Function SerializeIndexSpec

pg_documentdb/src/metadata/index.c:2594–2785

* Serializes the IndexSpec to a bson compatible response. * For GetIndexes this formats it into a user friendly version. * Otherwise (for Shard_collection etc.) it retains the original format. */

 * Otherwise (for Shard_collection etc.) it retains the original format.
 */
static pgbson *
SerializeIndexSpec(const IndexSpec *indexSpec, bool isGetIndexes,
				   const char *namespaceName)
{
	pgbson_writer finalWriter;
	PgbsonWriterInit(&finalWriter);
	PgbsonWriterAppendInt32(&finalWriter, "v", 1, indexSpec->indexVersion);

	List *textColumns = NIL;
	const char *languageOverride = "language";
	if (isGetIndexes)
	{
		/* For GetIndexes, we may need to rewrite the key if there's non-regular indexes (e.g. text ) */
		textColumns = WriteIndexKeyForGetIndexes(&finalWriter,
												 indexSpec->indexKeyDocument);
	}
	else
	{
		PgbsonWriterAppendDocument(&finalWriter, "key", 3, indexSpec->indexKeyDocument);
	}

	PgbsonWriterAppendUtf8(&finalWriter, "name", 4, indexSpec->indexName);

	if (indexSpec->indexPFEDocument != NULL)
	{
		PgbsonWriterAppendDocument(&finalWriter, "partialFilterExpression", -1,
								   indexSpec->indexPFEDocument);
	}

	if (indexSpec->indexWPDocument != NULL)
	{
		PgbsonWriterAppendDocument(&finalWriter, "wildcardProjection", -1,
								   indexSpec->indexWPDocument);
	}

	if (indexSpec->indexSparse != BoolIndexOption_Undefined)
	{
		PgbsonWriterAppendBool(&finalWriter, "sparse", 6, indexSpec->indexSparse ==
							   BoolIndexOption_True);
	}

	if (indexSpec->indexUnique != BoolIndexOption_Undefined)
	{
		/*
		 * Unique is only tracked for getIndexes if it's explicitly set to true.
		 */
		if (!isGetIndexes || indexSpec->indexUnique == BoolIndexOption_True)
		{
			PgbsonWriterAppendBool(&finalWriter, "unique", 6, indexSpec->indexUnique ==
								   BoolIndexOption_True);
		}
	}

	if (indexSpec->indexExpireAfterSeconds != NULL)
	{
		PgbsonWriterAppendInt32(&finalWriter, "expireAfterSeconds", -1,
								*indexSpec->indexExpireAfterSeconds);
	}