sjyango opened a new pull request, #31193:
URL: https://github.com/apache/doris/pull/31193
## Proposed changes
Issue Number: close #31138
<!--Describe your changes.-->
Support `xxhash_32` and `xxhash_64` fucntion.
```SQL
mysql> select xxhash_32('hello', 'world', '!');
+----------------------------------+
| xxhash_32('hello', 'world', '!') |
+----------------------------------+
| 352087701 |
+----------------------------------+
1 row in set (0.06 sec)
mysql> select xxhash_32('hello', 'world', NULL);
+-----------------------------------+
| xxhash_32('hello', 'world', NULL) |
+-----------------------------------+
| NULL |
+-----------------------------------+
1 row in set (0.01 sec)
mysql> select xxhash_64('hello');
+----------------------+
| xxhash_64('hello') |
+----------------------+
| -7685981735718036227 |
+----------------------+
1 row in set (0.07 sec)
mysql> select xxhash_64('hello', 'world');
+-----------------------------+
| xxhash_64('hello', 'world') |
+-----------------------------+
| 7001965798170371843 |
+-----------------------------+
1 row in set (0.06 sec)
mysql> select xxhash_64('hello', NULL);
+--------------------------+
| xxhash_64('hello', NULL) |
+--------------------------+
| NULL |
+--------------------------+
1 row in set (0.01 sec)
mysql> select xxhash_64('hello', 'world', '!');
+----------------------------------+
| xxhash_64('hello', 'world', '!') |
+----------------------------------+
| 6796829678999971400 |
+----------------------------------+
1 row in set (0.06 sec)
mysql> select xxhash_64('hello', 'world', NULL);
+-----------------------------------+
| xxhash_64('hello', 'world', NULL) |
+-----------------------------------+
| NULL |
+-----------------------------------+
1 row in set (0.01 sec)
```
## Further comments
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