code: func buildBitAnd(aggFuncDesc *aggregation.AggFuncDesc, ordinal int) AggFunc {
  	base := baseAggFunc{
  		args:    aggFuncDesc.Args,
  		ordinal: ordinal,
  	}
  	return &bitAndUint64{baseBitAggFunc{base}}
  }
docs: // buildBitAnd builds the AggFunc implementation for function "BIT_AND".