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migration.go
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migration.go
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/*
Copyright 2021 The Dapr Authors
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 sqlserver
import (
"database/sql"
"fmt"
"strings"
)
type migrator interface {
executeMigrations() (migrationResult, error)
}
type migration struct {
store *SQLServer
}
type migrationResult struct {
bulkDeleteProcName string
bulkDeleteProcFullName string
itemRefTableTypeName string
upsertProcName string
upsertProcFullName string
pkColumnType string
getCommand string
deleteWithETagCommand string
deleteWithoutETagCommand string
}
func newMigration(store *SQLServer) migrator {
return &migration{
store: store,
}
}
func (m *migration) newMigrationResult() migrationResult {
r := migrationResult{
bulkDeleteProcName: fmt.Sprintf("sp_BulkDelete_%s", m.store.tableName),
itemRefTableTypeName: fmt.Sprintf("[%s].%s_Table", m.store.schema, m.store.tableName),
upsertProcName: fmt.Sprintf("sp_Upsert_v2_%s", m.store.tableName),
getCommand: fmt.Sprintf("SELECT [Data], [RowVersion] FROM [%s].[%s] WHERE [Key] = @Key", m.store.schema, m.store.tableName),
deleteWithETagCommand: fmt.Sprintf(`DELETE [%s].[%s] WHERE [Key]=@Key AND [RowVersion]=@RowVersion`, m.store.schema, m.store.tableName),
deleteWithoutETagCommand: fmt.Sprintf(`DELETE [%s].[%s] WHERE [Key]=@Key`, m.store.schema, m.store.tableName),
}
r.bulkDeleteProcFullName = fmt.Sprintf("[%s].%s", m.store.schema, r.bulkDeleteProcName)
r.upsertProcFullName = fmt.Sprintf("[%s].%s", m.store.schema, r.upsertProcName)
// nolint: exhaustive
switch m.store.keyType {
case StringKeyType:
r.pkColumnType = fmt.Sprintf("NVARCHAR(%d)", m.store.keyLength)
case UUIDKeyType:
r.pkColumnType = "uniqueidentifier"
case IntegerKeyType:
r.pkColumnType = "int"
}
return r
}
/* #nosec. */
func (m *migration) executeMigrations() (migrationResult, error) {
r := m.newMigrationResult()
db, err := sql.Open("sqlserver", m.store.connectionString)
if err != nil {
return r, err
}
// If the user provides a database in the connection string to not attempt
// to create the database. This work as the component did before adding the
// support to create the db.
if strings.Contains(m.store.connectionString, "database=") {
// Schedule close of connection
defer db.Close()
} else {
err = m.ensureDatabaseExists(db)
if err != nil {
return r, fmt.Errorf("failed to create db database: %v", err)
}
// Close the existing connection
db.Close()
// Re connect with a database specific connection
m.store.connectionString = fmt.Sprintf("%s;database=%s;", m.store.connectionString, m.store.databaseName)
db, err = sql.Open("sqlserver", m.store.connectionString)
if err != nil {
return r, err
}
// Schedule close of new connection
defer db.Close()
}
err = m.ensureSchemaExists(db)
if err != nil {
return r, fmt.Errorf("failed to create db schema: %v", err)
}
err = m.ensureTableExists(db, r)
if err != nil {
return r, fmt.Errorf("failed to create db table: %v", err)
}
err = m.ensureStoredProcedureExists(db, r)
if err != nil {
return r, fmt.Errorf("failed to create stored procedures: %v", err)
}
for _, ix := range m.store.indexedProperties {
err = m.ensureIndexedPropertyExists(ix, db)
if err != nil {
return r, err
}
}
return r, nil
}
func runCommand(tsql string, db *sql.DB) error {
if _, err := db.Exec(tsql); err != nil {
return err
}
return nil
}
/* #nosec. */
func (m *migration) ensureIndexedPropertyExists(ix IndexedProperty, db *sql.DB) error {
indexName := "IX_" + ix.ColumnName
tsql := fmt.Sprintf(`
IF (NOT EXISTS(SELECT object_id
FROM sys.indexes
WHERE object_id = OBJECT_ID('[%s].%s')
AND name='%s'))
CREATE INDEX %s ON [%s].[%s]([%s])`,
m.store.schema,
m.store.tableName,
indexName,
indexName,
m.store.schema,
m.store.tableName,
ix.ColumnName)
return runCommand(tsql, db)
}
/* #nosec. */
func (m *migration) ensureDatabaseExists(db *sql.DB) error {
tsql := fmt.Sprintf(`
IF NOT EXISTS (SELECT * FROM sys.databases WHERE name = N'%s')
CREATE DATABASE [%s]`,
m.store.databaseName, m.store.databaseName)
return runCommand(tsql, db)
}
/* #nosec. */
func (m *migration) ensureSchemaExists(db *sql.DB) error {
tsql := fmt.Sprintf(`
IF NOT EXISTS(SELECT * FROM sys.schemas WHERE name = N'%s')
