org.apache.flink.table.functions

Class TemporalTableFunctionImpl

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>

org.apache.flink.table.functions.TemporalTableFunction

org.apache.flink.table.functions.TemporalTableFunctionImpl

All Implemented Interfaces:

Serializable, org.apache.flink.table.functions.FunctionDefinition

@Internal
public final class TemporalTableFunctionImpl
extends org.apache.flink.table.functions.TemporalTableFunction

Class representing temporal table function over some history table. It takes one single argument, the timeAttribute, for which it returns matching version of the underlyingHistoryTable, from which this TemporalTableFunction was created.

This function shouldn't be evaluated. Instead calls to it should be rewritten by the optimiser into other operators (like Temporal Table Join).

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static org.apache.flink.table.functions.TemporalTableFunction	create(QueryOperation operationTree, org.apache.flink.table.expressions.Expression timeAttribute, org.apache.flink.table.expressions.Expression primaryKey)
void	eval(Timestamp t)
org.apache.flink.table.expressions.Expression	getPrimaryKey()
org.apache.flink.api.java.typeutils.RowTypeInfo	getResultType()
org.apache.flink.table.expressions.Expression	getTimeAttribute()
org.apache.flink.table.types.inference.TypeInference	getTypeInference(org.apache.flink.table.catalog.DataTypeFactory typeFactory)
QueryOperation	getUnderlyingHistoryTable()

Methods inherited from class org.apache.flink.table.functions.TableFunction

collect, getKind, getParameterTypes, setCollector

Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

close, functionIdentifier, open, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic

Method Detail

eval

public void eval(Timestamp t)

getTimeAttribute

public org.apache.flink.table.expressions.Expression getTimeAttribute()

getPrimaryKey

public org.apache.flink.table.expressions.Expression getPrimaryKey()

getTypeInference

public org.apache.flink.table.types.inference.TypeInference getTypeInference(org.apache.flink.table.catalog.DataTypeFactory typeFactory)

Specified by:

getTypeInference in interface org.apache.flink.table.functions.FunctionDefinition

Overrides:

getTypeInference in class org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>

getResultType

public org.apache.flink.api.java.typeutils.RowTypeInfo getResultType()

Overrides:

getResultType in class org.apache.flink.table.functions.TableFunction<org.apache.flink.types.Row>

getUnderlyingHistoryTable

public QueryOperation getUnderlyingHistoryTable()

create

public static org.apache.flink.table.functions.TemporalTableFunction create(QueryOperation operationTree,
                                                                            org.apache.flink.table.expressions.Expression timeAttribute,
                                                                            org.apache.flink.table.expressions.Expression primaryKey)