org.datanucleus.store.rdbms.adapter
Interface RDBMSAdapter

All Superinterfaces:

org.datanucleus.store.mapped.DatastoreAdapter

All Known Implementing Classes:

DatabaseAdapter, DB2Adapter, DB2AS400Adapter, DerbyAdapter, FirebirdAdapter, H2Adapter, HSQLAdapter, InformixAdapter, McKoiAdapter, MSSQLServerAdapter, MySQLAdapter, OracleAdapter, PointbaseAdapter, PostgreSQLAdapter, SAPDBAdapter, SQLiteAdapter, SybaseAdapter, TimesTenAdapter

public interface RDBMSAdapter
extends org.datanucleus.store.mapped.DatastoreAdapter

Adapter for relational databases.

Field Summary

static String	ACCESS_PARENTQUERY_IN_SUBQUERY_JOINED Whether this database supports joining outer and inner queries using columns.
static String	ALTER_TABLE_DROP_CONSTRAINT_SYNTAX Whether this datastore supports ALTER TABLE DROP constraints
static String	ALTER_TABLE_DROP_FOREIGN_KEY_CONSTRAINT Whether this datastore supports ALTER TABLE DROP FOREIGN KEY constraints
static String	ANSI_CROSSJOIN_SYNTAX Accessor for whether the RDBMS supports ANSI cross-join syntax.
static String	ANSI_JOIN_SYNTAX Accessor for whether the RDBMS supports ANSI join syntax.
static String	AUTO_INCREMENT_COLUMN_TYPE_SPECIFICATION Whether we support auto-increment/identity keys with column type specification.
static String	AUTO_INCREMENT_KEYS_NULL_SPECIFICATION Whether we support auto-increment/identity keys with nullability specification.
static String	AUTO_INCREMENT_PK_IN_CREATE_TABLE_COLUMN_DEF Whether this adapter requires any specification of primary key in the column definition of CREATE TABLE.
static String	BLOB_SET_USING_SETSTRING Accessor for whether setting a BLOB value allows use of PreparedStatement.setString()
static String	CHAR_COLUMNS_PADDED_WITH_SPACES Some databases store character strings in CHAR(XX) columns and when read back in have been padded with spaces.
static String	CHECK_IN_CREATE_STATEMENTS Whether this datastore supports the use of "CHECK" in CREATE TABLE statements (DDL).
static String	CHECK_IN_END_CREATE_STATEMENTS Whether this datastore supports the use of CHECK after the column definitions in the CREATE TABLE statements (DDL).
static String	CLOB_SET_USING_SETSTRING Accessor for whether setting a CLOB value allows use of PreparedStatement.setString()
static String	CREATE_INDEXES_BEFORE_FOREIGN_KEYS Whether to create indexes before foreign keys.
static String	CROSSJOIN_ASINNER11_SYNTAX Accessor for whether the RDBMS supports cross-join as "INNER 1=1" syntax.
static String	DATETIME_STORES_MILLISECS Whether DATETIME stores milliseconds.
static String	DEFAULT_BEFORE_NULL_IN_COLUMN_OPTIONS Whether any DEFAULT tag will be before any NULL/NOT NULL in the column options.
static String	DEFAULT_KEYWORD_IN_COLUMN_OPTIONS Whether we support DEFAULT tag in CREATE TABLE statements
static String	DEFAULT_KEYWORD_WITH_NOT_NULL_IN_COLUMN_OPTIONS Whether we support DEFAULT tag together with NOT NULL in CREATE TABLE statements.
