113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
/*
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Copyright 2023 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package sqlite
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import (
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"context"
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"database/sql"
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"database/sql/driver"
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"fmt"
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"strings"
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commonsql "github.com/dapr/components-contrib/common/component/sql"
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sqlitemigrations "github.com/dapr/components-contrib/common/component/sql/migrations/sqlite"
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"github.com/dapr/kit/logger"
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sqlite3 "modernc.org/sqlite"
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)
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type migrationOptions struct {
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StateTableName string
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MetadataTableName string
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}
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func registerFuntions() {
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sqlite3.RegisterDeterministicScalarFunction(
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"parse_key_prefix",
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1,
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func(ctx *sqlite3.FunctionContext, args []driver.Value) (driver.Value, error) {
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var s1 string
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switch arg0 := args[0].(type) {
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case string:
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s1 = arg0
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default:
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return "", fmt.Errorf("expected argv[0] to be text")
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}
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if len(s1) == 0 {
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return "", fmt.Errorf("cannot create prefix for empty string")
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}
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lastIndex := strings.LastIndex(s1, "||")
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if lastIndex != -1 {
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return s1[:lastIndex+2], nil
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}
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return "", nil
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},
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)
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}
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// Perform the required migrations
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func performMigrations(ctx context.Context, db *sql.DB, logger logger.Logger, opts migrationOptions) error {
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m := sqlitemigrations.Migrations{
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Pool: db,
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Logger: logger,
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MetadataTableName: opts.MetadataTableName,
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MetadataKey: "migrations",
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}
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return m.Perform(ctx, []commonsql.MigrationFn{
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// Migration 0: create the state table
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func(ctx context.Context) error {
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// We need to add an "IF NOT EXISTS" because we may be migrating from when we did not use a metadata table
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logger.Infof("Creating state table '%s'", opts.StateTableName)
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_, err := m.GetConn().ExecContext(
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ctx,
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fmt.Sprintf(
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`CREATE TABLE IF NOT EXISTS %s (
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key TEXT NOT NULL PRIMARY KEY,
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value TEXT NOT NULL,
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is_binary BOOLEAN NOT NULL,
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etag TEXT NOT NULL,
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expiration_time TIMESTAMP DEFAULT NULL,
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update_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
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)`,
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opts.StateTableName,
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),
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)
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if err != nil {
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return fmt.Errorf("failed to create state table: %w", err)
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}
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return nil
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},
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// Migration 1: add the "prefix" column
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func(ctx context.Context) error {
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// Add the "prefix" column that can be used by DeleteWithPrefix
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logger.Infof("Adding 'prefix' column to table '%s'", opts.StateTableName)
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_, err := m.GetConn().ExecContext(
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ctx,
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fmt.Sprintf(
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`ALTER TABLE %[1]s ADD COLUMN prefix TEXT GENERATED ALWAYS AS (parse_key_prefix(key)) VIRTUAL;
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CREATE INDEX %[1]s_prefix_index ON %[1]s(prefix) WHERE prefix != ""`,
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opts.StateTableName,
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),
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)
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if err != nil {
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return fmt.Errorf("failed to create virtual column: %w", err)
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}
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return nil
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},
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},
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)
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}
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