Reserved keywords in UQL are words that have a special meaning and control the behavior of UQL queries. These reserved keywords cannot be used as names for alias, schema, property, etc.
UQL has the following reserved keywords.
| Category | Words |
|---|---|
| System Property | _id, _uuid, _from, _to, _from_uuid, _to_uuid |
| System Table Alias | _graph, _graph_shard_N _nodeSchema, _nodeSchema_shard_N _edgeSchema, _edgeSchema_shard_N, _graphCount, _nodeProperty, _nodeProperty_shard_N, _edgeProperty, _edgeProperty_shard_N, _nodeIndex, _edgeIndex, _nodeFulltext, _edgeFulltext, _statistic, _top, _task, _policy, _user, _privilege, _algoList, _extaList, _hdcGraphList, _projectionList |
| System Alias | this，prev_n，prev_e |
| Operator[1] | IN, NIN, CONTAINS, XOR, DISTINCT, IS NULL, IS NOT NULL |
| Statement[1] | GROUP BY, ORDER BY, SKIP, LIMIT, WHERE, RETURN, WITH, UNCOLLECT, UNION, UNION ALL, CALL, OPTIONAL, EXPLAIN |
| Modifiers[1] | AS, ASC, DESC |
| Expression[1] | CASE, WHEN, THEN, ELSE, END |
[1] Those keywords are case insensitive.