org.datanucleus.store.rdbms.adapter

Class DerbyAdapter

java.lang.Object

org.datanucleus.store.rdbms.adapter.BaseDatastoreAdapter

org.datanucleus.store.rdbms.adapter.DerbyAdapter

All Implemented Interfaces:

DatastoreAdapter

public class DerbyAdapter
extends BaseDatastoreAdapter

Provides methods for adapting SQL language elements to the Cloudscape/Derby database.

Field Summary

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

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

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

ACCESS_PARENTQUERY_IN_SUBQUERY_JOINED, ALLOW_TABLE_ALIAS_IN_UPDATE_SET_CLAUSE, ALTER_TABLE_DROP_CONSTRAINT_SYNTAX, ALTER_TABLE_DROP_FOREIGN_KEY_CONSTRAINT, ANALYSIS_METHODS, ANSI_CROSSJOIN_SYNTAX, ANSI_JOIN_SYNTAX, AUTO_INCREMENT_COLUMN_TYPE_SPECIFICATION, AUTO_INCREMENT_KEYS_NULL_SPECIFICATION, AUTO_INCREMENT_PK_IN_CREATE_TABLE_COLUMN_DEF, BIT_IS_REALLY_BOOLEAN, BLOB_SET_USING_SETSTRING, BOOLEAN_COMPARISON, CATALOGS_IN_TABLE_DEFINITIONS, 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, ESCAPE_EXPRESSION_IN_LIKE_PREDICATE, 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, HOLD_CURSORS_OVER_COMMIT, IDENTIFIERS_LOWERCASE, IDENTIFIERS_LOWERCASE_QUOTED, IDENTIFIERS_MIXEDCASE, IDENTIFIERS_MIXEDCASE_QUOTED, IDENTIFIERS_MIXEDCASE_QUOTED_SENSITIVE, IDENTIFIERS_MIXEDCASE_SENSITIVE, IDENTIFIERS_UPPERCASE, IDENTIFIERS_UPPERCASE_QUOTED, IDENTITY_COLUMNS, 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_NULLS_DIRECTIVES, ORDERBY_USING_SELECT_COLUMN_INDEX, PERSIST_OF_UNASSIGNED_CHAR, PRIMARYKEY_IN_CREATE_STATEMENTS, PROJECTION_IN_TABLE_REFERENCE_JOINS, RESULTSET_TYPE_FORWARD_ONLY, RESULTSET_TYPE_SCROLL_INSENSITIVE, RESULTSET_TYPE_SCROLL_SENSITIVE, SCHEMAS_IN_TABLE_DEFINITIONS, SEQUENCES, 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, USE_UNION_ALL, VIEWS

Constructor Summary

Constructors

Constructor and Description
DerbyAdapter(DatabaseMetaData metadata) Constructs an Apache Derby adapter based on the given JDBC metadata.

Method Summary

Modifier and Type	Method and Description
String	getAddCandidateKeyStatement(CandidateKey ck, IdentifierFactory factory) Returns the appropriate SQL to add a candidate key to its table.
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.
String	getCatalogName(Connection conn) Accessor for the catalog name.
String	getDatastoreDateStatement() Accessor for a statement that will return the statement to use to get the datastore date.
String	getDropDatabaseStatement(String catalogName, String schemaName) Method to return the statement necessary to drop a database with this RDBMS.
String	getDropTableStatement(Table table) Returns the appropriate SQL to drop the given table.
String	getInsertStatementForNoColumns(Table table) Method to return the INSERT statement to use when inserting into a table that has no columns specified.
String	getNumericConversionFunction() Accessor for the function to use for converting to numeric.
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 OFFSET/FETCH keywords.
String	getSchemaName(Connection conn) Accessor for the schema name.
String	getSelectForUpdateText() Method returning the text to append to the end of the SELECT to perform the equivalent of "SELECT ...
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.
void	initialiseDatastore(Object conn) Creates the auxiliary functions/procedures in the schema
boolean	isIdentityFieldDataType(String columnDef) Verifies if the given columnDef is auto incremented by the datastore.
boolean	isStatementCancel(SQLException sqle) return whether this exception represents a cancelled statement.
SQLTypeInfo	newSQLTypeInfo(ResultSet rs) Create a new SQL type info from the current row of the passed ResultSet.
boolean	validToSelectMappingInStatement(SQLStatement stmt, JavaTypeMapping m) Method to return if it is valid to select the specified mapping for the specified statement for this datastore adapter.

