org.datanucleus.store.rdbms.adapter
Class H2Adapter

java.lang.Object
  org.datanucleus.store.rdbms.adapter.DatabaseAdapter
      org.datanucleus.store.rdbms.adapter.H2Adapter

All Implemented Interfaces:

org.datanucleus.store.mapped.DatastoreAdapter, RDBMSAdapter

public class H2Adapter
extends DatabaseAdapter

Provides methods for adapting SQL language elements to the H2 Database Engine.

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.adapter.DatabaseAdapter

catalogSeparator, datastoreMajorVersion, datastoreMinorVersion, datastoreProductName, datastoreProductVersion, datastoreRevisionVersion, driverMajorVersion, driverMinorVersion, driverName, driverVersion, identifierQuoteString, LOCALISER, LOCALISER_BASE, maxColumnNameLength, maxConstraintNameLength, maxIndexNameLength, maxTableNameLength, properties, reservedKeywords, supportedOptions

Fields inherited from interface org.datanucleus.store.rdbms.adapter.RDBMSAdapter

ACCESS_PARENTQUERY_IN_SUBQUERY_JOINED, ALTER_TABLE_DROP_CONSTRAINT_SYNTAX, ALTER_TABLE_DROP_FOREIGN_KEY_CONSTRAINT, ANSI_CROSSJOIN_SYNTAX, ANSI_JOIN_SYNTAX, AUTO_INCREMENT_COLUMN_TYPE_SPECIFICATION, AUTO_INCREMENT_KEYS_NULL_SPECIFICATION, AUTO_INCREMENT_PK_IN_CREATE_TABLE_COLUMN_DEF, BLOB_SET_USING_SETSTRING, CHAR_COLUMNS_PADDED_WITH_SPACES, CHECK_IN_CREATE_STATEMENTS, CHECK_IN_END_CREATE_STATEMENTS, CLOB_SET_USING_SETSTRING, CREATE_INDEXES_BEFORE_FOREIGN_KEYS, CROSSJOIN_ASINNER11_SYNTAX, DATETIME_STORES_MILLISECS, DEFAULT_BEFORE_NULL_IN_COLUMN_OPTIONS, DEFAULT_KEYWORD_IN_COLUMN_OPTIONS, DEFAULT_KEYWORD_WITH_NOT_NULL_IN_COLUMN_OPTIONS, DEFERRED_CONSTRAINTS, DISTINCT_WITH_SELECT_FOR_UPDATE, EXISTS_SYNTAX, FK_DELETE_ACTION_CASCADE, FK_DELETE_ACTION_DEFAULT, FK_DELETE_ACTION_NULL, FK_DELETE_ACTION_RESTRICT, FK_IN_END_CREATE_STATEMENTS, FK_UPDATE_ACTION_CASCADE, FK_UPDATE_ACTION_DEFAULT, FK_UPDATE_ACTION_NULL, FK_UPDATE_ACTION_RESTRICT, GET_GENERATED_KEYS_STATEMENT, INCLUDE_ORDERBY_COLS_IN_SELECT, LOCK_OPTION_PLACED_AFTER_FROM, LOCK_OPTION_PLACED_WITHIN_JOIN, LOCK_WITH_SELECT_FOR_UPDATE, NULL_EQUALS_EMPTY_STRING, NULLS_IN_CANDIDATE_KEYS, NULLS_KEYWORD_IN_COLUMN_OPTIONS, ORDERBY_USING_SELECT_COLUMN_INDEX, PERSIST_OF_UNASSIGNED_CHAR, PRIMARYKEY_IN_CREATE_STATEMENTS, STATEMENT_BATCHING, STORED_PROCEDURES, TX_ISOLATION_NONE, TX_ISOLATION_READ_COMMITTED, TX_ISOLATION_READ_UNCOMMITTED, TX_ISOLATION_REPEATABLE_READ, TX_ISOLATION_SERIALIZABLE, UNION_SYNTAX, UNIQUE_IN_END_CREATE_STATEMENTS, UPDATE_MULTITABLE, USE_UNION_ALL, VIEWS

