diff options
Diffstat (limited to 'platform/default/include/mbgl/storage/merge_sideloaded.sql')
-rw-r--r-- | platform/default/include/mbgl/storage/merge_sideloaded.sql | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/platform/default/include/mbgl/storage/merge_sideloaded.sql b/platform/default/include/mbgl/storage/merge_sideloaded.sql new file mode 100644 index 0000000000..55345a6f15 --- /dev/null +++ b/platform/default/include/mbgl/storage/merge_sideloaded.sql @@ -0,0 +1,51 @@ +INSERT INTO regions + SELECT DISTINCT NULL, sr.definition, sr.description -- Merge duplicate regions + FROM side.regions sr + LEFT JOIN regions r ON sr.definition = r.definition AND sr.description IS r.description + WHERE r.definition IS NULL; + +CREATE TEMPORARY TABLE region_mapping AS + SELECT sr.id AS side_region_id, + r.id AS main_region_id + FROM side.regions sr + JOIN regions r ON sr.definition = r.definition AND sr.description IS r.description; + +--Insert /Update tiles +REPLACE INTO tiles + SELECT t.id, -- use the old ID in case we run a REPLACE. If it doesn't exist yet, it'll be NULL which will auto-assign a new ID. + st.url_template, st.pixel_ratio, st.z, st.x, st.y, + st.expires, st.modified, st.etag, st.data, st.compressed, st.accessed, st.must_revalidate + FROM (SELECT DISTINCT sti.* FROM side.region_tiles srt JOIN side.tiles sti ON srt.tile_id = sti.id) -- ensure that we're only considering region tiles, and not ambient tiles. + AS st + LEFT JOIN tiles t ON st.url_template = t.url_template AND st.pixel_ratio = t.pixel_ratio AND st.z = t.z AND st.x = t.x AND st.y = t.y + WHERE t.id IS NULL -- only consider tiles that don't exist yet in the original database. + OR st.modified > t.modified; -- ...or tiles that are newer in the side loaded DB. + +-- Update region_tiles usage +INSERT OR IGNORE INTO region_tiles + SELECT rm.main_region_id, sti.id + FROM side.region_tiles srt + JOIN region_mapping rm ON srt.region_id = rm.side_region_id + JOIN (SELECT t.id, st.id AS side_tile_id FROM side.tiles st + JOIN tiles t ON st.url_template = t.url_template AND st.pixel_ratio = t.pixel_ratio AND st.z = t.z AND st.x = t.x AND st.y = t.y + ) AS sti ON srt.tile_id = sti.side_tile_id; + +-- copy over resources +REPLACE INTO resources + SELECT r.id, + sr.url, sr.kind, sr.expires, sr.modified, sr.etag, + sr.data, sr.compressed, sr.accessed, sr.must_revalidate + FROM side.region_resources srr JOIN side.resources sr ON srr.resource_id = sr.id --only consider region resources, and not ambient resources. + LEFT JOIN resources r ON sr.url = r.url + WHERE r.id IS NULL -- only consider resources that don't exist yet in the main database + OR sr.modified > r.modified; -- ...or resources that are newer in the side loaded DB. + +-- Update region_resources usage +INSERT OR IGNORE INTO region_resources + SELECT rm.main_region_id, sri.id + FROM side.region_resources srr + JOIN region_mapping rm ON srr.region_id = rm.side_region_id + JOIN (SELECT r.id, sr.id AS side_resource_id FROM side.resources sr + JOIN resources r ON sr.url = r.url) AS sri ON srr.resource_id = sri.side_resource_id; + +DROP TABLE region_mapping;
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