THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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| Type | Size | Description |
|---|---|---|
| Bitmask(n) | ⌈n/8⌉ bytes | A fixed-length bitmask of n bits |
| ByteInt8 | 1 byte | 1-byte signed integer |
| Uint8 | 1 byte | 1-byte unsigned integer |
| Int16Short | 2 bytes | 2-byte signed integer |
| Uint16 | 2 bytes | 2-byte unsigned integer |
| Int32Integer | 4 bytes | 4-byte signed integer |
| Uint32 | 4 bytes | 4-byte unsigned integer |
| LongInt64 | 8 bytes | 8-byte signed integer |
| Uint64 | 8 bytes | 8-byte unsigned integer |
| Float | 4 bytes | 4-byte floating-point number |
| Double | 8 bytes | 8-byte floating-point number |
| Number([n]) | Variable | Variable-length number (optionally bound by n bytes in size) |
| Decimal | Variable | Variable-length floating point number |
| UUID | 16 bytes | UUID |
| String | Variable | String encoded with a given Charset |
| Date | 3 bytes | A timezone-free date encoded as year (15 bits), month (4 bits), day (5 bits) |
| Time | 4 bytes | A timezone-free time encoded as padding (5 bits), hour (5 bits), minute (6 bits), second (6 bits), millisecond (10 bits) |
| Datetime | 7 bytes | A timezone-free datetime encoded as (date, time) |
| Instant | 8 bytes | Number of milliseconds since Jan 1, 1970 00:00:00.000 (with no timezone) |
| BLOB | Variable | Variable-size byte array |
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Ignite will provide out-of-box mapping from standard platform types (Java, C#, C++) to built-in primitives. A user will be able to alter this mapping using some external mechanism (e.g. annotations to map long values to Number). Standard mapping is listed in the table below:
| Built-in | Java | C# | C++ |
|---|---|---|---|
| Bitmask(n) | BitSet |
| Int8 | byte (Byte if nullable) |
| sbyte | |||
| Uint8 | short with range constraints | byte | |
| Int16 | short (Short if nullable) |
| short | |||
| Uint16 | int with range constratints | ushort | |
| Int32 | int (Integer if nullable) |
| int | |||
| Uint32 | long with range constratints | uint | |
| Int64 | long (Long if nullable) | long | |
| Uint64 | BigInteger with range constratints | ulong | |
| Float | float (Float if nullable) | float | |
| Double | double (Double if nullable) | double | |
| Number([n]) | BigInteger | BigInteger | |
| Decimal | BigDecimal | decimal | |
| UUID | UUID | Guid | |
| String | String | string | |
| Date | LocalDate | ||
| Time | LocalTime | ||
| Datetime | LocalDateTime | ||
| Instant | Date (Instant?) | ||
| BLOB | byte[] |
As Java has no native support for unsigned types. We still can introduce 'unsigned' flag to schema type and separate binary type-codes, and allow to map to the closest types of wider range. E.g. map Uint8 → short and recheck constraints during serialization.
If one will try to serialize object with 'short' value out of Uint8 range then it end up with exception (ColumnValueIsOutOfRangeException).
Dynamic schema expansion (flexible schemas)
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