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

addSQLTypeForJDBCType, getAdapterTime, getAddColumnStatement, getAddForeignKeyStatement, getAddPrimaryKeyStatement, getAutoIncrementJavaTypeForType, getCatalogSeparator, getCheckConstraintForValues, getColumns, getContinuationString, getCreateDatabaseStatement, getCreateIndexStatement, getCreateTableStatement, getDatastoreDriverName, getDatastoreDriverVersion, getDatastoreIdentifierMaxLength, getDatastoreProductName, getDatastoreProductVersion, getDeleteTableStatement, getDriverMajorVersion, getDriverMinorVersion, getDropViewStatement, getEscapeCharacter, getEscapePatternExpression, getExistingIndexes, getIdentifierQuoteString, getJDBCTypeForName, getMappingManager, getMaxForeignKeys, getMaxIndexes, getMiliseconds, getNameForJDBCType, getNewUUIDFunction, getOperatorConcat, getOrderString, getPatternExpressionAnyCharacter, getPatternExpressionZeroMoreCharacters, getRangeByRowNumberColumn, getRangeByRowNumberColumn2, getRequiredTransactionIsolationLevel, getSelectNewUUIDStmt, getSelectWithLockOption, getSQLTypeInfoForJdbcType, getSupportedOptions, getSurrogateForEmptyStrings, getTime, getTransactionIsolationForSchemaCreation, getUnlimitedLengthPrecisionValue, getUpdateTableStatement, getValueForProperty, initialiseTypes, isReservedKeyword, isStatementTimeout, isValidPrimaryKeyType, iteratorReservedWords, newFKInfo, newRDBMSColumnInfo, removeUnsupportedMappings, sequenceExists, setProperties, supportsOption, supportsQueryFetchSize, supportsTransactionIsolation, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

DerbyAdapter

public DerbyAdapter(DatabaseMetaData metadata)

Constructs an Apache Derby adapter based on the given JDBC metadata.

Parameters:

metadata - the database metadata.

Method Detail

initialiseDatastore

public void initialiseDatastore(Object conn)

Creates the auxiliary functions/procedures in the schema

Specified by:

initialiseDatastore in interface DatastoreAdapter

Overrides:

initialiseDatastore in class BaseDatastoreAdapter

Parameters:

conn - the connection to the datastore

getSchemaName

public String getSchemaName(Connection conn)
                     throws SQLException

Accessor for the schema name.

Specified by:

getSchemaName in interface DatastoreAdapter

Overrides:

getSchemaName in class BaseDatastoreAdapter

Parameters:

conn - The Connection to use

Returns:

The schema name used by this connection

Throws:

SQLException - if an error occurs

getCatalogName

public String getCatalogName(Connection conn)
                      throws SQLException

Accessor for the catalog name.

Specified by:

getCatalogName in interface DatastoreAdapter

Overrides:

getCatalogName in class BaseDatastoreAdapter

Parameters:

conn - The Connection to use

Returns:

The catalog name used by this connection

Throws:

SQLException - if an error occurs

getVendorID

public String getVendorID()

Accessor for the vendor id.

Specified by:

getVendorID in interface DatastoreAdapter

Overrides:

getVendorID in class BaseDatastoreAdapter

Returns:

The vendor id.

newSQLTypeInfo

public SQLTypeInfo newSQLTypeInfo(ResultSet rs)

Description copied from interface: DatastoreAdapter

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 DatastoreAdapter

Overrides:

newSQLTypeInfo in class BaseDatastoreAdapter

Parameters:

rs - ResultSet

Returns:

The SQL type info

getDropDatabaseStatement

public String getDropDatabaseStatement(String catalogName,
                                       String schemaName)

Description copied from interface: DatastoreAdapter

Method to return the statement necessary to drop a database with this RDBMS. Note that some RDBMS don't support this.

Specified by:

getDropDatabaseStatement in interface DatastoreAdapter

Overrides:

getDropDatabaseStatement in class BaseDatastoreAdapter

Parameters:

catalogName - Name of the catalog

schemaName - Name of the schema

Returns:

The DDL statement

getDropTableStatement

public String getDropTableStatement(Table table)

Description copied from class: BaseDatastoreAdapter

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

 DROP TABLE FOO CASCADE
 

Specified by:

getDropTableStatement in interface DatastoreAdapter

Overrides:

getDropTableStatement in class BaseDatastoreAdapter

Parameters:

table - The table to drop.

