code: func getGlobalFieldMappings() []*types.EventFieldMapping {
  	return []*types.EventFieldMapping{
  		{
  			ColumnName: types.SQLColumnLabelHeight,
  			Field:      types.BlockHeightLabel,
  			Type:       types.EventFieldTypeString,
  		},
  		{
  			ColumnName: types.SQLColumnLabelTxHash,
  			Field:      types.TxTxHashLabel,
  			Type:       types.EventFieldTypeString,
  		},
  		{
  			ColumnName: types.SQLColumnLabelEventType,
  			Field:      types.EventTypeLabel,
  			Type:       types.EventFieldTypeString,
  		},
  		{
  			ColumnName: types.SQLColumnLabelEventName,
  			Field:      types.EventNameLabel,
  			Type:       types.EventFieldTypeString,
  		},
  	}
  }
docs: // getGlobalColumns returns global columns for event table structures,
  // these columns will be part of every SQL event table to relate data with source events