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Blargian 2024-07-06 11:17:21 +02:00
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docs/en/sql-reference/functions/string-functions.md
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@ -568,7 +568,7 @@ SELECT upper('clickhouse');
Converts a string to lowercase, assuming that the string contains valid UTF-8 encoded text. If this assumption is violated, no exception is thrown and the result is undefined.
:::note
Does not detect the language, e.g. for Turkish the result might not be exactly correct (i/İ vs. i/I). If the length of the UTF-8 byte sequence is different for upper and lower case of a code point, the result may be incorrect for this code point.
Does not detect the language, e.g. for Turkish the result might not be exactly correct (i/İ vs. i/I). If the length of the UTF-8 byte sequence is different for upper and lower case of a code point (such as `ẞ` and `ß`), the result may be incorrect for this code point.
:::
**Syntax**
@ -606,7 +606,7 @@ Result:
Converts a string to uppercase, assuming that the string contains valid UTF-8 encoded text. If this assumption is violated, no exception is thrown and the result is undefined.
:::note
Does not detect the language, e.g. for Turkish the result might not be exactly correct (i/İ vs. i/I). If the length of the UTF-8 byte sequence is different for upper and lower case of a code point, the result may be incorrect for this code point.
Does not detect the language, e.g. for Turkish the result might not be exactly correct (i/İ vs. i/I). If the length of the UTF-8 byte sequence is different for upper and lower case of a code point (such as `ẞ` and `ß`), the result may be incorrect for this code point.
:::
**Syntax**
@ -2336,6 +2336,24 @@ Result:
Convert the first letter of each word to upper case and the rest to lower case. Words are sequences of alphanumeric characters separated by non-alphanumeric characters.
:::note
Because `initCap` converts only the first letter of each word to upper case you may observe unexpected behaviour for words containing apostrophes or capital letters. For example:
```sql
SELECT initCap('mother''s daughter'), initCap('joe McAdam');
```
will return
```response
┌─initCap('mother\'s daughter')─┬─initCap('joe McAdam')─┐
│ Mother'S Daughter │ Joe Mcadam │
└───────────────────────────────┴───────────────────────┘
```
This is a known behaviour, with no plans currently to fix it.
:::
**Syntax**
```sql