org.apache.flink.table.types.inference.utils

类 UnknownCallContext

java.lang.Object

org.apache.flink.table.types.inference.utils.UnknownCallContext

所有已实现的接口:

CallContext

@Internal
public final class UnknownCallContext
extends Object
implements CallContext

A CallContext with unknown data types.

构造器概要

构造器

构造器和说明
UnknownCallContext(DataTypeFactory typeFactory, String name, FunctionDefinition functionDefinition, int argumentCount, boolean isGroupedAggregation)

方法概要

限定符和类型	方法和说明
List<DataType>	getArgumentDataTypes() Returns a resolved list of the call's argument types.
<T> Optional<T>	getArgumentValue(int pos, Class<T> clazz) Returns the literal value of the argument at the given position, given that the argument is a literal, is not null, and can be expressed as an instance of the provided class.
DataTypeFactory	getDataTypeFactory() Enables to lookup types in a catalog and resolve RAW types.
FunctionDefinition	getFunctionDefinition() Returns the function definition that defines the function currently being called.
String	getName() Returns the function's name usually referencing the function in a catalog.
Optional<DataType>	getOutputDataType() Returns the inferred output data type of the function call.
boolean	isArgumentLiteral(int pos) Returns whether the argument at the given position is a value literal.
boolean	isArgumentNull(int pos) Returns true if the argument at the given position is a literal and null, false otherwise.
boolean	isGroupedAggregation() Returns whether the function call happens as part of an aggregation that defines grouping columns.

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.apache.flink.table.types.inference.CallContext

newValidationError

构造器详细资料

UnknownCallContext

public UnknownCallContext(DataTypeFactory typeFactory,
                          String name,
                          FunctionDefinition functionDefinition,
                          int argumentCount,
                          boolean isGroupedAggregation)

方法详细资料

getDataTypeFactory

public DataTypeFactory getDataTypeFactory()

从接口复制的说明: CallContext

Enables to lookup types in a catalog and resolve RAW types.

指定者:

getDataTypeFactory 在接口中 CallContext

getFunctionDefinition

public FunctionDefinition getFunctionDefinition()

从接口复制的说明: CallContext

Returns the function definition that defines the function currently being called.

指定者:

getFunctionDefinition 在接口中 CallContext

isArgumentLiteral

public boolean isArgumentLiteral(int pos)

从接口复制的说明: CallContext

Returns whether the argument at the given position is a value literal.

指定者:

isArgumentLiteral 在接口中 CallContext

isArgumentNull

public boolean isArgumentNull(int pos)

从接口复制的说明: CallContext

Returns true if the argument at the given position is a literal and null, false otherwise.

Use CallContext.isArgumentLiteral(int) before to check if the argument is actually a literal.

指定者:

isArgumentNull 在接口中 CallContext

getArgumentValue

public <T> Optional<T> getArgumentValue(int pos,
                                        Class<T> clazz)

从接口复制的说明: CallContext

Returns the literal value of the argument at the given position, given that the argument is a literal, is not null, and can be expressed as an instance of the provided class.

It supports conversions to default conversion classes of LogicalTypes. This method should not be called with other classes.

Use CallContext.isArgumentLiteral(int) before to check if the argument is actually a literal.

指定者:

getArgumentValue 在接口中 CallContext

getName

public String getName()

从接口复制的说明: CallContext

Returns the function's name usually referencing the function in a catalog.

Note: The name is meant for debugging purposes only.

指定者:

getName 在接口中 CallContext

getArgumentDataTypes

public List<DataType> getArgumentDataTypes()

从接口复制的说明: CallContext

Returns a resolved list of the call's argument types. It also includes a type for every argument in a vararg function call.

指定者:

getArgumentDataTypes 在接口中 CallContext

getOutputDataType

public Optional<DataType> getOutputDataType()

从接口复制的说明: CallContext

Returns the inferred output data type of the function call.

It does this by inferring the input argument data type using ArgumentTypeStrategy.inferArgumentType(CallContext, int, boolean) of a wrapping call (if available) where this function call is an argument. For example, takes_string(this_function(NULL)) would lead to a DataTypes.STRING() because the wrapping call expects a string argument.

指定者:

getOutputDataType 在接口中 CallContext

isGroupedAggregation

public boolean isGroupedAggregation()

从接口复制的说明: CallContext

Returns whether the function call happens as part of an aggregation that defines grouping columns.

E.g. SELECT COUNT(*) FROM t is not a grouped aggregation but SELECT COUNT(*) FROM t GROUP BY k is.

指定者:

isGroupedAggregation 在接口中 CallContext