static String	DEFERRED_CONSTRAINTS Whether this datastore supports deferred constraints.
static String	DISTINCT_WITH_SELECT_FOR_UPDATE Whether this datastore supports using DISTINCT when using SELECT ...
static String	EXISTS_SYNTAX Whether the RDBMS supports use of EXISTS syntax.
static String	FK_DELETE_ACTION_CASCADE
static String	FK_DELETE_ACTION_DEFAULT
static String	FK_DELETE_ACTION_NULL
static String	FK_DELETE_ACTION_RESTRICT
static String	FK_IN_END_CREATE_STATEMENTS Whether this datastore supports the use of FOREIGN KEY after the column definitions in CREATE TABLE statements (DDL).
static String	FK_UPDATE_ACTION_CASCADE
static String	FK_UPDATE_ACTION_DEFAULT
static String	FK_UPDATE_ACTION_NULL
static String	FK_UPDATE_ACTION_RESTRICT
static String	GET_GENERATED_KEYS_STATEMENT Whether the datastore supports "Statement.getGeneratedKeys".
static String	INCLUDE_ORDERBY_COLS_IN_SELECT Whether to include any ORDER BY columns in a SELECT.
static String	LOCK_OPTION_PLACED_AFTER_FROM Whether the lock option (when doing SELECT FOR UPDATE) is to be placed after the FROM.
static String	LOCK_OPTION_PLACED_WITHIN_JOIN Whether the lock option (when doing SELECT FOR UPDATE) is to be placed within the JOIN clause.
static String	LOCK_WITH_SELECT_FOR_UPDATE Whether this datastore supports SELECT ...
static String	NULL_EQUALS_EMPTY_STRING Some databases, Oracle, treats an empty string (0 length) equals null.
static String	NULLS_IN_CANDIDATE_KEYS Whether we support NULLs in candidate keys.
static String	NULLS_KEYWORD_IN_COLUMN_OPTIONS Whether the database support NULLs in the column options for table creation.
static String	ORDERBY_USING_SELECT_COLUMN_INDEX In SAPDB any orderby has to be using the index(es) of any SELECT column(s) rather than their name(s).
static String	PERSIST_OF_UNASSIGNED_CHAR Whether the database server supports persist of an unassigned character ("0x0").
static String	PRIMARYKEY_IN_CREATE_STATEMENTS Whether the datastore supports specification of the primary key in CREATE TABLE statements.
static String	STATEMENT_BATCHING Whether this datastore supports batching of statements.
static String	STORED_PROCEDURES Whether this datastore supports stored procedures.
static String	TX_ISOLATION_NONE
static String	TX_ISOLATION_READ_COMMITTED
static String	TX_ISOLATION_READ_UNCOMMITTED
static String	TX_ISOLATION_REPEATABLE_READ
static String	TX_ISOLATION_SERIALIZABLE
static String	UNION_SYNTAX Whether the RDBMS supports UNION syntax.
static String	UNIQUE_IN_END_CREATE_STATEMENTS Whether this datastore supports the use of UNIQUE after the column definitions in CREATE TABLE statements (DDL).
static String	UPDATE_MULTITABLE Whether this datastore supports multiple table update statements.
static String	USE_UNION_ALL Union combines the results of two or more queries into a single result set.
static String	VIEWS Whether the RDBMS supports SQL 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

