Interface LogicalType

All Known Implementing Classes:

LogicalType.BsonType, LogicalType.DateType, LogicalType.DecimalType, LogicalType.EnumType, LogicalType.Float16Type, LogicalType.GeographyType, LogicalType.GeometryType, LogicalType.IntervalType, LogicalType.IntType, LogicalType.JsonType, LogicalType.ListType, LogicalType.MapType, LogicalType.NullType, LogicalType.StringType, LogicalType.TimestampType, LogicalType.TimeType, LogicalType.UuidType, LogicalType.VariantType

public sealed interface LogicalType
permits LogicalType.StringType, LogicalType.EnumType, LogicalType.UuidType, LogicalType.IntType, LogicalType.DecimalType, LogicalType.DateType, LogicalType.TimeType, LogicalType.TimestampType, LogicalType.IntervalType, LogicalType.JsonType, LogicalType.BsonType, LogicalType.ListType, LogicalType.MapType, LogicalType.VariantType, LogicalType.GeometryType, LogicalType.GeographyType, LogicalType.Float16Type, LogicalType.NullType

Logical types that provide semantic meaning to physical types. Sealed interface allows for parameterized types (e.g., DECIMAL with scale/precision).

Each implementation's toString() renders the Parquet-style annotation token shown in schema dumps and metadata views — STRING, LIST, DECIMAL(10, 2), TIMESTAMP(MICROS, UTC), and so on — not the default record representation.

See Also:

• File Format – Logical Types
• parquet.thrift

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static final record	LogicalType.BsonType	BSON document stored as a byte array.
static final record	LogicalType.DateType	Calendar date (days since Unix epoch).
static final record	LogicalType.DecimalType	Decimal with fixed scale and precision.
static enum	LogicalType.EdgeInterpolationAlgorithm	Geodesic formulations to model and compute the shortest path on Earth.
static final record	LogicalType.EnumType	Enum stored as a UTF-8 string.
static final record	LogicalType.Float16Type	IEEE 754 half-precision (binary16) floating point, stored as a 2-byte FIXED_LEN_BYTE_ARRAY in little-endian byte order.
static final record	LogicalType.GeographyType	Geography type with configurable CRS
static final record	LogicalType.GeometryType	Geometry type with configurable CRS
static final record	LogicalType.IntervalType	Interval stored as a 12-byte fixed-length byte array (months, days, millis).
static final record	LogicalType.IntType	Integer type with a specific bit width and signedness.
static final record	LogicalType.JsonType	JSON document stored as a UTF-8 string.
static final record	LogicalType.ListType	List (repeated element) logical type.
static final record	LogicalType.MapType	Map (key-value pairs) logical type.
static final record	LogicalType.NullType	Column whose every value is null.
static final record	LogicalType.StringType	UTF-8 encoded string.
static final record	LogicalType.TimestampType	Timestamp with configurable precision and UTC adjustment.
static final record	LogicalType.TimeType	Time of day with configurable precision and UTC adjustment.
static enum	LogicalType.TimeUnit	Resolution of time and timestamp logical types.
static final record	LogicalType.UuidType	UUID stored as a 16-byte fixed-length byte array.
static final record	LogicalType.VariantType	Variant (self-describing, semi-structured) logical type per the Parquet Variant spec.