Function ResultSet_MapProjection

src/resultset/resultset.c:99–117

map each column to a record index such that when resolving resultset row i column j we'll extract data from record at position columns_record_map[j]

// such that when resolving resultset row i column j we'll extract
// data from record at position columns_record_map[j]
void ResultSet_MapProjection
(
	ResultSet *set,  // resultset to init mappings for
	rax *mapping     // mapping
) {
	ASSERT(set     != NULL);
	ASSERT(mapping != NULL);

	if(set->columns_record_map == NULL) {
		set->columns_record_map = rm_malloc(sizeof(uint) * set->column_count);
	}

	for(uint i = 0; i < set->column_count; i++) {
		const char *column = set->columns[i];
		void *idx = raxFind(mapping, (unsigned char *)column, strlen(column));
		ASSERT(idx != raxNotFound);
		set->columns_record_map[i] = (intptr_t)idx;
	}
}

// returns number of rows in result-set
uint64_t ResultSet_RowCount