{"record":{"id":"7b4bfb3e3db6832e","repo":"sqlmapproject/sqlmap","slug":"esperanto-could-not-establish-a-reliable-extractio","errorCode":null,"errorMessage":"Esperanto could not establish a reliable extraction oracle on this target (%s)","messagePattern":"Esperanto could not establish a reliable extraction oracle on this target \\((.+?)\\)","errorType":"exception","errorClass":"SqlmapDataException","httpStatus":null,"severity":"error","filePath":"extra/esperanto/handler.py","lineNumber":81,"sourceCode":"                # boolean-blind technique: no marker, no concatenation, whole-page true/false,\n                # works everywhere. only fall back to whatever-technique-is-available if the\n                # target has no usable boolean-blind vector. _ask decides what an undecidable\n                # probe MEANS by context (skip a candidate rung vs degrade a data read loudly).\n                esp = Esperanto(_blindOracle, retries=2)\n                logger.info(\"Esperanto is discovering the back-end SQL dialect (agnostic mode, boolean-blind)\")\n                try:\n                    esp.discover()\n                except RuntimeError:\n                    # no usable boolean-blind vector on this target - retry with any technique\n                    # sqlmap detected (UNION/error/time); may hit the CONCAT limitation above\n                    esp = Esperanto(lambda condition: checkBooleanExpression(condition), retries=2)\n                    logger.info(\"Esperanto retrying discovery via any available inference technique\")\n                    try:\n                        esp.discover()\n                    except RuntimeError as ex:\n                        # genuinely unusable (unstable target, or no substring/pattern\n                        # primitive) - stop cleanly instead of surfacing an internal traceback\n                        raise SqlmapDataException(\"Esperanto could not establish a reliable extraction oracle on this target (%s)\" % ex)\n                logger.info(\"Esperanto dialect verdict: %s\" % (esp.identify().get(\"product\") or \"unknown\"))\n                esp._progress = lambda value: logger.info(\"retrieved: %s\" % _sanitize(value))  # live feedback (sanitized)\n                self._esp = esp\n                self._notesLogged = 0\n                self._flushNotes()                      # discovery-time notes\n            return self._esp\n\n        def _flushNotes(self):\n            # surface degradation notes LOUDLY as they accrue. Enumeration/dump append notes\n            # AFTER discovery, so logging once would hide every runtime degradation (incomplete\n            # listing, truncation, blocked paging) - flush the NEW ones after each operation.\n            notes = self._esp.dialect.notes if self._esp else []\n            for note in notes[self._notesLogged:]:\n                logger.warning(\"Esperanto: %s\" % note)\n            self._notesLogged = len(notes)\n\n        def _scopeDb(self):\n            # the database to scope table/column lookups to: -D if given, else the","sourceCodeStart":63,"sourceCodeEnd":99,"githubUrl":"https://github.com/sqlmapproject/sqlmap/blob/0a35b20e3953d341be6c7ac75ccb0b3362540c8d/extra/esperanto/handler.py#L63-L99","documentation":"Error \"Esperanto could not establish a reliable extraction oracle on this target (%s)\" thrown in sqlmapproject/sqlmap.","triggerScenarios":"Thrown at extra/esperanto/handler.py:81 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"0a35b20e3953d341be6c7ac75ccb0b3362540c8d","analyzedAt":"2026-08-26T23:02:52.002Z","schemaVersion":2},"datasetVersion":"2026-08-27T03:17:27.898Z"}