Function _buildCols

be/src/catalog/workload-management-init.cc:156–187

Loops through all workload management columns definied in FIELD_DEFINITIONS and builds a TColumn object for each column if the provided function returns true for that column returning a vector of all columns that were included.

/// a TColumn object for each column if the provided function returns true for that column
/// returning a vector of all columns that were included.
static vector<TColumn> _buildCols(
    const function<bool(const FieldDefinition& item)>& shouldIncludeCol) {
  vector<TColumn> cols;

  for (const auto& field : FIELD_DEFINITIONS) {
    if (shouldIncludeCol(field.second)) {
      TScalarType t_scalar_type;
      TTypeNode t_type_node;
      TColumnType t_col_type;
      TColumn t_col;

      t_scalar_type.__set_type(field.second.db_column_type);
      t_scalar_type.__set_precision(field.second.precision);
      t_scalar_type.__set_scale(field.second.scale);

      t_type_node.__set_type(TTypeNodeType::SCALAR);
      t_type_node.__set_scalar_type(t_scalar_type);

      t_col_type.__set_types({t_type_node});

      t_col.__set_columnName(to_lower_copy(to_string(field.first)));
      t_col.__set_columnType(t_col_type);
      t_col.__set_is_nullable(true);

      cols.push_back(t_col);
    }
  }

  DCHECK(cols.size() > 0);

  return cols;
} // function _buildCols

/// Sets up the query table by generating and executing the necessary DML statements.
/// System tables are external. The columns on the table will be all columns with a