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

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

   *
   * @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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            return returnValue;
        } catch (StandardException se) {
            // Catch illegal null insert and add column info
            if (se.getMessageId().startsWith(SQLState.LANG_NULL_INTO_NON_NULL))
            {
                ResultColumnDescriptor columnDescriptor = desc.getColumnDescriptor( sourceColumnPosition );
                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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        DataTypeDescriptor[]    result = new DataTypeDescriptor[ count ];
        
        for ( int i = 1; i <= count; i++)
        {
            ResultColumnDescriptor  colDesc = desc.getColumnDescriptor(  i );
            DataTypeDescriptor dtd = colDesc.getType();


            result[i - 1] = dtd;
        }


        return result;

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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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   * @exception SQLException thrown on failure
     *
     */
  public final boolean isAutoIncrement(int column) throws SQLException  {
        validColumnNumber(column);
    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 final 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 final 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 final 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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     *
     * @return table name or "" if not applicable
   * @exception SQLException thrown on failure
     */
  public final String getTableName(int column) throws SQLException {
    ResultColumnDescriptor cd = columnInfo[column - 1];
    String s = cd.getSourceTableName();


    // database returns null when no table name to differentiate from empty name
    return (s==null? "" : s);
  }

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  private DataTypeDescriptor getColumnTypeDescriptor(int column) throws SQLException 
  {
    validColumnNumber(column);


    ResultColumnDescriptor cd = columnInfo[column - 1];


    return cd.getType();
  }

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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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