Cypher Coverage ¶
RedisGraph implements a subset of the Cypher language, which is growing as development continues. This document is based on the Cypher Query Language Reference (version 9), available at OpenCypher Resources .
Patterns ¶
Patterns are fully supported.
Types ¶
Structural types ¶

Nodes
 Nodes are fully supported save that a node can only be associated with a single label.
 Relationships
 Path variables (alternating sequence of nodes and relationships).
Composite types ¶
 Lists
Unsupported:
 Maps
 Temporal types (Date, DateTime, LocalDateTime, Time, LocalTime, Duration)
Literal types ¶
 Numeric types (64bit doubles and 64bit signed integer representations)
 String literals
 Booleans
Unsupported:
 Hexadecimal and octal numerics
Other ¶
NULL is supported as a representation of a missing or undefined value.
Comparability, equality, orderability, and equivalence ¶
This is a somewhat nebulous area in Cypher itself, with a lot of edge cases. Broadly speaking, RedisGraph behaves as expected with string and numeric values. There are likely some behaviors involving the numerics NaN, inf, inf, and possibly 0.0 that deviate from the Cypher standard. We do not support any of these properties at the type level, meaning nodes and relationships are not internally comparable.
Clauses ¶
Reading Clauses ¶
 MATCH
 OPTIONAL MATCH
Projecting Clauses ¶
 RETURN
 AS
 WITH
 UNWIND
Reading subclauses ¶
 WHERE
 ORDER BY
 SKIP
 LIMIT
Writing Clauses ¶
 CREATE

DELETE
 We actually implement DETACH DELETE, the distinction being that relationships invalidated by node deletions are automatically deleted.
 SET
Unsupported:

REMOVE (to modify properties)
 Properties can be deleted with SET [prop] = NULL.
Reading/Writing Clauses ¶
 MERGE

CALL (procedures)
 The currentlysupported procedures can be found in the Procedures documentation .
Set Operations ¶
 UNION
 UNION ALL
Functions ¶
Scalar functions ¶
 id
 labels
 timestamp
 type
 coalesce
Unsupported:
 Some casting functions (toBoolean, toFloat)
 Relationship functions (startNode, endNode)
 Temporal arithmetic functions
Aggregating functions ¶
 avg
 collect
 count
 max
 min
 percentileCont
 percentileDist
 stDev
 stDevP
 sum
List functions ¶
 head
 range
 reverse
 size
 tail
Math functions  numeric ¶
 abs
 ceil
 floor
 sign
 round
 rand
 toInteger
String functions ¶
 left
 right
 trim
 lTrim
 rTrim
 reverse
 substring
 toLower
 toUpper
 toString
Unsupported:
 replace
 split
Predicate functions ¶
 exists
Expression functions ¶
 case...when
Unsupported function classes ¶
 Logarithmic math functions
 Trigonometric math functions
 Userdefined functions
Operators ¶
Mathematical operators ¶
 Multiplication, addition, subtraction, division, modulo
Unsupported:
 Exponentiation
String operators ¶
 String operators (STARTS WITH, ENDS WITH, CONTAINS) are supported.
Unsupported:
 Regex operator
Boolean operators ¶
 AND
 OR
 NOT
 XOR
Parameters ¶
Parameters may be specified to allow for more flexible query construction:
MATCH (p:Person {name: $name_param}) RETURN p
Each RedisGraph client introduces a languageappropriate method for setting parameters, and is described in their documentation.
NonCypher queries ¶

RedisGraph provides the
GRAPH.EXPLAIN
command to print the execution plan of a provided query. 
GRAPH.DELETE
will remove a graph and all Redis keys associated with it.  We do not currently provide support for queries that retrieve schemas, though the LABELS and TYPE scalar functions may be used to get a graph overview.