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Tidb basic functions
2022-06-27 06:34:00 【Tianxiang shop】
This article lists TiDB Support changes of functions in each version . Please note that , Support for experimental features may change before the final version is released .
data type , Functions and operators
| data type , function , The operator | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| value type | Y | Y | Y | Y | Y | Y | Y | Y |
| Date and time type | Y | Y | Y | Y | Y | Y | Y | Y |
| String type | Y | Y | Y | Y | Y | Y | Y | Y |
| JSON type | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| Control flow function | Y | Y | Y | Y | Y | Y | Y | Y |
| String function | Y | Y | Y | Y | Y | Y | Y | Y |
| Numeric functions and operators | Y | Y | Y | Y | Y | Y | Y | Y |
| Date and time functions | Y | Y | Y | Y | Y | Y | Y | Y |
| Bit functions and operators | Y | Y | Y | Y | Y | Y | Y | Y |
| Cast Functions and operators | Y | Y | Y | Y | Y | Y | Y | Y |
| Encryption and compression functions | Y | Y | Y | Y | Y | Y | Y | Y |
| Information functions | Y | Y | Y | Y | Y | Y | Y | Y |
| JSON function | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| Aggregate functions | Y | Y | Y | Y | Y | Y | Y | Y |
| Window function | Y | Y | Y | Y | Y | Y | Y | Y |
| Other functions | Y | Y | Y | Y | Y | Y | Y | Y |
| The operator | Y | Y | Y | Y | Y | Y | Y | Y |
| Character set and collation 1 | Y | Y | Y | Y | Y | Y | Y | Y |
| User level lock | Y | N | N | N | N | N | N | N |
Indexes and constraints
| Indexes and constraints | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| Expression index | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| The column type storage (TiFlash) | Y | Y | Y | Y | Y | Y | Y | Y |
| RocksDB engine | Y | Y | Y | Y | Y | Y | Y | Y |
| Titan plug-in unit | Y | Y | Y | Y | Y | Y | Y | Y |
| Invisible index | Y | Y | Y | Y | Y | Y | Y | N |
| Composite primary key | Y | Y | Y | Y | Y | Y | Y | Y |
| Unique constraint | Y | Y | Y | Y | Y | Y | Y | Y |
| Cluster index on integer primary key | Y | Y | Y | Y | Y | Y | Y | Y |
| Clustered indexes on composite or non integer primary keys | Y | Y | Y | Y | Y | Y | Y | N |
SQL sentence
| SQL sentence 2 | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
SELECT,INSERT,UPDATE,DELETE,REPLACE | Y | Y | Y | Y | Y | Y | Y | Y |
INSERT ON DUPLICATE KEY UPDATE | Y | Y | Y | Y | Y | Y | Y | Y |
LOAD DATA INFILE | Y | Y | Y | Y | Y | Y | Y | Y |
SELECT INTO OUTFILE | Y | Y | Y | Y | Y | Y | Y | Y |
INNER JOIN, LEFT\|RIGHT [OUTER] JOIN | Y | Y | Y | Y | Y | Y | Y | Y |
UNION,UNION ALL | Y | Y | Y | Y | Y | Y | Y | Y |
| EXCEPT and INTERSECT Operator | Y | Y | Y | Y | Y | Y | Y | N |
GROUP BY,ORDER BY | Y | Y | Y | Y | Y | Y | Y | Y |
| Window function | Y | Y | Y | Y | Y | Y | Y | Y |
| Common table expressions (CTE) | Y | Y | Y | Y | Y | Y | N | N |
START TRANSACTION,COMMIT,ROLLBACK | Y | Y | Y | Y | Y | Y | Y | Y |
| EXPLAIN | Y | Y | Y | Y | Y | Y | Y | Y |
| EXPLAIN ANALYZE | Y | Y | Y | Y | Y | Y | Y | Y |
| User defined variables | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| BATCH [ON COLUMN] LIMIT INTEGER DELETE | Y | N | N | N | N | N | N | N |
senior SQL function
| senior SQL function | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| Execution plan cache | Y | Y | Y | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| Executive plan management (SPM) | Y | Y | Y | Y | Y | Y | Y | Y |
| Push down the calculation result cache (Coprocessor Cache) | Y | Y | Y | Y | Y | Y | Y | Experimental characteristics |
| Stale Read | Y | Y | Y | Y | Y | Y | N | N |
| Follower Read | Y | Y | Y | Y | Y | Y | Y | Y |
| Through system variables tidb_snapshot Read historical data | Y | Y | Y | Y | Y | Y | Y | Y |
| Optimizer hints | Y | Y | Y | Y | Y | Y | Y | Y |
| MPP Execution engine | Y | Y | Y | Y | Y | Y | Y | N |
| Index merging | Y | Y | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| be based on SQL Data placement rules | Y | Y | Experimental characteristics | Experimental characteristics | N | N | N | N |
Data definition language (DDL)
| Data definition language (DDL) | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
CREATE,DROP,ALTER,RENAME,TRUNCATE | Y | Y | Y | Y | Y | Y | Y | Y |
| Generate columns | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| View | Y | Y | Y | Y | Y | Y | Y | Y |
| Sequence | Y | Y | Y | Y | Y | Y | Y | Y |
| AUTO_INCREMENT Column | Y | Y | Y | Y | Y | Y | Y | Y |
| AUTO_RANDOM Column | Y | Y | Y | Y | Y | Y | Y | Y |
| DDL Algorithm asserts | Y | Y | Y | Y | Y | Y | Y | Y |
