code: public List<FunctionColumn> getFunctionColumns(final String catalog, final String schemaPattern,
                                                     final String functionNamePattern, final String columnNamePattern)
              throws SQLException {
          final List<FunctionColumn> list = new ArrayList<>();
          try (ResultSet results = databaseMetadata.getFunctionColumns(
                  catalog, schemaPattern, functionNamePattern, columnNamePattern)) {
              if (results != null) {
                  bind(results, FunctionColumn.class, list);
              }
          }
          return list;
      }
docs: Invokes {@link DatabaseMetaData#getFunctionColumns(java.lang.String, java.lang.String, java.lang.String,
  java.lang.String)} with given arguments and returns bound information.
  
  @param catalog             the value for {@code catalog} parameter
  @param schemaPattern       the value for {@code schemaPattern} parameter
  @param functionNamePattern the value for {@code functionNamePattern} parameter
  @param columnNamePattern   the value for {@code columnNamePattern} parameter
  @return a list of function columns
  @throws SQLException if a database error occurs.