{"record":{"id":"f6e9330a69605801","repo":"dgraph-io/dgraph","slug":"error-interpreting-appropriate-type-for-v","errorCode":null,"errorMessage":"error interpreting appropriate type for %v","messagePattern":"error interpreting appropriate type for (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"query/query.go","lineNumber":436,"sourceCode":"func isEmptyIneqFnWithVar(sg *SubGraph) bool {\n\treturn sg.SrcFunc != nil && isInequalityFn(sg.SrcFunc.Name) && len(sg.SrcFunc.Args) == 0 &&\n\t\tlen(sg.Params.NeedsVar) > 0\n}\n\n// convert from task.Val to types.Value, based on schema appropriate type\n// is already set in api.Value\nfunc convertWithBestEffort(tv *pb.TaskValue, attr string) (types.Val, error) {\n\t// value would be in binary format with appropriate type\n\ttid := types.TypeID(tv.ValType)\n\tif !tid.IsScalar() {\n\t\treturn types.Val{}, errors.Errorf(\"Leaf predicate:'%v' must be a scalar.\", attr)\n\t}\n\n\t// creates appropriate type from binary format\n\tsv, err := types.Convert(types.Val{Tid: types.BinaryID, Value: tv.Val}, tid)\n\tif err != nil {\n\t\t// This can happen when a mutation ingests corrupt data into the database.\n\t\treturn types.Val{}, errors.Wrapf(err, \"error interpreting appropriate type for %v\", attr)\n\t}\n\treturn sv, nil\n}\n\nfunc mathCopy(dst *mathTree, src *dql.MathTree) error {\n\t// Either we'll have an operation specified, or the function specified.\n\tdst.Const = src.Const\n\tdst.Fn = src.Fn\n\tdst.Val = src.Val\n\tdst.Var = src.Var\n\n\tfor _, mc := range src.Child {\n\t\tchild := &mathTree{}\n\t\tif err := mathCopy(child, mc); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tdst.Child = append(dst.Child, child)\n\t}","sourceCodeStart":418,"sourceCodeEnd":454,"githubUrl":"https://github.com/dgraph-io/dgraph/blob/759e242be62c91f8d084da06ad0c8d21256d9c07/query/query.go#L418-L454","documentation":"After confirming the value is scalar, convertWithBestEffort uses types.Convert to turn the binary-stored value into the schema type. If that conversion fails, the error is wrapped with \"error interpreting appropriate type for %v\" — this indicates data in the database cannot be decoded as the declared schema type (corrupt or mismatched data from a mutation).","triggerScenarios":"types.Convert fails decoding tv.Val from BinaryID into the schema type — e.g. a mutation wrote bytes that don't parse as the predicate's declared type (bad datetime, invalid number, malformed geo).","commonSituations":"Corrupt data ingested via bad mutations, bulk loader edge cases, or schema changed to a type incompatible with existing stored values.","solutions":["Find and fix the corrupt node value for the predicate (re-mutate with a correct value)","Verify the predicate's schema type matches the data actually written","Re-import/re-ingest the affected data after correcting the writer"],"exampleFix":"// before\n{\"set\": [{\"uid\": \"0x1\", \"age\": \"not-a-number\"}]}\n// after\n{\"set\": [{\"uid\": \"0x1\", \"age\": 30}]} // matches age: int schema","handlingStrategy":"try-catch","validationCode":"// Go: validate value encodes to schema type before mutation\nif _, err := types.Convert(types.Val{Tid: tid, Value: v}, tid); err != nil {\n    return fmt.Errorf(\"value %v not convertible to %v for %s\", v, tid, attr)\n}","typeGuard":null,"tryCatchPattern":"val, err := convertWithBestEffort(tv, attr)\nif err != nil && strings.Contains(err.Error(), \"error interpreting appropriate type\") {\n    log.Warnf(\"corrupt value for %s: %v\", attr, err)\n    // skip node / re-ingest data\n    return skipNode(attr)\n}","preventionTips":["Validate input types in mutations before writing","After schema changes, check stored values still convert","Monitor for this error as a signal of data corruption and re-ingest affected data"],"tags":["dgraph","types","corrupt-data","conversion"],"backgroundTag":"value-type-conversion-failed","analyzedSha":"759e242be62c91f8d084da06ad0c8d21256d9c07","analyzedAt":"2026-09-01T14:42:12.034Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}