databasemetadata.java

gcc的组建

   *         connections are supported, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsMultipleTransactions() throws SQLException;

  /**
   * This method tests whether or not columns can be defined as NOT NULL.  A
   * fully JDBC compliant driver always returns <code>true</code>.
   *
   * @return <code>true</code> if NOT NULL columns are supported,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsNonNullableColumns() throws SQLException;

  /**
   * This method tests whether or not the minimum grammer for ODBC is supported.
   * A fully JDBC compliant driver will always return <code>true</code>.
   *
   * @return <code>true</code> if the ODBC minimum grammar is supported,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsMinimumSQLGrammar() throws SQLException;

  /**
   * This method tests whether or not the core grammer for ODBC is supported.
   *
   * @return <code>true</code> if the ODBC core grammar is supported,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsCoreSQLGrammar() throws SQLException;

  /**
   * This method tests whether or not the extended grammer for ODBC is supported.
   *
   * @return <code>true</code> if the ODBC extended grammar is supported,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsExtendedSQLGrammar() throws SQLException;

  /**
   * This method tests whether or not the ANSI92 entry level SQL
   * grammar is supported.  A fully JDBC compliant drivers must return
   * <code>true</code>.
   *
   * @return <code>true</code> if the ANSI92 entry level SQL grammar is
   *         supported, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsANSI92EntryLevelSQL() throws SQLException;

  /**
   * This method tests whether or not the ANSI92 intermediate SQL
   * grammar is supported.  
   *
   * @return <code>true</code> if the ANSI92 intermediate SQL grammar is
   *         supported, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsANSI92IntermediateSQL() throws SQLException;

  /**
   * This method tests whether or not the ANSI92 full SQL
   * grammar is supported.  
   *
   * @return <code>true</code> if the ANSI92 full SQL grammar is
   *         supported, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsANSI92FullSQL() throws SQLException;

  /**
   * This method tests whether or not the SQL integrity enhancement
   * facility is supported.
   *
   * @return <code>true</code> if the integrity enhancement facility is
   *         supported, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsIntegrityEnhancementFacility() throws SQLException;

  /**
   * This method tests whether or not the database supports outer joins.
   *
   * @return <code>true</code> if outer joins are supported, <code>false</code>
   *         otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsOuterJoins() throws SQLException;

  /**
   * This method tests whether or not the database supports full outer joins.
   *
   * @return <code>true</code> if full outer joins are supported, 
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsFullOuterJoins() throws SQLException;

  /**
   * This method tests whether or not the database supports limited outer joins.
   *
   * @return <code>true</code> if limited outer joins are supported, 
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsLimitedOuterJoins() throws SQLException;

  /**
   * This method returns the vendor's term for "schema".
   *
   * @return The vendor's term for schema.
   * @exception SQLException if an error occurs.
   */
  String getSchemaTerm() throws SQLException;

  /**
   * This method returns the vendor's term for "procedure".
   *
   * @return The vendor's term for procedure.
   * @exception SQLException if an error occurs.
   */
  String getProcedureTerm() throws SQLException;

  /**
   * This method returns the vendor's term for "catalog".
   *
   * @return The vendor's term for catalog.
   * @exception SQLException if an error occurs.
   */
  String getCatalogTerm() throws SQLException;

  /**
   * This method tests whether a catalog name appears at the beginning of
   * a fully qualified table name.
   *
   * @return <code>true</code> if the catalog name appears at the beginning,
   *         <code>false</code> if it appears at the end.
   * @exception SQLException If an error occurs.
   */
  boolean isCatalogAtStart() throws SQLException;

