davidradl commented on code in PR #79:
URL: 
https://github.com/apache/flink-connector-jdbc/pull/79#discussion_r1446523771


##########
flink-connector-jdbc/src/main/java/org/apache/flink/connector/jdbc/table/JdbcRowDataLookupFunction.java:
##########
@@ -92,9 +103,22 @@ public JdbcRowDataLookupFunction(
                                 })
                         .toArray(DataType[]::new);
         this.maxRetryTimes = maxRetryTimes;
-        this.query =
+
+        final String baseSelectStatement =
                 options.getDialect()
                         .getSelectFromStatement(options.getTableName(), 
fieldNames, keyNames);
+        if (conditions == null || conditions.length == 0) {
+            this.query = baseSelectStatement;
+            if (LOG.isDebugEnabled()) {

Review Comment:
   log4jLogger does check for debug, but other Logger implementations may not . 
I see this method is used extensively in core Flink - I am inclined to leave it 
in, it means the parameters are not formatted when debug is not on. WDYT 
@libenchao 



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