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encryption-and-compression-functions: Update for MySQL 8.0 #16852

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Apr 18, 2024
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encryption-and-compression-functions: Update for MySQL 8.0 #16852

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encryption-and-compression-functions: Update for MySQL 8.0
dveeden Mar 26, 2024
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Update functions-and-operators/encryption-and-compression-functions.md
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Update functions-and-operators/encryption-and-compression-functions.md
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10 changes: 8 additions & 2 deletions functions-and-operators/encryption-and-compression-functions.md
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Expand Up @@ -6,7 +6,7 @@ aliases: ['/docs/dev/functions-and-operators/encryption-and-compression-function

# Encryption and Compression Functions

TiDB supports most of the [encryption and compression functions](https://dev.mysql.com/doc/refman/5.7/en/encryption-functions.html) available in MySQL 5.7.
TiDB supports most of the [encryption and compression functions](https://dev.mysql.com/doc/refman/8.0/en/encryption-functions.html) available in MySQL 8.0.

## Supported functions

Expand All @@ -27,9 +27,15 @@ TiDB supports most of the [encryption and compression functions](https://dev.mys

## Related system variables

The `block_encryption_mode` variable sets the encryption mode that is used for `AES_ENCRYPT()` and `AES_DECRYPT()`.
The [`block_encryption_mode`](/system-variables.md#block_encryption_mode) variable sets the encryption mode that is used for `AES_ENCRYPT()` and `AES_DECRYPT()`.

The [`validate_password.*`](/system-variables.md) variables affect the `VALIDATE_PASSWORD_STRENGTH()` function.

## Unsupported functions

* `DES_DECRYPT()`, `DES_ENCRYPT()`, `OLD_PASSWORD()`, `ENCRYPT()`: these functions were deprecated in MySQL 5.7 and removed in 8.0.
* Functions only available in MySQL Enterprise [Issue #2632](https://github.com/pingcap/tidb/issues/2632).

## MySQL compatibility

* TiDB does not support the `STATEMENT_DIGEST()` and `STATEMENT_DIGEST_TEXT()` functions.
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