Fields inherited from interface org.datanucleus.store.mapped.DatastoreAdapter

ANALYSIS_METHODS, BIT_IS_REALLY_BOOLEAN, BOOLEAN_COMPARISON, CATALOGS_IN_TABLE_DEFINITIONS, ESCAPE_EXPRESSION_IN_LIKE_PREDICATE, IDENTIFIERS_LOWERCASE, IDENTIFIERS_LOWERCASE_QUOTED, IDENTIFIERS_MIXEDCASE, IDENTIFIERS_MIXEDCASE_QUOTED, IDENTIFIERS_MIXEDCASE_QUOTED_SENSITIVE, IDENTIFIERS_MIXEDCASE_SENSITIVE, IDENTIFIERS_UPPERCASE, IDENTIFIERS_UPPERCASE_QUOTED, IDENTITY_COLUMNS, PROJECTION_IN_TABLE_REFERENCE_JOINS, SCHEMAS_IN_TABLE_DEFINITIONS, SEQUENCES

Constructor Summary

H2Adapter(DatabaseMetaData metadata)
Constructs a H2 adapter based on the given JDBC metadata.

Method Summary

String	getAddColumnStatement(org.datanucleus.store.mapped.DatastoreContainerObject table, Column col) Accessor for the SQL statement to add a column to a table.
String	getAddPrimaryKeyStatement(PrimaryKey pk, org.datanucleus.store.mapped.IdentifierFactory factory) HSQL 1.7.0 does not support ALTER TABLE to define a primary key
String	getAutoIncrementKeyword() Accessor for the auto-increment keyword for generating DDLs (CREATE TABLEs...).
String	getAutoIncrementStmt(Table table, String columnName) Accessor for the auto-increment sql statement for this datastore.
int	getDatastoreIdentifierMaxLength(org.datanucleus.store.mapped.IdentifierType identifierType) Method to return the maximum length of a datastore identifier of the specified type.
String	getDropTableStatement(org.datanucleus.store.mapped.DatastoreContainerObject table) Returns the appropriate SQL to drop the given table.
String	getInsertStatementForNoColumns(Table table) Method to retutn the INSERT statement to use when inserting into a table that has no columns specified.
String	getRangeByLimitEndOfStatementClause(long offset, long count) Method to return the SQL to append to the WHERE clause of a SELECT statement to handle restriction of ranges using the LIMIT keyword.
String	getSchemaName(Connection conn) Accessor for the Schema Name for this datastore.
String	getSequenceCreateStmt(String sequence_name, Integer min, Integer max, Integer start, Integer increment, Integer cache_size) Accessor for the sequence statement to create the sequence.
String	getSequenceNextStmt(String sequence_name) Accessor for the statement for getting the next id from the sequence for this datastore.
String	getVendorID() Accessor for the vendor ID for this adapter.
boolean	isStatementCancel(SQLException sqle) return whether this exception represents a cancelled statement.
boolean	isValidPrimaryKeyType(int datatype) Accessor for whether the specified type is allow to be part of a PK.
SQLTypeInfo	newSQLTypeInfo(ResultSet rs) Create a new SQL type info from the current row of the passed ResultSet.

