Scenario 4: Converting Log Parameter Types Using the v, Cn_int, and Dt_totimestamp Functions

Sub-scenario 1: calls the op_add function to concatenate characters and add data.
The op_add function supports both string and numeric types. Therefore, parameter type conversion is not required.

Example:
- Raw log
```
{
    "a":"1",
    "b":"2"
}
```
- Processing rule
```
e_set("d",op_add(v("a"), v("b")))
e_set("e",op_add(ct_int(v("a")), ct_int(v("b"))))
```
- Processing result
```
{
	"a": 1,
	"b": 2,
	"d": 12,
	"e": 3
}
```
Sub-scenario 2: calls the field operation and ct_int functions to convert a data type, and call the op_mul function to multiply data.
Example:
- Raw logs
```
{
    "a":"2",
    "b":"5"
}
```
- Processing rule
```
e_set("c",op_mul(ct_int(v("a")), ct_int(v("b"))))
e_set("d",op_mul(v("a"), ct_int(v("b"))))
```
- Processing result
```
{
	"a": 2,
	"b": 5,
	"c": 10,
	"d": 22222
}
```
Scenario 3: calls the dt_parse and dt_parsetimestamp functions to convert a string or date and time to the standard time.
The dt_totimestamp function receives datetime objects, not strings. Therefore, you need to call the dt_parse function to convert the string value type of time1 to the datetime object type. You can also use the dt_parsetimestamp function, which can receive both datetime objects and strings.

Example:
- Raw logs
```
{
    "time1":"2019-09-17 9:00:00"
}
```
- Processing rule: converts the date and time represented by time1 to a Unix timestamp.
```
e_set("time2", dt_totimestamp(dt_parse(v("time1"))))
```
- Processing result
```
{
	"time1": "2019-09-17 9:00:00",
	"time2": 1568710800
}
```