Function CompareBsonValue

pg_documentdb_core/src/query/bson_compare.c:1037–1258

* Compares two bson values. * Please DO NOT expose this method beyond this file. * CODESYNC: This needs to match the behavior of HashBsonValueCompare in bson_hash.c */

 * CODESYNC: This needs to match the behavior of HashBsonValueCompare in bson_hash.c
 */
static int
CompareBsonValue(const bson_value_t *left, const bson_value_t *right,
				 bool *isComparisonValid, const char *collationString)
{
	*isComparisonValid = true;
	if (CompareBsonSortOrderType(left, right) != 0)
	{
		ereport(ERROR, errmsg("left & right sort data types must match"));
	}

	/* same type, same path. now compare value. */
	switch (left->value_type)
	{
		case BSON_TYPE_EOD:
		case BSON_TYPE_MINKEY:
		case BSON_TYPE_UNDEFINED:
		case BSON_TYPE_NULL:
		case BSON_TYPE_MAXKEY:
		{
			return 0;
		}

		case BSON_TYPE_DOUBLE:
		case BSON_TYPE_INT32:
		case BSON_TYPE_INT64:
		case BSON_TYPE_DECIMAL128:
		case BSON_TYPE_BOOL:
		{
			return CompareNumbers(left, right, isComparisonValid);
		}

		case BSON_TYPE_UTF8:
		{
			return CompareStrings(
				left->value.v_utf8.str,
				left->value.v_utf8.len,
				right->value.v_utf8.str,
				right->value.v_utf8.len, collationString);
		}

		case BSON_TYPE_SYMBOL:
		{
			return CompareStrings(
				left->value.v_symbol.symbol,
				left->value.v_symbol.len,
				right->value.v_symbol.symbol,
				right->value.v_symbol.len, collationString);
		}

		case BSON_TYPE_DOCUMENT:
		case BSON_TYPE_ARRAY:
		{
			bson_iter_t leftInnerIt, rightInnerIt;
			if (!bson_iter_init_from_data(
					&leftInnerIt,
					left->value.v_doc.data,
					left->value.v_doc.data_len))
			{