| Add multiple columns to a single statement | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| Change the column type | Y | Y | Y | Y | Y | Y | N | N |
| A temporary table | Y | Y | Y | Y | N | N | N | N |
Business
| Business | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| Async commit | Y | Y | Y | Y | Y | Y | Y | N |
| 1PC | Y | Y | Y | Y | Y | Y | Y | N |
| Large transactions (10 GB) | Y | Y | Y | Y | Y | Y | Y | Y |
| Pessimism | Y | Y | Y | Y | Y | Y | Y | Y |
| Optimistic business | Y | Y | Y | Y | Y | Y | Y | Y |
| Repeatable read isolation （ Snapshot Isolation ） | Y | Y | Y | Y | Y | Y | Y | Y |
| Read committed quarantine | Y | Y | Y | Y | Y | Y | Y | Y |
Partition
| Partition | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| Range Partition | Y | Y | Y | Y | Y | Y | Y | Y |
| Hash Partition | Y | Y | Y | Y | Y | Y | Y | Y |
| List Partition | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | N |
| List COLUMNS Partition | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | N |
| EXCHANGE PARTITION | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | N |
| Dynamic clipping | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | N | N |
Statistics
| Statistics | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| CM-Sketch | Off by default | Off by default | Off by default | Off by default | Y | Y | Y | Y |
| Histogram | Y | Y | Y | Y | Y | Y | Y | Y |
| Extended Statistics （ Multiple columns ） | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | N |
| Statistical feedback | obsolete | obsolete | obsolete | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| Statistics are automatically updated | Y | Y | Y | Y | Y | Y | Y | Y |
| Fast analysis | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| Dynamic clipping | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | N | N |
Security
| Security | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| Transport layer encryption (TLS) | Y | Y | Y | Y | Y | Y | Y | Y |
| Static encryption (TDE) | Y | Y | Y | Y | Y | Y | Y | Y |
| Role-based access control (RBAC) | Y | Y | Y | Y | Y | Y | Y | Y |
| Certificate authentication | Y | Y | Y | Y | Y | Y | Y | Y |
caching_sha2_password authentication | Y | Y | Y | Y | Y | N | N | N |
| And MySQL Compatible GRANT Rights management | Y | Y | Y | Y | Y | Y | Y | Y |
| Dynamic permissions | Y | Y | Y | Y | Y | Y | N | N |
| Security enhancement mode | Y | Y | Y | Y | Y | Y | N | N |
| Log desensitization | Y | Y | Y | Y | Y | Y | Y | N |
Data import and export
| Data import and export | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| Fast import (TiDB Lightning) | Y | Y | Y | Y | Y | Y | Y | Y |
| mydumper Logic import | obsolete | obsolete | obsolete | obsolete | obsolete | obsolete | obsolete | obsolete |
| Dumpling Logic import | Y | Y | Y | Y | Y | Y | Y | Y |
| Business LOAD DATA | Y | Y | Y | Y | Y | Y | Y | N 3 |
| Data migration tools | Y | Y | Y | Y | Y | Y | Y | Y |
| TiDB Binlog | Y | Y | Y | Y | Y | Y | Y | Y |
| Change data capture (CDC) | Y | Y | Y | Y | Y | Y | Y | Y |
management , Visualization and tools
| management , Visual diagnostics and tools | 6.1 | 6.0 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
|---|---|---|---|---|---|---|---|---|
| TiDB Dashboard Graphic display | Y | Y | Y | Y | Y | Y | Y | Y |
| TiDB Dashboard Continuous performance analysis function | Y | Y | Experimental characteristics | Experimental characteristics | N | N | N | N |
| TiDB Dashboard Top SQL function | Y | Y | Experimental characteristics | N | N | N | N | N |
| TiDB Dashboard SQL Diagnostic function | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| Information schema | Y | Y | Y | Y | Y | Y | Y | Y |
| Metrics schema | Y | Y | Y | Y | Y | Y | Y | Y |
| Statements summary tables | Y | Y | Y | Y | Y | Y | Y | Y |
| Slow query log | Y | Y | Y | Y | Y | Y | Y | Y |
| TiUP Deploy | Y | Y | Y | Y | Y | Y | Y | Y |
| Ansible Deploy | N | N | N | N | N | N | N | obsolete |
| Kubernetes operator | Y | Y | Y | Y | Y | Y | Y | Y |
| Built in physical backup | Y | Y | Y | Y | Y | Y | Y | Y |
| Global Kill | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| Lock View | Y | Y | Y | Y | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| SHOW CONFIG | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| SET CONFIG | Y | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics | Experimental characteristics |
| DM WebUI | Experimental characteristics | Experimental characteristics | N | N | N | N | N | N |
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