Function IndexIdGetIndexDetailsCore

pg_documentdb/src/metadata/index.c:296–339

* IndexIdGetIndexDetails searches for the given indexId and * returns an IndexDetails object if found or NULL if there is * no such index. */

 * no such index.
 */
static IndexDetails *
IndexIdGetIndexDetailsCore(int indexId, bool includeCurrentTransactions)
{
	const char *cmdStr =
		FormatSqlQuery(
			"SELECT collection_id, index_spec, %s.index_build_is_in_progress(index_id)"
			" FROM %s.collection_indexes WHERE index_id = $1",
			ApiInternalSchemaName, ApiCatalogSchemaName);

	int argCount = 1;
	Oid argTypes[1];
	Datum argValues[1];

	argTypes[0] = INT4OID;
	argValues[0] = Int32GetDatum(indexId);

	/* all args are non-null */
	char *argNulls = NULL;

	/* readOnly only gives durably committed writes - for including current transactions
	 * readonly needs to be false.
	 */
	bool readOnly = !includeCurrentTransactions;

	int numValues = 3;
	bool isNull[3];
	Datum results[3];
	ExtensionExecuteMultiValueQueryWithArgsViaSPI(cmdStr, argCount, argTypes,
												  argValues, argNulls, readOnly,
												  SPI_OK_SELECT, results, isNull,
												  numValues);
	if (isNull[0] || isNull[1])
	{
		return NULL;
	}

	IndexDetails *indexDetails = palloc0(sizeof(IndexDetails));
	indexDetails->indexId = indexId;
	indexDetails->collectionId = DatumGetInt64(results[0]);
	indexDetails->indexSpec = *DatumGetIndexSpec(results[1]);
	indexDetails->isIndexBuildInProgress = DatumGetBool(results[2]);

	return indexDetails;
}


IndexDetails *