Function svec_concat

gpcontrib/gp_sparse_vector/operators.c:78–124

Datum svec_concat(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1( svec_concat );
Datum
svec_concat(PG_FUNCTION_ARGS)
{
	if (PG_ARGISNULL(0) && (!PG_ARGISNULL(1)))
	{
		PG_RETURN_SVECTYPE_P(PG_GETARG_SVECTYPE_P(1));
	} else if (PG_ARGISNULL(0) && PG_ARGISNULL(1))
	{
		PG_RETURN_NULL();
	} else if (PG_ARGISNULL(1))
	{
		PG_RETURN_SVECTYPE_P(PG_GETARG_SVECTYPE_P(0));
	} else
	{

		SvecType *svec1 = PG_GETARG_SVECTYPE_P(0);
		SvecType *svec2 = PG_GETARG_SVECTYPE_P(1);
		SparseData left  = sdata_from_svec(svec1);
		SparseData right = sdata_from_svec(svec2);
		SparseData sdata = makeEmptySparseData();
		char *vals,*index;
		int l_val_len = left->vals->len;
		int r_val_len = right->vals->len;
		int l_ind_len = left->index->len;
		int r_ind_len = right->index->len;
		int val_len=l_val_len+r_val_len;
		int ind_len=l_ind_len+r_ind_len;

		vals = (char *)palloc(sizeof(char)*val_len);
		index = (char *)palloc(sizeof(char)*ind_len);

		memcpy(vals          ,left->vals->data,l_val_len);
		memcpy(vals+l_val_len,right->vals->data,r_val_len);
		memcpy(index,          left->index->data,l_ind_len);
		memcpy(index+l_ind_len,right->index->data,r_ind_len);

		sdata->vals  = makeStringInfoFromData(vals,val_len);
		sdata->index = makeStringInfoFromData(index,ind_len);
		sdata->type_of_data = left->type_of_data;
		sdata->unique_value_count = left->unique_value_count+
			right->unique_value_count;
		sdata->total_value_count  = left->total_value_count+
			right->total_value_count;

		PG_RETURN_SVECTYPE_P(svec_from_sparsedata(sdata,true));
	}
}


Datum svec_eq(PG_FUNCTION_ARGS);