org.h2.expression

类 IntervalOperation

java.lang.Object

org.h2.expression.Expression

org.h2.expression.Operation2

org.h2.expression.IntervalOperation

所有已实现的接口:

HasSQL, Typed

public class IntervalOperation
extends Operation2

A mathematical operation with intervals.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	IntervalOperation.IntervalOpType

字段概要

从类继承的字段 org.h2.expression.Operation2

left, right, type

从类继承的字段 org.h2.expression.Expression

AUTO_PARENTHESES, MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL, WITH_PARENTHESES, WITHOUT_PARENTHESES

从接口继承的字段 org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

构造器概要

构造器

构造器和说明
IntervalOperation(IntervalOperation.IntervalOpType opType, Expression left, Expression right)
IntervalOperation(IntervalOperation.IntervalOpType opType, Expression left, Expression right, TypeInfo forcedType)

方法概要

限定符和类型	方法和说明
StringBuilder	getUnenclosedSQL(StringBuilder builder, int sqlFlags) Get the SQL statement of this expression.
Value	getValue(SessionLocal session) Return the resulting value for the current row.
boolean	needParentheses() Returns whether this expressions needs to be wrapped in parentheses when it is used as an argument of other expressions.
Expression	optimize(SessionLocal session) Try to optimize the expression.

从类继承的方法 org.h2.expression.Operation2

getCost, getSubexpression, getSubexpressionCount, getType, isEverything, mapColumns, setEvaluatable, updateAggregate

从类继承的方法 org.h2.expression.Expression

addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getColumnNameForView, getEnclosedSQL, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getSQL, getSQL, getSQL, getSQL, getTableAlias, getTableName, getWhenSQL, getWhenValue, isConstant, isIdentity, isNullConstant, isValueSet, isWhenConditionOperand, optimizeCondition, toString, writeExpressions, writeExpressions

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

从接口继承的方法 org.h2.util.HasSQL

getTraceSQL

构造器详细资料

IntervalOperation

public IntervalOperation(IntervalOperation.IntervalOpType opType,
                         Expression left,
                         Expression right,
                         TypeInfo forcedType)

IntervalOperation

public IntervalOperation(IntervalOperation.IntervalOpType opType,
                         Expression left,
                         Expression right)

方法详细资料

needParentheses

public boolean needParentheses()

从类复制的说明: Expression

Returns whether this expressions needs to be wrapped in parentheses when it is used as an argument of other expressions.

覆盖:

needParentheses 在类中 Expression

返回:

true if it is

getUnenclosedSQL

public StringBuilder getUnenclosedSQL(StringBuilder builder,
                                      int sqlFlags)

从类复制的说明: Expression

Get the SQL statement of this expression. This may not always be the original SQL statement, especially after optimization. Enclosing '(' and ')' are never appended.

指定者:

getUnenclosedSQL 在类中 Expression

参数:

builder - string builder

sqlFlags - formatting flags

返回:

the specified string builder

getValue

public Value getValue(SessionLocal session)

从类复制的说明: Expression

Return the resulting value for the current row.

指定者:

getValue 在类中 Expression

参数:

session - the session

返回:

the result

optimize

public Expression optimize(SessionLocal session)

从类复制的说明: Expression

Try to optimize the expression.

指定者:

optimize 在类中 Expression

参数:

session - the session

返回:

the optimized expression