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https://issues.apache.org/jira/browse/FLINK-35931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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dalongliu reassigned FLINK-35931:
---------------------------------
Assignee: Dylan He
> Add REGEXP_EXTRACT_ALL function
> -------------------------------
>
> Key: FLINK-35931
> URL: https://issues.apache.org/jira/browse/FLINK-35931
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Dylan He
> Assignee: Dylan He
> Priority: Major
>
> Add REGEXP_EXTRACT_ALL function.
> ----
> Extracts all of the strings in {{str}} that match the {{regexp}} expression
> and correspond to the regex group {{idx}}.
> Example:
> {code:sql}
> > SELECT REGEXP_EXTRACT_ALL('100-200, 300-400', '(\\d+)-(\\d+)', 1);
> [100, 300]
> > SELECT REGEXP_EXTRACT_ALL('100-200, 300-400', r'(\d+)-(\d+)', 1);
> ["100","300"]
> {code}
> Syntax:
> {code:sql}
> REGEXP_EXTRACT_ALL(str, regexp[, idx])
> {code}
> Arguments:
> * {{str}}: A STRING expression to be matched.
> * {{regexp}}: A STRING expression with a matching pattern.
> * {{idx}}: An optional INTEGER expression greater or equal 0 with default 1.
> Returns:
> An ARRAY<STRING>.
> {{regexp}} must be a Java regular expression.
> When using literals, use `raw-literal` (`r` prefix) to avoid escape character
> pre-processing.
> {{regexp}} may contain multiple groups. {{idx}} indicates which regex group
> to extract. An {{idx}} of 0 means matching the entire regular expression.
> See also:
> *
> [Spark|https://spark.apache.org/docs/3.5.1/sql-ref-functions-builtin.html#string-functions]
> *
> [Databricks|https://docs.databricks.com/en/sql/language-manual/functions/regexp_extract_all.html]
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