jdbcdatabasemetadata.java

一个用java写的开源的数据库系统

     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsANSI92EntryLevelSQL() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves whether this database supports the ANSI92 intermediate SQL
     * grammar supported. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * up to and including 1.7.1, HSQLDB does not support the ANSI92
     * intermediate SQL grammar; this method always returns
     * <code>false</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsANSI92IntermediateSQL() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves whether this database supports the ANSI92 full SQL
     * grammar supported. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * up to and including 1.7.1, HSQLDB does not support the ANSI92
     * full SQL grammar; this method always returns
     * <code>false</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsANSI92FullSQL() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves whether this database supports the SQL Integrity
     * Enhancement Facility. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * up to and including 1.7.1, HSQLDB does not support the SQL
     * Integrity Enhancement Facility; this method always returns
     * <code>false</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsIntegrityEnhancementFacility()
    throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves whether this database supports some form of outer join. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * HSQLDB supports outer joins; this method always returns
     * <code>true</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsOuterJoins() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return true;
    }

    /**
     * Retrieves whether this database supports full nested outer joins. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB  does not support full nested outer
     * joins; this method always returns <code>false</code>. <p>
     *
     * This behaviour may change in a future release.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsFullOuterJoins() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves whether this database provides limited support for outer
     * joins.  (This will be <code>true</code> if the method
     * <code>supportsFullOuterJoins</code> returns <code>true</code>). <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB support the LEFT OUTER join syntax;
     * this method always returns <code>true</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsLimitedOuterJoins() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return true;
    }

    /**
     * Retrieves the database vendor's preferred term for "schema". <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support schemas;
     * this method always returns the empty String.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return the vendor term for "schema"
     * @exception SQLException if a database access error occurs
     */
    public String getSchemaTerm() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return "";
    }

    /**
     * Retrieves the database vendor's preferred term for "procedure". <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support declaration of
     * procedures in SQL; this method always returns the empty String.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return the vendor term for "procedure"
     * @exception SQLException if a database access error occurs
     */
    public String getProcedureTerm() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return "";
    }

    /**
     * Retrieves the database vendor's preferred term for "catalog". <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support catalogs;
     * this method always returns the empty String.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return the vendor term for "catalog"
     * @exception SQLException if a database access error occurs
     */
    public String getCatalogTerm() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return "";
    }

    /**
     * Retrieves whether a catalog appears at the start of a fully qualified
     * table name.  If not, the catalog appears at the end. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support catalogs;
     * this method always returns <code>false</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if the catalog name appears at the beginning
     *        of a fully qualified table name; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean isCatalogAtStart() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves the <code>String</code> that this database uses as the
     * separator between a catalog and table name. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support catalogs;
     * this method always returns the empty String.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return the separator string
     * @exception SQLException if a database access error occurs
     */
    public String getCatalogSeparator() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return "";
    }

    /**
     * Retrieves whether a schema name can be used in a data
     * manipulation statement. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support schemas;
     * this method always returns <code>false</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsSchemasInDataManipulation() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves whether a schema name can be used in a procedure call
     * statement. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support schemas;
     * this method always returns <code>false</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsSchemasInProcedureCalls() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves whether a schema name can be used in a table
     * definition statement. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support schemas;
     * this method always returns <code>false</code>.
     * </span>
     * <!-- end release-specific documentation -->
     *
     *
     * @return <code>true</code> if so; <code>false</code> otherwise
     * @exception SQLException if a database access error occurs
     */
    public boolean supportsSchemasInTableDefinitions() throws SQLException {

        if (Trace.TRACE) {
            Trace.trace();
        }

        return false;
    }

    /**
     * Retrieves whether a schema name can be used in an index
     * definition statement. <p>
     *
     * <!-- start release-specific documentation -->
     * <span class="ReleaseSpecificDocumentation">
     * <b>HSQLDB-Specific Information:</b> <p>
     *
     * Up to and including 1.7.1, HSQLDB does not support schemas