org.h2.expression.function.table

类 JavaTableFunction

java.lang.Object

org.h2.expression.function.table.TableFunction

org.h2.expression.function.table.JavaTableFunction

所有已实现的接口:

ExpressionWithVariableParameters, NamedExpression, HasSQL

public final class JavaTableFunction
extends TableFunction

This class wraps a user-defined function.

字段概要

从类继承的字段 org.h2.expression.function.table.TableFunction

args

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
JavaTableFunction(FunctionAlias functionAlias, Expression[] args)

方法概要

限定符和类型	方法和说明
String	getName() Get the name.
StringBuilder	getSQL(StringBuilder builder, int sqlFlags) Appends the SQL statement of this object to the specified builder.
ResultInterface	getValue(SessionLocal session) Get a result with.
ResultInterface	getValueTemplate(SessionLocal session) Get an empty result with the column names set.
boolean	isDeterministic() Whether the function always returns the same result for the same parameters.
void	optimize(SessionLocal session) Try to optimize this table function

从类继承的方法 org.h2.expression.function.table.TableFunction

addParameter, doneWithParameters

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.h2.util.HasSQL

getSQL, getTraceSQL

构造器详细资料

JavaTableFunction

public JavaTableFunction(FunctionAlias functionAlias,
                         Expression[] args)

方法详细资料

getValue

public ResultInterface getValue(SessionLocal session)

从类复制的说明: TableFunction

Get a result with.

指定者:

getValue 在类中 TableFunction

参数:

session - the session

返回:

the result

getValueTemplate

public ResultInterface getValueTemplate(SessionLocal session)

从类复制的说明: TableFunction

Get an empty result with the column names set.

指定者:

getValueTemplate 在类中 TableFunction

参数:

session - the session

返回:

the empty result

optimize

public void optimize(SessionLocal session)

从类复制的说明: TableFunction

Try to optimize this table function

覆盖:

optimize 在类中 TableFunction

参数:

session - the session

getSQL

public StringBuilder getSQL(StringBuilder builder,
                            int sqlFlags)

从接口复制的说明: HasSQL

Appends the SQL statement of this object to the specified builder.

指定者:

getSQL 在接口中 HasSQL

覆盖:

getSQL 在类中 TableFunction

参数:

builder - string builder

sqlFlags - formatting flags

返回:

the specified string builder

getName

public String getName()

从接口复制的说明: NamedExpression

Get the name.

返回:

the name in uppercase

isDeterministic

public boolean isDeterministic()

从类复制的说明: TableFunction

Whether the function always returns the same result for the same parameters.

指定者:

isDeterministic 在类中 TableFunction

返回:

true if it does