tanclary commented on code in PR #3369:
URL: https://github.com/apache/calcite/pull/3369#discussion_r1300713409


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site/_docs/reference.md:
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@@ -2783,7 +2783,9 @@ BigQuery's type system uses confusingly different names 
for types and functions:
 | h s | PARSE_URL(urlString, partToExtract [, keyToExtract] ) | Returns the 
specified *partToExtract* from the *urlString*. Valid values for 
*partToExtract* include HOST, PATH, QUERY, REF, PROTOCOL, AUTHORITY, FILE, and 
USERINFO. *keyToExtract* specifies which query to extract
 | b | POW(numeric1, numeric2)                        | Returns *numeric1* 
raised to the power *numeric2*
 | b | REGEXP_CONTAINS(string, regexp)                | Returns whether 
*string* is a partial match for the *regexp*
+| b | REGEXP_EXTRACT(string, regexp[, position[, occurrence]]) | Returns the 
substring in *string* that matches the *regexp*. Returns `NULL` if there is no 
match. Use *position* for the start index of search range and *occurrence* for 
the specific occurence of match in *string*

Review Comment:
   oh interesting. in that case i guess either is fine but it should probably 
be standardized.



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