Method Summary

String	getAddCandidateKeyStatement(CandidateKey ck, org.datanucleus.store.mapped.IdentifierFactory factory) Returns the appropriate SQL to add a candidate key to its table.
String	getAddColumnStatement(org.datanucleus.store.mapped.DatastoreContainerObject table, Column col) Accessor for the SQL statement to add a column to a table.
String	getAddForeignKeyStatement(ForeignKey fk, org.datanucleus.store.mapped.IdentifierFactory factory) Returns the appropriate SQL to add a foreign key to its table.
String	getAddPrimaryKeyStatement(PrimaryKey pk, org.datanucleus.store.mapped.IdentifierFactory factory) Returns the appropriate SQL to add a primary key to its table.
String	getAutoIncrementKeyword() Accessor for the auto-increment/identity keyword for generating DDLs.
String	getAutoIncrementStmt(Table table, String columnName) Accessor for the auto-increment/identity sql statement for this datastore.
String	getCatalogName(Connection conn) Accessor for the Catalog Name for this datastore.
String	getCheckConstraintForValues(org.datanucleus.store.mapped.DatastoreIdentifier identifier, Object[] values, boolean nullable) Creates a CHECK constraint definition based on the given values e.g.
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	getCreateIndexStatement(Index idx, org.datanucleus.store.mapped.IdentifierFactory factory) Returns the appropriate SQL to add an index to its table.
String	getCreateTableStatement(TableImpl table, Column[] columns, Properties props, org.datanucleus.store.mapped.IdentifierFactory factory) Returns the appropriate SQL to create the given table having the given columns.
String	getDatastoreDateStatement() Accessor for a statement that will return the statement to use to get the datastore date.
String	getDeleteTableStatement(SQLTable tbl) Method to return the basic SQL for a DELETE TABLE statement.
String	getDropTableStatement(org.datanucleus.store.mapped.DatastoreContainerObject table) Returns the appropriate SQL to drop the given table.
String	getDropViewStatement(ViewImpl view) Returns the appropriate SQL to drop the given view.
ResultSet	getExistingIndexes(Connection conn, String catalog, String schema, String table) Provide the existing indexes in the database for the table
String	getInsertStatementForNoColumns(Table table) Method to retutn the INSERT statement to use when inserting into a table that has no columns specified.
String	getOrderString(org.datanucleus.store.StoreManager storeMgr, String orderString, SQLExpression sqlExpr) Convenience method to allow adaption of an ordering string before applying it.
String	getRangeByLimitEndOfStatementClause(long offset, long count) Method to return the SQL to append to the end of the SELECT statement to handle restriction of ranges using the LIMIT keyword.
String	getRangeByRowNumberColumn() Method to return the column name to use when handling ranges via a rownumber on the select using the original method (DB2).
String	getRangeByRowNumberColumn2() Method to return the column name to use when handling ranges via a rownumber on the select using the second method (Oracle).
int	getRequiredTransactionIsolationLevel() Accessor for the "required" transaction isolation level if it has to be a certain value for this adapter.
String	getSchemaName(Connection conn) Accessor for the Schema Name for this datastore.
String	getSelectNewUUIDStmt() The function to creates a unique value of type uniqueidentifier.
String	getSelectWithLockOption() The option to specify in "SELECT ...
String	getSequenceCreateStmt(String sequence_name, Integer min, Integer max, Integer start, Integer increment, Integer cache_size) Accessor for the sequence create statement for this datastore.
String	getSequenceNextStmt(String sequence_name) Accessor for the sequence statement to get the next id 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.
int	getUnlimitedLengthPrecisionValue(SQLTypeInfo typeInfo) Returns the precision value to be used when creating string columns of "unlimited" length.
boolean	isStatementCancel(SQLException sqle) return whether this exception represents a cancelled statement.
boolean	isStatementTimeout(SQLException sqle) return whether this exception represents a timed out statement.
boolean	isValidPrimaryKeyType(int datatype) Method to return whether the specified JDBC type is valid for use in a PrimaryKey.
Iterator	iteratorReservedWords() Iterator for the reserved words constructed from the method DataBaseMetaData.getSQLKeywords + standard SQL reserved words
ForeignKeyInfo	newFKInfo(ResultSet rs) Method to return ForeignKeyInfo for the current row of the ResultSet which will have been obtained from a call to DatabaseMetaData.getImportedKeys() or DatabaseMetaData.getExportedKeys().
RDBMSColumnInfo	newRDBMSColumnInfo(ResultSet rs) Create a new column info from the current row of the passed ResultSet.
SQLTypeInfo	newSQLTypeInfo(ResultSet rs) Create a new SQL type info from the current row of the passed ResultSet.
boolean	supportsTransactionIsolation(int level) Accessor for whether this database adapter supports the specified transaction isolation.
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 interface org.datanucleus.store.mapped.DatastoreAdapter

getAdapterTime, getCatalogSeparator, getDatastoreDriverName, getDatastoreDriverVersion, getDatastoreIdentifierMaxLength, getDatastoreProductName, getDatastoreProductVersion, getIdentifierQuoteString, getMappingManager, getMaxForeignKeys, getMaxIndexes, getSupportedOptions, getVendorID, initialiseDatastore, initialiseTypes, isIdentityFieldDataType, isReservedKeyword, removeUnsupportedMappings, setProperties, supportsOption, supportsQueryFetchSize, toString

Field Detail

VIEWS

static final String VIEWS

Whether the RDBMS supports SQL VIEWs.

See Also:

Constant Field Values

UNION_SYNTAX

static final String UNION_SYNTAX

Whether the RDBMS supports UNION syntax.

