程序包 org.h2.expression

Expressions include mathematical operations, simple values, and others.

请参阅: 说明

接口概要

接口	说明
ExpressionWithFlags	Expression with flags.
ExpressionWithVariableParameters	An expression with variable number of parameters.
ParameterInterface	The interface for client side (remote) and server side parameters.

类概要

类	说明
Alias	A column alias as in SELECT 'Hello' AS NAME ...
ArrayConstructorByQuery	Array value constructor by query.
ArrayElementReference	Array element reference.
BinaryOperation	A mathematical expression, or string concatenation.
CompatibilityDatePlusTimeOperation	A compatibility mathematical operation with datetime values.
ConcatenationOperation	Character string concatenation as in 'Hello' || 'World', binary string concatenation as in X'01' || X'AB' or an array concatenation as in ARRAY[1, 2] || 3.
DomainValueExpression	An expression representing a value for domain constraint.
Expression	An expression is a operation, a value, or a function in a query.
ExpressionColumn	A column reference expression that represents a column of a table or view.
ExpressionList	A list of expressions, as in (ID, NAME).
ExpressionVisitor	The visitor pattern is used to iterate through all expressions of a query to optimize a statement.
FieldReference	Field reference.
Format	A format clause such as FORMAT JSON.
IntervalOperation	A mathematical operation with intervals.
Operation0	Operation without subexpressions.
Operation1	Operation with one argument.
Operation1_2	Operation with one or two arguments.
Operation2	Operation with two arguments.
OperationN	Operation with many arguments.
Parameter	A parameter of a prepared statement.
ParameterRemote	A client side (remote) parameter.
Rownum	Represents the ROWNUM function.
SearchedCase	A searched case.
SequenceValue	Wraps a sequence when used in a statement.
SimpleCase	A simple case.
SimpleCase.SimpleWhen
Subquery	A query returning a single value.
TimeZoneOperation	A time zone specification (AT { TIME ZONE | LOCAL }).
TypedValueExpression	An expression representing a constant value with a type cast.
UnaryOperation	Unary operation.
ValueExpression	An expression representing a constant value.
Variable	A user-defined variable, for example: @ID.
Wildcard	A wildcard expression as in SELECT * FROM TEST.

枚举概要

枚举	说明
BinaryOperation.OpType
Format.FormatEnum	Supported formats.
IntervalOperation.IntervalOpType

程序包org.h2.expression的说明

Expressions include mathematical operations, simple values, and others.