Function CollectionIdsGetIndexCount

pg_documentdb/src/metadata/index.c:848–876

* CollectionIdsGetIndexCount returns number of valid indexes that all the collections * in the given array collections has. * This function should be called at coordinator only as the index metadata table * is available on coordinator. */

 * is available on coordinator.
 */
int
CollectionIdsGetIndexCount(ArrayType *collectionIdsArray)
{
	const char *query =
		FormatSqlQuery("SELECT COUNT(*) FROM %s.collection_indexes "
					   "WHERE collection_id = ANY($1) AND (index_is_valid OR %s.index_build_is_in_progress(index_id))",
					   ApiCatalogSchemaName, ApiInternalSchemaName);

	int nargs = 1;
	Oid argTypes[1] = { INT8ARRAYOID };
	Datum argValues[1] = { PointerGetDatum(collectionIdsArray) };

	bool isReadOnly = true;
	bool isNull = false;
	Datum resultDatum = ExtensionExecuteQueryWithArgsViaSPI(query, nargs, argTypes,
															argValues,
															NULL, isReadOnly,
															SPI_OK_SELECT,
															&isNull);


	Assert(!isNull);
	if (DatumGetInt64(resultDatum) > INT_MAX)
	{
		ereport(ERROR, (errmsg("found too many indexes in index metadata")));
	}

	return DatumGetInt64(resultDatum);
}


/*