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Environment variables

Polars

Variable Description
POLARS_ALLOW_PQ_EMPTY_STRUCT Allows reading or writing Parquet files that contain empty struct fields that are otherwise rejected.
POLARS_SKIP_DSL_HASH_VERIFICATION Skips internal DSL schema/hash compatibility checks between polars-cloud client and polars-on-premises binary.
Set to 1 only in controlled environments when working around temporary DSL hash mismatches.
POLARS_TEMP_DIR Override the default temporary directory Polars uses for scratch files and some I/O operations.

You may also set any Polars OSS-recognized environment variables.

Polars on-premises

Variable Description
OTLP_ENDPOINT Target endpoint for sending OTLP traces/metrics/logs to your OpenTelemetry collector/observability stack.
e.g. http://otel-collector:4317.
OTEL_SERVICE_INSTANCE_ID OpenTelemetry service.instance.id that uniquely identifies this cublet instance in telemetry.
Must match cublet_id.
PLC_LOG_LEVEL Controls logging verbosity for the Polars on-premises components (e.g. scheduler/worker).
e.g. Info, Debug, Trace, etc. (follows the Rust naming).