Conversion functions - Data Transformation| Alibaba Cloud Documentation Center

Functions


Type	Function	Description
Basic type conversion	ct_int	Converts the value of a field or an expression to an integer.
	ct_float	Converts the value of a field or an expression to a floating-point number.
	ct_str	Converts the value of a field or an expression to a string.
	ct_bool	Converts the value of a field or an expression to a Boolean value.
Number conversion	ct_chr	Converts the ANSI or Unicode value of a field or an expression to a character.
	ct_ord	Converts the value of a field or an expression to an ANSI or a Unicode value.
	ct_hex	Converts the value of a field or an expression to a hexadecimal number.
	ct_oct	Converts the value of a field or an expression to an octal number.
	ct_bin	Converts the value of a field or an expression to a binary number.

ct_int

Syntax
```
ct_int(value, base=10)
```

Parameters


Parameter	Type	Required	Description
value	Number or numeric string	Yes	The value to be converted.
base	Number	No	The base of the value to be converted. Default value: 10. If the value of `base` is 8, the function converts an octal value to a decimal value.

Response
The converted integer.
Examples
- Example 1: Convert a string to an integer.
  Raw log:
```
number: 2
```
  Transformation rule:
```
e_set("int_number", ct_int(v("number")))
```
  Transformation result:
```
number: 2
int_number:  2
```
- Example 2: Convert a hexadecimal value to a decimal value.
  Raw log:
```
number: AB
```
  Transformation rule:
```
e_set("int_number", ct_int(v("number"),base=16))
```
  Transformation result:
```
number: AB
int_number:  171
```

ct_float

Syntax
```
ct_float(value)
```

Parameters


Parameter	Type	Required	Description
value	Number or numeric string	Yes	The value to be converted.

Response
The converted floating-point value.
Example: Convert an integer to a floating-point value.
Raw log:
```
price: 2
```
Transformation rule:
```
e_set("price_float", ct_float(v("price")))
```
Transformation result:
```
price: 2
price_float:  2.0
```

ct_str

Syntax
```
ct_str(value)
```

Parameters


Parameter	Type	Required	Description
value	Any type	Yes	The value to be converted.

Response
The converted string.
Example: Convert an integer to a string.
Transformation rule:
```
e_set("ct_str", ct_str(b'test byte'))
```
Transformation result:
```
ct_str: test byte
```

ct_bool

Syntax
```
ct_bool(value)
```

Parameters


Parameter	Type	Required	Description
value	Any type	Yes	The value to be converted.

Response
The converted Boolean value.

Examples

Raw log:

num: 2

Transformation rule:

e_set("ct_bool", ct_bool(v("number")))

Transformation result:

num: 2
ct_bool: true

ct_chr

Syntax
```
ct_chr(value)
```

Parameters


Parameter	Type	Required	Description
value	Number or numeric string	Yes	The value to be converted.

Response
The converted character.
Example: Convert a number to a character.
Raw log:
```
number: 78
```
Transformation rule:
```
e_set("ct_chr", ct_chr(v("number")))
```
Transformation result:
```
number: 78
ct_chr: N
```

ct_ord

Syntax
```
ct_ord(value)
```

Parameters


Parameter	Type	Required	Description
value	String	Yes	The value to be converted, whose length is 1.

Response
The converted ANSI or Unicode value.
Example: Convert a string to an ANSI or a Unicode value.
Raw log:
```
world: a
```
Transformation rule:
```
e_set("ct_ord", ct_ord(v("world")))
```
Transformation result:
```
world: a
ct_ord: 97
```

ct_hex

Syntax
```
ct_hex(value)
```

Parameters


Parameter	Type	Required	Description
value	Number or numeric string	Yes	The value to be converted.

Response
The converted hexadecimal number.
Example: Convert a number to a hexadecimal number.
Raw log:
```
number: 123
```
Transformation rule:
```
e_set("ct_hex", ct_hex(v("number")))
```
Transformation result:
```
number: 123
ct_hex: 0x7b
```

ct_oct

Syntax
```
ct_oct(value)
```

Parameters


Parameter	Type	Required	Description
value	Number or numeric string	Yes	The value to be converted.

Response
The converted octal number.
Example: Convert a number to an octal number.
Raw log:
```
number: 123
```
Transformation rule:
```
e_set("ct_oct", ct_oct(v("number")))
```
Transformation result:
```
number: 123
ct_oct: 0o173
```

ct_bin

Syntax
```
ct_bin(value)
```

Parameters


Parameter	Type	Required	Description
value	Number or numeric string	Yes	The value to be converted.

Response
The converted binary number.
Example: Convert a number to a binary number.
Raw log:
```
number: 123
```
Transformation rule:
```
e_set("ct_bin", ct_bin(v("number")))
```
Transformation result:
```
number: 123
ct_bin: 0b1111011
```