risingwave_connector::source::base

Enum BackfillInfo

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pub enum BackfillInfo {
    HasDataToBackfill {
        latest_offset: String,
    },
    NoDataToBackfill,
}
Expand description

Information used to determine whether we should start and finish source backfill.

XXX: if a connector cannot provide the latest offsets (but we want to make it shareable), perhaps we should ban blocking DDL for it.

Variants§

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HasDataToBackfill

Fields

§latest_offset: String

The last available offsets for each split (inclusive).

This will be used to determine whether source backfill is finished when there are no new messages coming from upstream SourceExecutor. Otherwise, blocking DDL cannot finish until new messages come.

When there are upstream messages, we will use the latest offsets from the upstream.

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NoDataToBackfill

If there are no messages in the split at all, we don’t need to start backfill. In this case, there will be no message from the backfill stream too. If we started backfill, we cannot finish it until new messages come. So we mark this a special case for optimization.

Trait Implementations§

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impl Clone for BackfillInfo

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fn clone(&self) -> BackfillInfo

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

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

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

Formats the value using the given formatter. Read more

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