Nebula Graph v2.0.0-alpha Release Note
Note: Schema & data are not compatible with 1.0 yet. Still working on the compatibility.
- Support String vertex ID
- New data types
NULL, the property for vertices or edges can be set to
NOT NULLconstraint is supported to ensure the property values are not NULL.
- Composite types: list, set and map(Cannot be stored as properties).
- Temporal types like
- New Functions
size()returns the number of items in a list
time()returns the current Time
datetime()Returns the current Date or DateTime
id()returns the id of a vertex
labels()return the tags of the vertex
collect(), an aggregation function, returns a list containing the values returned by an expression
collect_set(), aggregation function, returns a set containing the values returned by an expression
properties()returns a map containing all the properties of a vertex or an edge
type()returns the edge type of an edge
src()returns the src id of an edge
dst()returns the dst id of an edge
rank()returns the rank of an edge
- New Operators
INchecks if a specified value matches any value in a list.
CONTAINSperforms a case-sensitive match regardless of location within a string.
STARTS WITHperforms a case-sensitive match for the beginning of a string.
ENDS WITHperforms a case-sensitive match for the ending of a string.
- Explain & Profile.
EXPLAINdisplays the execution plan of a nGQL statement without executing the statement. PROFILE executes the statement, then outputs the execution plan as well as the execution profile.
GET SUBGRAPHstatement retrieves information of vertices and edges reachable from the start vertices over the specified edges to the maximum number of hops.
- Partially supported
DELETEstatement can have an input from the pipeline
Features different from 1.0
CREATE SPACEsupports specifying the type of vertex ID. The type
int64will be supported in the next release).
- Simplify `UPDATE/UPSERT statement.
UPSERT ... SETthe unspecified properties will be set to the default value when inserting a new vertex/edge. If no default value is set, they will be set to
NULL. If the
NOT NULLconstraint is set on the property, an error will return.
$-in the pipeline statement is not equal to
- The expression specified in the default value will be computed when the data inserted instead of schema defined.
Upcoming Soon (Work in process)
DESCRIBE TAG/EDGE INDEX
REBUILD TAG/EDGE INDEX
SHOW TAG/EDGE INDEXES
SHOW TAG/EDGE INDEX STATUS
FETCH PROP ONmultiple tags
- Compatible with 1.0 Integer vertex ID
- Support more OpenCypher statements
- Backup & Restore
- Fulltext search
- Nebula-console supports local commands now. For example,
:set csvoutputs the query results to the console and the specified CSV file. For more information, please refer to nebula-console.
Clients support connection pooling and load balancing. For more information, please refer to nebula-clients.
- Not Compatible with Nebula Graph 2.0 yet (Working in progress).
- Please refer to https://github.com/vesoft-inc/nebula-docs/tree/master/docs-2.0.
If you have any problem or feature request, please leave a comment here: https://discuss.nebula-graph.io/t/nebula-graph-v2-0-0-alpha-release-note/754.
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