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.

Method Summary

Modifier and Type	Method and Description
static boolean	containsColumn(List<org.h2.table.IndexColumn> cols, org.h2.table.IndexColumn col)
static boolean	containsKeyColumn(GridH2RowDescriptor desc, List<org.h2.table.IndexColumn> cols) Check whether columns list contains key or key alias column.
static Object	convert(Object val, GridH2RowDescriptor desc, int type) Convert value to column's expected type by means of H2.
static GridH2IndexBase	createSpatialIndex(GridH2Table tbl, String idxName, org.h2.table.IndexColumn[] cols) Create spatial index.
static boolean	equals(org.h2.table.IndexColumn c1, org.h2.table.IndexColumn c2)
static String	indexCreateSql(String fullTblName, GridH2IndexBase 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 org.h2.engine.Session	session(Connection c)
static void	setupConnection(Connection conn, boolean distributedJoins, boolean enforceJoinOrder)
static List<org.h2.table.IndexColumn>	treeIndexColumns(GridH2RowDescriptor desc, List<org.h2.table.IndexColumn> cols, org.h2.table.IndexColumn keyCol, org.h2.table.IndexColumn affCol)
static String	withQuotes(String str) Add quotes around the name.
static QueryCursorImpl<List<?>>	zeroCursor()

Methods inherited from class java.lang.Object

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

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.

containsColumn

public static boolean containsColumn(List<org.h2.table.IndexColumn> cols,
                                     org.h2.table.IndexColumn col)

Parameters:

cols - Columns list.

col - Column to find.

Returns:

true If found.

containsKeyColumn

public static boolean containsKeyColumn(GridH2RowDescriptor desc,
                                        List<org.h2.table.IndexColumn> cols)

Check whether columns list contains key or key alias column.

Parameters:

desc - Row descriptor.

cols - Columns list.

Returns:

Result.

indexCreateSql

public static String indexCreateSql(String fullTblName,
                                    GridH2IndexBase 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.

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.

treeIndexColumns

public static List<org.h2.table.IndexColumn> treeIndexColumns(GridH2RowDescriptor desc,
                                                              List<org.h2.table.IndexColumn> cols,
                                                              org.h2.table.IndexColumn keyCol,
                                                              org.h2.table.IndexColumn affCol)

Parameters:

desc - Row descriptor.

cols - Columns list.

keyCol - Primary key column.

affCol - Affinity key column.

Returns:

The same list back.

createSpatialIndex

public static GridH2IndexBase createSpatialIndex(GridH2Table tbl,
                                                 String idxName,
                                                 org.h2.table.IndexColumn[] cols)

Create spatial index.

Parameters:

tbl - Table.

idxName - Index name.

cols - Columns.

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.

session

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

Parameters:

c - Connection.

Returns:

Session.

setupConnection

public static void setupConnection(Connection conn,
                                   boolean distributedJoins,
                                   boolean enforceJoinOrder)

Parameters:

conn - Connection to use.

distributedJoins - If distributed joins are enabled.

enforceJoinOrder - Enforce join order of tables.

convert

public static Object convert(Object val,
                             GridH2RowDescriptor desc,
                             int type)
                      throws IgniteCheckedException

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

Parameters:

val - Source value.

desc - Row descriptor.

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.