org.datanucleus.store.rdbms.adapter
Class OracleAdapter

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

All Implemented Interfaces:

org.datanucleus.store.mapped.DatastoreAdapter, RDBMSAdapter

public class OracleAdapter
extends DatabaseAdapter

Provides methods for adapting SQL language elements to the Oracle database.

See Also:

DatabaseAdapter

Field Summary

static String	OJDBC_DRIVER_NAME What the official Oracle JDBC driver uses to identify itself.
static String	ORACLE_10_RESERVED_WORDS A string containing the list of Oracle keywords This list is normally obtained dynamically from the driver using DatabaseMetaData.getSQLKeywords() Based on database Oracle10g
static String	ORACLE_8_RESERVED_WORDS A string containing the list of Oracle keywords This list is normally obtained dynamically from the driver using DatabaseMetaData.getSQLKeywords() Based on database Oracle8
static String	ORACLE_9_RESERVED_WORDS A string containing the list of Oracle keywords This list is normally obtained dynamically from the driver using DatabaseMetaData.getSQLKeywords() Based on database Oracle9i

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

OracleAdapter(DatabaseMetaData metadata)
Constructs an Oracle adapter based on the given JDBC metadata.

Method Summary

String	getCatalogName(Connection conn) Accessor for the Catalog Name for this datastore.
ResultSet	getColumns(Connection conn, String catalog, String schema, String table, String columnNamePattern) Accessor for table and column information for a catalog/schema in this datastore.
String	getDatastoreDateStatement() Accessor for a statement that will return the statement to use to get the datastore date.
String	getDropTableStatement(org.datanucleus.store.mapped.DatastoreContainerObject table) Method to return the drop table statement for Oracle.
ResultSet	getExistingIndexes(Connection conn, String catalog, String schema, String table) Provide the existing indexes in the database for the table.
org.datanucleus.store.mapped.mapping.MappingManager	getMappingManager(org.datanucleus.store.mapped.MappedStoreManager storeMgr) Accessor for a MappingManager suitable for use with this datastore adapter.
String	getOrderString(org.datanucleus.store.StoreManager storeMgr, String orderString, SQLExpression sqlExpr) Convenience method to allow adaption of an ordering string before applying it.
String	getRangeByRowNumberColumn2() Method to return the column name to use when handling ranges via a rownumber on the select using the second method (Oracle).
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	getSurrogateForEmptyStrings() Some databases, Oracle, treats an empty string (0 length) equals null
int	getTransactionIsolationForSchemaCreation() Accessor for the transaction isolation level to use during schema creation.
String	getVendorID() Accessor for the vendor id
void	initialiseTypes(org.datanucleus.store.schema.StoreSchemaHandler handler, org.datanucleus.store.connection.ManagedConnection mconn) Initialise the types for this datastore.
boolean	isStatementTimeout(SQLException sqle) return whether this exception represents a timed out statement.
RDBMSColumnInfo	newRDBMSColumnInfo(ResultSet rs) Method to create a column info for the current row.
SQLTypeInfo	newSQLTypeInfo(ResultSet rs) Create a new SQL type info from the current row of the passed ResultSet.
boolean	validToSelectMappingInStatement(SQLStatement stmt, org.datanucleus.store.mapped.mapping.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.DatabaseAdapter

addSQLTypeForJDBCType, getAdapterTime, getAddCandidateKeyStatement, getAddColumnStatement, getAddForeignKeyStatement, getAddPrimaryKeyStatement, getAutoIncrementKeyword, getAutoIncrementStmt, getCatalogSeparator, getCheckConstraintForValues, getContinuationString, getCreateIndexStatement, getCreateTableStatement, getDatastoreDriverName, getDatastoreDriverVersion, getDatastoreIdentifierMaxLength, getDatastoreProductName, getDatastoreProductVersion, getDeleteTableStatement, getDriverMajorVersion, getDriverMinorVersion, getDropViewStatement, getEscapeCharacter, getEscapePatternExpression, getIdentifierQuoteString, getInsertStatementForNoColumns, getMaxForeignKeys, getMaxIndexes, getMiliseconds, getNewUUIDFunction, getNumericConversionFunction, getOperatorConcat, getPatternExpressionAnyCharacter, getPatternExpressionZeroMoreCharacters, getRangeByLimitEndOfStatementClause, getRangeByRowNumberColumn, getRequiredTransactionIsolationLevel, getSelectForUpdateText, getSelectNewUUIDStmt, getSelectWithLockOption, getSQLTypeInfoForJdbcType, getSupportedOptions, getTime, getUnlimitedLengthPrecisionValue, getValueForProperty, initialiseDatastore, isIdentityFieldDataType, isKeyword, isReservedKeyword, isStatementCancel, isValidPrimaryKeyType, iteratorReservedWords, newFKInfo, parseKeywordList, removeUnsupportedMappings, setProperties, supportsOption, supportsQueryFetchSize, supportsTransactionIsolation, toString

