pg_parse 0.14.0

PostgreSQL parser that uses the actual PostgreSQL server source to parse SQL queries and return the internal PostgreSQL parse tree.
Documentation 
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/*
 * Thin wrapper over the libpg_query SysCacheGetAttr mock: assert the value
 * isn't NULL and return its Datum.
 */
Datum
SysCacheGetAttrNotNull(int cacheId, HeapTuple tup, AttrNumber attributeNumber)
{
	bool		isNull;
	Datum		d = SysCacheGetAttr(cacheId, tup, attributeNumber, &isNull);

	if (isNull)
		elog(ERROR, "unexpected null attribute %d from pg_proc tuple", attributeNumber);
	return d;
}