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Data Types

The page contains a list of SQL data types available in GridGain such as string, numeric, and date/time types.

Every SQL type is mapped to a programming language or driver specific type that is supported by GridGain natively.

Boolean Types

BOOLEAN

Possible values: TRUE and FALSE.

Type Mapping

ColumnType SQL Java .NET C++

BOOLEAN

BOOLEAN

Boolean

bool

bool

Numeric Types

TINYINT

Possible values: [-128, 127].

Type Mapping

ColumnType SQL Java .NET C++

INT8

TINYINT

Byte

sbyte

std::int8_t

SMALLINT

Possible values: [-32768, 32767].

Type Mapping

ColumnType SQL Java .NET C++

INT16

SMALLINT

Short

short

std::int16_t

INT

Possible values: [-2147483648, 2147483647].

Alias: INTEGER

Type Mapping

ColumnType SQL Java .NET C++

INT32

INT

Integer

int

std::int32_t

BIGINT

Possible values: [-9223372036854775808, 9223372036854775807].

Type Mapping

ColumnType SQL Java .NET C++

INT64

BIGINT

Long

long

std::int64_t

DECIMAL

Possible values: Exact number of selectable precision.

Default precision: 32767

Maximum precision: 32767

Default scale: 0

Maximum scale: 16383

Decimal Precision and Scale in GridGain

GridGain has the following specifics when handling decimal values:

  • You can specify scale that is larger than precision. In this case, the column will only hold fractional values, and the number of 0 digits to the right of the decimal point must be the same as scale minus precision. For example if you use the following declaration:

    DECIMAL(3, 6)

    You can store values between -0.000999 and 0.000999, inclusive.

  • BigDecimal data type is derived as DECIMAL(28, 6). If there are more than 6 digits after the decimal point, they will be dropped. If a value larger than precision is passed, out of range exception will occur.

    To store larger decimal values, cast them with custom precision, for example CAST(? as DECIMAL(100, 50)).

Type Mapping

ColumnType SQL Java .NET C++

DECIMAL

DECIMAL

BigDecimal

BigDecimal

big_decimal

REAL

Possible values: A single precision (32-bit) IEEE 754 floating-point number.

Special values: NaN, -Infinity, +Infinity

Type Mapping

ColumnType SQL Java .NET C++

FLOAT

REAL

Float

float

float

DOUBLE

Possible values: A double precision (64-bit) IEEE 754 floating-point number.

Alias: DOUBLE PRECISION

Special values: NaN, -Infinity, +Infinity

Type Mapping

ColumnType SQL Java .NET C++

DOUBLE

DOUBLE

Double

double

double

Character String Types

VARCHAR

Possible values: A Unicode string.

Alias: CHARACTER VARYING

Default length: 65536

Maximum length: 2147483648

Type Mapping

ColumnType SQL Java .NET C++

STRING

VARCHAR

String

string

std::string

CHAR (Limited Support)

Fixed length Unicode string padded with spaces.

Default length: 1

Maximum length: 65536

Type Mapping

ColumnType SQL Java .NET C++

STRING

CHAR

String

string

std::string

Binary String Types

VARBINARY

Possible values: binary data (“byte array”).

Aliases: BINARY, BINARY VARYING

Default length: 65536

Maximum length: 2147483648

Type Mapping

ColumnType SQL Java .NET C++

BYTE_ARRAY

VARBINARY

byte[]

byte[]

std::vector<std::byte>

Date and Time Types

TIME

Possible values: The time data type. The format is hh:mm:ss.

Default precision: 0

Maximum precision: 3

Mapped to: LocalTime

Type Mapping

ColumnType SQL Java .NET C++

TIME

TIME

LocalTime

LocalTime

ignite_time

DATE

Possible values: The date data type.

The format is yyyy-MM-dd.

Mapped to: LocalDate

Type Mapping

ColumnType SQL Java .NET C++

DATE

DATE

LocalDate

LocalDate

ignite_date

TIMESTAMP

Possible values: The timestamp data type. The format is yyyy-MM-dd hh:mm:ss[.mmm].

Default precision: 6

Maximum precision: 9

Mapped to:

  • LocalDateTime when used without time zone.

  • Instant when used with time zone.

Type Mapping

ColumnType SQL Java .NET C++

DATETIME

TIMESTAMP

LocalDateTime

LocalDateTime

ignite_date_time

TIMESTAMP WITH LOCAL TIMEZONE

Possible values: The timestamp data type that accounts for the user’s local time zone offset. The time zone offset is not stored as part of column data. When retrieved, the value is automatically converted to the time zone of the session. The format is yyyy-MM-dd hh:mm:ss[.mmm].

Default precision: 6

Maximum precision: 9

Mapped to:

  • LocalDateTime when used without time zone.

  • Instant when used with time zone.

Type Mapping

ColumnType SQL Java .NET C++

DATETIME

TIMESTAMP

LocalDateTime

LocalDateTime

ignite_date_time

Other Types

UUID

Possible values: Universally unique identifier. This is a 128 bit value.

Example UUID: 7d24b70e-25d5-45ed-a5fa-39d8e1d966b9

Type Mapping

ColumnType SQL Java .NET C++

UUID

UUID

UUID

Guid

uuid

NULL

A field containing the null value.

Type Mapping

ColumnType SQL Java .NET C++

NULL

NULL

Void

Null

nullptr

Implicit Type Conversion

In GridGain 9, implicit type conversion is limited to types within the same type family. The table below covers the possible implicit conversions:

Type Family Available Types

Boolean

BOOLEAN

Numeric

TINYINT, SMALLINT, INT, BIGINT, DECIMAL, FLOAT, DOUBLE

Character String

VARCHAR, CHAR

Binary String

VARBINARY BINARY

Date

DATE

Time

TIME

Datetime

TIMESTAMP, TIMESTAMP WITH LOCAL TIME ZONE

UUID

UUID

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Last updated on Oct 17, 2025