125 lines
3.2 KiB
Go
125 lines
3.2 KiB
Go
package migrations
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import (
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"context"
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"time"
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"git.handmade.network/hmn/hmn/src/migration/types"
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"git.handmade.network/hmn/hmn/src/oops"
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"github.com/jackc/pgx/v5"
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)
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func init() {
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registerMigration(AddCommonFieldsToPosts{})
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}
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type AddCommonFieldsToPosts struct{}
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func (m AddCommonFieldsToPosts) Version() types.MigrationVersion {
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return types.MigrationVersion(time.Date(2021, 4, 26, 23, 57, 20, 0, time.UTC))
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}
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func (m AddCommonFieldsToPosts) Name() string {
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return "AddCommonFieldsToPosts"
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}
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func (m AddCommonFieldsToPosts) Description() string {
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return "Adds project and category info directly to posts for more efficient queries"
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}
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func (m AddCommonFieldsToPosts) Up(ctx context.Context, tx pgx.Tx) error {
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_, err := tx.Exec(ctx,
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`
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ALTER TABLE handmade_post
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ADD category_kind INT,
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ADD project_id INT REFERENCES handmade_project (id) ON DELETE RESTRICT;
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`,
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)
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if err != nil {
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return oops.New(err, "failed to add columns")
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}
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_, err = tx.Exec(ctx,
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`
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UPDATE handmade_post
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SET (category_id, category_kind, project_id) = (
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SELECT cat.id, cat.kind, cat.project_id
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FROM
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handmade_category AS cat
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JOIN handmade_thread AS thread ON thread.category_id = cat.id
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JOIN handmade_post AS post ON post.thread_id = thread.id
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WHERE
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post.id = handmade_post.id
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)
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`,
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)
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if err != nil {
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return oops.New(err, "failed to migrate data from categories")
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}
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_, err = tx.Exec(ctx,
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`
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CREATE FUNCTION category_id_for_thread(int) returns int as $$
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SELECT thread.category_id
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FROM handmade_thread AS thread
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WHERE thread.id = $1
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$$ LANGUAGE SQL;
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CREATE FUNCTION category_kind_for_post(int) returns int as $$
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SELECT cat.kind
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FROM
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handmade_post AS post
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JOIN handmade_thread AS thread ON post.thread_id = thread.id
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JOIN handmade_category AS cat ON thread.category_id = cat.id
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WHERE post.id = $1
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$$ LANGUAGE SQL;
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CREATE FUNCTION project_id_for_post(int) returns int as $$
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SELECT cat.project_id
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FROM
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handmade_post AS post
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JOIN handmade_thread AS thread ON post.thread_id = thread.id
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JOIN handmade_category AS cat ON thread.category_id = cat.id
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WHERE post.id = $1
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$$ LANGUAGE SQL;
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ALTER TABLE handmade_post
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ALTER category_kind SET NOT NULL,
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ALTER thread_id SET NOT NULL,
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ALTER project_id SET NOT NULL,
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ADD CONSTRAINT post_category_id_from_thread CHECK (
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category_id_for_thread(thread_id) = category_id
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),
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ADD CONSTRAINT post_category_kind_from_category CHECK (
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category_kind_for_post(id) = category_kind
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),
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ADD CONSTRAINT post_project_id_from_category CHECK (
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project_id_for_post(id) = project_id
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);
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`,
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)
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if err != nil {
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return oops.New(err, "failed to add constraints")
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}
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_, err = tx.Exec(ctx,
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`
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CREATE INDEX post_project_id ON handmade_post (project_id);
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CREATE INDEX post_category_kind ON handmade_post (category_kind);
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CREATE INDEX post_postdate ON handmade_post (postdate DESC);
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CREATE INDEX clri_user_id ON handmade_categorylastreadinfo (user_id);
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CREATE INDEX tlri_user_id ON handmade_threadlastreadinfo (user_id);
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`,
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)
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if err != nil {
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return oops.New(err, "failed to create indexes")
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}
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return nil
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}
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func (m AddCommonFieldsToPosts) Down(ctx context.Context, tx pgx.Tx) error {
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panic("Implement me")
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}
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