Method make

src/dsql/AggNodes.cpp:511–557

}

void AvgAggNode::make(DsqlCompilerScratch* dsqlScratch, dsc* desc)
{
	DsqlDescMaker::fromNode(dsqlScratch, desc, arg, true);

	if (desc->isNull())
		return;

	if (DTYPE_IS_DECFLOAT(desc->dsc_dtype))
		return;

	if (dialect1)
	{
		if (!DTYPE_IS_NUMERIC(desc->dsc_dtype) && !DTYPE_IS_TEXT(desc->dsc_dtype))
		{
			ERRD_post(Arg::Gds(isc_expression_eval_err) <<
					  Arg::Gds(isc_dsql_agg_wrongarg) << Arg::Str("AVG"));
		}
		else if (DTYPE_IS_TEXT(desc->dsc_dtype))
		{
			desc->dsc_dtype = dtype_double;
			desc->dsc_length = sizeof(double);
		}
	}
	else
	{
		if (!DTYPE_IS_NUMERIC(desc->dsc_dtype))
		{
			ERRD_post(Arg::Gds(isc_expression_eval_err) <<
					  Arg::Gds(isc_dsql_agg2_wrongarg) << Arg::Str("AVG"));
		}
		else if (desc->dsc_dtype == dtype_int128)
		{
			desc->dsc_dtype = dtype_int128;
			desc->dsc_length = sizeof(Int128);
		}
		else if (DTYPE_IS_EXACT(desc->dsc_dtype))
		{
			desc->dsc_dtype = dtype_int64;
			desc->dsc_length = sizeof(SINT64);
		}
		else
		{
			desc->dsc_dtype = dtype_double;
			desc->dsc_length = sizeof(double);
		}
	}
}

void AvgAggNode::getDesc(thread_db* tdbb, CompilerScratch* csb, dsc* desc)
{