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[DOCS] [7.x] Document deprecation of storing nanosecond resolution on date field (#79554)

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relates #78921
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Przemyslaw Gomulka 2021-10-20 15:37:07 +02:00 • committed by GitHub
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docs/reference/migration/migrate_7_16.asciidoc
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@ -347,4 +347,19 @@ cache do not expire.
To override the defaults, configure the `script.cache.max_size`,
`script.max_compilations_rate`, and `script.cache.expire` settings.
====
.Attempting to store nanosecond resolution in a `date` field is deprecated.
[%collapsible]
====
*Details* +
Attempting to store a nanosecond resolution in a {ref}/date.html[`date`] field is deprecated.
While previously allowed, these attempts always resulted in resolution loss.
A `date` field can only store up to millisecond resolutions.
*Impact* +
If you attempt to store a nanosecond resolution in a `date` type field, {es} will
emit a deprecation warning. To avoid deprecation warnings, use a
{ref}/date_nanos.html[`date_nanos`] field instead.
====
// end::notable-breaking-changes[]