1 files changed, 84 insertions, 0 deletions
diff --git a/internal/db/bundb/migrations/20240426122821_pageable_admin_accounts.go b/internal/db/bundb/migrations/20240426122821_pageable_admin_accounts.go
new file mode 100644
index 000000000..00465cc85
--- /dev/null
+++ b/internal/db/bundb/migrations/20240426122821_pageable_admin_accounts.go
@@ -0,0 +1,84 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package migrations
+
+import (
+	"context"
+
+	"github.com/superseriousbusiness/gotosocial/internal/log"
+	"github.com/uptrace/bun"
+	"github.com/uptrace/bun/dialect"
+)
+
+func init() {
+	up := func(ctx context.Context, db *bun.DB) error {
+		log.Info(ctx, "reindexing accounts (accounts_paging_idx); this may take a few minutes, please don't interrupt this migration!")
+
+		q := db.NewCreateIndex().
+			TableExpr("accounts").
+			Index("accounts_paging_idx").
+			IfNotExists()
+
+		switch d := db.Dialect().Name(); d {
+		case dialect.SQLite:
+			q = q.ColumnExpr(
+				"COALESCE(?, ?) || ? || ?",
+				bun.Ident("domain"), "",
+				"/@",
+				bun.Ident("username"),
+			)
+
+		// Specify C collation for Postgres to ensure
+		// alphabetic sort order is similar enough to
+		// SQLite (which uses BINARY sort by default).
+		//
+		// See:
+		//
+		//   - https://www.postgresql.org/docs/current/collation.html#COLLATION-MANAGING-STANDARD
+		//   - https://sqlite.org/datatype3.html#collation
+		case dialect.PG:
+			q = q.ColumnExpr(
+				"(COALESCE(?, ?) || ? || ?) COLLATE ?",
+				bun.Ident("domain"), "",
+				"/@",
+				bun.Ident("username"),
+				bun.Ident("C"),
+			)
+
+		default:
+			log.Panicf(ctx, "dialect %s was neither postgres nor sqlite", d)
+		}
+
+		if _, err := q.Exec(ctx); err != nil {
+			return err
+		}
+
+		return nil
+
+	}
+
+	down := func(ctx context.Context, db *bun.DB) error {
+		return db.RunInTx(ctx, nil, func(ctx context.Context, tx bun.Tx) error {
+			return nil
+		})
+	}
+
+	if err := Migrations.Register(up, down); err != nil {
+		panic(err)
+	}
+}