程序包 org.h2.expression

Expressions include mathematical operations, conditions, simple values, and functions.

请参阅: 说明

接口概要

接口	说明
FunctionCall	This interface is used by the built-in functions, as well as the user-defined functions.
ParameterInterface	The interface for client side (remote) and server side parameters.

类概要

类	说明
Aggregate	Implements the integrated aggregate functions, such as COUNT, MAX, SUM.
Alias	A column alias as in SELECT 'Hello' AS NAME ...
CompareLike	Pattern matching comparison expression: WHERE NAME LIKE ?
Comparison	Example comparison expressions are ID=1, NAME=NAME, NAME IS NULL.
ConditionAndOr	An 'and' or 'or' condition as in WHERE ID=1 AND NAME=?
ConditionExists	An 'exists' condition as in WHERE EXISTS(SELECT ...)
ConditionIn	An 'in' condition with a list of values, as in WHERE NAME IN(...)
ConditionInConstantSet	Used for optimised IN(...) queries where the contents of the IN list are all constant and of the same type.
ConditionInSelect	An 'in' condition with a subquery, as in WHERE ID IN(SELECT ...)
ConditionNot	A NOT condition.
Expression	An expression is a operation, a value, or a function in a query.
ExpressionColumn	A 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.
Function	This class implements most built-in functions of this database.
JavaAggregate	This class wraps a user-defined aggregate.
JavaFunction	This class wraps a user-defined function.
Operation	A mathematical expression, or string concatenation.
Parameter	A parameter of a prepared statement.
ParameterRemote	A client side (remote) parameter.
Rownum	Represents the ROWNUM function.
SequenceValue	Wraps a sequence when used in a statement.
Subquery	A query returning a single value.
TableFunction	Implementation of the functions TABLE(..) and TABLE_DISTINCT(..).
ValueExpression	An expression representing a constant value.
Variable	A user-defined variable, for example: @ID.
Wildcard	A wildcard expression as in SELECT * FROM TEST.

程序包org.h2.expression的说明

Expressions include mathematical operations, conditions, simple values, and functions.