{"record":{"id":"4e4ddac35b4dcfe7","repo":"pathwaycom/pathway","slug":"table-interpolate-invalid-column-reference-for-4e4dda","errorCode":null,"errorMessage":"Table.interpolate(): Invalid column reference for the parameter timestamp.","messagePattern":"Table\\.interpolate\\(\\): Invalid column reference for the parameter timestamp\\.","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"python/pathway/stdlib/statistical/_interpolate.py","lineNumber":117,"sourceCode":"    4         | 4.0      | 40.0\n    5         | 5.0      | 50.0\n    6         | 6.0      | 60.0\n    \"\"\"\n\n    if mode != InterpolateMode.LINEAR:\n        raise ValueError(\n            \"\"\"interpolate: Invalid mode. Only Interpolate.LINEAR is currently available.\"\"\"\n        )\n\n    if isinstance(timestamp, pw.ColumnReference):\n        timestamp = self[timestamp]\n    else:\n        if isinstance(timestamp, str):\n            raise ValueError(\n                \"Table.interpolate(): Invalid column reference for the parameter timestamp,\"\n                + f\" found a string. Did you mean this.{timestamp} instead of {repr(timestamp)}?\"\n            )\n        raise ValueError(\n            \"Table.interpolate(): Invalid column reference for the parameter timestamp.\"\n        )\n\n    ordered_table = self.sort(key=timestamp)\n\n    table = self\n\n    for value in values:\n        if isinstance(value, pw.ColumnReference):\n            value = self[value]\n        else:\n            if isinstance(value, str):\n                raise ValueError(\n                    \"Table.interpolate(): Invalid column reference for the parameter value,\"\n                    + f\" found a string. Did you mean this.{value} instead of {repr(value)}?\"\n                )\n            raise ValueError(\n                \"Table.interpolate(): Invalid column reference for the parameter value.\"","sourceCodeStart":99,"sourceCodeEnd":135,"githubUrl":"https://github.com/pathwaycom/pathway/blob/fa2f74a4649b7c5908690cf60137263d8d80de5f/python/pathway/stdlib/statistical/_interpolate.py#L99-L135","documentation":"Error \"Table.interpolate(): Invalid column reference for the parameter timestamp.\" thrown in pathwaycom/pathway.","triggerScenarios":"Thrown at python/pathway/stdlib/statistical/_interpolate.py:117 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Pass a ColumnReference for the timestamp parameter of Table.interpolate()."],"exampleFix":"t.interpolate(this.timestamp, this.value)","handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"fa2f74a4649b7c5908690cf60137263d8d80de5f","analyzedAt":"2026-08-15T01:48:17.006Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}