jdbcdatabasemetadata.java

一个可以在applet窗体上持行sql语句并显示返回结果的程序

   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsCatalogsInDataManipulation() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Can a catalog name be used in a procedure call statement?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsCatalogsInProcedureCalls() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Can a catalog name be used in a table definition statement?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsCatalogsInTableDefinitions() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Can a catalog name be used in an index definition statement?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsCatalogsInIndexDefinitions() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Can a catalog name be used in a privilege definition statement?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsCatalogsInPrivilegeDefinitions() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Is positioned DELETE supported?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsPositionedDelete() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Is positioned UPDATE supported?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsPositionedUpdate() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Is SELECT for UPDATE supported?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsSelectForUpdate() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Are stored procedure calls using the stored procedure escape
   * syntax supported?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsStoredProcedures() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * Are subqueries in comparison expressions supported?
   *
   * A JDBC Compliant<sup><font size=-2>TM</font></sup> driver
   * always returns true.
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsSubqueriesInComparisons() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * Are subqueries in 'exists' expressions supported?
   *
   * A JDBC Compliant<sup><font size=-2>TM</font></sup> driver
   * always returns true.
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsSubqueriesInExists() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * Are subqueries in 'in' statements supported?
   *
   * A JDBC Compliant<sup><font size=-2>TM</font></sup> driver
   * always returns true.
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsSubqueriesInIns() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * Are subqueries in quantified expressions supported?
   *
   * A JDBC Compliant<sup><font size=-2>TM</font></sup> driver
   * always returns true.
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsSubqueriesInQuantifieds() {
    if(Trace.TRACE) Trace.trace();
    // todo: check if this is correct
    return true;
  }
  /**
   * Are correlated subqueries supported?
   *
   * A JDBC Compliant<sup><font size=-2>TM</font></sup> driver
   * always returns true.
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsCorrelatedSubqueries() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * Is SQL UNION supported?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsUnion() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * Is SQL UNION ALL supported?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean supportsUnionAll() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * Can cursors remain open across commits?
   *
   * @return <code>true</code> if cursors always remain open;
   *       <code>false</code> if they might not remain open
   */
  public boolean supportsOpenCursorsAcrossCommit() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Can cursors remain open across rollbacks?
   *
   * @return <code>true</code> if cursors always remain open;
   *       <code>false</code> if they might not remain open
   */
  public boolean supportsOpenCursorsAcrossRollback() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * Can statements remain open across commits?
   *
   * @return <code>true</code> if statements always remain open;
	 *       <code>false</code> if they might not remain open
   */
  public boolean supportsOpenStatementsAcrossCommit() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * Can statements remain open across rollbacks?
   *
   * @return <code>true</code> if statements always remain open;
	 *       <code>false</code> if they might not remain open
   */
  public boolean supportsOpenStatementsAcrossRollback() {
    if(Trace.TRACE) Trace.trace();
    return true;
  }
  /**
   * How many hex characters can you have in an inline binary literal?
   *
   * @return max binary literal length in hex characters;
   *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxBinaryLiteralLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the max length for a character literal?
   *
   * @return max literal length;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxCharLiteralLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the limit on column name length?
   *
   * @return max column name length;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxColumnNameLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum number of columns in a "GROUP BY" clause?
   *
   * @return max number of columns;
   *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxColumnsInGroupBy() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum number of columns allowed in an index?
   *
   * @return max number of columns;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxColumnsInIndex() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum number of columns in an "ORDER BY" clause?
   *
   * @return max number of columns;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxColumnsInOrderBy() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum number of columns in a "SELECT" list?
   *
   * @return max number of columns;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxColumnsInSelect() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum number of columns in a table?
   *
   * @return max number of columns;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxColumnsInTable() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * How many active connections can we have at a time to this database?
   *
   * @return max number of active connections;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxConnections() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum cursor name length?
   *
   * @return max cursor name length in bytes;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxCursorNameLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum length of an index (in bytes)?
   *
   * @return max index length in bytes;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxIndexLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum length allowed for a schema name?
   *
   * @return max name length in bytes;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxSchemaNameLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum length of a procedure name?
   *
   * @return max name length in bytes;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxProcedureNameLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum length of a catalog name?
   *
   * @return max name length in bytes;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxCatalogNameLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * What's the maximum length of a single row?
   *
   * @return max row size in bytes;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxRowSize() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * Did getMaxRowSize() include LONGVARCHAR and LONGVARBINARY
   * blobs?
   *
   * @return <code>true</code> if so; <code>false</code> otherwise
   */
  public boolean doesMaxRowSizeIncludeBlobs() {
    if(Trace.TRACE) Trace.trace();
    return false;
  }
  /**
   * What's the maximum length of a SQL statement?
   *
   * @return max length in bytes;
	 *      a result of zero means that there is no limit or the limit is not known
   */
  public int getMaxStatementLength() {
    if(Trace.TRACE) Trace.trace();
    return 0;
  }
  /**
   * How many active statements can we have open at one time to this
   * database?
   *
   * @return the maximum number of statements that can be open at one time;