flyrain commented on code in PR #1314:
URL: https://github.com/apache/polaris/pull/1314#discussion_r2029712057


##########
service/common/src/main/java/org/apache/polaris/service/catalog/policy/PolicyCatalog.java:
##########
@@ -251,25 +248,224 @@ public Policy updatePolicy(
 
   public boolean dropPolicy(PolicyIdentifier policyIdentifier, boolean 
detachAll) {
     // TODO: Implement detachAll when we support attach/detach policy
-    PolarisResolvedPathWrapper resolvedEntities =
+    var resolvedPolicyPath = getResolvedPathWrapper(policyIdentifier);
+    var catalogPath = resolvedPolicyPath.getRawParentPath();
+    var policyEntity = resolvedPolicyPath.getRawLeafEntity();
+
+    return metaStoreManager
+        .dropEntityIfExists(
+            callContext.getPolarisCallContext(),
+            PolarisEntity.toCoreList(catalogPath),
+            policyEntity,
+            Map.of(),
+            false)
+        .isSuccess();
+  }
+
+  public boolean attachPolicy(
+      PolicyIdentifier policyIdentifier,
+      PolicyAttachmentTarget target,
+      Map<String, String> parameters) {
+
+    var resolvedPolicyPath = getResolvedPathWrapper(policyIdentifier);
+    var policyCatalogPath = 
PolarisEntity.toCoreList(resolvedPolicyPath.getRawParentPath());
+    var policyEntity = PolicyEntity.of(resolvedPolicyPath.getRawLeafEntity());
+
+    var resolvedTargetPath = getResolvedPathWrapper(target);
+    var targetCatalogPath = 
PolarisEntity.toCoreList(resolvedTargetPath.getRawParentPath());
+    var targetEntity = resolvedTargetPath.getRawLeafEntity();
+
+    PolicyValidators.validateAttach(policyEntity, targetEntity);
+
+    var result =
+        metaStoreManager.attachPolicyToEntity(
+            callContext.getPolarisCallContext(),
+            targetCatalogPath,
+            targetEntity,
+            policyCatalogPath,
+            policyEntity,
+            parameters);
+
+    if (result.getReturnStatus() == 
POLICY_MAPPING_OF_SAME_TYPE_ALREADY_EXISTS) {
+      var targetId = catalogEntity.getName();
+      if (target.getType() != CATALOG) {
+        targetId += "." + String.join(".", target.getPath());
+      }
+      throw new PolicyMappingAlreadyExistsException(

Review Comment:
   Done in the new commit.



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