Github user kliewkliew commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/208#discussion_r78300203
--- Diff:
phoenix-core/src/main/java/org/apache/phoenix/compile/ExpressionCompiler.java
---
@@ -523,7 +523,12 @@ public Expression visitLeave(LikeParseNode node,
List<Expression> children) thro
byte[] wildcard = {StringUtil.MULTI_CHAR_LIKE};
StringUtil.fill(nullExpressionString, 0, pattern.length(),
wildcard, 0, 1, false);
if (pattern.equals(new String (nullExpressionString))) {
- return IsNullExpression.create(lhs, true,
context.getTempPtr());
--- End diff --
I made the suggested changes and added test coverage to confirm that `NULL
like '%'` returns NULL. JDBC `getBoolean` transforms NULL to false but they
provide a `wasNull` method that I used to verify the test cases.
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