)	Add quotes around the name.
static org.h2.value.Value	wrap(CacheObjectValueContext coCtx, Object obj, int type)	Wraps object to respective Value.
static QueryCursorImpl<List<?>>	zeroCursor()

Methods inherited from class java.lang.Object

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

Field Detail

QCTX_VARIABLE_NAME

public static final String QCTX_VARIABLE_NAME

Query context H2 variable name.

See Also:

Constant Field Values

EMPTY_COLUMNS

public static final org.h2.table.IndexColumn[] EMPTY_COLUMNS

UPDATE_RESULT_META

public static final List<GridQueryFieldMetadata> UPDATE_RESULT_META

Dummy metadata for update result.

Method Detail

equals

public static boolean equals(org.h2.table.IndexColumn c1,
                             org.h2.table.IndexColumn c2)

Parameters:

c1 - First column.

c2 - Second column.

Returns:

true If they are the same.

tableCreateSql

public static String tableCreateSql(H2TableDescriptor tbl)

Prepare SQL statement for CREATE TABLE command.

Parameters:

tbl - Table descriptor.

Returns:

SQL.

indexCreateSql

public static String indexCreateSql(String fullTblName,
                                    org.h2.index.Index h2Idx,
                                    boolean ifNotExists)

Generate CREATE INDEX SQL statement for given params.

Parameters:

fullTblName - Fully qualified table name.

h2Idx - H2 index.

ifNotExists - Quietly skip index creation if it exists.

Returns:

Statement string.

indexColumnsSql

public static String indexColumnsSql(org.h2.table.IndexColumn[] idxCols)

Generate String represenation of given indexed columns.

Parameters:

idxCols - Indexed columns.

Returns:

String represenation of given indexed columns.

indexDropSql

public static String indexDropSql(String schemaName,
                                  String idxName,
                                  boolean ifExists)

Generate CREATE INDEX SQL statement for given params.

Parameters:

schemaName - Quoted schema name.

idxName - Index name.

ifExists - Quietly skip index drop if it exists.

Returns:

Statement string.

createSpatialIndex

public static GridH2IndexBase createSpatialIndex(GridH2Table tbl,
                                                 IndexDescriptor idxDesc,
                                                 List<org.h2.table.IndexColumn> cols)

Create spatial index.

Parameters:

tbl - Table.

idxDesc - Index descriptor.

cols - Columns.

checkSpatialIndexEnabled

public static boolean checkSpatialIndexEnabled()

Check if spatial indexes are enabled.

withQuotes

public static String withQuotes(String str)

Add quotes around the name.

Parameters:

str - String.

Returns:

String with quotes.

meta

public static List<GridQueryFieldMetadata> meta(ResultSetMetaData rsMeta)
                                         throws SQLException

Parameters:

rsMeta - Metadata.

Returns:

List of fields metadata.

Throws:

SQLException - If failed.

parametersMeta

public static List<JdbcParameterMeta> parametersMeta(ParameterMetaData h2ParamsMeta)
                                              throws IgniteCheckedException

Converts h2 parameters metadata to Ignite one.

Parameters:

h2ParamsMeta - parameters metadata returned by h2.

Returns:

Descriptions of the parameters.

Throws:

IgniteCheckedException

session

public static org.h2.engine.Session session(H2PooledConnection c)

Parameters:

c - Connection.

Returns:

Session.

session

public static org.h2.engine.Session session(Connection c)

Parameters:

c - Connection.

Returns:

Session.

setupConnection

public static void setupConnection(H2PooledConnection conn,
                                   QueryContext qctx,
                                   boolean distributedJoins,
                                   boolean enforceJoinOrder)

Parameters:

conn - Connection to use.

qctx - Query context.

distributedJoins - If distributed joins are enabled.

enforceJoinOrder - Enforce join order of tables.

setupConnection

public static void setupConnection(H2PooledConnection conn,
                                   QueryContext qctx,
                                   boolean distributedJoins,
                                   boolean enforceJoinOrder,
                                   boolean lazy)

Parameters:

conn - Connection to use.

qctx - Query context.

distributedJoins - If distributed joins are enabled.

enforceJoinOrder - Enforce join order of tables.

lazy - Lazy query execution mode.

resetSession

public static void resetSession(H2PooledConnection conn)

Clean up session for further reuse.

