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.
TableSymbol	The base interface for all table symbols.

Class Summary

Class	Description
AggregateExpression	Resolved and validated expression for calling an aggregate function.
ApiExpressionUtils	Utilities for API-specific Expressions.
ApiExpressionVisitor<R>	A visitor for all Expressions that might be created during API translation.
CallExpression	Resolved and validated call expression for calling a 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.
LocalReferenceExpression	Reference to entity local to a certain QueryOperation.
LookupCallExpression	A call expression where the target function has not been resolved yet.
NestedFieldReferenceExpression	A reference to a nested field in an input.
ResolvedExpressionVisitor<R>	A visitor for all ResolvedExpressions.
ResolvedFieldReference	A reference to a field in an input which has been resolved.
SqlCallExpression	A call to a SQL expression.
TableReferenceExpression	Expression that references another table.
TypeLiteralExpression	Expression that wraps DataType as a literal.
UnresolvedCallExpression	Unresolved call expression for calling a function identified by a FunctionDefinition.
UnresolvedReferenceExpression	An unresolved reference to a field, table, or local reference.
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.