pub(crate) struct ScanRegion {
version: Arc<Version>,
access_layer: AccessLayerRef,
request: ScanRequest,
cache_strategy: CacheStrategy,
parallel_scan_channel_size: usize,
ignore_inverted_index: bool,
ignore_fulltext_index: bool,
ignore_bloom_filter: bool,
start_time: Option<Instant>,
}
Expand description
Helper to scans a region by ScanRequest.
ScanRegion collects SSTs and memtables to scan without actually reading them. It creates a Scanner to actually scan these targets in Scanner::scan().
Fields§
§version: Arc<Version>
Version of the region at scan.
access_layer: AccessLayerRef
Access layer of the region.
request: ScanRequest
Scan request.
cache_strategy: CacheStrategy
Cache.
parallel_scan_channel_size: usize
Capacity of the channel to send data from parallel scan tasks to the main task.
ignore_inverted_index: bool
Whether to ignore inverted index.
ignore_fulltext_index: bool
Whether to ignore fulltext index.
ignore_bloom_filter: bool
Whether to ignore bloom filter.
start_time: Option<Instant>
Start time of the scan task.
Implementations§
Source§impl ScanRegion
impl ScanRegion
Sourcepub(crate) fn new(
version: Arc<Version>,
access_layer: AccessLayerRef,
request: ScanRequest,
cache_strategy: CacheStrategy,
) -> ScanRegion
pub(crate) fn new( version: Arc<Version>, access_layer: AccessLayerRef, request: ScanRequest, cache_strategy: CacheStrategy, ) -> ScanRegion
Creates a ScanRegion.
Sourcepub(crate) fn with_parallel_scan_channel_size(
self,
parallel_scan_channel_size: usize,
) -> Self
pub(crate) fn with_parallel_scan_channel_size( self, parallel_scan_channel_size: usize, ) -> Self
Sets parallel scan task channel size.
Sourcepub(crate) fn with_ignore_inverted_index(self, ignore: bool) -> Self
pub(crate) fn with_ignore_inverted_index(self, ignore: bool) -> Self
Sets whether to ignore inverted index.
Sourcepub(crate) fn with_ignore_fulltext_index(self, ignore: bool) -> Self
pub(crate) fn with_ignore_fulltext_index(self, ignore: bool) -> Self
Sets whether to ignore fulltext index.
Sourcepub(crate) fn with_ignore_bloom_filter(self, ignore: bool) -> Self
pub(crate) fn with_ignore_bloom_filter(self, ignore: bool) -> Self
Sets whether to ignore bloom filter.
pub(crate) fn with_start_time(self, now: Instant) -> Self
Sourcepub(crate) fn region_scanner(self) -> Result<RegionScannerRef>
pub(crate) fn region_scanner(self) -> Result<RegionScannerRef>
Returns a [RegionScanner] to scan the region.
Sourcepub(crate) fn unordered_scan(self) -> Result<UnorderedScan>
pub(crate) fn unordered_scan(self) -> Result<UnorderedScan>
Unordered scan.
Sourcefn use_unordered_scan(&self) -> bool
fn use_unordered_scan(&self) -> bool
Returns true if the region can use unordered scan for current request.
Sourcefn scan_input(self, filter_deleted: bool) -> Result<ScanInput>
fn scan_input(self, filter_deleted: bool) -> Result<ScanInput>
Creates a scan input.
Sourcefn build_time_range_predicate(&self) -> TimestampRange
fn build_time_range_predicate(&self) -> TimestampRange
Build time range predicate from filters.
Sourcefn maybe_remove_field_filters(&mut self)
fn maybe_remove_field_filters(&mut self)
Remove field filters if the merge mode is MergeMode::LastNonNull.
Sourcefn build_invereted_index_applier(&self) -> Option<Arc<InvertedIndexApplier>>
fn build_invereted_index_applier(&self) -> Option<Arc<InvertedIndexApplier>>
Use the latest schema to build the inverted index applier.
Sourcefn build_bloom_filter_applier(&self) -> Option<Arc<BloomFilterIndexApplier>>
fn build_bloom_filter_applier(&self) -> Option<Arc<BloomFilterIndexApplier>>
Use the latest schema to build the bloom filter index applier.
Sourcefn build_fulltext_index_applier(&self) -> Option<Arc<FulltextIndexApplier>>
fn build_fulltext_index_applier(&self) -> Option<Arc<FulltextIndexApplier>>
Use the latest schema to build the fulltext index applier.
Auto Trait Implementations§
impl Freeze for ScanRegion
impl !RefUnwindSafe for ScanRegion
impl Send for ScanRegion
impl Sync for ScanRegion
impl Unpin for ScanRegion
impl !UnwindSafe for ScanRegion
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