EXEC('CREATE SCHEMA [%s]')`,
m.store.schema, m.store.schema)
return runCommand(tsql, db)
}
/* #nosec. */
func (m *migration) ensureTableExists(db *sql.DB, r migrationResult) error {
tsql := fmt.Sprintf(`
IF NOT EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '%s' AND TABLE_NAME = '%s')
CREATE TABLE [%s].[%s] (
[Key] %s CONSTRAINT PK_%s PRIMARY KEY,
[Data] NVARCHAR(MAX) NOT NULL,
[InsertDate] DateTime2 NOT NULL DEFAULT(GETDATE()),
[UpdateDate] DateTime2 NULL,`,
m.store.schema, m.store.tableName, m.store.schema, m.store.tableName, r.pkColumnType, m.store.tableName)
if m.store.indexedProperties != nil {
for _, prop := range m.store.indexedProperties {
if prop.Type != "" {
tsql += fmt.Sprintf("\n [%s] AS CONVERT(%s, JSON_VALUE(Data, '$.%s')) PERSISTED,", prop.ColumnName, prop.Type, prop.Property)
} else {
tsql += fmt.Sprintf("\n [%s] AS JSON_VALUE(Data, '$.%s') PERSISTED,", prop.ColumnName, prop.Property)
}
}
}
tsql += `
[RowVersion] ROWVERSION NOT NULL)
`
return runCommand(tsql, db)
}
/* #nosec. */
func (m *migration) ensureTypeExists(db *sql.DB, mr migrationResult) error {
tsql := fmt.Sprintf(`
IF type_id('[%s].%s_Table') IS NULL
CREATE TYPE [%s].%s_Table AS TABLE
(
[Key] %s NOT NULL,
[RowVersion] BINARY(8)
)
`, m.store.schema, m.store.tableName, m.store.schema, m.store.tableName, mr.pkColumnType)
return runCommand(tsql, db)
}
/* #nosec. */
func (m *migration) ensureBulkDeleteStoredProcedureExists(db *sql.DB, mr migrationResult) error {
tsql := fmt.Sprintf(`
CREATE PROCEDURE %s
@itemsToDelete %s READONLY
AS
DELETE [%s].[%s]
FROM [%s].[%s] x
JOIN @itemsToDelete i ON i.[Key] = x.[Key] AND (i.[RowVersion] IS NULL OR i.[RowVersion] = x.[RowVersion])`,
mr.bulkDeleteProcFullName,
mr.itemRefTableTypeName,
m.store.schema,
m.store.tableName,
m.store.schema,
m.store.tableName)
return m.createStoredProcedureIfNotExists(db, mr.bulkDeleteProcName, tsql)
}
func (m *migration) ensureStoredProcedureExists(db *sql.DB, mr migrationResult) error {
err := m.ensureTypeExists(db, mr)
if err != nil {
return err
}
err = m.ensureBulkDeleteStoredProcedureExists(db, mr)
if err != nil {
return err
}
err = m.ensureUpsertStoredProcedureExists(db, mr)
if err != nil {
return err
}
return nil
}
/* #nosec. */
func (m *migration) createStoredProcedureIfNotExists(db *sql.DB, name string, escapedDefinition string) error {
tsql := fmt.Sprintf(`
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[%s].[%s]') AND type in (N'P', N'PC'))
BEGIN
execute ('%s')
END`,
m.store.schema,
name,
escapedDefinition)
return runCommand(tsql, db)
}
/* #nosec. */
func (m *migration) ensureUpsertStoredProcedureExists(db *sql.DB, mr migrationResult) error {
tsql := fmt.Sprintf(`
CREATE PROCEDURE %s (
@Key %s,
@Data NVARCHAR(MAX),
@RowVersion BINARY(8),
@FirstWrite BIT)
AS
IF (@FirstWrite=1)
BEGIN
IF (@RowVersion IS NOT NULL)
BEGIN
BEGIN TRANSACTION;
IF NOT EXISTS (SELECT * FROM [%s] WHERE [KEY]=@KEY AND RowVersion = @RowVersion)
BEGIN
THROW 2601, ''FIRST-WRITE: COMPETING RECORD ALREADY WRITTEN.'', 1
END
BEGIN
UPDATE [%s]
SET [Data]=@Data, UpdateDate=GETDATE()
WHERE [Key]=@Key AND RowVersion = @RowVersion
END
COMMIT;
END
ELSE
BEGIN
BEGIN TRANSACTION;
IF EXISTS (SELECT * FROM [%s] WHERE [KEY]=@KEY)
BEGIN
THROW 2601, ''FIRST-WRITE: COMPETING RECORD ALREADY WRITTEN.'', 1
END
BEGIN
BEGIN TRY
INSERT INTO [%s] ([Key], [Data]) VALUES (@Key, @Data);
END TRY
BEGIN CATCH
IF ERROR_NUMBER() IN (2601, 2627)
UPDATE [%s]
SET [Data]=@Data, UpdateDate=GETDATE()
WHERE [Key]=@Key AND RowVersion = ISNULL(@RowVersion, RowVersion)
END CATCH
END
COMMIT;
END
END
ELSE
BEGIN
IF (@RowVersion IS NOT NULL)
BEGIN
UPDATE [%s]
SET [Data]=@Data, UpdateDate=GETDATE()
WHERE [Key]=@Key AND RowVersion = @RowVersion
RETURN
END
ELSE
BEGIN
BEGIN TRY
INSERT INTO [%s] ([Key], [Data]) VALUES (@Key, @Data);
END TRY
BEGIN CATCH
IF ERROR_NUMBER() IN (2601, 2627)
UPDATE [%s]
SET [Data]=@Data, UpdateDate=GETDATE()
WHERE [Key]=@Key AND RowVersion = ISNULL(@RowVersion, RowVersion)
END CATCH
END
END
`,
mr.upsertProcFullName,
mr.pkColumnType,
m.store.tableName,
m.store.tableName,
m.store.tableName,
m.store.tableName,
m.store.tableName,
m.store.tableName,
m.store.tableName,
m.store.tableName,
)
return m.createStoredProcedureIfNotExists(db, mr.upsertProcName, tsql)
}