{"record":{"id":"3543c379497816c9","repo":"jackc/pgx","slug":"result-format-codes-length-d-does-not-match-field","errorCode":null,"errorMessage":"result format codes length %d does not match field count %d","messagePattern":"result format codes length (.+?) does not match field count (.+?)","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pgconn/pgconn.go","lineNumber":3074,"sourceCode":"\t\t\toutputFields[i] = inputFields[i]\n\t\t\toutputFields[i].Format = pgtype.TextFormatCode\n\t\t}\n\tcase len(resultFormats) == 1:\n\t\t// Single format code applies to all columns.\n\t\tformat := resultFormats[0]\n\t\tfor i := range inputFields {\n\t\t\toutputFields[i] = inputFields[i]\n\t\t\toutputFields[i].Format = format\n\t\t}\n\tcase len(resultFormats) == len(inputFields):\n\t\t// One format code per column.\n\t\tfor i := range inputFields {\n\t\t\toutputFields[i] = inputFields[i]\n\t\t\toutputFields[i].Format = resultFormats[i]\n\t\t}\n\tdefault:\n\t\t// This should not occur if Bind validation is correct, but handle gracefully\n\t\treturn fmt.Errorf(\"result format codes length %d does not match field count %d\", len(resultFormats), len(inputFields))\n\t}\n\n\treturn nil\n}\n","sourceCodeStart":3056,"sourceCodeEnd":3079,"githubUrl":"https://github.com/jackc/pgx/blob/ec1a0befd22592cffffdeeb0a50311b506372f4c/pgconn/pgconn.go#L3056-L3079","documentation":"The number of result format codes supplied for a statement does not match the number of result columns and is not 0 or 1 (which apply universally). This is an internal consistency check between Bind-time validation and RowDescription.","triggerScenarios":"Thrown at pgconn/pgconn.go:3074 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Verify the number of format codes matches the column count","Use a single format code to apply to all columns","Use zero format codes to use defaults","Report as a bug if using the public API correctly"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"ec1a0befd22592cffffdeeb0a50311b506372f4c","analyzedAt":"2026-08-04T22:52:11.263Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}