See Also:

Constant Field Values

USE_UNION_ALL

static final String USE_UNION_ALL

Union combines the results of two or more queries into a single result set. Union include only distinct rows and Union all may include duplicates. When using the UNION statement, keep in mind that, by default, it performs the equivalent of a SELECT DISTINCT on the final result set. In other words, UNION takes the results of two like recordsets, combines them, and then performs a SELECT DISTINCT in order to eliminate any duplicate rows. This process occurs even if there are no duplicate records in the final recordset. If you know that there are duplicate records, and this presents a problem for your application, then by all means use the UNION statement to eliminate the duplicate rows. On the other hand, if you know that there will never be any duplicate rows, or if there are, and this presents no problem to your application, then you should use the UNION ALL statement instead of the UNION statement. The advantage of the UNION ALL is that is does not perform the SELECT DISTINCT function, which saves a lot of unnecessary SQL Server resources from being using.

See Also:

Constant Field Values

EXISTS_SYNTAX

static final String EXISTS_SYNTAX

Whether the RDBMS supports use of EXISTS syntax.

See Also:

Constant Field Values

ALTER_TABLE_DROP_CONSTRAINT_SYNTAX

static final String ALTER_TABLE_DROP_CONSTRAINT_SYNTAX

Whether this datastore supports ALTER TABLE DROP constraints

See Also:

Constant Field Values

ALTER_TABLE_DROP_FOREIGN_KEY_CONSTRAINT

static final String ALTER_TABLE_DROP_FOREIGN_KEY_CONSTRAINT

Whether this datastore supports ALTER TABLE DROP FOREIGN KEY constraints

See Also:

Constant Field Values

DEFERRED_CONSTRAINTS

static final String DEFERRED_CONSTRAINTS

Whether this datastore supports deferred constraints.

See Also:

Constant Field Values

DISTINCT_WITH_SELECT_FOR_UPDATE

static final String DISTINCT_WITH_SELECT_FOR_UPDATE

Whether this datastore supports using DISTINCT when using SELECT ... FOR UPDATE.

See Also:

Constant Field Values

PERSIST_OF_UNASSIGNED_CHAR

static final String PERSIST_OF_UNASSIGNED_CHAR

Whether the database server supports persist of an unassigned character ("0x0"). If not, any unassigned character will be replaced by " " (space) on persist.

See Also:

Constant Field Values

CHAR_COLUMNS_PADDED_WITH_SPACES

static final String CHAR_COLUMNS_PADDED_WITH_SPACES

Some databases store character strings in CHAR(XX) columns and when read back in have been padded with spaces.

See Also:

Constant Field Values

NULL_EQUALS_EMPTY_STRING

static final String NULL_EQUALS_EMPTY_STRING

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

See Also:

Constant Field Values

STATEMENT_BATCHING

static final String STATEMENT_BATCHING

Whether this datastore supports batching of statements.

See Also:

Constant Field Values

CHECK_IN_CREATE_STATEMENTS

static final String CHECK_IN_CREATE_STATEMENTS

Whether this datastore supports the use of "CHECK" in CREATE TABLE statements (DDL).

See Also:

Constant Field Values

CHECK_IN_END_CREATE_STATEMENTS

static final String CHECK_IN_END_CREATE_STATEMENTS

Whether this datastore supports the use of CHECK after the column definitions in the CREATE TABLE statements (DDL). for example

 CREATE TABLE MYTABLE
 (
     COL_A int,
     COL_B char(1),
     PRIMARY KEY (COL_A),
     CHECK (COL_B IN ('Y','N'))
 )
 

See Also:

Constant Field Values

UNIQUE_IN_END_CREATE_STATEMENTS

static final String UNIQUE_IN_END_CREATE_STATEMENTS

Whether this datastore supports the use of UNIQUE after the column definitions in CREATE TABLE statements (DDL). For example

 CREATE TABLE MYTABLE
 (
     COL_A int,
     COL_B char(1),
     PRIMARY KEY (COL_A),
     UNIQUE (COL_B ...)
 )
 

See Also:

Constant Field Values

FK_IN_END_CREATE_STATEMENTS

static final String FK_IN_END_CREATE_STATEMENTS

Whether this datastore supports the use of FOREIGN KEY after the column definitions in CREATE TABLE statements (DDL). For example

 CREATE TABLE MYTABLE
 (
     COL_A int,
     COL_B char(1),
     FOREIGN KEY (COL_A) REFERENCES TBL2(COL_X)
 )
 

See Also:

Constant Field Values

PRIMARYKEY_IN_CREATE_STATEMENTS

static final String PRIMARYKEY_IN_CREATE_STATEMENTS

Whether the datastore supports specification of the primary key in CREATE TABLE statements.

