[Developer] #567 clarify SQL evidence privilege status

src/main/java/com/cloudhandson/vpdbackoffice/service/OrdsProbeService.java

@@ -46,6 +46,12 @@ public class OrdsProbeService {
   };
   private static final Logger log = LoggerFactory.getLogger(OrdsProbeService.class);
 
+  private record ExecutionEvidenceLookup(
+      SqlExecutionEvidence evidence,
+      boolean sqlCatalogAccessUnavailable
+  ) {
+  }
+
   private final BearerTokenService tokenService;
   private final ProtectedObjectService protectedObjectService;
   private final AuditService auditService;
@@ -248,11 +254,17 @@ public class OrdsProbeService {
    */
   private ProbeResult attachRecentExecutionEvidence(ProbeResult result, ProtectedObject object) {
     try {
-      SqlExecutionEvidence evidence = findRecentExecutionEvidence(object);
+      ExecutionEvidenceLookup lookup = findRecentExecutionEvidence(object);
+      SqlExecutionEvidence evidence = lookup.evidence();
       if (evidence == null) {
+        if (lookup.sqlCatalogAccessUnavailable()) {
+          return result.withExecutionEvidence(null,
+              "SQL_ID 실행 증적을 수집할 권한이 없습니다. 현재 권한 검증 결과는 정상입니다. "
+                  + "DBA에게 ORDS 실행 계정의 V$SQL 및 DBMS_XPLAN 조회 권한을 요청하세요.");
+        }
         return result.withExecutionEvidence(null,
-            "최근 2분 내 이 보호 대상의 SQL_ID를 shared pool에서 찾지 못했습니다. "
-                + "ORDS 실행 계정의 V$SQL 보존 시간과 대상 SQL을 확인하세요.");
+            "최근 2분 내 이 보호 대상의 실행 cursor를 찾지 못했습니다. "
+                + "해당 ORDS 요청이 DB까지 실행됐는지 확인하세요.");
       }
       String message = evidence.hasPredicatePlan() ? null
           : "SQL_ID는 찾았지만 DBMS_XPLAN Predicate Information을 읽지 못했습니다. "
@@ -266,17 +278,37 @@ public class OrdsProbeService {
     }
   }
 
-  private SqlExecutionEvidence findRecentExecutionEvidence(ProtectedObject object) {
+  private ExecutionEvidenceLookup findRecentExecutionEvidence(ProtectedObject object) {
     JdbcTemplate evidenceJdbcTemplate = ordsMetadataService.executionEvidenceJdbcTemplate();
+    boolean sqlCatalogAccessUnavailable = false;
     try {
       SqlExecutionEvidence evidence = findRecentExecutionEvidence(evidenceJdbcTemplate, object);
       if (evidence != null || evidenceJdbcTemplate == jdbcTemplate) {
-        return evidence;
+        return new ExecutionEvidenceLookup(evidence, false);
       }
     } catch (RuntimeException exception) {
+      sqlCatalogAccessUnavailable = isSqlCatalogAccessUnavailable(exception);
       log.debug("ORDS parsing-schema cursor evidence is unavailable: {}", exception.getMessage());
     }
-    return findRecentExecutionEvidence(jdbcTemplate, object);
+    try {
+      return new ExecutionEvidenceLookup(
+          findRecentExecutionEvidence(jdbcTemplate, object), sqlCatalogAccessUnavailable);
+    } catch (RuntimeException exception) {
+      log.debug("Backoffice cursor evidence is unavailable: {}", exception.getMessage());
+      return new ExecutionEvidenceLookup(null,
+          sqlCatalogAccessUnavailable || isSqlCatalogAccessUnavailable(exception));
+    }
+  }
+
+  private boolean isSqlCatalogAccessUnavailable(RuntimeException exception) {
+    String message = exception.getMessage();
+    if (message == null) {
+      return false;
+    }
+    String normalized = message.toUpperCase(Locale.ROOT);
+    return normalized.contains("ORA-00942")
+        || normalized.contains("V_$SQL")
+        || normalized.contains("V$SQL");
   }
 
   private SqlExecutionEvidence findRecentExecutionEvidence(