Uses of Interface
org.apache.drill.exec.physical.impl.scan.project.ColumnProjection

Packages that use ColumnProjection

Package	Description
org.apache.drill.exec.physical.impl.scan.columns	Handles the special "columns" column used by the text reader, and available to similar readers.
org.apache.drill.exec.physical.impl.scan.file	Handles optional file metadata columns: implicit columns and partition columns.
org.apache.drill.exec.physical.impl.scan.project	Provides run-time semantic analysis of the projection list for the scan operator.

Uses of ColumnProjection in org.apache.drill.exec.physical.impl.scan.columns

Classes in org.apache.drill.exec.physical.impl.scan.columns that implement ColumnProjection

Modifier and Type	Class	Description
class	ResolvedColumnsArrayColumn
class	UnresolvedColumnsArrayColumn

Methods in org.apache.drill.exec.physical.impl.scan.columns with parameters of type ColumnProjection

Modifier and Type	Method	Description
boolean	ColumnsArrayManager.resolveColumn(ColumnProjection col, ResolvedTuple outputTuple, TupleMetadata tableSchema)
void	ColumnsArrayParser.validateColumn(ColumnProjection col)

Uses of ColumnProjection in org.apache.drill.exec.physical.impl.scan.file

Classes in org.apache.drill.exec.physical.impl.scan.file that implement ColumnProjection

Modifier and Type	Class	Description
class	FileMetadataColumn	Represents projection column which resolved to a file metadata (AKA "implicit") column such as "filename", "fqn", etc.
class	MetadataColumn	Resolved value for a metadata column (implicit file or partition column.) Resolution here means identifying a value for the column.
class	PartitionColumn	Represents a partition column (usually dir0, dir1, ...).

Methods in org.apache.drill.exec.physical.impl.scan.file with parameters of type ColumnProjection

Modifier and Type	Method	Description
boolean	ImplicitColumnManager.resolveColumn(ColumnProjection col, ResolvedTuple tuple, TupleMetadata tableSchema)	Resolves metadata columns to concrete, materialized columns with the proper value for the present file.
void	FileMetadataColumnsParser.validateColumn(ColumnProjection outCol)

Uses of ColumnProjection in org.apache.drill.exec.physical.impl.scan.project

Classes in org.apache.drill.exec.physical.impl.scan.project that implement ColumnProjection

Modifier and Type	Class	Description
class	AbstractUnresolvedColumn	Represents a projected column that has not yet been bound to a table column, special column or a null column.
static class	AbstractUnresolvedColumn.UnresolvedColumn	Represents an unresolved table column to be provided by the reader (or filled in with nulls.) May be associated with a provided schema column.
static class	AbstractUnresolvedColumn.UnresolvedWildcardColumn
class	ResolvedColumn	A resolved column has a name, and a specification for how to project data from a source vector to a vector in the final output container.
class	ResolvedDictColumn
class	ResolvedMapColumn	Represents a column which is implicitly a map (because it has children in the project list), but which does not match any column in the table.
class	ResolvedNullColumn	Projected column that serves as both a resolved column (provides projection mapping) and a null column spec (provides the information needed to create the required null vectors.)
class	ResolvedTableColumn	Column that matches one provided by the table.

Fields in org.apache.drill.exec.physical.impl.scan.project with type parameters of type ColumnProjection

Modifier and Type	Field	Description
protected List<ColumnProjection>	ScanLevelProjection.outputCols

Methods in org.apache.drill.exec.physical.impl.scan.project that return types with arguments of type ColumnProjection

Modifier and Type	Method	Description
List<ColumnProjection>	ScanLevelProjection.columns()	The entire set of output columns, in output order.

Methods in org.apache.drill.exec.physical.impl.scan.project with parameters of type ColumnProjection

Modifier and Type	Method	Description
void	ScanLevelProjection.addMetadataColumn(ColumnProjection outCol)
void	ScanLevelProjection.addTableColumn(ColumnProjection outCol)
boolean	ReaderLevelProjection.ReaderProjectionResolver.resolveColumn(ColumnProjection col, ResolvedTuple tuple, TupleMetadata tableSchema)
protected void	ReaderLevelProjection.resolveSpecial(ResolvedTuple rootOutputTuple, ColumnProjection col, TupleMetadata tableSchema)
void	ScanLevelProjection.ScanProjectionParser.validateColumn(ColumnProjection col)