Methods inherited from class java.lang.Object

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

Field Detail

OJDBC_DRIVER_NAME

public static final String OJDBC_DRIVER_NAME

What the official Oracle JDBC driver uses to identify itself.

See Also:

Constant Field Values

ORACLE_8_RESERVED_WORDS

public static final String ORACLE_8_RESERVED_WORDS

A string containing the list of Oracle keywords This list is normally obtained dynamically from the driver using DatabaseMetaData.getSQLKeywords() Based on database Oracle8

See Also:

Constant Field Values

ORACLE_9_RESERVED_WORDS

public static final String ORACLE_9_RESERVED_WORDS

A string containing the list of Oracle keywords This list is normally obtained dynamically from the driver using DatabaseMetaData.getSQLKeywords() Based on database Oracle9i

See Also:

Constant Field Values

ORACLE_10_RESERVED_WORDS

public static final String ORACLE_10_RESERVED_WORDS

A string containing the list of Oracle keywords This list is normally obtained dynamically from the driver using DatabaseMetaData.getSQLKeywords() Based on database Oracle10g

See Also:

Constant Field Values

Constructor Detail

OracleAdapter

public OracleAdapter(DatabaseMetaData metadata)

Constructs an Oracle adapter based on the given JDBC metadata.

Parameters:

metadata - the database metadata.

Method Detail

initialiseTypes

public void initialiseTypes(org.datanucleus.store.schema.StoreSchemaHandler handler,
                            org.datanucleus.store.connection.ManagedConnection mconn)

Initialise the types for this datastore.

Specified by:

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

Overrides:

initialiseTypes in class DatabaseAdapter

Parameters:

handler - SchemaHandler that we initialise the types for

mconn - Managed connection to use

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

getMappingManager

public org.datanucleus.store.mapped.mapping.MappingManager getMappingManager(org.datanucleus.store.mapped.MappedStoreManager storeMgr)

Accessor for a MappingManager suitable for use with this datastore adapter.

Specified by:

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

Overrides:

getMappingManager in class DatabaseAdapter

Parameters:

storeMgr - The StoreManager

Returns:

the MappingManager

getVendorID

public String getVendorID()

Accessor for the vendor id

Specified by:

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

Overrides:

getVendorID in class DatabaseAdapter

Returns:

The Oracle vendor id

getSurrogateForEmptyStrings

public String getSurrogateForEmptyStrings()

Some databases, Oracle, treats an empty string (0 length) equals null

Specified by:

getSurrogateForEmptyStrings in interface RDBMSAdapter

Overrides:

getSurrogateForEmptyStrings in class DatabaseAdapter

Returns:

returns a surrogate to replace the empty string in the database otherwise it would be treated as null

getCatalogName

public String getCatalogName(Connection conn)
                      throws SQLException

Description copied from class: DatabaseAdapter

Accessor for the Catalog Name for this datastore.

Specified by:

getCatalogName in interface RDBMSAdapter

Overrides:

getCatalogName in class DatabaseAdapter

Parameters:

conn - Connection to the datastore

Returns:

null, because oracle does not have catalogs

Throws:

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

getSchemaName

public String getSchemaName(Connection conn)
                     throws SQLException

Description copied from class: DatabaseAdapter

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.

getExistingIndexes

public ResultSet getExistingIndexes(Connection conn,
                                    String catalog,
                                    String schema,
                                    String table)
                             throws SQLException

Provide the existing indexes in the database for the table. This is implemented if and only if the datastore has its own way of getting indexes. In this implementation we provide an alternate method for Oracle JDBC driver < 10.2.0.1.0 only. All other versions of Oracle will use the default. The schemaName MUST BE PROVIDED.

