Package org.apache.drill.exec.physical.impl.scan.project

Interface ScanLevelProjection.ScanProjectionParser

All Known Implementing Classes:

ColumnsArrayParser, FileMetadataColumnsParser

Enclosing class:

ScanLevelProjection

public static interface ScanLevelProjection.ScanProjectionParser

Interface for add-on parsers, avoids the need to create a single, tightly-coupled parser for all types of columns. The main parser handles wildcards and assumes the rest of the columns are table columns. The add-on parser can tag columns as special, such as to hold metadata.

Method Summary

Modifier and Type	Method	Description
void	bind(ScanLevelProjection builder)
void	build()
boolean	parse(RequestedColumn inCol)
void	validate()
void	validateColumn(ColumnProjection col)

Method Details

bind

void bind(ScanLevelProjection builder)

parse

boolean parse(RequestedColumn inCol)

validate

void validate()

validateColumn

void validateColumn(ColumnProjection col)

build

void build()