org.h2.mode

类 ModeFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.OperationN

org.h2.expression.function.FunctionN

org.h2.mode.ModeFunction

所有已实现的接口:

ExpressionWithVariableParameters, NamedExpression, HasSQL, Typed

直接已知子类:

FunctionsDB2Derby, FunctionsLegacy, FunctionsMSSQLServer, FunctionsMySQL, FunctionsOracle, FunctionsPostgreSQL

public abstract class ModeFunction
extends FunctionN

Base class for mode-specific functions.

字段概要

字段

限定符和类型	字段和说明
protected FunctionInfo	info The information about this function.
protected static int	VAR_ARGS Constant for variable number of arguments.

从类继承的字段 org.h2.expression.OperationN

args, argsCount, 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

方法概要

限定符和类型	方法和说明
void	doneWithParameters() This method must be called after all the parameters have been set.
static Expression	getCompatibilityDateTimeValueFunction(Database database, String name, int scale) Get an instance of the given function without parentheses for this database.
static ModeFunction	getFunction(Database database, String name) Get an instance of the given function for this database.
String	getName() Get the name.
boolean	isEverything(ExpressionVisitor visitor) Check if this expression and all sub-expressions can fulfill a criteria.

从类继承的方法 org.h2.expression.function.FunctionN

getUnenclosedSQL, getValue, getValue

从类继承的方法 org.h2.expression.OperationN

addParameter, getCost, getSubexpression, getSubexpressionCount, getType, mapColumns, optimizeArguments, 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, needParentheses, optimize, 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

字段详细资料

VAR_ARGS

protected static final int VAR_ARGS

Constant for variable number of arguments.

另请参阅:

常量字段值

info

protected final FunctionInfo info

The information about this function.

方法详细资料

getFunction

public static ModeFunction getFunction(Database database,
                                       String name)

Get an instance of the given function for this database. If no function with this name is found, null is returned.

参数:

database - the database

name - the upper case function name

返回:

the function object or null

getCompatibilityDateTimeValueFunction

public static Expression getCompatibilityDateTimeValueFunction(Database database,
                                                               String name,
                                                               int scale)

Get an instance of the given function without parentheses for this database. If no function with this name is found, null is returned.

参数:

database - the database

name - the upper case function name

scale - the scale, or -1

返回:

the function object or null

doneWithParameters

public void doneWithParameters()

从接口复制的说明: ExpressionWithVariableParameters

This method must be called after all the parameters have been set. It checks if the parameter count is correct when required by the implementation.

指定者:

doneWithParameters 在接口中 ExpressionWithVariableParameters

覆盖:

doneWithParameters 在类中 OperationN

getName

public String getName()

从接口复制的说明: NamedExpression

Get the name.

返回:

the name in uppercase

isEverything

public boolean isEverything(ExpressionVisitor visitor)

从类复制的说明: Expression

Check if this expression and all sub-expressions can fulfill a criteria. If any part returns false, the result is false.

覆盖:

isEverything 在类中 OperationN

参数:

visitor - the visitor

返回:

if the criteria can be fulfilled