From 64be52844e679d205d959ea06d50c44366c39097 Mon Sep 17 00:00:00 2001 From: Christopher Baines Date: Mon, 23 May 2022 19:10:25 +0100 Subject: Partition the package_derivations_by_guix_revision_range table And create a proper git_branches table in the process. I'm hoping this will help with slow deletions from the package_derivations_by_guix_revision_range table in the case where there are lots of branches, since it'll separate the data for one branch from another. These migrations will remove the existing data, so rebuild-package-derivations-table will currently need manually running to regenerate it. --- sqitch/deploy/git_branch_id.sql | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 sqitch/deploy/git_branch_id.sql (limited to 'sqitch/deploy/git_branch_id.sql') diff --git a/sqitch/deploy/git_branch_id.sql b/sqitch/deploy/git_branch_id.sql new file mode 100644 index 0000000..9da071c --- /dev/null +++ b/sqitch/deploy/git_branch_id.sql @@ -0,0 +1,32 @@ +-- Deploy guix-data-service:git_branch_id to pg + +BEGIN; + +ALTER TABLE git_branches RENAME TO git_branches_old; + +CREATE TABLE git_branches ( + id integer PRIMARY KEY GENERATED ALWAYS AS IDENTITY, + name character varying NOT NULL, + git_repository_id integer NOT NULL REFERENCES git_repositories (id), + CONSTRAINT git_repository_id_name_unique UNIQUE (git_repository_id, name) +); + +CREATE TABLE git_commits ( + id integer PRIMARY KEY GENERATED ALWAYS AS IDENTITY, + commit character varying NOT NULL, + git_branch_id integer NOT NULL REFERENCES git_branches (id), + datetime timestamp without time zone NOT NULL +); + +INSERT INTO git_branches (name, git_repository_id) + SELECT DISTINCT name, git_repository_id + FROM git_branches_old; + +INSERT INTO git_commits (commit, git_branch_id, datetime) + SELECT commit, git_branches.id, datetime + FROM git_branches_old + INNER JOIN git_branches + ON git_branches_old.name = git_branches.name + AND git_branches_old.git_repository_id = git_branches.git_repository_id; + +COMMIT; -- cgit v1.2.3