接口的使用
org.apache.flink.table.types.inference.TypeTransformation

使用TypeTransformation的程序包

程序包	说明
org.apache.flink.table.types.inference
org.apache.flink.table.types.inference.transforms
org.apache.flink.table.types.utils

org.apache.flink.table.types.inference中TypeTransformation的使用

声明为TypeTransformation的org.apache.flink.table.types.inference中的字段

限定符和类型	字段和说明
static TypeTransformation	TypeTransformations.TO_INTERNAL_CLASS Transformation that uses internal data structures for all conversion classes.

返回TypeTransformation的org.apache.flink.table.types.inference中的方法

限定符和类型	方法和说明
static TypeTransformation	TypeTransformations.legacyDecimalToDefaultDecimal() Returns a type transformation that transforms legacy decimal data type to DECIMAL(38, 18).
static TypeTransformation	TypeTransformations.legacyRawToTypeInfoRaw() Returns a type transformation that transforms LEGACY('RAW', ...) type to the RAW(..., ?)
static TypeTransformation	TypeTransformations.timeToSqlTypes() Returns a type transformation that transforms data type to a new data type whose conversion class is Timestamp/Time/Date if the original data type is TIMESTAMP/TIME/DATE.
static TypeTransformation	TypeTransformations.toNullable() Returns a type transformation that transforms data type to nullable data type but keeps other information unchanged.

org.apache.flink.table.types.inference.transforms中TypeTransformation的使用

实现TypeTransformation的org.apache.flink.table.types.inference.transforms中的类

限定符和类型	类和说明
class	DataTypeConversionClassTransformation This type transformation transforms the specified data types to a new one with the expected conversion class.
class	LegacyDecimalTypeTransformation This type transformation transforms the legacy decimal type (usually converted from Types.BIG_DEC) to DECIMAL(38, 18).
class	LegacyRawTypeTransformation This type transformation transforms the LEGACY('RAW', ...) type to the RAW(..., ?)

声明为TypeTransformation的org.apache.flink.table.types.inference.transforms中的字段

限定符和类型	字段和说明
static TypeTransformation	LegacyRawTypeTransformation.INSTANCE
static TypeTransformation	LegacyDecimalTypeTransformation.INSTANCE

org.apache.flink.table.types.utils中TypeTransformation的使用

参数类型为TypeTransformation的org.apache.flink.table.types.utils中的方法

限定符和类型	方法和说明
static DataType	DataTypeUtils.transform(DataType typeToTransform, TypeTransformation... transformations) Transforms the given data type to a different data type using the given transformations.