Parameters:

conn - Connection to use.

context

public static QueryContext context(H2PooledConnection conn)

Parameters:

conn - Connection to use.

Returns:

Query context.

context

public static QueryContext context(org.h2.engine.Session ses)

Parameters:

ses - Session.

Returns:

Query context.

convert

public static Object convert(Object val,
                             CacheObjectValueContext coCtx,
                             int type)
                      throws IgniteCheckedException

Convert value to column's expected type by means of H2.

Parameters:

val - Source value.

coCtx - Cache object context.

type - Expected column type to convert to.

Returns:

Converted object.

Throws:

IgniteCheckedException - if failed.

zeroCursor

public static QueryCursorImpl<List<?>> zeroCursor()

Returns:

Single-column, single-row cursor with 0 as number of updated records.

checkAndStartNotStartedCache

public static boolean checkAndStartNotStartedCache(GridKernalContext ctx,
                                                   GridCacheContextInfo<?,?> cacheInfo)

Check that given cache is not started and start it for such case.

Parameters:

cacheInfo - Cache context info.

Returns:

true in case not started and has been started.

wrap

public static org.h2.value.Value wrap(CacheObjectValueContext coCtx,
                                      Object obj,
                                      int type)
                               throws IgniteCheckedException

Wraps object to respective Value.

Parameters:

obj - Object.

type - Value type.

Returns:

Value.

Throws:

IgniteCheckedException - If failed.

generateFieldsQueryString

public static String generateFieldsQueryString(String qry,
                                               String tableAlias,
                                               H2TableDescriptor tbl)
                                        throws IgniteCheckedException

Generate SqlFieldsQuery string from SqlQuery.

Parameters:

qry - Query string.

tableAlias - table alias.

tbl - Table to use.

Returns:

Prepared statement.

Throws:

IgniteCheckedException - In case of error.

toRowMessage

public static GridH2RowMessage toRowMessage(org.h2.result.Row row)

Parameters:

row - Row.

Returns:

Row message.

retryException

public static GridH2RetryException retryException(String msg)

Create retry exception for distributed join.

Parameters:

msg - Message.

Returns:

Exception.

bindParameters

public static void bindParameters(PreparedStatement stmt,
                                  @Nullable
                                  @Nullable Collection<Object> params)
                           throws IgniteCheckedException

Binds parameters to prepared statement.

Parameters:

stmt - Prepared statement.

params - Parameters collection.

Throws:

IgniteCheckedException - If failed.

bubbleUp

public static <Z> void bubbleUp(Z[] arr,
                                int off,
                                Comparator<Z> cmp)

Parameters:

arr - Array.

off - Offset.

cmp - Comparator.

collectCacheIds

public static List<Integer> collectCacheIds(IgniteH2Indexing idx,
                                            @Nullable
                                            @Nullable Integer mainCacheId,
                                            Collection<QueryTable> tbls)

Collect cache identifiers from two-step query.

Parameters:

mainCacheId - Id of main cache.

Returns:

Result.

checkQuery

public static void checkQuery(IgniteH2Indexing idx,
                              List<Integer> cacheIds,
                              Collection<QueryTable> tbls)

Check if query is valid.

Parameters:

idx - Indexing.

cacheIds - Cache IDs.

tbls - Tables.

queryEngine

public static String queryEngine()

Returns:

Query engine name.

getter

public static <T,R> H2Utils.Getter<T,R> getter(Class<? extends T> cls,
                                                           String fldName)

Parameters:

cls - Class.

fldName - Fld name.

setter

public static <T,R> H2Utils.Setter<T,R> setter(Class<? extends T> cls,
                                                           String fldName)

Parameters:

cls - Class.

fldName - Fld name.