Package org.apache.iceberg

Class DataTableScan

java.lang.Object
org.apache.iceberg.SnapshotScan<TableScan,FileScanTask,CombinedScanTask>
org.apache.iceberg.DataTableScan
All Implemented Interfaces:
Scan<TableScan,FileScanTask,CombinedScanTask>, TableScan
public class DataTableScan extends SnapshotScan<TableScan,FileScanTask,CombinedScanTask>

  • Field Details

    • SCAN_COLUMNS

      protected static final List<String> SCAN_COLUMNS

    • SCAN_WITH_STATS_COLUMNS

      protected static final List<String> SCAN_WITH_STATS_COLUMNS

    • DELETE_SCAN_COLUMNS

      protected static final List<String> DELETE_SCAN_COLUMNS

    • DELETE_SCAN_WITH_STATS_COLUMNS

      protected static final List<String> DELETE_SCAN_WITH_STATS_COLUMNS

    • PLAN_SCANS_WITH_WORKER_POOL

      protected static final boolean PLAN_SCANS_WITH_WORKER_POOL

  • Constructor Details

    • DataTableScan

      protected DataTableScan(Table table, Schema schema, org.apache.iceberg.TableScanContext context)

  • Method Details

    • appendsBetween

      public TableScan appendsBetween(long fromSnapshotId, long toSnapshotId)
      Description copied from interface: TableScan
      Create a new TableScan to read appended data from fromSnapshotId exclusive to toSnapshotId inclusive.
      Specified by:
      appendsBetween in interface TableScan
      Parameters:
      fromSnapshotId - the last snapshot id read by the user, exclusive
      toSnapshotId - read append data up to this snapshot id
      Returns:
      a table scan which can read append data from fromSnapshotId exclusive and up to toSnapshotId inclusive

    • appendsAfter

      public TableScan appendsAfter(long fromSnapshotId)
      Description copied from interface: TableScan
      Create a new TableScan to read appended data from fromSnapshotId exclusive to the current snapshot inclusive.
      Specified by:
      appendsAfter in interface TableScan
      Parameters:
      fromSnapshotId - - the last snapshot id read by the user, exclusive
      Returns:
      a table scan which can read append data from fromSnapshotId exclusive and up to current snapshot inclusive

    • useSnapshotSchema

      protected boolean useSnapshotSchema()
      Overrides:
      useSnapshotSchema in class SnapshotScan<TableScan,FileScanTask,CombinedScanTask>

    • newRefinedScan

      protected TableScan newRefinedScan(Table table, Schema schema, org.apache.iceberg.TableScanContext context)

    • doPlanFiles

      public CloseableIterable<FileScanTask> doPlanFiles()
      Specified by:
      doPlanFiles in class SnapshotScan<TableScan,FileScanTask,CombinedScanTask>

    • planTasks

      public CloseableIterable<CombinedScanTask> planTasks()
      Description copied from interface: Scan
      Plan balanced task groups for this scan by splitting large and combining small tasks.

      Task groups created by this method may read partial input files, multiple input files or both.

      Specified by:
      planTasks in interface Scan<TableScan,FileScanTask,CombinedScanTask>
      Returns:
      an Iterable of balanced task groups required by this scan

    • table

      public Table table()

    • io

      protected FileIO io()

    • tableSchema

      protected Schema tableSchema()

    • context

      protected org.apache.iceberg.TableScanContext context()

    • options

      protected Map<String,String> options()

    • scanColumns

      protected List<String> scanColumns()

    • shouldReturnColumnStats

      protected boolean shouldReturnColumnStats()

    • columnsToKeepStats

      protected Set<Integer> columnsToKeepStats()

    • shouldIgnoreResiduals

      protected boolean shouldIgnoreResiduals()

    • residualFilter

      protected Expression residualFilter()

    • shouldPlanWithExecutor

      protected boolean shouldPlanWithExecutor()

    • planExecutor

      protected ExecutorService planExecutor()

    • option

      public TableScan option(String property, String value)
      Description copied from interface: Scan
      Create a new scan from this scan's configuration that will override the Table's behavior based on the incoming pair. Unknown properties will be ignored.
      Specified by:
      option in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Parameters:
      property - name of the table property to be overridden
      value - value to override with
      Returns:
      a new scan based on this with overridden behavior

