org.apache.flink.table.expressions.resolver.rules

Interface ResolverRule

@Internal
public interface ResolverRule

Rule that can be applied during resolution of Expression. Rules are applied to a collection of expressions at once, e.g. all expressions in a projection. One must consider order in which rules are applied. Some rules might e.g. require that references to fields have to be already resolved.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ResolverRule.ResolutionContext Contextual information that can be used during application of the rule.

Method Summary

Modifier and Type	Method and Description
List<Expression>	apply(List<Expression> expression, ResolverRule.ResolutionContext context)

Method Detail

apply

List<Expression> apply(List<Expression> expression,
                       ResolverRule.ResolutionContext context)