Package org.apache.drill.exec.physical.impl.scan.v3.file

Class ImplicitColumnResolver.ImplicitColumnOptions

java.lang.Object

org.apache.drill.exec.physical.impl.scan.v3.file.ImplicitColumnResolver.ImplicitColumnOptions

Enclosing class:

ImplicitColumnResolver

public static class ImplicitColumnResolver.ImplicitColumnOptions
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected DrillFileSystem	dfs
protected int	maxPartitionDepth
protected OptionSet	optionSet
protected boolean	useLegacyWildcardExpansion	Historically Drill will expand partition columns (dir0, dir1, ...) when the project list includes a wildcard.

Constructor Summary

Constructors

Constructor	Description
ImplicitColumnOptions()

Method Summary

Modifier and Type	Method	Description
ImplicitColumnResolver.ImplicitColumnOptions	dfs(DrillFileSystem dfs)
ImplicitColumnResolver.ImplicitColumnOptions	maxPartitionDepth(int maxPartitionDepth)	The maximum partition depth for any file in this query.
ImplicitColumnResolver.ImplicitColumnOptions	optionSet(OptionSet optionSet)
ImplicitColumnResolver.ImplicitColumnOptions	useLegacyWildcardExpansion(boolean flag)	Indicates whether to expand partition columns when the query contains a wildcard.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

optionSet

protected OptionSet optionSet

maxPartitionDepth

protected int maxPartitionDepth

useLegacyWildcardExpansion

protected boolean useLegacyWildcardExpansion

Historically Drill will expand partition columns (dir0, dir1, ...) when the project list includes a wildcard.

dfs

protected DrillFileSystem dfs

Constructor Details

ImplicitColumnOptions

public ImplicitColumnOptions()

Method Details

optionSet

public ImplicitColumnResolver.ImplicitColumnOptions optionSet(OptionSet optionSet)

maxPartitionDepth

public ImplicitColumnResolver.ImplicitColumnOptions maxPartitionDepth(int maxPartitionDepth)

The maximum partition depth for any file in this query. Specifies the maximum number of diri columns that this parser will recognize or generate.

useLegacyWildcardExpansion

public ImplicitColumnResolver.ImplicitColumnOptions useLegacyWildcardExpansion(boolean flag)

Indicates whether to expand partition columns when the query contains a wildcard. Supports queries such as the following:

 select * from dfs.`partitioned-dir`

In which the output columns will be (columns, dir0) if the partitioned directory has one level of nesting. See TestImplicitFileColumns#testImplicitColumns

dfs

public ImplicitColumnResolver.ImplicitColumnOptions dfs(DrillFileSystem dfs)