chunweilei commented on a change in pull request #1095: [CALCITE-2599] add the
ASCII function
URL: https://github.com/apache/calcite/pull/1095#discussion_r264007445
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File path: site/_docs/reference.md
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@@ -1447,10 +1448,10 @@ period:
| {fn SUBSTRING(string, offset, length)} | Returns a character string that
consists of *length* characters from *string* starting at the *offset* position
| {fn UCASE(string)} | Returns a string in which all alphabetic characters in
*string* have been converted to upper case
| {fn REPLACE(string, search, replacement)} | Returns a string in which all
the occurrences of *search* in *string* are replaced with *replacement*; if
*replacement* is the empty string, the occurrences of *search* are removed
+| {fn ASCII(string)} | Returns the corresponding ASCII code of the first
character of *string*; Returns 0 if *string* is empty; Returns NULL if *string*
is NULL
Review comment:
In my opinion, explicitly saying that behavior is undefined for non-basic
ascii looks like fine.
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