Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1848#discussion_r60071774
--- Diff:
flink-core/src/main/java/org/apache/flink/api/common/operators/Keys.java ---
@@ -183,9 +193,13 @@ public String toString() {
public static final String SELECT_ALL_CHAR = "*";
public static final String SELECT_ALL_CHAR_SCALA = "_";
+ private static final Pattern WILD_CARD_REGEX =
Pattern.compile("[\\.]?("
+ + "\\" + SELECT_ALL_CHAR + "\\B|"
--- End diff --
Can we terminate the patterns with `$` instead of `\b` and `\B`?
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