Methods inherited from class org.datanucleus.store.rdbms.adapter.DatabaseAdapter

addSQLTypeForJDBCType, getAdapterTime, getAddCandidateKeyStatement, getAddForeignKeyStatement, getCatalogName, getCatalogSeparator, getCheckConstraintForValues, getColumns, getContinuationString, getCreateIndexStatement, getCreateTableStatement, getDatastoreDateStatement, getDatastoreDriverName, getDatastoreDriverVersion, getDatastoreProductName, getDatastoreProductVersion, getDeleteTableStatement, getDriverMajorVersion, getDriverMinorVersion, getDropViewStatement, getEscapeCharacter, getEscapePatternExpression, getExistingIndexes, getIdentifierQuoteString, getMappingManager, getMaxForeignKeys, getMaxIndexes, getMiliseconds, getNewUUIDFunction, getNumericConversionFunction, getOperatorConcat, getOrderString, getPatternExpressionAnyCharacter, getPatternExpressionZeroMoreCharacters, getRangeByRowNumberColumn, getRangeByRowNumberColumn2, getRequiredTransactionIsolationLevel, getSelectForUpdateText, getSelectNewUUIDStmt, getSelectWithLockOption, getSQLTypeInfoForJdbcType, getSupportedOptions, getSurrogateForEmptyStrings, getTime, getTransactionIsolationForSchemaCreation, getUnlimitedLengthPrecisionValue, getValueForProperty, initialiseDatastore, initialiseTypes, isIdentityFieldDataType, isKeyword, isReservedKeyword, isStatementTimeout, iteratorReservedWords, newFKInfo, newRDBMSColumnInfo, parseKeywordList, removeUnsupportedMappings, setProperties, supportsOption, supportsQueryFetchSize, supportsTransactionIsolation, toString, validToSelectMappingInStatement

Methods inherited from class java.lang.Object

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

Constructor Detail

H2Adapter

public H2Adapter(DatabaseMetaData metadata)

Constructs a H2 adapter based on the given JDBC metadata.

Parameters:

metadata - the database metadata.

Method Detail

getVendorID

public String getVendorID()

Accessor for the vendor ID for this adapter.

Specified by:

getVendorID in interface org.datanucleus.store.mapped.DatastoreAdapter

Overrides:

getVendorID in class DatabaseAdapter

Returns:

The vendor ID

newSQLTypeInfo

public SQLTypeInfo newSQLTypeInfo(ResultSet rs)

Description copied from interface: RDBMSAdapter

Create a new SQL type info from the current row of the passed ResultSet. Allows an adapter to override particular types where the JDBC driver is known to be buggy.

Specified by:

newSQLTypeInfo in interface RDBMSAdapter

Overrides:

newSQLTypeInfo in class DatabaseAdapter

Parameters:

rs - ResultSet

Returns:

The SQL type info

getDatastoreIdentifierMaxLength

public int getDatastoreIdentifierMaxLength(org.datanucleus.store.mapped.IdentifierType identifierType)

Method to return the maximum length of a datastore identifier of the specified type. If no limit exists then returns -1

Specified by:

getDatastoreIdentifierMaxLength in interface org.datanucleus.store.mapped.DatastoreAdapter

Overrides:

getDatastoreIdentifierMaxLength in class DatabaseAdapter

Parameters:

identifierType - Type of identifier (see IdentifierFactory.TABLE, etc)

Returns:

The max permitted length of this type of identifier

getAddColumnStatement

public String getAddColumnStatement(org.datanucleus.store.mapped.DatastoreContainerObject table,
                                    Column col)

Accessor for the SQL statement to add a column to a table.

Specified by:

getAddColumnStatement in interface RDBMSAdapter

Overrides:

getAddColumnStatement in class DatabaseAdapter

Parameters:

table - The table

col - The column

Returns:

The SQL necessary to add the column

getRangeByLimitEndOfStatementClause

public String getRangeByLimitEndOfStatementClause(long offset,
                                                  long count)

Method to return the SQL to append to the WHERE clause of a SELECT statement to handle restriction of ranges using the LIMIT keyword.

Specified by:

getRangeByLimitEndOfStatementClause in interface RDBMSAdapter

Overrides:

getRangeByLimitEndOfStatementClause in class DatabaseAdapter

Parameters:

offset - The offset to return from

count - The number of items to return

Returns:

The SQL to append to allow for ranges using LIMIT.

getSchemaName

public String getSchemaName(Connection conn)
                     throws SQLException

Accessor for the Schema Name for this datastore.