  /**
   * This method returns the separator between the catalog name and the
   * table name.
   *
   * @return The separator between the catalog name and the table name.
   * @exception SQLException If an error occurs.
   */
  String getCatalogSeparator() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in a data
   * manipulation statement.
   *
   * @return <code>true</code> if a catalog name can appear in a data
   *         manipulation statement, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSchemasInDataManipulation() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in a procedure
   * call
   *
   * @return <code>true</code> if a catalog name can appear in a procedure
   *         call, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSchemasInProcedureCalls() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in a table definition.
   *
   * @return <code>true</code> if a catalog name can appear in a table
   *         definition, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSchemasInTableDefinitions() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in an index definition.
   *
   * @return <code>true</code> if a catalog name can appear in an index
   *         definition, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSchemasInIndexDefinitions() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in privilege definitions.
   *
   * @return <code>true</code> if a catalog name can appear in privilege
   *         definition, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSchemasInPrivilegeDefinitions() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in a data
   * manipulation statement.
   *
   * @return <code>true</code> if a catalog name can appear in a data
   *         manipulation statement, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsCatalogsInDataManipulation() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in a procedure
   * call
   *
   * @return <code>true</code> if a catalog name can appear in a procedure
   *         call, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsCatalogsInProcedureCalls() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in a table definition.
   *
   * @return <code>true</code> if a catalog name can appear in a table
   *         definition, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsCatalogsInTableDefinitions() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in an index definition.
   *
   * @return <code>true</code> if a catalog name can appear in an index
   *         definition, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsCatalogsInIndexDefinitions() throws SQLException;

  /**
   * This method tests whether a catalog name can appear in privilege definitions.
   *
   * @return <code>true</code> if a catalog name can appear in privilege
   *         definition, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsCatalogsInPrivilegeDefinitions() throws SQLException;

  /**
   * This method tests whether or not that database supports positioned
   * deletes.
   *
   * @return <code>true</code> if positioned deletes are supported,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsPositionedDelete() throws SQLException;

  /**
   * This method tests whether or not that database supports positioned
   * updates.
   *
   * @return <code>true</code> if positioned updates are supported,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsPositionedUpdate() throws SQLException;

  /**
   * This method tests whether or not SELECT FOR UPDATE is supported by the
   * database.
   *
   * @return <code>true</code> if SELECT FOR UPDATE is supported 
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSelectForUpdate() throws SQLException;

  /**
   * This method tests whether or not stored procedures are supported on
   * this database.
   *
   * @return <code>true</code> if stored procedures are supported,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsStoredProcedures() throws SQLException;

  /**
   * This method tests whether or not subqueries are allowed in comparisons.
   * A fully JDBC compliant driver will always return <code>true</code>.
   *
   * @return <code>true</code> if subqueries are allowed in comparisons,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSubqueriesInComparisons() throws SQLException;

  /**
   * This method tests whether or not subqueries are allowed in exists
   * expressions.  A fully JDBC compliant driver will always return
   * <code>true</code>.
   *
   * @return <code>true</code> if subqueries are allowed in exists 
   *         expressions, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSubqueriesInExists() throws SQLException;

  /**
   * This method tests whether subqueries are allowed in IN statements.
   * A fully JDBC compliant driver will always return <code>true</code>.
   *
   * @return <code>true</code> if the driver supports subqueries in IN
   *         statements, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSubqueriesInIns() throws SQLException;

  /**
   * This method tests whether or not subqueries are allowed in quantified
   * expressions.  A fully JDBC compliant driver will always return
   * <code>true</code>.
   *
   * @return <code>true</code> if subqueries are allowed in quantified 
   *         expressions, <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsSubqueriesInQuantifieds() throws SQLException;

  /**
   * This method test whether or not correlated subqueries are allowed. A
   * fully JDBC compliant driver will always return <code>true</code>.
   *
   * @return <code>true</code> if correlated subqueries are allowed,
   *         <code>false</code> otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsCorrelatedSubqueries() throws SQLException;

  /**
   * This method tests whether or not the UNION statement is supported.
   *
   * @return <code>true</code> if UNION is supported, <code>false</code>
   *         otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsUnion() throws SQLException;

  /**
   * This method tests whether or not the UNION ALL statement is supported.
   *
   * @return <code>true</code> if UNION ALL is supported, <code>false</code>
   *         otherwise.
   * @exception SQLException If an error occurs.
   */
  boolean supportsUnionAll() throws SQLException;

  /**
   * This method tests whether or not the database supports cursors
   * remaining open across commits.
   *
   * @return <code>true</code> if cursors can remain open across commits,