Struct LogScan 

pub struct LogScan {
    pub table_name: String,
    pub output_col_idx: Vec<usize>,
    pub table: Arc<TableCatalog>,
    pub chunk_size: Option<u32>,
    pub ctx: OptimizerContextRef,
    pub epoch_range: (u64, u64),
    pub version_id: HummockVersionId,
}

Fields

table_name: String

output_col_idx: Vec<usize>

Include output_col_idx and op_column

table: Arc<TableCatalog>

Descriptor of the table

chunk_size: Option<u32>

Help RowSeqLogScan executor use a better chunk size

ctx: OptimizerContextRef

epoch_range: (u64, u64)

version_id: HummockVersionId

Implementations

impl LogScan

pub fn output_column_ids(&self) -> Vec<ColumnId>

pub fn primary_key(&self) -> &[ColumnOrder]

fn column_names_with_table_prefix(&self) -> Vec<String>

pub(crate) fn column_names(&self) -> Vec<String>

pub fn distribution_key(&self) -> Option<Vec<usize>>

pub(crate) fn new( table_name: String, output_col_idx: Vec<usize>, table: Arc<TableCatalog>, ctx: OptimizerContextRef, epoch_range: (u64, u64), version_id: HummockVersionId, ) -> Self

Create a logical scan node for log table scan

pub(crate) fn columns_pretty<'a>(&self, verbose: bool) -> Pretty<'a>

pub(crate) fn schema(&self) -> Schema

pub(crate) fn out_fields(&self) -> FixedBitSet

pub(crate) fn ctx(&self) -> OptimizerContextRef

pub fn get_table_columns(&self) -> &[ColumnCatalog]

pub(crate) fn order_names(&self) -> Vec<String>

pub(crate) fn order_names_with_table_prefix(&self) -> Vec<String>

pub fn get_out_column_index_order(&self) -> Order

Return indices of fields the output is ordered by and corresponding direction

pub fn i2o_col_mapping(&self) -> ColIndexMapping

get the Mapping of columnIndex from internal column index to output column index

Trait Implementations

impl Clone for LogScan

fn clone(&self) -> LogScan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LogScan

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

Formats the value using the given formatter.

impl Hash for LogScan

where String: Hash, Vec<usize>: Hash, Arc<TableCatalog>: Hash, Option<u32>: Hash, (u64, u64): Hash, HummockVersionId: Hash,

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for LogScan

where String: PartialEq, Vec<usize>: PartialEq, Arc<TableCatalog>: PartialEq, Option<u32>: PartialEq, (u64, u64): PartialEq, HummockVersionId: PartialEq,

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for LogScan

where String: PartialEq, Vec<usize>: PartialEq, Arc<TableCatalog>: PartialEq, Option<u32>: PartialEq, (u64, u64): PartialEq, HummockVersionId: PartialEq,