See Also:

Constant Field Values

GET_GENERATED_KEYS_STATEMENT

static final String GET_GENERATED_KEYS_STATEMENT

Whether the datastore supports "Statement.getGeneratedKeys".

See Also:

Constant Field Values

NULLS_IN_CANDIDATE_KEYS

static final String NULLS_IN_CANDIDATE_KEYS

Whether we support NULLs in candidate keys.

See Also:

Constant Field Values

NULLS_KEYWORD_IN_COLUMN_OPTIONS

static final String NULLS_KEYWORD_IN_COLUMN_OPTIONS

Whether the database support NULLs in the column options for table creation.

See Also:

Constant Field Values

DEFAULT_KEYWORD_IN_COLUMN_OPTIONS

static final String DEFAULT_KEYWORD_IN_COLUMN_OPTIONS

Whether we support DEFAULT tag in CREATE TABLE statements

See Also:

Constant Field Values

DEFAULT_KEYWORD_WITH_NOT_NULL_IN_COLUMN_OPTIONS

static final String DEFAULT_KEYWORD_WITH_NOT_NULL_IN_COLUMN_OPTIONS

Whether we support DEFAULT tag together with NOT NULL in CREATE TABLE statements.

CREATE TABLE X ( MEMORY_SIZE BIGINT DEFAULT 0 NOT NULL )

Some databases only support DEFAULT {ConstantExpression | NULL}

See Also:

Constant Field Values

DEFAULT_BEFORE_NULL_IN_COLUMN_OPTIONS

static final String DEFAULT_BEFORE_NULL_IN_COLUMN_OPTIONS

Whether any DEFAULT tag will be before any NULL/NOT NULL in the column options.

See Also:

Constant Field Values

ANSI_JOIN_SYNTAX

static final String ANSI_JOIN_SYNTAX

Accessor for whether the RDBMS supports ANSI join syntax.

See Also:

Constant Field Values

ANSI_CROSSJOIN_SYNTAX

static final String ANSI_CROSSJOIN_SYNTAX

Accessor for whether the RDBMS supports ANSI cross-join syntax.

See Also:

Constant Field Values

CROSSJOIN_ASINNER11_SYNTAX

static final String CROSSJOIN_ASINNER11_SYNTAX

Accessor for whether the RDBMS supports cross-join as "INNER 1=1" syntax.

See Also:

Constant Field Values

AUTO_INCREMENT_KEYS_NULL_SPECIFICATION

static final String AUTO_INCREMENT_KEYS_NULL_SPECIFICATION

Whether we support auto-increment/identity keys with nullability specification.

See Also:

Constant Field Values

AUTO_INCREMENT_COLUMN_TYPE_SPECIFICATION

static final String AUTO_INCREMENT_COLUMN_TYPE_SPECIFICATION

Whether we support auto-increment/identity keys with column type specification.

See Also:

Constant Field Values

AUTO_INCREMENT_PK_IN_CREATE_TABLE_COLUMN_DEF

static final String AUTO_INCREMENT_PK_IN_CREATE_TABLE_COLUMN_DEF

Whether this adapter requires any specification of primary key in the column definition of CREATE TABLE.

See Also:

Constant Field Values

LOCK_WITH_SELECT_FOR_UPDATE

static final String LOCK_WITH_SELECT_FOR_UPDATE

Whether this datastore supports SELECT ... FOR UPDATE.

See Also:

Constant Field Values

LOCK_OPTION_PLACED_AFTER_FROM

static final String LOCK_OPTION_PLACED_AFTER_FROM

Whether the lock option (when doing SELECT FOR UPDATE) is to be placed after the FROM.

See Also:

Constant Field Values

LOCK_OPTION_PLACED_WITHIN_JOIN

static final String LOCK_OPTION_PLACED_WITHIN_JOIN

Whether the lock option (when doing SELECT FOR UPDATE) is to be placed within the JOIN clause.

