Package org.apache.flink.table.expressions

Interface Summary

Interface	Description
Expression	General interface for all kinds of expressions.
ExpressionVisitor<R>	The visitor definition of Expression.
ResolvedExpression	Expression that has been fully resolved and validated.
SqlFactory	Factory for serializing ResolvedExpression to a string.
TableSymbol	The base interface for all table symbols.

Class Summary

Class	Description
AggregateExpression	Resolved and validated expression for calling an aggregate function.
CallExpression	Resolved and validated call expression for calling a function.
DefaultSqlFactory	Default implementation of SqlFactory that throws an exception when trying to serialize an inline function.
ExpressionDefaultVisitor<T>	Implementation of ExpressionVisitor that redirects all calls to ExpressionDefaultVisitor.defaultMethod(Expression).
ExpressionUtils	Utility methods for working with Expressions.
FieldReferenceExpression	A reference to a field in an input.
NestedFieldReferenceExpression	A reference to a nested field in an input.
ResolvedFieldReference	A reference to a field in an input which has been resolved.
SqlCallExpression	A call to a SQL expression.
TypeLiteralExpression	Expression that wraps DataType as a literal.
ValueLiteralExpression	Expression for constant literal values.

Enum Summary

Enum	Description
TimeIntervalUnit	Units for working with time intervals.
TimePointUnit	Units for working with points in time.

Exception Summary

Exception	Description
ExpressionParserException	Exception for all errors occurring during expression parsing.