Returns:

The text of the SQL statement.

getAddCandidateKeyStatement

public String getAddCandidateKeyStatement(CandidateKey ck,
                                          IdentifierFactory factory)

Returns the appropriate SQL to add a candidate key to its table. It should return something like:

CREATE [UNIQUE] INDEX FOO_CK ON TBL (COL1 [, COL2])

Specified by:

getAddCandidateKeyStatement in interface DatastoreAdapter

Overrides:

getAddCandidateKeyStatement in class BaseDatastoreAdapter

Parameters:

ck - An object describing the candidate key.

factory - Identifier factory

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 DatastoreAdapter

Overrides:

getAutoIncrementStmt in class BaseDatastoreAdapter

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 DatastoreAdapter

Overrides:

getAutoIncrementKeyword in class BaseDatastoreAdapter

Returns:

The keyword for a column using auto-increment

isIdentityFieldDataType

public boolean isIdentityFieldDataType(String columnDef)

Verifies if the given columnDef is auto incremented by the datastore.

Specified by:

isIdentityFieldDataType in interface DatastoreAdapter

Overrides:

isIdentityFieldDataType in class BaseDatastoreAdapter

Parameters:

columnDef - the datastore type name

Returns:

true when the columnDef has values auto incremented by the datastore

getInsertStatementForNoColumns

public String getInsertStatementForNoColumns(Table table)

Method to return 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 DatastoreAdapter

Overrides:

getInsertStatementForNoColumns in class BaseDatastoreAdapter

Parameters:

table - The table

Returns:

The INSERT statement

getDatastoreDateStatement

public String getDatastoreDateStatement()

Accessor for a statement that will return the statement to use to get the datastore date.

Specified by:

getDatastoreDateStatement in interface DatastoreAdapter

Overrides:

getDatastoreDateStatement in class BaseDatastoreAdapter

Returns:

SQL statement to get the datastore date

getSelectForUpdateText

public String getSelectForUpdateText()

Method returning the text to append to the end of the SELECT to perform the equivalent of "SELECT ... FOR UPDATE" (on some RDBMS). Derby doesn't support "FOR UPDATE" in all situations and has a similar one "WITH RR" See https://issues.apache.org/jira/browse/DERBY-3900

Specified by:

getSelectForUpdateText in interface DatastoreAdapter

Overrides:

getSelectForUpdateText in class BaseDatastoreAdapter

Returns:

The "FOR UPDATE" style text

validToSelectMappingInStatement

public boolean validToSelectMappingInStatement(SQLStatement stmt,
                                               JavaTypeMapping m)

Method to return if it is valid to select the specified mapping for the specified statement for this datastore adapter. Sometimes, dependent on the type of the column(s), and what other components are present in the statement, it may be invalid to select the mapping. This implementation returns true, so override in database-specific subclass as required.

Specified by:

validToSelectMappingInStatement in interface DatastoreAdapter

Overrides:

validToSelectMappingInStatement in class BaseDatastoreAdapter

Parameters:

stmt - The statement

m - The mapping that we want to select

Returns:

Whether it is valid

getNumericConversionFunction

public String getNumericConversionFunction()

Accessor for the function to use for converting to numeric.

Specified by:

getNumericConversionFunction in interface DatastoreAdapter

Overrides:

getNumericConversionFunction in class BaseDatastoreAdapter

Returns:

The numeric conversion function for this datastore.

isStatementCancel

public boolean isStatementCancel(SQLException sqle)

return whether this exception represents a cancelled statement.

Specified by:

isStatementCancel in interface DatastoreAdapter

Overrides:

isStatementCancel in class BaseDatastoreAdapter

Parameters:

sqle - the exception

Returns:

whether it is a cancel

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 OFFSET/FETCH keywords.

Specified by:

getRangeByLimitEndOfStatementClause in interface DatastoreAdapter

Overrides:

getRangeByLimitEndOfStatementClause in class BaseDatastoreAdapter

Parameters:

offset - The offset to return from

count - The number of items to return

Returns:

The SQL to append to allow for ranges using OFFSET/FETCH.

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 DatastoreAdapter

Overrides:

getSequenceCreateStmt in class BaseDatastoreAdapter

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 DatastoreAdapter

Overrides:

getSequenceNextStmt in class BaseDatastoreAdapter

Parameters:

sequence_name - Name of the sequence

Returns:

The statement for getting the next id for the sequence