    • project

      public TableScan project(Schema projectedSchema)
      Description copied from interface: Scan
      Create a new scan from this with the schema as its projection.
      Specified by:
      project in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Parameters:
      projectedSchema - a projection schema
      Returns:
      a new scan based on this with the given projection

    • caseSensitive

      public TableScan caseSensitive(boolean caseSensitive)
      Description copied from interface: Scan
      Create a new scan from this that, if data columns where selected via Scan.select(java.util.Collection), controls whether the match to the schema will be done with case sensitivity. Default is true.
      Specified by:
      caseSensitive in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Returns:
      a new scan based on this with case sensitivity as stated

    • isCaseSensitive

      public boolean isCaseSensitive()
      Description copied from interface: Scan
      Returns whether this scan is case-sensitive with respect to column names.
      Specified by:
      isCaseSensitive in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Returns:
      true if case-sensitive, false otherwise.

    • includeColumnStats

      public TableScan includeColumnStats()
      Description copied from interface: Scan
      Create a new scan from this that loads the column stats with each data file.

      Column stats include: value count, null value count, lower bounds, and upper bounds.

      Specified by:
      includeColumnStats in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Returns:
      a new scan based on this that loads column stats.

    • includeColumnStats

      public TableScan includeColumnStats(Collection<String> requestedColumns)
      Description copied from interface: Scan
      Create a new scan from this that loads the column stats for the specific columns with each data file.

      Column stats include: value count, null value count, lower bounds, and upper bounds.

      Specified by:
      includeColumnStats in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Parameters:
      requestedColumns - column names for which to keep the stats.
      Returns:
      a new scan based on this that loads column stats for specific columns.

    • select

      public TableScan select(Collection<String> columns)
      Description copied from interface: Scan
      Create a new scan from this that will read the given data columns. This produces an expected schema that includes all fields that are either selected or used by this scan's filter expression.
      Specified by:
      select in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Parameters:
      columns - column names from the table's schema
      Returns:
      a new scan based on this with the given projection columns

    • filter

      public TableScan filter(Expression expr)
      Description copied from interface: Scan
      Create a new scan from the results of this filtered by the Expression.
      Specified by:
      filter in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Parameters:
      expr - a filter expression
      Returns:
      a new scan based on this with results filtered by the expression

    • filter

      public Expression filter()
      Description copied from interface: Scan
      Returns this scan's filter Expression.
      Specified by:
      filter in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Returns:
      this scan's filter expression

    • ignoreResiduals

      public TableScan ignoreResiduals()
      Description copied from interface: Scan
      Create a new scan from this that applies data filtering to files but not to rows in those files.
      Specified by:
      ignoreResiduals in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Returns:
      a new scan based on this that does not filter rows in files.

    • planWith

      public TableScan planWith(ExecutorService executorService)
      Description copied from interface: Scan
      Create a new scan to use a particular executor to plan. The default worker pool will be used by default.
      Specified by:
      planWith in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Parameters:
      executorService - the provided executor
      Returns:
      a table scan that uses the provided executor to access manifests

    • schema

      public Schema schema()
      Description copied from interface: Scan
      Returns this scan's projection Schema.

      If the projection schema was set directly using Scan.project(Schema), returns that schema.

      If the projection schema was set by calling Scan.select(Collection), returns a projection schema that includes the selected data fields and any fields used in the filter expression.

      Specified by:
      schema in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>
      Returns:
      this scan's projection schema

    • targetSplitSize

      public long targetSplitSize()
      Description copied from interface: Scan
      Returns the target split size for this scan.
      Specified by:
      targetSplitSize in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>

    • splitLookback

      public int splitLookback()
      Description copied from interface: Scan
      Returns the split lookback for this scan.
      Specified by:
      splitLookback in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>

    • splitOpenFileCost

      public long splitOpenFileCost()
      Description copied from interface: Scan
      Returns the split open file cost for this scan.
      Specified by:
      splitOpenFileCost in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>

    • metricsReporter

      public TableScan metricsReporter(MetricsReporter reporter)
      Description copied from interface: Scan
      Create a new scan that will report scan metrics to the provided reporter in addition to reporters maintained by the scan.
      Specified by:
      metricsReporter in interface Scan<ThisT,T extends ScanTask,G extends ScanTaskGroup<T>>