Currently, PALO.DFILTER can work with string values only when using "=" operator (Also, when using ">" operator,some string values are filtered lexicographically,though).
But, it does not support pattern matching.
In addition,">" operator doesn't work with double byte characters(e.g. Japanese) as expected.
Our customer would like this feature(pattern matching) because they think the current capabilities of PALO.DFILTER for string values are very limited thus they can not make the use of it.
