Package org.apache.drill.metastore.expressions

Interface Summary

Interface	Description
FilterExpression	Interface which defines filter expression types by which Metastore data can be read or deleted.
FilterExpression.Visitor<T>	Transforms FilterExpression implementations into suitable for Metastore implementation representation.

Class Summary

Class	Description
DoubleExpressionPredicate	Indicates double expression predicate implementations.
DoubleExpressionPredicate.And	Indicates FilterExpression.Operator.AND operator expression: storagePlugin = 'dfs' and workspace = 'tmp'.
DoubleExpressionPredicate.Or	Indicates FilterExpression.Operator.OR operator expression: storagePlugin = 'dfs' or storagePlugin = 's3'.
IsPredicate	Indicates IS predicate implementations.
IsPredicate.IsNotNull	Indicates FilterExpression.Operator.IS_NOT_NULL operator expression: storagePlugin is not null.
IsPredicate.IsNull	Indicates FilterExpression.Operator.IS_NULL operator expression: storagePlugin is null.
ListPredicate<T>	Indicates list predicate implementations which have column and list of values.
ListPredicate.In<T>	Indicates FilterExpression.Operator.IN operator expression: storagePlugin in ('dfs', 's3').
ListPredicate.NotIn<T>	Indicates FilterExpression.Operator.NOT_IN operator expression: storagePlugin not in ('dfs', 's3').
SimplePredicate<T>	Indicates simple predicate implementations which have column and one value.
SimplePredicate.Equal<T>	Indicates FilterExpression.Operator.EQUAL operator expression: storagePlugin = 'dfs'.
SimplePredicate.GreaterThan<T>	Indicates FilterExpression.Operator.GREATER_THAN operator expression: index > 1.
SimplePredicate.GreaterThanOrEqual<T>	Indicates FilterExpression.Operator.GREATER_THAN_OR_EQUAL operator expression: index >= 1.
SimplePredicate.LessThan<T>	Indicates FilterExpression.Operator.LESS_THAN operator expression: index < 1.
SimplePredicate.LessThanOrEqual<T>	Indicates FilterExpression.Operator.LESS_THAN_OR_EQUAL operator expression: index <= 1.
SimplePredicate.NotEqual<T>	Indicates FilterExpression.Operator.NOT_EQUAL operator expression: storagePlugin != 'dfs'.
SingleExpressionPredicate	Indicates single expression predicate implementations.
SingleExpressionPredicate.Not	Indicates FilterExpression.Operator.NOT operator expression: not(storagePlugin = 'dfs').

Enum Summary

Enum	Description
FilterExpression.Operator	Indicates list of supported operators that can be used in filter expressions.