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FastScan GA #12867

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FastScan GA #12867

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FastScan GA
shichun-0415 Mar 13, 2023
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refine
shichun-0415 Mar 13, 2023
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update the path of fastscan
shichun-0415 Mar 13, 2023
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change fastscan file name
shichun-0415 Mar 13, 2023
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32 changes: 16 additions & 16 deletions basic-features.md
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Expand Up @@ -44,22 +44,22 @@ This document lists the features supported in different TiDB versions, including

## Indexing and constraints

| Indexing and constraints | 6.6 | 6.5 | 6.1 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
| ------------------------------------------------------------ | :--: | :--: | ------------ | :----------: | :----------: | :----------: | :----------: | :----------: | :----------: |
| [Expression indexes](/sql-statements/sql-statement-create-index.md#expression-index) [^2] | Y | Y | E | E | E | E | E | E ||
| [Columnar storage (TiFlash)](/tiflash/tiflash-overview.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Use FastScan to accelerate queries in OLAP scenarios](/develop/dev-guide-use-fastscan.md) | E | E | N | N | N | N | N | N | N |
| [RocksDB engine](/storage-engine/rocksdb-overview.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Titan plugin](/storage-engine/titan-overview.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Titan Level Merge](/storage-engine/titan-configuration.md#level-merge-experimental) | E | E | E | E | E | E | E | E | E |
| [Use buckets to improve scan concurrency](/tune-region-performance.md#use-bucket-to-increase-concurrency) | E | E | E | N | N | N | N | N | N |
| [Invisible indexes](/sql-statements/sql-statement-add-index.md) | Y | Y | Y | Y | Y | Y | Y | Y | N |
| [Composite `PRIMARY KEY`](/constraints.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Unique indexes](/constraints.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Clustered index on integer `PRIMARY KEY`](/constraints.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Clustered index on composite or non-integer key](/constraints.md) | Y | Y | Y | Y | Y | Y | Y | Y | N |
| [Multi-valued index](/sql-statements/sql-statement-create-index.md#multi-valued-index) | E | N | N | N | N | N | N | N |
| [Foreign key](/constraints.md#foreign-key) | Y | N | N | N | N | N | N | N |
| Indexing and constraints | 7.0 | 6.6 | 6.5 | 6.1 | 5.4 | 5.3 | 5.2 | 5.1 | 5.0 | 4.0 |
| ------------------------------------------------------------ | :--: | :--: | :--: | ------------ | :----------: | :----------: | :----------: | :----------: | :----------: | :----------: |
| [Expression indexes](/sql-statements/sql-statement-create-index.md#expression-index) [^2] | Y | Y | Y | E | E | E | E | E | E ||
| [Columnar storage (TiFlash)](/tiflash/tiflash-overview.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Use FastScan to accelerate queries in OLAP scenarios](/develop/dev-guide-use-fastscan.md) | Y | E | E | N | N | N | N | N | N | N |
| [RocksDB engine](/storage-engine/rocksdb-overview.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Titan plugin](/storage-engine/titan-overview.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Titan Level Merge](/storage-engine/titan-configuration.md#level-merge-experimental) | E | E | E | E | E | E | E | E | E | E |
| [Use buckets to improve scan concurrency](/tune-region-performance.md#use-bucket-to-increase-concurrency) | E | E | E | E | N | N | N | N | N | N |
| [Invisible indexes](/sql-statements/sql-statement-add-index.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y | N |
| [Composite `PRIMARY KEY`](/constraints.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Unique indexes](/constraints.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Clustered index on integer `PRIMARY KEY`](/constraints.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
| [Clustered index on composite or non-integer key](/constraints.md) | Y | Y | Y | Y | Y | Y | Y | Y | Y | N |
| [Multi-valued index](/sql-statements/sql-statement-create-index.md#multi-valued-index) | E | E | N | N | N | N | N | N | N |
| [Foreign key](/constraints.md#foreign-key) | Y | Y | N | N | N | N | N | N | N |

## SQL statements

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4 changes: 0 additions & 4 deletions develop/dev-guide-use-fastscan.md
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Expand Up @@ -6,10 +6,6 @@ aliases: ['/tidb/dev/sql-statement-set-tiflash-mode']

# FastScan

> **Warning:**
>
> This feature is experimental and its form and usage may change in subsequent versions.

This document describes how to use FastScan to speed up queries in Online Analytical Processing (OLAP) scenarios.

By default, TiFlash guarantees the precision of query results and data consistency. With the feature FastScan, TiFlash provides more efficient query performance, but does not guarantee the accuracy of query results and data consistency.
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2 changes: 1 addition & 1 deletion tiflash-620-upgrade-guide.md
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Expand Up @@ -14,7 +14,7 @@ To learn the standard upgrade process, see the following documents:

> **Note:**
>
> - An experimental feature introduced in v6.2.0, [FastScan](/develop/dev-guide-use-fastscan.md) provides more efficient query performance at the cost of strong data consistency. Note that the form and usage of this feature might change in subsequent versions.
> - [FastScan](/develop/dev-guide-use-fastscan.md) is introduced in v6.2.0 as an experimental feature and becomes generally available (GA) in v7.0.0. It provides more efficient query performance at the cost of strong data consistency.
>
> - It is not recommended that you upgrade TiDB that includes TiFlash across major versions, for example, from v4.x to v6.x. Instead, you need to upgrade from v4.x to v5.x first, and then to v6.x.
>
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