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03/07: Add extended statistics on package_derivations


From: Christopher Baines
Subject: 03/07: Add extended statistics on package_derivations
Date: Sat, 12 Nov 2022 05:59:12 -0500 (EST)

cbaines pushed a commit to branch master
in repository data-service.

commit fb9d99a076ac3b4211f6dd96e125ee8d5d1477ef
Author: Christopher Baines <mail@cbaines.net>
AuthorDate: Sat Nov 12 10:40:43 2022 +0000

    Add extended statistics on package_derivations
    
    This helps row count estimates when filtering on system_id and target.
---
 sqitch/deploy/package_derivations_extended_statistics.sql | 9 +++++++++
 sqitch/revert/package_derivations_extended_statistics.sql | 7 +++++++
 sqitch/sqitch.plan                                        | 1 +
 sqitch/verify/package_derivations_extended_statistics.sql | 7 +++++++
 4 files changed, 24 insertions(+)

diff --git a/sqitch/deploy/package_derivations_extended_statistics.sql 
b/sqitch/deploy/package_derivations_extended_statistics.sql
new file mode 100644
index 0000000..f1aeaaf
--- /dev/null
+++ b/sqitch/deploy/package_derivations_extended_statistics.sql
@@ -0,0 +1,9 @@
+-- Deploy guix-data-service:package_derivations_extended_statistics to pg
+
+BEGIN;
+
+CREATE STATISTICS package_derivations_mcv (mcv) ON system_id, target FROM 
package_derivations;
+
+CREATE STATISTICS package_derivations_ndistinct (ndistinct) ON system_id, 
target FROM package_derivations;
+
+COMMIT;
diff --git a/sqitch/revert/package_derivations_extended_statistics.sql 
b/sqitch/revert/package_derivations_extended_statistics.sql
new file mode 100644
index 0000000..65f3208
--- /dev/null
+++ b/sqitch/revert/package_derivations_extended_statistics.sql
@@ -0,0 +1,7 @@
+-- Revert guix-data-service:package_derivations_extended_statistics from pg
+
+BEGIN;
+
+-- XXX Add DDLs here.
+
+COMMIT;
diff --git a/sqitch/sqitch.plan b/sqitch/sqitch.plan
index 5af890d..8bc4aeb 100644
--- a/sqitch/sqitch.plan
+++ b/sqitch/sqitch.plan
@@ -90,3 +90,4 @@ fix_git_commits_duplicates 2022-06-17T10:39:50Z Chris 
<chris@felis> # Fix git_co
 git_repositories_query_substitutes 2022-09-09T11:35:16Z Chris <chris@felis> # 
Add git_repositories.query_substitutes
 package_derivations_id_package_id_idx 2022-09-14T09:24:30Z Chris <chris@felis> 
# Add index on package_derivations id and package_id
 blocked_builds 2022-11-07T11:27:28Z Chris <chris@felis> # Add blocked_builds
+package_derivations_extended_statistics 2022-11-12T10:40:18Z Chris 
<chris@felis> # Add extended statistics on package_derivations
diff --git a/sqitch/verify/package_derivations_extended_statistics.sql 
b/sqitch/verify/package_derivations_extended_statistics.sql
new file mode 100644
index 0000000..1053d91
--- /dev/null
+++ b/sqitch/verify/package_derivations_extended_statistics.sql
@@ -0,0 +1,7 @@
+-- Verify guix-data-service:package_derivations_extended_statistics on pg
+
+BEGIN;
+
+-- XXX Add verifications here.
+
+ROLLBACK;



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