risingwave_storage::hummock::iterator

Struct NonPkPrefixSkipWatermarkState

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pub struct NonPkPrefixSkipWatermarkState {
    watermarks: BTreeMap<TableId, ReadTableWatermark>,
    remain_watermarks: VecDeque<(TableId, VirtualNode, WatermarkDirection, Datum)>,
    compaction_catalog_agent_ref: CompactionCatalogAgentRef,
    last_serde: Option<(OrderedRowSerde, OrderedRowSerde, usize)>,
    last_table_id: Option<u32>,
}

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§watermarks: BTreeMap<TableId, ReadTableWatermark>§remain_watermarks: VecDeque<(TableId, VirtualNode, WatermarkDirection, Datum)>§compaction_catalog_agent_ref: CompactionCatalogAgentRef§last_serde: Option<(OrderedRowSerde, OrderedRowSerde, usize)>§last_table_id: Option<u32>

Implementations§

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impl NonPkPrefixSkipWatermarkState

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pub fn new( watermarks: BTreeMap<TableId, ReadTableWatermark>, compaction_catalog_agent_ref: CompactionCatalogAgentRef, ) -> Self

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pub fn from_safe_epoch_watermarks( safe_epoch_watermarks: BTreeMap<u32, TableWatermarks>, compaction_catalog_agent_ref: CompactionCatalogAgentRef, ) -> Self

Trait Implementations§

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impl SkipWatermarkState for NonPkPrefixSkipWatermarkState

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fn has_watermark(&self) -> bool

Returns whether there are any unused watermarks in the state.
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fn should_delete(&mut self, key: &FullKey<&[u8]>) -> bool

Returns whether the incoming key needs to be deleted after watermark filtering. Note: Each table_id has multiple watermarks, and state defaults to forward traversal of vnodes, so you must use forward traversal of the incoming key for it to be filtered correctly.
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fn reset_watermark(&mut self)

Resets the watermark state.
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fn advance_watermark(&mut self, key: &FullKey<&[u8]>) -> bool

Determines if the current watermark is exhausted by the passed-in key, advances to the next watermark, and returns whether the key needs to be deleted.

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