Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/12206#discussion_r58752400
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/StringUtils.scala
---
@@ -52,4 +52,26 @@ object StringUtils {
def isTrueString(s: UTF8String): Boolean =
trueStrings.contains(s.toLowerCase)
def isFalseString(s: UTF8String): Boolean =
falseStrings.contains(s.toLowerCase)
+
+ /**
+ * This utility can be used for filtering pattern in the "Like" of "Show
Tables / Functions" DDL
+ * @param names the names list to be filtered
+ * @param pattern the filter pattern, only '*' and '|' are allowed as
wildcards, others will
+ * follows regular expression convention, case
insensitive match and white spaces
+ * on both ends will be ignored
+ * @return the filtered names list in order
+ */
+ def filterPattern(names: Seq[String], pattern: String): Seq[String] = {
+ val funcNames = scala.collection.mutable.SortedSet.empty[String]
+ pattern.trim().split("\\|").foreach {
--- End diff --
style:
```
....foreach { subPattern =>
try {
} ...
}
```
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