Optimize the master_index_stats view

Signed-off-by: Graham <gpe@openrs2.org>

archive/src/main/kotlin/org/openrs2/archive/cache/CacheImporter.kt

@@ -860,6 +860,14 @@ public class CacheImporter @Inject constructor(
 
     public suspend fun refreshViews() {
         database.execute { connection ->
+            connection.prepareStatement(
+                """
+                REFRESH MATERIALIZED VIEW CONCURRENTLY index_stats
+            """.trimIndent()
+            ).use { stmt ->
+                stmt.execute()
+            }
+
             connection.prepareStatement(
                 """
                 REFRESH MATERIALIZED VIEW CONCURRENTLY master_index_stats

archive/src/main/resources/org/openrs2/archive/migrations/V7__opt_view.sql

@@ -0,0 +1,65 @@
+-- @formatter:off
+CREATE MATERIALIZED VIEW index_stats (
+    archive_id,
+    container_id,
+    valid_groups,
+    groups,
+    valid_keys,
+    keys,
+    size,
+    blocks
+) AS
+SELECT
+    g.group_id AS archive_id,
+    i.container_id,
+    COUNT(*) FILTER (WHERE c.id IS NOT NULL) AS valid_groups,
+    COUNT(*) AS groups,
+    COUNT(*) FILTER (WHERE c.encrypted AND (c.key_id IS NOT NULL OR c.empty_loc)) AS valid_keys,
+    COUNT(*) FILTER (WHERE c.encrypted) AS keys,
+    SUM(length(c.data)) FILTER (WHERE c.id IS NOT NULL) AS size,
+    SUM(group_blocks(ig.group_id, length(c.data))) FILTER (WHERE c.id IS NOT NULL) AS blocks
+FROM indexes i
+JOIN groups g ON g.container_id = i.container_id AND g.archive_id = 255 AND NOT g.version_truncated AND
+    g.version = i.version
+JOIN index_groups ig ON ig.container_id = i.container_id
+LEFT JOIN resolve_group(g.group_id::uint1, ig.group_id, ig.crc32, ig.version) c ON TRUE
+GROUP BY g.group_id, i.container_id;
+
+CREATE UNIQUE INDEX ON index_stats (container_id);
+
+CREATE MATERIALIZED VIEW master_index_stats_new (
+    master_index_id,
+    valid_indexes,
+    indexes,
+    valid_groups,
+    groups,
+    valid_keys,
+    keys,
+    size,
+    blocks
+) AS
+SELECT
+    m.id,
+    COUNT(*) FILTER (WHERE c.id IS NOT NULL OR (a.version = 0 AND a.crc32 = 0)) AS valid_indexes,
+    COUNT(*) FILTER (WHERE a.master_index_id IS NOT NULL) AS indexes,
+    SUM(COALESCE(s.valid_groups, 0)) AS valid_groups,
+    SUM(COALESCE(s.groups, 0)) AS groups,
+    SUM(COALESCE(s.valid_keys, 0)) AS valid_keys,
+    SUM(COALESCE(s.keys, 0)) AS keys,
+    SUM(COALESCE(s.size, 0)) + SUM(COALESCE(length(c.data), 0)) AS size,
+    SUM(COALESCE(s.blocks, 0)) + SUM(COALESCE(group_blocks(a.archive_id, length(c.data)), 0)) AS blocks
+FROM master_indexes m
+LEFT JOIN master_index_archives a ON a.master_index_id = m.id
+LEFT JOIN resolve_index(a.archive_id, a.crc32, a.version) c ON TRUE
+LEFT JOIN index_stats s ON s.archive_id = a.archive_id AND s.container_id = c.id
+GROUP BY m.id;
+
+CREATE UNIQUE INDEX ON master_index_stats_new (master_index_id);
+
+ALTER MATERIALIZED VIEW master_index_stats RENAME TO master_index_stats_old;
+ALTER INDEX master_index_stats_master_index_id_idx RENAME TO master_index_stats_old_master_index_id_idx;
+
+ALTER MATERIALIZED VIEW master_index_stats_new RENAME TO master_index_stats;
+ALTER INDEX master_index_stats_new_master_index_id_idx RENAME TO master_index_stats_master_index_id_idx;
+
+DROP MATERIALIZED VIEW master_index_stats_old;