Add New Index IDX_RL_SRCPATH_TGTURL To HFJ_RES_LINK Table (#7224)

Author: KevinDougan

hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/8_6_0/7223-add-new-index-to-hfj-res-link.yaml

@@ -0,0 +1,4 @@
+---
+type: add
+issue: 7223
+title: "Add a new DB Index to the HFJ_RES_LINK Table called IDX_RL_SRCPATH_TGTURL to avoid Full Table Scans for certain queries."

hapi-fhir-jpaserver-base/src/main/java/ca/uhn/fhir/jpa/migrate/tasks/HapiFhirJpaMigrationTasks.java

@@ -130,6 +130,19 @@ public HapiFhirJpaMigrationTasks(Set<String> theFlags) {
 		init780();
 		init820();
 		init840();
+		init860();
+	}
+
+	protected void init860() {
+		Builder version = forVersion(VersionEnum.V8_6_0);
+		// Add IDX_RL_SRCPATH_TGTURL to the HFJ_RES_LINK Table - HAPI-FHIR #7223
+		{
+			version.onTable("HFJ_RES_LINK")
+					.addIndex("20250827.01", "IDX_RL_SRCPATH_TGTURL")
+					.unique(false)
+					.withColumns("SRC_PATH, TARGET_RESOURCE_URL, PARTITION_ID, SRC_RESOURCE_ID")
+					.heavyweightSkipByDefault();
+		}
 	}
 
 	protected void init840() {

hapi-fhir-jpaserver-model/src/main/java/ca/uhn/fhir/jpa/model/entity/ResourceLink.java

@@ -61,7 +61,11 @@
 			// in separate block.
 			@Index(
 					name = "IDX_RL_TGT_v2",
-					columnList = "TARGET_RESOURCE_ID, SRC_PATH, SRC_RESOURCE_ID, TARGET_RESOURCE_TYPE,PARTITION_ID")
+					columnList = "TARGET_RESOURCE_ID, SRC_PATH, SRC_RESOURCE_ID, TARGET_RESOURCE_TYPE,PARTITION_ID"),
+			// See https://github.com/hapifhir/hapi-fhir/issues/7223
+			@Index(
+					name = "IDX_RL_SRCPATH_TGTURL",
+					columnList = "SRC_PATH, TARGET_RESOURCE_URL, PARTITION_ID, SRC_RESOURCE_ID")
 		})
 @IdClass(IdAndPartitionId.class)
 public class ResourceLink extends BaseResourceIndex {