Fix performance bug with large number of unnamed parameters

Fedorov, Mikhail · Fedorov, Mikhail · commit abb3b68cf8a2 · 2025-05-01T03:02:55.000+03:00
On some occasions where col in (:args) contain a really lot args, 10k+ for instance, this commit fixes a performance (high CPU) bug by NOT traversing the whole map in basically O(n^2) manner

Signed-off-by: Mikhail Fedorov &lt;mfedorov761@gmail.com&gt;
diff --git a/spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/convert/QueryMapperUnitTests.java b/spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/convert/QueryMapperUnitTests.java
@@ -46,6 +46,7 @@
  *
  * @author Mark Paluch
  * @author Jens Schauder
+ * @author Mikhail Fedorov
  */
 public class QueryMapperUnitTests {
 

Original file line number	Diff line number	Diff line change
`@@ -46,6 +46,7 @@`
`46`	`46`	`*`
`47`	`47`	`* @author Mark Paluch`
`48`	`48`	`* @author Jens Schauder`
	`49`	`+ * @author Mikhail Fedorov`
`49`	`50`	`*/`
`50`	`51`	`public class QueryMapperUnitTests {`
`51`	`52`