See Also:

Constant Field Values

BLOB_SET_USING_SETSTRING

static final String BLOB_SET_USING_SETSTRING

Accessor for whether setting a BLOB value allows use of PreparedStatement.setString()

See Also:

Constant Field Values

CLOB_SET_USING_SETSTRING

static final String CLOB_SET_USING_SETSTRING

Accessor for whether setting a CLOB value allows use of PreparedStatement.setString()

See Also:

Constant Field Values

CREATE_INDEXES_BEFORE_FOREIGN_KEYS

static final String CREATE_INDEXES_BEFORE_FOREIGN_KEYS

Whether to create indexes before foreign keys.

See Also:

Constant Field Values

INCLUDE_ORDERBY_COLS_IN_SELECT

static final String INCLUDE_ORDERBY_COLS_IN_SELECT

Whether to include any ORDER BY columns in a SELECT.

See Also:

Constant Field Values

DATETIME_STORES_MILLISECS

static final String DATETIME_STORES_MILLISECS

Whether DATETIME stores milliseconds.

See Also:

Constant Field Values

ACCESS_PARENTQUERY_IN_SUBQUERY_JOINED

static final String ACCESS_PARENTQUERY_IN_SUBQUERY_JOINED

Whether this database supports joining outer and inner queries using columns. i.e can you refer to a column of the outer query in a subquery when the outer query table is not the primary table of the outer query (i.e joined)

See Also:

Constant Field Values

ORDERBY_USING_SELECT_COLUMN_INDEX

static final String ORDERBY_USING_SELECT_COLUMN_INDEX

In SAPDB any orderby has to be using the index(es) of any SELECT column(s) rather than their name(s).

See Also:

Constant Field Values

STORED_PROCEDURES

static final String STORED_PROCEDURES

Whether this datastore supports stored procedures.

See Also:

Constant Field Values

FK_UPDATE_ACTION_CASCADE

static final String FK_UPDATE_ACTION_CASCADE

See Also:

Constant Field Values

FK_UPDATE_ACTION_DEFAULT

static final String FK_UPDATE_ACTION_DEFAULT

See Also:

Constant Field Values

FK_UPDATE_ACTION_NULL

static final String FK_UPDATE_ACTION_NULL

See Also:

Constant Field Values

FK_UPDATE_ACTION_RESTRICT

static final String FK_UPDATE_ACTION_RESTRICT

See Also:

Constant Field Values

FK_DELETE_ACTION_CASCADE

static final String FK_DELETE_ACTION_CASCADE

See Also:

Constant Field Values

FK_DELETE_ACTION_DEFAULT

static final String FK_DELETE_ACTION_DEFAULT

See Also:

Constant Field Values

FK_DELETE_ACTION_NULL

static final String FK_DELETE_ACTION_NULL

See Also:

Constant Field Values

FK_DELETE_ACTION_RESTRICT

static final String FK_DELETE_ACTION_RESTRICT

See Also:

Constant Field Values

TX_ISOLATION_NONE

static final String TX_ISOLATION_NONE

See Also:

Constant Field Values

TX_ISOLATION_READ_COMMITTED

static final String TX_ISOLATION_READ_COMMITTED

See Also:

Constant Field Values

TX_ISOLATION_READ_UNCOMMITTED

static final String TX_ISOLATION_READ_UNCOMMITTED

See Also:

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TX_ISOLATION_REPEATABLE_READ

static final String TX_ISOLATION_REPEATABLE_READ

See Also:

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TX_ISOLATION_SERIALIZABLE

static final String TX_ISOLATION_SERIALIZABLE

See Also:

Constant Field Values

UPDATE_MULTITABLE

static final String UPDATE_MULTITABLE

Whether this datastore supports multiple table update statements.

See Also:

Constant Field Values

Method Detail

supportsTransactionIsolation

boolean supportsTransactionIsolation(int level)

Accessor for whether this database adapter supports the specified transaction isolation.

Parameters:

level - The isolation level (as defined by Connection enums).

Returns:

Whether it is supported.

getRangeByLimitEndOfStatementClause

String getRangeByLimitEndOfStatementClause(long offset,
                                           long count)

Method to return the SQL to append to the end of the SELECT statement to handle restriction of ranges using the LIMIT keyword. Defaults to an empty string (not supported). SELECT param ... WHERE {LIMIT}

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.

getRangeByRowNumberColumn

String getRangeByRowNumberColumn()

Method to return the column name to use when handling ranges via a rownumber on the select using the original method (DB2). Defaults to an empty string (not supported).

