Partition

micromegas::analytics::lakehouse::partition

Struct Partition 

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pub struct Partition {
    pub view_metadata: ViewMetadata,
    pub insert_time_range: TimeRange,
    pub event_time_range: Option<TimeRange>,
    pub updated: DateTime<Utc>,
    pub file_path: Option<String>,
    pub file_size: i64,
    pub source_data_hash: Vec<u8>,
    pub num_rows: i64,
}
Expand description

Partition metadata (without embedded file_metadata for performance) Use load_partition_metadata() to load metadata on-demand when needed

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§view_metadata: ViewMetadata

Metadata about the view this partition belongs to.

§insert_time_range: TimeRange

The insert time range for this partition.

§event_time_range: Option<TimeRange>

The event time range for this partition. None for empty partitions.

§updated: DateTime<Utc>

The last time this partition was updated.

§file_path: Option<String>

The path to the Parquet file for this partition. None for empty partitions.

§file_size: i64

The size of the Parquet file in bytes. 0 for empty partitions.

§source_data_hash: Vec<u8>

A hash of the source data that generated this partition.

§num_rows: i64

The number of rows in this partition. 0 for empty partitions.

Implementations§

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impl Partition

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pub fn is_empty(&self) -> bool

Returns true if this partition has no data (num_rows = 0).

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pub fn min_event_time(&self) -> Option<DateTime<Utc>>

Returns the min event time, if this partition has data.

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pub fn max_event_time(&self) -> Option<DateTime<Utc>>

Returns the max event time, if this partition has data.

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pub fn begin_insert_time(&self) -> DateTime<Utc>

Returns the beginning of the insert time range.

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pub fn end_insert_time(&self) -> DateTime<Utc>

Returns the end of the insert time range.

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pub fn validate(&self) -> Result<(), Error>

Validates partition invariants. Returns error if partition is inconsistent.

Invariants:

  • Non-empty partitions (num_rows > 0) MUST have both event_time_range and file_path
  • Empty partitions (num_rows = 0) MUST NOT have event_time_range or file_path
  • num_rows must not be negative

Trait Implementations§

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impl Clone for Partition

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fn clone(&self) -> Partition

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Partition

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

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