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[jira] [Created] (FLINK-10216) Add REGEXP_MATCH in TableAPI and SQL

Juho Autio created FLINK-10216:

             Summary: Add REGEXP_MATCH in TableAPI and SQL
                 Key: FLINK-10216
                 URL: https://issues.apache.org/jira/browse/FLINK-10216
             Project: Flink
          Issue Type: Sub-task
            Reporter: Juho Autio

Here's a naive implementation:

public class RegexpMatchFunction extends ScalarFunction {
    // NOTE! Flink calls eval() by reflection
    public boolean eval(String value, String pattern) {
        return value != null && pattern != null && value.matches(pattern);

I wonder if there would be a way to optimize this to use {{Pattern.compile(value)}} and use the compiled Pattern for multiple calls (possibly different values, but same pattern).

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