Returns:

The row number column.

getRangeByRowNumberColumn2

String getRangeByRowNumberColumn2()

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).

Returns:

The row number column.

getColumns

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.

Parameters:

conn - Connection to use

catalog - The catalog (null if none)

schema - The schema (null if none)

table - The table (null if all)

columnNamePattern - The column name (null if all)

Returns:

ResultSet containing the table/column information

Throws:

SQLException - Thrown if an error occurs

getInsertStatementForNoColumns

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).

Parameters:

table - The table

Returns:

The statement for the INSERT

getUnlimitedLengthPrecisionValue

int getUnlimitedLengthPrecisionValue(SQLTypeInfo typeInfo)

Returns the precision value to be used when creating string columns of "unlimited" length. Usually, if this value is needed it is provided in the database metadata. However, for some types in some databases the value must be computed.

Parameters:

typeInfo - the typeInfo object for which the precision value is needed.

Returns:

the precision value to be used when creating the column, or -1 if no value should be used.

getAutoIncrementStmt

String getAutoIncrementStmt(Table table,
                            String columnName)

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

Parameters:

table - Table (that the autoincrement is for)

columnName - (that the autoincrement is for)

Returns:

The statement for getting the latest auto-increment/identity key

getAutoIncrementKeyword

String getAutoIncrementKeyword()

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

Returns:

The keyword for a column using auto-increment/identity

getDropTableStatement

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 CASCADE
 

Parameters:

table - The table to drop.

Returns:

The text of the SQL statement.

getDeleteTableStatement

String getDeleteTableStatement(SQLTable tbl)

Method to return the basic SQL for a DELETE TABLE statement. Returns a String like DELETE FROM tbl t1. Doesn't include any where clause.

Parameters:

tbl - The SQLTable to delete

Returns:

The delete table string

getAddCandidateKeyStatement

String getAddCandidateKeyStatement(CandidateKey ck,
                                   org.datanucleus.store.mapped.IdentifierFactory factory)

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

 ALTER TABLE FOO ADD CONSTRAINT FOO_CK UNIQUE (BAZ)
 

Parameters:

ck - An object describing the candidate key.

factory - Identifier factory

Returns:

The text of the SQL statement.

isValidPrimaryKeyType

boolean isValidPrimaryKeyType(int datatype)

Method to return whether the specified JDBC type is valid for use in a PrimaryKey.

Parameters:

datatype - The JDBC type.

Returns:

Whether it is valid for use in the PK

getAddColumnStatement

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

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

Parameters:

table - The table

col - The column

Returns:

The SQL necessary to add the column

getCreateIndexStatement

String getCreateIndexStatement(Index idx,
                               org.datanucleus.store.mapped.IdentifierFactory factory)

Returns the appropriate SQL to add an index to its table. It should return something like:

 CREATE INDEX FOO_N1 ON FOO (BAR,BAZ)
 CREATE UNIQUE INDEX FOO_U1 ON FOO (BAR,BAZ)
 

Parameters:

idx - An object describing the index.

factory - Identifier factory

Returns:

The text of the SQL statement.

getExistingIndexes

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

Provide the existing indexes in the database for the table

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

getCreateTableStatement

String getCreateTableStatement(TableImpl table,
                               Column[] columns,
                               Properties props,
                               org.datanucleus.store.mapped.IdentifierFactory factory)

Returns the appropriate SQL to create the given table having the given columns. No column constraints or key definitions should be included. It should return something like:

 CREATE TABLE FOO (BAR VARCHAR(30), BAZ INTEGER)
 

Parameters:

table - The table to create.

columns - The columns of the table.

props - Properties for controlling the table creation

factory - Identifier factory

Returns:

The text of the SQL statement.

getAddPrimaryKeyStatement

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

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

 ALTER TABLE FOO ADD CONSTRAINT FOO_PK PRIMARY KEY (BAR)
 

Parameters:

pk - An object describing the primary key.

factory - Identifier factory

Returns:

The text of the SQL statement.

getAddForeignKeyStatement

String getAddForeignKeyStatement(ForeignKey fk,
                                 org.datanucleus.store.mapped.IdentifierFactory factory)

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

 ALTER TABLE FOO ADD CONSTRAINT FOO_FK1 FOREIGN KEY (BAR, BAZ) REFERENCES ABC (COL1, COL2)
 

Parameters:

fk - An object describing the foreign key.

factory - Identifier factory

Returns:

The text of the SQL statement.

getDropViewStatement

String getDropViewStatement(ViewImpl view)

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

 DROP VIEW FOO
 

Parameters:

view - The view to drop.

