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https://issues.apache.org/jira/browse/CALCITE-5911?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jerin John updated CALCITE-5911:
--------------------------------
    Description: 
Add support for 
[REGEXP_EXTRACT_ALL|https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#regexp_extract_all]
 function from BigQuery.

*{{REGEXP_EXTRACT_ALL(value, regexp)}}*
Returns an array of all substrings of value that match the re2 regular 
expression, regexp. Returns an empty array if there is no match.

* If the regular expression contains a capturing group ((...)), and there is a 
match for that capturing group, that match is added to the results. If there 
are multiple matches for a capturing group, the last match is added to the 
results.

  was:
Add support for 
[REGEXP_EXTRACT|https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#regexp_extract]
 and 
[REGEXP_EXTRACT_ALL|https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#regexp_extract_all]
 functions from BigQuery.

*{{REGEXP_EXTRACT(value, regexp[, position[, occurrence]])}}*
Returns the substring in {{value}} that matches the regular expression 
{{{}regexp{}}}. Returns {{NULL}} if there is no match.

* If the regular expression contains a capturing group ({{{}(...){}}}), and 
there is a match for that capturing group, that match is returned. If there are 
multiple matches for a capturing group, the last match is returned.
* If {{position}} is specified, the search starts at this position in 
{{{}value{}}}, otherwise it starts at the beginning of {{{}value{}}}.
* If {{occurrence}} is specified, the search returns a specific occurrence of 
the {{regexp}} in {{{}value{}}}, otherwise returns the first match.

*{{REGEXP_EXTRACT_ALL(value, regexp)}}*
Returns an array of all substrings of value that match the re2 regular 
expression, regexp. Returns an empty array if there is no match.



> Implement BigQuery function REGEXP_EXTRACT_ALL
> ----------------------------------------------
>
>                 Key: CALCITE-5911
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5911
>             Project: Calcite
>          Issue Type: Task
>            Reporter: Jerin John
>            Assignee: Jerin John
>            Priority: Major
>              Labels: pull-request-available
>
> Add support for 
> [REGEXP_EXTRACT_ALL|https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#regexp_extract_all]
>  function from BigQuery.
> *{{REGEXP_EXTRACT_ALL(value, regexp)}}*
> Returns an array of all substrings of value that match the re2 regular 
> expression, regexp. Returns an empty array if there is no match.
> * If the regular expression contains a capturing group ((...)), and there is 
> a match for that capturing group, that match is added to the results. If 
> there are multiple matches for a capturing group, the last match is added to 
> the results.



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