solomax commented on code in PR #208:
URL: https://github.com/apache/openjpa/pull/208#discussion_r4220195515
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openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/exps/MatchesExpression.java:
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@@ -113,12 +113,22 @@ public void appendTo(Select sel, ExpContext ctx, ExpState
state,
// escape out characters by using the database's escape sequence
DBDictionary dict = ctx.store.getDBDictionary();
- if (_escape != null) {
+ // an empty escape character means the same as none at all; the
+ // JPQL grammar accepts ESCAPE '' and some databases reject it
+ if (_escape != null && !_escape.isEmpty()) {
Review Comment:
Maybe we have some helper for this? :)
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