Remove unused partition_offset_table (#2288)

1 files changed, 0 insertions, 133 deletions

diff --git a/internal/sqlutil/partition_offset_table.go b/internal/sqlutil/partition_offset_table.go
deleted file mode 100644
index e19a092f..00000000
--- a/internal/sqlutil/partition_offset_table.go
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright 2020 The Matrix.org Foundation C.I.C.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package sqlutil
-
-import (
-	"context"
-	"database/sql"
-	"strings"
-)
-
-// A PartitionOffset is the offset into a partition of the input log.
-type PartitionOffset struct {
-	// The ID of the partition.
-	Partition int32
-	// The offset into the partition.
-	Offset int64
-}
-
-const partitionOffsetsSchema = `
--- The offsets that the server has processed up to.
-CREATE TABLE IF NOT EXISTS ${prefix}_partition_offsets (
-    -- The name of the topic.
-    topic TEXT NOT NULL,
-    -- The 32-bit partition ID
-    partition INTEGER NOT NULL,
-    -- The 64-bit offset.
-    partition_offset BIGINT NOT NULL,
-    UNIQUE (topic, partition)
-);
-`
-
-const selectPartitionOffsetsSQL = "" +
-	"SELECT partition, partition_offset FROM ${prefix}_partition_offsets WHERE topic = $1"
-
-const upsertPartitionOffsetsSQL = "" +
-	"INSERT INTO ${prefix}_partition_offsets (topic, partition, partition_offset) VALUES ($1, $2, $3)" +
-	" ON CONFLICT (topic, partition)" +
-	" DO UPDATE SET partition_offset = $3"
-
-// PartitionOffsetStatements represents a set of statements that can be run on a partition_offsets table.
-type PartitionOffsetStatements struct {
-	db                         *sql.DB
-	writer                     Writer
-	selectPartitionOffsetsStmt *sql.Stmt
-	upsertPartitionOffsetStmt  *sql.Stmt
-}
-
-// Prepare converts the raw SQL statements into prepared statements.
-// Takes a prefix to prepend to the table name used to store the partition offsets.
-// This allows multiple components to share the same database schema.
-func (s *PartitionOffsetStatements) Prepare(db *sql.DB, writer Writer, prefix string) (err error) {
-	s.db = db
-	s.writer = writer
-	_, err = db.Exec(strings.Replace(partitionOffsetsSchema, "${prefix}", prefix, -1))
-	if err != nil {
-		return
-	}
-	if s.selectPartitionOffsetsStmt, err = db.Prepare(
-		strings.Replace(selectPartitionOffsetsSQL, "${prefix}", prefix, -1),
-	); err != nil {
-		return
-	}
-	if s.upsertPartitionOffsetStmt, err = db.Prepare(
-		strings.Replace(upsertPartitionOffsetsSQL, "${prefix}", prefix, -1),
-	); err != nil {
-		return
-	}
-	return
-}
-
-// PartitionOffsets implements PartitionStorer
-func (s *PartitionOffsetStatements) PartitionOffsets(
-	ctx context.Context, topic string,
-) ([]PartitionOffset, error) {
-	return s.selectPartitionOffsets(ctx, topic)
-}
-
-// SetPartitionOffset implements PartitionStorer
-func (s *PartitionOffsetStatements) SetPartitionOffset(
-	ctx context.Context, topic string, partition int32, offset int64,
-) error {
-	return s.upsertPartitionOffset(ctx, topic, partition, offset)
-}
-
-// selectPartitionOffsets returns all the partition offsets for the given topic.
-func (s *PartitionOffsetStatements) selectPartitionOffsets(
-	ctx context.Context, topic string,
-) (results []PartitionOffset, err error) {
-	rows, err := s.selectPartitionOffsetsStmt.QueryContext(ctx, topic)
-	if err != nil {
-		return nil, err
-	}
-	defer checkNamedErr(rows.Close, &err)
-	for rows.Next() {
-		var offset PartitionOffset
-		if err = rows.Scan(&offset.Partition, &offset.Offset); err != nil {
-			return nil, err
-		}
-		results = append(results, offset)
-	}
-	err = rows.Err()
-	return results, err
-}
-
-// checkNamedErr calls fn and overwrite err if it was nil and fn returned non-nil
-func checkNamedErr(fn func() error, err *error) {
-	if e := fn(); e != nil && *err == nil {
-		*err = e
-	}
-}
-
-// UpsertPartitionOffset updates or inserts the partition offset for the given topic.
-func (s *PartitionOffsetStatements) upsertPartitionOffset(
-	ctx context.Context, topic string, partition int32, offset int64,
-) error {
-	return s.writer.Do(s.db, nil, func(txn *sql.Tx) error {
-		stmt := TxStmt(txn, s.upsertPartitionOffsetStmt)
-		_, err := stmt.ExecContext(ctx, topic, partition, offset)
-		return err
-	})
-}