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DocumentationTencentDB for TcaplusDBGetting StartedBasic ConceptsData Types

Data Types

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Last updated: 2024-12-04 10:12:05

Data Types

Last updated: 2024-12-04 10:12:05

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TencentDB for TcaplusDB supports Protocol Buffers data types.
Mapping between proto3 and Data Types in Programing Languages
.proto
C++
Java
Python
Go
Ruby
C#
PHP
Dart
Notes
double
double
double
float
float64
float
double
float
double
-
float
float
float
float
float32
float
float
float
double
-
int32
int32
int
int
int32
fixnum/
bignum
(as required)
int
integer
int
Uses variable-length encoding.
Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint32 instead.
int64
int64
long
int/
long
int64
bignum
long
integer/string
Int64
Uses variable-length encoding.
Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint64 instead.
uint32
uint32
int
int/
long
uint32
fixnum/
bignum
(as required)
uint
integer
int
Uses variable-length encoding.
uint64
uint64
long
int/
long
uint64
bignum
ulong
integer/string
Int64
Uses variable-length encoding.
sint32
int32
int
int
int32
fixnum/
bignum
(as required)
int
integer
int
Uses variable-length encoding.
sint64
int64
long
int/
long
int64
bignum
long
integer/string
Int64
Uses variable-length encoding.
Signed int value. These more efficiently encode negative numbers than regular int32s.
fixed32
uint32
int
int/
long
uint32
fixnum/
bignum
(as required)
uint
integer
int
Always four bytes.
More efficient than uint32 if values are generally greater than 2^28.
fixed64
uint64
long
int/
long
uint64
bignum
ulong
integer/string
Int64
Always eight bytes.
More efficient than uint64 if values are generally greater than 2^56.
sfixed32
int32
int
int
int32
fixnum/
bignum
(as required)
int
integer
int
Always four bytes.
sfixed64
int64
long
int/
long
int64
bignum
long
integer/string
Int64
Always eight bytes.
bool
bool
boolean
bool
bool
trueClass/
falseClass
bool
boolean
bool
-
string
string
String
str/
unicode
string
string
(UTF -8)
string
string
string
A string must always contain UTF-8 encoded or 7-bit ASCII text, and cannot be longer than 2^32.
bytes
string
ByteString
str
byte
string
(ASCII-8BIT)
bytestring
string
-
May contain any arbitrary sequence of bytes no longer than 2^32.
Mapping between proto2 and Data Types in Programing Languages
.proto
C++
Java
Python
Go
Notes
double
double
double
float
*float64
-
float
float
float
float
*float32
-
int32
int32
int
int
*int32
Uses variable-length encoding. Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint32 instead.
int64
int64
long
int/long
*int64
Uses variable-length encoding. Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint64 instead.
uint32
uint32
int
int/long
*uint32
Uses variable-length encoding.
uint64
uint64
long
int/long
*uint64
Uses variable-length encoding.
sint32
int32
int
int
*int32
Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.
sint64
int64
long
int/long
*int64
Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.
fixed32
uint32
int
int/long
*uint32
Always four bytes. More efficient than uint32 if values are generally greater than 2^28.
fixed64
uint64
long
int/long
*uint64
Always eight bytes. More efficient than uint64 if values are generally greater than 2^56.
sfixed32
int32
int
int
*int32
Always four bytes.
sfixed64
int64
long
int/long
*int64
Always eight bytes.
bool
bool
boolean
bool
*bool
-
string
string
String
unicode(Python 2)
or
str(Python 3)
*string
A string must always contain UTF-8 encoded or 7-bit ASCII text.
bytes
string
ByteString
bytes
byte
May contain any arbitrary sequence of bytes.
﻿

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.proto	C++	Java	Python	Go	Ruby	C#	PHP	Dart	Notes
double	double	double	float	float64	float	double	float	double	-
float	float	float	float	float32	float	float	float	double	-
int32	int32	int	int	int32	fixnum/ bignum (as required)	int	integer	int	Uses variable-length encoding. Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint32 instead.
int64	int64	long	int/ long	int64	bignum	long	integer/string	Int64	Uses variable-length encoding. Inefficient for encoding negative numbers. If your field is likely to have negative values, use sint64 instead.
uint32	uint32	int	int/ long	uint32	fixnum/ bignum (as required)	uint	integer	int	Uses variable-length encoding.
uint64	uint64	long	int/ long	uint64	bignum	ulong	integer/string	Int64	Uses variable-length encoding.
sint32	int32	int	int	int32	fixnum/ bignum (as required)	int	integer	int	Uses variable-length encoding.
sint64	int64	long	int/ long	int64	bignum	long	integer/string	Int64	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.
fixed32	uint32	int	int/ long	uint32	fixnum/ bignum (as required)	uint	integer	int	Always four bytes. More efficient than uint32 if values are generally greater than 2^28.
fixed64	uint64	long	int/ long	uint64	bignum	ulong	integer/string	Int64	Always eight bytes. More efficient than uint64 if values are generally greater than 2^56.
sfixed32	int32	int	int	int32	fixnum/ bignum (as required)	int	integer	int	Always four bytes.
sfixed64	int64	long	int/ long	int64	bignum	long	integer/string	Int64	Always eight bytes.
bool	bool	boolean	bool	bool	trueClass/ falseClass	bool	boolean	bool	-
string	string	String	str/ unicode	string	string (UTF -8)	string	string	string	A string must always contain UTF-8 encoded or 7-bit ASCII text, and cannot be longer than 2^32.
bytes	string	ByteString	str	byte	string (ASCII-8BIT)	bytestring	string	-	May contain any arbitrary sequence of bytes no longer than 2^32.

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