Function DatumGetIndexSpec

pg_documentdb/src/metadata/index.c:1129–1189

* DatumGetIndexSpec converts given Datum of type index_spec_type into an * IndexSpec object. */

 * IndexSpec object.
 */
IndexSpec *
DatumGetIndexSpec(Datum indexSpecDatum)
{
	IndexSpec *indexSpec = palloc0(sizeof(IndexSpec));

	ExpandedRecordHeader *header = DatumGetExpandedRecord(indexSpecDatum);

	bool isNull = false;
	Datum datum = 0;

	datum = expanded_record_fetch_field(header, 1, &isNull);
	Assert(!isNull);
	indexSpec->indexName = TextDatumGetCString(datum);

	datum = expanded_record_fetch_field(header, 2, &isNull);
	Assert(!isNull);
	indexSpec->indexKeyDocument = DatumGetPgBson(datum);

	datum = expanded_record_fetch_field(header, 3, &isNull);
	indexSpec->indexPFEDocument = isNull ? NULL : DatumGetPgBson(datum);

	datum = expanded_record_fetch_field(header, 4, &isNull);
	indexSpec->indexWPDocument = isNull ? NULL : DatumGetPgBson(datum);

	datum = expanded_record_fetch_field(header, 5, &isNull);
	indexSpec->indexSparse = BoolDatumGetBoolIndexOption(isNull, datum);

	datum = expanded_record_fetch_field(header, 6, &isNull);
	indexSpec->indexUnique = BoolDatumGetBoolIndexOption(isNull, datum);

	datum = expanded_record_fetch_field(header, 7, &isNull);
	Assert(!isNull);
	indexSpec->indexVersion = DatumGetInt32(datum);

	datum = expanded_record_fetch_field(header, 8, &isNull);
	if (!isNull)
	{
		indexSpec->indexExpireAfterSeconds = palloc0(sizeof(int));
		*indexSpec->indexExpireAfterSeconds = DatumGetInt32(datum);
	}

	datum = expanded_record_fetch_field(header, 9, &isNull);
	indexSpec->cosmosSearchOptions = NULL;
	if (!isNull)
	{
		indexSpec->cosmosSearchOptions = DatumGetPgBson(datum);
	}

	/* For the case where new binary is in, but Upgrade hasn't run */
	indexSpec->indexOptions = NULL;
	if (header->nfields > 9)
	{
		datum = expanded_record_fetch_field(header, 10, &isNull);
		if (!isNull)
		{
			indexSpec->indexOptions = DatumGetPgBson(datum);
		}
	}