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b7e3a1e14b
* delete asciidoc files
* add migrated files
* fix errors
* Disable docs tests
* Clarify release notes page titles
* Revert "Clarify release notes page titles"
This reverts commit 8be688648d.
* Comment out edternal URI images
* Clean up query languages landing pages, link to conceptual docs
* Add .md to url
* Fixes inference processor nesting.
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Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com>
Co-authored-by: Liam Thompson <leemthompo@gmail.com>
Co-authored-by: Martijn Laarman <Mpdreamz@gmail.com>
Co-authored-by: István Zoltán Szabó <szabosteve@gmail.com>
1.1 KiB
1.1 KiB
COALESCE [esql-coalesce]
Syntax
:::{image} ../../../../../images/coalesce.svg :alt: Embedded :class: text-center :::
Parameters
first- Expression to evaluate.
rest- Other expression to evaluate.
Description
Returns the first of its arguments that is not null. If all arguments are null, it returns null.
Supported types
| first | rest | result |
|---|---|---|
| boolean | boolean | boolean |
| boolean | boolean | |
| cartesian_point | cartesian_point | cartesian_point |
| cartesian_shape | cartesian_shape | cartesian_shape |
| date | date | date |
| date_nanos | date_nanos | date_nanos |
| geo_point | geo_point | geo_point |
| geo_shape | geo_shape | geo_shape |
| integer | integer | integer |
| integer | integer | |
| ip | ip | ip |
| keyword | keyword | keyword |
| keyword | keyword | |
| long | long | long |
| long | long | |
| text | text | keyword |
| text | keyword | |
| version | version | version |
Example
ROW a=null, b="b"
| EVAL COALESCE(a, b)
| a:null | b:keyword | COALESCE(a, b):keyword |
|---|---|---|
| null | b | b |