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docs: migration to new wikipedia needs new index

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Fixes #1998.
This commit is contained in:
Sarah Hoffmann 2020-10-11 10:40:23 +02:00
parent f7a9462337
commit 3b23144ae6
1 changed files with 6 additions and 0 deletions
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docs/admin/Migration.md
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@ -53,6 +53,12 @@ follows:
* download the new Wikipedia tables as described in the import section
* reimport the tables: `./utils/setup.php --import-wikipedia-articles`
* update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
* create a new lookup index:
```
CREATE INDEX idx_placex_wikidata on placex
USING BTREE ((extratags -> 'wikidata'))
WHERE extratags ? 'wikidata' and class = 'place' and osm_type = 'N' and rank_search < 26
```
* compute importance: `./utils/update.php --recompute-importance`
The last step takes about 10 hours on the full planet.