influxdata/influxdb · error · Error::Datafusion

datafusion error

Error message

datafusion error: {0}

What it means

This error wraps a DataFusionError raised while executing an InfluxQL query in the IOx v1 query API. The v1 endpoint translates InfluxQL into DataFusion plans; any failure during planning or execution surfaces here with the `#[from]` conversion. It indicates the query itself (or the underlying data/schema it touches) failed inside DataFusion.

Solutions

  1. Inspect the wrapped DataFusionError message ({0}) to find the exact failing plan/execution step.
  2. Verify the measurement/table names in the query exist in the target database (SHOW MEASUREMENTS).
  3. Simplify the InfluxQL statement to isolate which clause DataFusion rejects.
  4. Check for unsupported InfluxQL features and rewrite the query using supported syntax.

Example fix

// before
SELECT mean(temperature) FROM sensor_data GROUP BY invalid_fn(time, 5m)
// after
SELECT mean(temperature) FROM sensor_data GROUP BY time(5m)
Defensive patterns

Strategy: try-catch

Validate before calling

const tables = await listMeasurements(db);
const referenced = /FROM\s+["'`]?([\w.]+)/gi.exec(q);
if (referenced && !tables.includes(referenced[1].split('.').pop())) {
  throw new Error(`measurement ${referenced[1]} does not exist in ${db}`);
}

Type guard

function isDatafusionError(e) {
  return typeof e === 'object' && e !== null && 'message' in e && String(e.message).includes('datafusion error');
}

Try / catch

try {
  await queryV1({ db, q });
} catch (e) {
  if (/datafusion error/.test(e.message)) {
    logDatafusionFailure(e.cause ?? e.message);
  } else {
    throw e;
  }
}

Prevention

When it happens

Trigger: POST/GET to the v1 /query endpoint where the InfluxQL statement is parsed and planned successfully enough to reach DataFusion, but DataFusion's planner or executor rejects it (e.g. invalid function reference, missing table/schema, type error during execution).

Common situations: Querying a measurement (table) that does not exist in the namespace; using InfluxQL functions DataFusion cannot plan; schema mismatches after migration; malformed SHOW queries hitting DataFusion directly.

Understand the failure class

Background: "query failed", "%w: SQL error" — wrapped database query errors in Go libraries explained — this error's family across 3 libraries.

Related errors

AI-assisted analysis of influxdata/influxdb@06200ef96b (2026-09-19). Data as JSON: /api/errors/4c8a9c8c5fb1cf1a. Report an issue: GitHub.

Appendix: source

Thrown at core/iox_v1_query_api/src/error.rs:49

    #[error("error decoding multipart file upload: {0}")]
    MultipartFile(String),

    #[error("Invalid UTF8: {message} {error}")]
    Utf8 {
        message: &'static str,
        error: String,
    },

    /// Serde decode error
    #[error("error decoding params from url: {0}")]
    SerdeUrlDecoding(#[from] serde_urlencoded::de::Error),

    // SerdeJsonError
    #[error("error decoding query body: {0}")]
    SerdeJson(#[from] serde_json::Error),

    #[error("datafusion error: {0}")]
    Datafusion(#[from] DataFusionError),

    #[error("error in InfluxQL statement: {0}")]
    InfluxqlRewrite(#[from] rewrite::Error),

    #[error("must provide only one InfluxQl statement per query")]
    InfluxqlSingleStatement,

    #[error("must specify a 'db' parameter, or provide the database in the InfluxQL query")]
    InfluxqlNoDatabase,

    #[error(
        "provided a database in both the parameters ({param_db}) and \
        query string ({query_db}) that do not match, if providing a query \
        that specifies the database, you can omit the 'database' parameter \
        from your request"
    )]
    InfluxqlDatabaseMismatch { param_db: String, query_db: String },

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