docs: public void loadSchemaInformation(final String schemaName) {
          columnInfoMap.clear();
  
          // get schema information and map it to columnInfo
          final List<DefaultColumnInfo> columnInfoList = dao.getColumnInfoList(schemaName);
          for (final DefaultColumnInfo columnInfo : columnInfoList) {
              final String tableName = columnInfo.getTableName();
  
              if (!columnInfoMap.containsKey(tableName)) {
                  columnInfoMap.put(tableName, new HashMap<String, DefaultColumnInfo>());
              }
  
              columnInfoMap.get(tableName).put(columnInfo.getColumnName(), columnInfo);
          }
      }