Specified by:

getExistingIndexes in interface RDBMSAdapter

Overrides:

getExistingIndexes in class DatabaseAdapter

Parameters:

conn - the JDBC connection

catalog - the catalog name

schema - the schema name.

table - the table name

Returns:

a ResultSet with the format @see DatabaseMetaData#getIndexInfo(java.lang.String, java.lang.String, java.lang.String, boolean, boolean)

Throws:

SQLException

getDropTableStatement

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

Method to return the drop table statement for Oracle.

Specified by:

getDropTableStatement in interface RDBMSAdapter

Overrides:

getDropTableStatement in class DatabaseAdapter

Parameters:

table - The table

Returns:

The statement text

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

newRDBMSColumnInfo

public RDBMSColumnInfo newRDBMSColumnInfo(ResultSet rs)

Method to create a column info for the current row. Overrides the dataType to cater for Oracle particularities.

Specified by:

newRDBMSColumnInfo in interface RDBMSAdapter

Overrides:

newRDBMSColumnInfo in class DatabaseAdapter

Parameters:

rs - ResultSet from DatabaseMetaData.getColumns()

Returns:

column info

getTransactionIsolationForSchemaCreation

public int getTransactionIsolationForSchemaCreation()

Accessor for the transaction isolation level to use during schema creation.

Specified by:

getTransactionIsolationForSchemaCreation in interface RDBMSAdapter

Overrides:

getTransactionIsolationForSchemaCreation in class DatabaseAdapter

Returns:

The transaction isolation level for schema generation process

getColumns

public ResultSet getColumns(Connection conn,
                            String catalog,
                            String schema,
                            String table,
                            String columnNamePattern)
                     throws SQLException

Accessor for table and column information for a catalog/schema in this datastore. An override for the DatabaseMetaData.getColumns() method call as referenced in superclass. The default Oracle-provided getColumns() method is VERY slow for large schemas, particularly due to REMARKS and COLUMN_DEF (column defaults) columns (outer-joins in data dictionary views) Note: This method DOES NOT return default column value (meta-data ResultSet column COLUMN_DEF) as this column causes MAJOR slowdown in meta-data retrieval performance.

Specified by:

getColumns in interface RDBMSAdapter

Overrides:

getColumns in class DatabaseAdapter

Parameters:

conn - Connection to use

catalog - The catalog (null if none)

schema - The schema (null if none)

table - The table (null if all)

columnNamePattern - Col name(s) (null if all) NOT USED

Returns:

ResultSet containing the table/column information

Throws:

SQLException - Thrown if an error occurs

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 RDBMSAdapter

Overrides:

getDatastoreDateStatement in class DatabaseAdapter

Returns:

SQL statement to get the datastore date

getOrderString

public String getOrderString(org.datanucleus.store.StoreManager storeMgr,
                             String orderString,
                             SQLExpression sqlExpr)

Convenience method to allow adaption of an ordering string before applying it. This is useful where the datastore accepts some conversion adapter around the ordering column for example.

Specified by:

getOrderString in interface RDBMSAdapter

Overrides:

getOrderString in class DatabaseAdapter

Parameters:

storeMgr - StoreManager

orderString - The basic ordering string

sqlExpr - The sql expression being represented here

Returns:

The adapted ordering string

isStatementTimeout

public boolean isStatementTimeout(SQLException sqle)

Description copied from class: DatabaseAdapter

return whether this exception represents a timed out statement.

Specified by:

isStatementTimeout in interface RDBMSAdapter

Overrides:

isStatementTimeout in class DatabaseAdapter

Parameters:

sqle - the exception

Returns:

whether it is a timeout

validToSelectMappingInStatement

public boolean validToSelectMappingInStatement(SQLStatement stmt,
                                               org.datanucleus.store.mapped.mapping.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 RDBMSAdapter

Overrides:

validToSelectMappingInStatement in class DatabaseAdapter

Parameters:

stmt - The statement

m - The mapping that we want to select

Returns:

Whether it is valid

getRangeByRowNumberColumn2

public String getRangeByRowNumberColumn2()

Description copied from class: DatabaseAdapter

Method to return the column name to use when handling ranges via a rownumber on the select using the second method (Oracle). Defaults to an empty string (not supported).

Specified by:

getRangeByRowNumberColumn2 in interface RDBMSAdapter

Overrides:

getRangeByRowNumberColumn2 in class DatabaseAdapter

Returns:

The row number column.