elasticsearch/docs/reference/esql/functions/examples/to_double.asciidoc
Fang Xing ad15d50863
[ES|QL] more doc generation via annotations (#107541)
Annotations for math functions, datetime functions, string functions, type conversion functions.
2024-04-22 14:43:36 -04:00

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// This is generated by ESQL's AbstractFunctionTestCase. Do no edit it. See ../README.md for how to regenerate it.
*Example*
[source.merge.styled,esql]
----
include::{esql-specs}/floats.csv-spec[tag=to_double-str]
----
[%header.monospaced.styled,format=dsv,separator=|]
|===
include::{esql-specs}/floats.csv-spec[tag=to_double-str-result]
|===
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 1:115: evaluation of [TO_DOUBLE(str2)] 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""`