Specified by:

getSchemaName in interface RDBMSAdapter

Overrides:

getSchemaName in class DatabaseAdapter

Parameters:

conn - Connection to the datastore

Returns:

The schema name

Throws:

SQLException - Thrown if error occurs in determining the schema name.

getAddPrimaryKeyStatement

public String getAddPrimaryKeyStatement(PrimaryKey pk,
                                        org.datanucleus.store.mapped.IdentifierFactory factory)

HSQL 1.7.0 does not support ALTER TABLE to define a primary key

Specified by:

getAddPrimaryKeyStatement in interface RDBMSAdapter

Overrides:

getAddPrimaryKeyStatement in class DatabaseAdapter

Parameters:

pk - An object describing the primary key.

factory - Identifier factory

Returns:

The PK statement

getDropTableStatement

public String getDropTableStatement(org.datanucleus.store.mapped.DatastoreContainerObject table)

Returns the appropriate SQL to drop the given table. It should return something like:

 DROP TABLE FOO
 

Specified by:

getDropTableStatement in interface RDBMSAdapter

Overrides:

getDropTableStatement in class DatabaseAdapter

Parameters:

table - The table to drop.

Returns:

The text of the SQL statement.

getAutoIncrementStmt

public String getAutoIncrementStmt(Table table,
                                   String columnName)

Accessor for the auto-increment sql statement for this datastore.

Specified by:

getAutoIncrementStmt in interface RDBMSAdapter

Overrides:

getAutoIncrementStmt in class DatabaseAdapter

Parameters:

table - Name of the table that the autoincrement is for

columnName - Name of the column that the autoincrement is for

Returns:

The statement for getting the latest auto-increment key

getAutoIncrementKeyword

public String getAutoIncrementKeyword()

Accessor for the auto-increment keyword for generating DDLs (CREATE TABLEs...).

Specified by:

getAutoIncrementKeyword in interface RDBMSAdapter

Overrides:

getAutoIncrementKeyword in class DatabaseAdapter

Returns:

The keyword for a column using auto-increment

getInsertStatementForNoColumns

public String getInsertStatementForNoColumns(Table table)

Method to retutn the INSERT statement to use when inserting into a table that has no columns specified. This is the case when we have a single column in the table and that column is autoincrement/identity (and so is assigned automatically in the datastore).

Specified by:

getInsertStatementForNoColumns in interface RDBMSAdapter

Overrides:

getInsertStatementForNoColumns in class DatabaseAdapter

Parameters:

table - The table

Returns:

The INSERT statement

isValidPrimaryKeyType

public boolean isValidPrimaryKeyType(int datatype)

Accessor for whether the specified type is allow to be part of a PK.

Specified by:

isValidPrimaryKeyType in interface RDBMSAdapter

Overrides:

isValidPrimaryKeyType in class DatabaseAdapter

Parameters:

datatype - The JDBC type

Returns:

Whether it is permitted in the PK

getSequenceCreateStmt

public String getSequenceCreateStmt(String sequence_name,
                                    Integer min,
                                    Integer max,
                                    Integer start,
                                    Integer increment,
                                    Integer cache_size)

Accessor for the sequence statement to create the sequence.

Specified by:

getSequenceCreateStmt in interface RDBMSAdapter

Overrides:

getSequenceCreateStmt in class DatabaseAdapter

Parameters:

sequence_name - Name of the sequence

min - Minimum value for the sequence

max - Maximum value for the sequence

start - Start value for the sequence

increment - Increment value for the sequence

cache_size - Cache size for the sequence

Returns:

The statement for getting the next id from the sequence

getSequenceNextStmt

public String getSequenceNextStmt(String sequence_name)

Accessor for the statement for getting the next id from the sequence for this datastore.

Specified by:

getSequenceNextStmt in interface RDBMSAdapter

Overrides:

getSequenceNextStmt in class DatabaseAdapter

Parameters:

sequence_name - Name of the sequence

Returns:

The statement for getting the next id for the sequence

isStatementCancel

public boolean isStatementCancel(SQLException sqle)

return whether this exception represents a cancelled statement.

Specified by:

isStatementCancel in interface RDBMSAdapter

Overrides:

isStatementCancel in class DatabaseAdapter

Parameters:

sqle - the exception

Returns:

whether it is a cancel