1.6 KiB
TO_LONG [esql-to_long]
Syntax
:::{image} ../../../../../images/to_long.svg :alt: Embedded :class: text-center :::
Parameters
field- Input value. The input can be a single- or multi-valued column or an expression.
Description
Converts an input value to a long value. If the input parameter is of a date type, its value will be interpreted as milliseconds since the Unix epoch, converted to long. Boolean true will be converted to long 1, false to 0.
Supported types
| field | result |
|---|---|
| boolean | long |
| counter_integer | long |
| counter_long | long |
| date | long |
| date_nanos | long |
| double | long |
| integer | long |
| keyword | long |
| long | long |
| text | long |
| unsigned_long | long |
Example
ROW str1 = "2147483648", str2 = "2147483648.2", str3 = "foo"
| EVAL long1 = TO_LONG(str1), long2 = TO_LONG(str2), long3 = TO_LONG(str3)
| str1:keyword | str2:keyword | str3:keyword | long1:long | long2:long | long3:long |
|---|---|---|---|---|---|
| 2147483648 | 2147483648.2 | foo | 2147483648 | 2147483648 | null |
Note that in this example, the last conversion of the string isn’t possible. When this happens, the result is a null value. In this case a Warning header is added to the response. The header will provide information on the source of the failure:
"Line 1:113: evaluation of [TO_LONG(str3)] failed, treating result as null. Only first 20 failures recorded."
A following header will contain the failure reason and the offending value:
"java.lang.NumberFormatException: For input string: "foo""