Returns:

The text of the SQL statement.

getSurrogateForEmptyStrings

String getSurrogateForEmptyStrings()

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

Returns:

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

getTransactionIsolationForSchemaCreation

int getTransactionIsolationForSchemaCreation()

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

Returns:

The transaction isolation level for schema generation process

getRequiredTransactionIsolationLevel

int getRequiredTransactionIsolationLevel()

Accessor for the "required" transaction isolation level if it has to be a certain value for this adapter.

Returns:

Transaction isolation level (-1 implies no restriction)

getCatalogName

String getCatalogName(Connection conn)
                      throws SQLException

Accessor for the Catalog Name for this datastore.

Parameters:

conn - Connection to the datastore

Returns:

The catalog name

Throws:

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

getSchemaName

String getSchemaName(Connection conn)
                     throws SQLException

Accessor for the Schema Name for this datastore.

Parameters:

conn - Connection to the datastore

Returns:

The schema name

Throws:

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

getSelectWithLockOption

String getSelectWithLockOption()

The option to specify in "SELECT ... FROM TABLE ... WITH (option)" to lock instances Null if not supported.

Returns:

The option to specify with "SELECT ... FROM TABLE ... WITH (option)"

getSelectNewUUIDStmt

String getSelectNewUUIDStmt()

The function to creates a unique value of type uniqueidentifier.

Returns:

The function. e.g. "SELECT NEWID()"

getSequenceNextStmt

String getSequenceNextStmt(String sequence_name)

Accessor for the sequence statement to get the next id for this datastore.

Parameters:

sequence_name - Name of the sequence

Returns:

The statement for getting the next id for the sequence

getSequenceCreateStmt

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

Accessor for the sequence create statement for this datastore.

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

iteratorReservedWords

Iterator iteratorReservedWords()

Iterator for the reserved words constructed from the method DataBaseMetaData.getSQLKeywords + standard SQL reserved words

Returns:

an Iterator with a set of reserved words

getDatastoreDateStatement

String getDatastoreDateStatement()

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

Returns:

SQL statement to get the datastore date

getCheckConstraintForValues

String getCheckConstraintForValues(org.datanucleus.store.mapped.DatastoreIdentifier identifier,
                                   Object[] values,
                                   boolean nullable)

Creates a CHECK constraint definition based on the given values e.g.

CHECK ("COLUMN" IN ('VAL1','VAL2') OR "COLUMN" IS NULL)

Parameters:

identifier - Column identifier

values - valid values

nullable - whether the datastore identifier is null

Returns:

The check constraint

newSQLTypeInfo

SQLTypeInfo newSQLTypeInfo(ResultSet rs)

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.

Parameters:

rs - ResultSet

Returns:

The SQL type info

newRDBMSColumnInfo

RDBMSColumnInfo newRDBMSColumnInfo(ResultSet rs)

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

Parameters:

rs - Result Set

Returns:

The column info

newFKInfo

ForeignKeyInfo newFKInfo(ResultSet rs)

Method to return ForeignKeyInfo for the current row of the ResultSet which will have been obtained from a call to DatabaseMetaData.getImportedKeys() or DatabaseMetaData.getExportedKeys().

Parameters:

rs - The result set returned from DatabaseMetaData.get??portedKeys()

Returns:

The foreign key info

getOrderString

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.

Parameters:

storeMgr - StoreManager

orderString - The basic ordering string

sqlExpr - The sql expression being represented here

Returns:

The adapted ordering string

validToSelectMappingInStatement

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.

Parameters:

stmt - The statement

m - The mapping that we want to select

Returns:

Whether it is valid

isStatementCancel

boolean isStatementCancel(SQLException sqle)

return whether this exception represents a cancelled statement.

Parameters:

sqle - the exception

Returns:

whether it is a cancel

isStatementTimeout

boolean isStatementTimeout(SQLException sqle)

return whether this exception represents a timed out statement.

Parameters:

sqle - the exception

Returns:

whether it is a timeout