[Developer] #567 filter recent SQL cursors in Java

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

@@ -45,6 +45,7 @@ public class OrdsProbeService {
   private static final TypeReference<Map<String, Object>> MAP_TYPE = new TypeReference<>() {
   };
   private static final Logger log = LoggerFactory.getLogger(OrdsProbeService.class);
+  private static final int EXECUTION_EVIDENCE_LOOKBACK_MINUTES = 15;
 
   private record ExecutionEvidenceLookup(
       SqlExecutionEvidence evidence,
@@ -52,6 +53,18 @@ public class OrdsProbeService {
   ) {
   }
 
+  private record RecentSqlCursor(
+      String sqlId,
+      int childNumber,
+      String sqlFulltext,
+      String lastActiveAt,
+      long executions,
+      long rowsProcessed,
+      long elapsedMillis,
+      long bufferGets
+  ) {
+  }
+
   private final BearerTokenService tokenService;
   private final ProtectedObjectService protectedObjectService;
   private final AuditService auditService;
@@ -260,8 +273,8 @@ public class OrdsProbeService {
                   + "V$SQL과 DBMS_XPLAN은 일반 데이터 접근과 별도인 SYS 진단 권한입니다.");
         }
         return result.withExecutionEvidence(null,
-            "최근 2분 내 이 보호 대상의 실행 cursor를 찾지 못했습니다. "
-                + "해당 ORDS 요청이 DB까지 실행됐는지 확인하세요.");
+            "최근 15분의 최신 실행 cursor 10건에서 이 보호 대상을 찾지 못했습니다. "
+                + "ORDS 응답 지연 또는 shared pool 교체로 증적이 남지 않았을 수 있습니다.");
       }
       String message = evidence.hasPredicatePlan() ? null
           : "SQL_ID는 찾았지만 DBMS_XPLAN Predicate Information을 읽지 못했습니다. "
@@ -299,9 +312,7 @@ public class OrdsProbeService {
       JdbcTemplate evidenceJdbcTemplate,
       ProtectedObject object
   ) {
-    String marker = "%FROM%" + object.owner().toUpperCase(Locale.ROOT)
-        + "." + object.objectName().toUpperCase(Locale.ROOT) + "%";
-    return evidenceJdbcTemplate.query("""
+    List<RecentSqlCursor> candidates = evidenceJdbcTemplate.query("""
         SELECT sql_id,
                child_number,
                sql_fulltext,
@@ -320,31 +331,49 @@ public class OrdsProbeService {
                  elapsed_time,
                  buffer_gets
           FROM v$sql
-          WHERE UPPER(sql_text) LIKE ?
-            AND last_active_time >= SYSTIMESTAMP - INTERVAL '2' MINUTE
+          WHERE last_active_time >= SYSTIMESTAMP - NUMTODSINTERVAL(?, 'MINUTE')
           ORDER BY last_active_time DESC
         )
-        WHERE ROWNUM = 1
-        """, resultSet -> {
-      if (!resultSet.next()) {
-        return null;
-      }
-      String sqlId = resultSet.getString("sql_id");
-      int childNumber = resultSet.getInt("child_number");
-      String predicatePlan = findPredicatePlan(evidenceJdbcTemplate, sqlId, childNumber);
-      return new SqlExecutionEvidence(
-          sqlId,
-          childNumber,
-          resultSet.getString("sql_fulltext"),
-          resultSet.getTimestamp("last_active_time") == null
-              ? null : resultSet.getTimestamp("last_active_time").toLocalDateTime().toString(),
-          resultSet.getLong("executions"),
-          resultSet.getLong("rows_processed"),
-          Math.round(resultSet.getLong("elapsed_time") / 1000.0d),
-          resultSet.getLong("buffer_gets"),
-          predicatePlan
-      );
-    }, marker);
+        WHERE ROWNUM <= 10
+        """, (resultSet, rowNum) -> new RecentSqlCursor(
+        resultSet.getString("sql_id"),
+        resultSet.getInt("child_number"),
+        resultSet.getString("sql_fulltext"),
+        resultSet.getTimestamp("last_active_time") == null
+            ? null : resultSet.getTimestamp("last_active_time").toLocalDateTime().toString(),
+        resultSet.getLong("executions"),
+        resultSet.getLong("rows_processed"),
+        Math.round(resultSet.getLong("elapsed_time") / 1000.0d),
+        resultSet.getLong("buffer_gets")
+    ), EXECUTION_EVIDENCE_LOOKBACK_MINUTES);
+
+    return candidates.stream()
+        .filter(candidate -> referencesProtectedObject(candidate.sqlFulltext(), object))
+        .findFirst()
+        .map(candidate -> new SqlExecutionEvidence(
+            candidate.sqlId(),
+            candidate.childNumber(),
+            candidate.sqlFulltext(),
+            candidate.lastActiveAt(),
+            candidate.executions(),
+            candidate.rowsProcessed(),
+            candidate.elapsedMillis(),
+            candidate.bufferGets(),
+            findPredicatePlan(evidenceJdbcTemplate, candidate.sqlId(), candidate.childNumber())
+        ))
+        .orElse(null);
+  }
+
+  static boolean referencesProtectedObject(String sqlFulltext, ProtectedObject object) {
+    if (sqlFulltext == null || object == null) {
+      return false;
+    }
+    String normalizedSql = sqlFulltext.toUpperCase(Locale.ROOT)
+        .replace("\"", "")
+        .replaceAll("\\s+", "");
+    String objectName = (object.owner() + "." + object.objectName())
+        .toUpperCase(Locale.ROOT);
+    return normalizedSql.contains(objectName);
   }
 
   private String findPredicatePlan(