Package org.apache.flink.table.types.utils

Class LegacyTypeInfoDataTypeConverter

java.lang.Object
org.apache.flink.table.types.utils.LegacyTypeInfoDataTypeConverter
@Internal @Deprecated public final class LegacyTypeInfoDataTypeConverter extends Object
Deprecated.
Use DataTypeFactory.createDataType(TypeInformation) instead. Note that this method will not create legacy types anymore. It fully uses the new type system available only in the planner.
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.

  • Method Details

    • toDataType

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

    • toLegacyTypeInfo

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