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docs: describe more explicitly what happens when indexing queries that fetch terms

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Martijn van Groningen 2016-09-22 10:00:11 +00:00
parent 9565023654
commit ad7c22198c
1 changed files with 4 additions and 1 deletions
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5
docs/reference/mapping/types/percolator.asciidoc
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@ -82,4 +82,7 @@ time (using `now`).
There are a number of queries that fetch data via a get call during query parsing. For example the `terms` query when There are a number of queries that fetch data via a get call during query parsing. For example the `terms` query when
using terms lookup, `template` query when using indexed scripts and `geo_shape` when using pre-indexed shapes. When these using terms lookup, `template` query when using indexed scripts and `geo_shape` when using pre-indexed shapes. When these
queries are indexed by the `percolator` field type then the get call is executed once. So each time the `percolator` queries are indexed by the `percolator` field type then the get call is executed once. So each time the `percolator`
query evaluates these queries, the fetches terms, shapes etc. as the were upon index time will be used. query evaluates these queries, the fetches terms, shapes etc. as the were upon index time will be used. Important to note
is that fetching of terms that these queries do, happens both each time the percolator query gets indexed on both primary
and replica shards, so the terms that are actually indexed can be different between shard copies, if the source index
changed while indexing.