Expression is the combination of call and operations against constant and alias.
Purpose |
Example |
|---|---|
| Decimal constant | -10.25，1，1691636269 |
| Textual constant | "graph"，'uql'，' both ' and " '，"2020-01-01 0:0:0" |
| List built with constant | [1, 2, 3]，["graph", "database"]，[ ] |
| Call alias | nodes，edges，paths，mylist，groupName，count，`ABC-123` |
| Call property | nodes.age，edges.`version-old`，this.age，age |
| Call x or y of point | location.x，location.y |
| Call schema | edges.@，this.@ |
| Call element(s) of list | mylist[5]，mylist[3:6]，mylist[2:]，mylist[:4] |
| List built with alias | [nodes.level, -1, "NaN"]，[groupName, count] |
| Decuplication | DISTINCT nodes.name，DISTINCT nodes.name, nodes.age |
| Numeric operation | 1 + 3 * 2，year("2022-04-12") % 4 |
| Conditional operation | 3 > 1，nodes.age == 20，@default，groupName IN ["graph", "database"] |
| Logic operation | @student && age > 10 |
| General function operation | now()，toString(nodes.age)，length(paths) |
| Aggregation function operation | count(nodes)，collect(nodes.age) |
| null judgement | nodes.age IS NULL，edges.time IS NOT NULL |
| CASE function operation | CASE WHEN score >= 80 THEN "pass" ELSE "fail" END |
Regarding call formats of alias please refer to Alias System.
Regarding more functions please refer to Function.