{"record":{"id":"795609a42f737598","repo":"influxdata/influxdb","slug":"field-not-found-in-table-buffer-0","errorCode":null,"errorMessage":"Field not found in table buffer: {0}","messagePattern":"Field not found in table buffer: (.+?)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"influxdb3_write/src/write_buffer/table_buffer.rs","lineNumber":29,"sourceCode":"use arrow::record_batch::RecordBatch;\nuse data_types::TimestampMinMax;\nuse hashbrown::{HashMap, HashSet};\nuse influxdb3_catalog::catalog::{TableDefinition, legacy};\nuse influxdb3_id::ColumnId;\nuse influxdb3_wal::{FieldData, Row};\nuse schema::{InfluxColumnType, InfluxFieldType, Schema, SchemaBuilder};\nuse std::collections::BTreeMap;\nuse std::collections::btree_map::Entry;\nuse std::mem::size_of;\nuse std::ops::Range;\nuse std::sync::Arc;\nuse thiserror::Error;\n\nuse crate::ChunkFilter;\n\n#[derive(Debug, Error)]\npub enum Error {\n    #[error(\"Field not found in table buffer: {0}\")]\n    FieldNotFound(String),\n\n    #[error(\"Error creating record batch: {0}\")]\n    RecordBatchError(#[from] arrow::error::ArrowError),\n\n    #[error(\"row range {start}..{end} is out of bounds for a chunk of {row_count} rows\")]\n    RowRangeOutOfBounds {\n        start: usize,\n        end: usize,\n        row_count: usize,\n    },\n}\n\npub(crate) type Result<T, E = Error> = std::result::Result<T, E>;\n\n#[derive(Default)]\npub struct TableBuffer {\n    chunk_time_to_chunks: BTreeMap<i64, ChunkTimeBuffer>,","sourceCodeStart":11,"sourceCodeEnd":47,"githubUrl":"https://github.com/influxdata/influxdb/blob/06200ef96ba82c5f6727e5038a83af8e722c6875/influxdb3_write/src/write_buffer/table_buffer.rs#L11-L47","documentation":"This error is thrown by the in-memory table buffer in influxdb3_write when a caller requests a field by name that does not exist in the buffer's field set. It surfaces from lookup/accessor APIs on TableBuffer (e.g. retrieving a column/field to build Arrow data). It is a lookup failure: the requested field name is misspelled, was never written, or was dropped from the buffer.","triggerScenarios":"Calling a TableBuffer method that resolves a field by name (e.g. field lookup before record-batch creation or chunk reads) with a field name that is absent from the buffer's schema — typically a misspelled column name, a field that was never written for that table, or a name queried after the field was removed from the schema.","commonSituations":"Typos in field names when querying chunks; schema drift where the writer stopped emitting a field before a reader still expects it; case-sensitivity mismatches (Line Protocol fields are case-sensitive); code written against an older table schema that has since changed.","solutions":["Print or inspect the buffer's schema (the buffer's Arrow schema / field list) and compare against the requested name; fix any typo or casing mismatch.","Verify the field was actually written for this table before reading it — check the write path / Line Protocol payload.","Handle the absent field gracefully: check membership in the schema before lookup and return an empty/null column instead of erroring.","If the field was intentionally removed, update the reader/query code to the current schema."],"exampleFix":"// before\nlet col = buffer.field(\"temp\").map_err(Error::FieldNotFound)?;\n\n// after\nlet col = match buffer.field(\"temperature\") {\n    Some(c) => c,\n    None => return Err(Error::FieldNotFound(\"temperature\".to_string())), // or treat as empty column\n};","handlingStrategy":"validation","validationCode":"let field_name = \"temperature\";\nif buffer.schema().fields().iter().all(|f| f.name() != field_name) {\n    // field absent: skip, default, or return an empty column instead of calling the lookup\n}","typeGuard":"fn has_field(schema: &arrow::datatypes::SchemaRef, name: &str) -> bool {\n    schema.field_with_name(name).is_ok()\n}","tryCatchPattern":"match buffer.field(name) {\n    Ok(col) => use_column(col),\n    Err(Error::FieldNotFound(f)) => log::warn(\"missing field {f}, using default\"),\n    Err(e) => return Err(e),\n}","preventionTips":["Always derive field names from the buffer's schema rather than hardcoding string literals.","Validate requested field lists against the schema at query-planning time, before touching buffers.","Remember Line Protocol field names are case-sensitive; normalize consistently at ingest."],"tags":["rust","arrow","schema","lookup-failed"],"backgroundTag":"record-not-found","analyzedSha":"06200ef96ba82c5f6727e5038a83af8e722c6875","analyzedAt":"2026-09-19T12:55:30.003Z","contentChangedAt":"2026-09-19T12:55:30.003Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}