gaurav726 commented on a change in pull request #17754:
URL: https://github.com/apache/flink/pull/17754#discussion_r749949235
##########
File path:
flink-connectors/flink-connector-jdbc/src/main/java/org/apache/flink/connector/jdbc/table/JdbcRowDataLookupFunction.java
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@@ -146,10 +148,12 @@ public void eval(Object... keys) {
if (cache != null) {
List<RowData> cachedRows = cache.getIfPresent(keyRow);
if (cachedRows != null) {
- for (RowData cachedRow : cachedRows) {
- collect(cachedRow);
+ if (!cachedRows.isEmpty() || !excludeEmptyQueryResult) {
+ for (RowData cachedRow : cachedRows) {
Review comment:
@wenlong88 added test cases, please review
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