org.apache.flink.table.types.utils

类 LegacyTypeInfoDataTypeConverter

java.lang.Object

org.apache.flink.table.types.utils.LegacyTypeInfoDataTypeConverter

@Internal
public final class LegacyTypeInfoDataTypeConverter
extends Object

Converter between TypeInformation and DataType that reflects the behavior before Flink 1.9. The conversion is a 1:1 mapping that allows back-and-forth conversion. Note that nullability constraints might get lost during the back-and-forth conversion.

This converter only exists to still support deprecated methods that take or return TypeInformation. Some methods will still support type information in the future, however, the future type information support will integrate nicer with the new type stack.

This converter reflects the old behavior that includes:

• Use old java.sql.* time classes for time data types.
• Only support millisecond precision for timestamps or day-time intervals.
• Let variable precision and scale for decimal types pass through the planner.
• Inconsistent nullability. Most types are nullable even though type information does not support it.
• Distinction between BasicArrayTypeInfo and ObjectArrayTypeInfo.
• Let POJOs, case classes, and tuples pass through the planner.

Any changes here need to be applied to the legacy planner as well.

方法概要

限定符和类型	方法和说明
static DataType	toDataType(org.apache.flink.api.common.typeinfo.TypeInformation<?> typeInfo)
static org.apache.flink.api.common.typeinfo.TypeInformation<?>	toLegacyTypeInfo(DataType dataType)

从类继承的方法 java.lang.Object

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

方法详细资料

toDataType

public static DataType toDataType(org.apache.flink.api.common.typeinfo.TypeInformation<?> typeInfo)

toLegacyTypeInfo

public static org.apache.flink.api.common.typeinfo.TypeInformation<?> toLegacyTypeInfo(DataType dataType)