Examples of org.apache.derby.iapi.sql.ResultColumnDescriptor

org.apache.derby.iapi.sql.ResultColumnDescriptor
A ResultColumnDescriptor describes a result column in a ResultSet.

        new NumberDataValue[rla.length];
      for (int i = 0; i < resultDescription.getColumnCount(); i++)
      {
        if (rla[i] == null)
          continue;
        ResultColumnDescriptor rcd = 
          resultDescription.getColumnDescriptor(i + 1);
        aiCache[i] = (NumberDataValue)rcd.getType().getNull();
      }
    }


    if (insertMode != null)
    {

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   *
   * @return  A ResultDescription for this ResultSetNode.
   */
  public ResultColumnDescriptor[] makeResultDescriptors()
  {
      ResultColumnDescriptor colDescs[] = new ResultColumnDescriptor[size()];
    int size = size();


    for (int index = 0; index < size; index++)
    {
        // the ResultColumn nodes are descriptors, so take 'em...

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                  normalizedRow.getColumn(whichCol));
          } catch (StandardException se) {
            // Catch illegal null insert and add column info
            if (se.getMessageId().startsWith(SQLState.LANG_NULL_INTO_NON_NULL))
            {
              ResultColumnDescriptor columnDescriptor =
                resultDescription.getColumnDescriptor(whichCol);
              throw
                StandardException.newException(SQLState.LANG_NULL_INTO_NON_NULL, 
                                 columnDescriptor.getName());
            }
            //just rethrow if not LANG_NULL_INTO_NON_NULL
            throw se;
          }

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        // first count the number of generated columns
        for ( int i = 1; i <= columnCount; i++ )
        {
            if ( i < firstColumn ) { continue; }
            
            ResultColumnDescriptor  rcd = resultDescription.getColumnDescriptor( i );


            if ( rcd.hasGenerationClause() ) { generatedColumnCount++; }
        }


        // now allocate and populate support structures
        generatedColumnPositions = new int[ generatedColumnCount ];
        normalizedGeneratedValues = new DataValueDescriptor[ generatedColumnCount ];


        int     idx = 0;
        for ( int i = 1; i <= columnCount; i++ )
        {
            if ( i < firstColumn ) { continue; }
            
            ResultColumnDescriptor  rcd = resultDescription.getColumnDescriptor( i );


            if ( rcd.hasGenerationClause() )
            {
                generatedColumnPositions[ idx ] = i;
                normalizedGeneratedValues[ idx ] = emptyRow.getColumn( i );


                idx++;

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   *
   * @return  A ResultDescription for this ResultSetNode.
   */
  public ResultColumnDescriptor[] makeResultDescriptors()
  {
      ResultColumnDescriptor colDescs[] = new ResultColumnDescriptor[size()];
    int size = size();


    for (int index = 0; index < size; index++)
    {
        // the ResultColumn nodes are descriptors, so take 'em...

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                  normalizedRow.getColumn(whichCol));
          } catch (StandardException se) {
            // Catch illegal null insert and add column info
            if (se.getMessageId().startsWith(SQLState.LANG_NULL_INTO_NON_NULL))
            {
              ResultColumnDescriptor columnDescriptor =
                resultDescription.getColumnDescriptor(whichCol);
              throw
                StandardException.newException(SQLState.LANG_NULL_INTO_NON_NULL, 
                                 columnDescriptor.getName());
            }
            //just rethrow if not LANG_NULL_INTO_NON_NULL
            throw se;
          }

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   * @exception SQLException thrown on failure
     *
     */
  public boolean isAutoIncrement(int column) throws SQLException  {


    ResultColumnDescriptor rcd = columnInfo[column - 1];
    return rcd.isAutoincrement();
  }

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     * @param column the first column is 1, the second is 2, ...
     * @return true if so
   * @exception SQLException thrown on failure
     */
  public String getColumnLabel(int column) throws SQLException {
    ResultColumnDescriptor cd = columnInfo[column - 1];
    String s = cd.getName();


    // we could get fancier than this, but it's simple
      return (s==null? "Column"+Integer.toString(column) : s);
  }

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     * @param column the first column is 1, the second is 2, ...
     * @return column name
   * @exception SQLException thrown on failure
     */
  public String getColumnName(int column) throws SQLException  {
    ResultColumnDescriptor cd = columnInfo[column - 1];
    String s = cd.getName();
    // database returns null when no column name to differentiate from empty name
      return (s==null? "" : s);


  }

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     * @param column the first column is 1, the second is 2, ...
     * @return schema name or "" if not applicable
   * @exception SQLException thrown on failure
     */
  public String getSchemaName(int column) throws SQLException  {
    ResultColumnDescriptor cd = columnInfo[column - 1];


    String s = cd.getSourceSchemaName();
    // database returns null when no schema name to differentiate from empty name
    return (s==null? "" : s);
  }

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Related Classes of org.apache.derby.iapi.sql.ResultColumnDescriptor

org.apache.derby.impl.jdbc.EmbedResultSetMetaData

org.apache.derby.impl.sql.compile.ResultColumnList

org.apache.derby.impl.sql.execute.DMLWriteResultSet

org.apache.derby.impl.sql.execute.InsertResultSet

org.apache.derby.impl.sql.execute.NormalizeResultSet

org.apache.derby.impl.sql.execute.NoRowsResultSetImpl

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