Feature Support Detail
Main Features
| Feature Support | TiSpark 2.4.x | TiSpark 2.5.x | TiSpark 3.0.x | TiSpark master |
|---|---|---|---|---|
| SQL select without tidb_catalog | ✔ | ✔ | ||
| SQL select with tidb_catalog | ✔ | ✔ | ✔ | |
| DataFrame append | ✔ | ✔ | ✔ | ✔ |
| DataFrame reads | ✔ | ✔ | ✔ | ✔ |
| SQL show databases | ✔ | ✔ | ✔ | ✔ |
| SQL show tables | ✔ | ✔ | ✔ | ✔ |
| SQL auth | ✔ | ✔ | ✔ | |
| SQL delete from with tidb_catalog | ✔ | ✔ | ||
| TLS | ✔ | ✔ | ||
| DataFrame auth | ✔ |
Read
you can read with both SQL select and DataFrame reads
Push down
TiSpark can push down some operators to TiKV
- predicate
- aggregate
need to be described more clearly
Table Partition
TiSpark currently supports Range Partition and Hash Partition. Users can select data from the Range Partition table and the Hash Partition table through TiSpark.
In most cases, TiSpark use a full table scan on partition tables. Only in certain cases, TiSpark applies partition pruning. For more details, see here.
Expression Index
tidb-5.0 supports Expression Index.
TiSpark currently supports retrieving data from table with Expression Index, but the Expression Index will not be used by the planner of TiSpark.
TiFlash
TiSpark can read from TiFlash with the configuration spark.tispark.isolation_read_engines
Write
You can only write to TiDB with DataFrame append now
Not supported
- write to the partition table