Improved analyze for declarative partitioning

Author: ankane

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.7.1 (unreleased)
+
+- Improved `analyze` for declarative partitioning
+
 ## 0.7.0 (2025-05-26)
 
 - Dropped support for Ruby < 3

lib/pgslice/cli/analyze.rb

@@ -6,7 +6,8 @@ def analyze(table)
       table = create_table(table)
       parent_table = options[:swapped] ? table : table.intermediate_table
 
-      analyze_list = parent_table.partitions + [parent_table]
+      _, _, _, _, declarative, _ = parent_table.fetch_settings(table.trigger_name)
+      analyze_list = declarative ? [parent_table] : (parent_table.partitions + [parent_table])
       run_queries_without_transaction(analyze_list.map { |t| "ANALYZE VERBOSE #{quote_table(t)};" })
     end
   end

test/pgslice_test.rb

@@ -119,6 +119,9 @@ def assert_period(period, column: "createdAt", trigger_based: false, tablespace:
     $conn.exec('INSERT INTO "Posts" ("' + column + '") VALUES (\'' + now.iso8601 + '\') RETURNING "Id"').first
 
     run_command "analyze Posts"
+    last_analyzed = $conn.exec("SELECT relname, EXTRACT(EPOCH FROM NOW() - last_analyze) AS last_analyzed FROM pg_stat_all_tables WHERE relname LIKE 'Posts_%'").to_a
+    assert_equal 4, last_analyzed.size
+    assert last_analyzed.all? { |v| v["last_analyzed"].to_f < 0.01 }
 
     # TODO check sequence ownership
     output = run_command "swap Posts"