com.facebook.presto.spi.relation

Interface DomainTranslator.ColumnExtractor<T>

Enclosing interface:

DomainTranslator

public static interface DomainTranslator.ColumnExtractor<T>

Method Summary

Modifier and Type	Method and Description
Optional<T>	extract(RowExpression expression, Domain domain) Given an expression and values domain, determine whether the expression qualifies as a "column" and return its desired representation.

Method Detail

extract

Optional<T> extract(RowExpression expression,
                    Domain domain)

Given an expression and values domain, determine whether the expression qualifies as a "column" and return its desired representation. Return Optional.empty() if expression doesn't qualify.