Add relation name to indexes view

This adds the table name to the postgres_indexes view.

changelogs/unreleased/ab-reindex-functional-analyze.yml

+---
+title: Add relation name to indexes view
+merge_request: 47422
+author:
+type: other

db/migrate/20201111145317_add_relation_to_indexes_view.rb

+# frozen_string_literal: true
+
+class AddRelationToIndexesView < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def up
+    execute(<<~SQL)
+      DROP VIEW postgres_indexes;
+
+      CREATE VIEW postgres_indexes AS
+      SELECT (pg_namespace.nspname::text || '.'::text) || pg_class.relname::text AS identifier,
+        pg_index.indexrelid,
+        pg_namespace.nspname AS schema,
+        pg_class.relname AS name,
+        pg_indexes.tablename,
+        pg_index.indisunique AS "unique",
+        pg_index.indisvalid AS valid_index,
+        pg_class.relispartition AS partitioned,
+        pg_index.indisexclusion AS exclusion,
+        pg_index.indexprs IS NOT NULL as expression,
+        pg_index.indpred IS NOT NULL as partial,
+        pg_indexes.indexdef AS definition,
+        pg_relation_size(pg_class.oid::regclass) AS ondisk_size_bytes
+      FROM pg_index
+        JOIN pg_class ON pg_class.oid = pg_index.indexrelid
+        JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
+        JOIN pg_indexes ON pg_class.relname = pg_indexes.indexname
+      WHERE pg_namespace.nspname <> 'pg_catalog'::name
+        AND (pg_namespace.nspname = ANY (ARRAY["current_schema"(), 'gitlab_partitions_dynamic'::name, 'gitlab_partitions_static'::name]));
+    SQL
+  end
+
+  def down
+    execute(<<~SQL)
+      DROP VIEW postgres_indexes;
+
+      CREATE VIEW postgres_indexes AS
+      SELECT (pg_namespace.nspname::text || '.'::text) || pg_class.relname::text AS identifier,
+        pg_index.indexrelid,
+        pg_namespace.nspname AS schema,
+        pg_class.relname AS name,
+        pg_index.indisunique AS "unique",
+        pg_index.indisvalid AS valid_index,
+        pg_class.relispartition AS partitioned,
+        pg_index.indisexclusion AS exclusion,
+        pg_index.indexprs IS NOT NULL as expression,
+        pg_index.indpred IS NOT NULL as partial,
+        pg_indexes.indexdef AS definition,
+        pg_relation_size(pg_class.oid::regclass) AS ondisk_size_bytes
+      FROM pg_index
+        JOIN pg_class ON pg_class.oid = pg_index.indexrelid
+        JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
+        JOIN pg_indexes ON pg_class.relname = pg_indexes.indexname
+      WHERE pg_namespace.nspname <> 'pg_catalog'::name
+        AND (pg_namespace.nspname = ANY (ARRAY["current_schema"(), 'gitlab_partitions_dynamic'::name, 'gitlab_partitions_static'::name]));
+    SQL
+  end
+end

db/schema_migrations/20201111145317

+51d26848722466503e43b0f41e2fa43ee6073a16b358311a0aff6d77fbb12b1d
\ No newline at end of file

db/structure.sql

@@ -14897,6 +14897,7 @@ CREATE VIEW postgres_indexes AS
     pg_index.indexrelid,
     pg_namespace.nspname AS schema,
     pg_class.relname AS name,
+    pg_indexes.tablename,
     pg_index.indisunique AS "unique",
     pg_index.indisvalid AS valid_index,
     pg_class.relispartition AS partitioned,