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migration.go
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migration.go
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// ------------------------------------------------------------
// Copyright (c) Microsoft Corporation and Dapr Contributors.
// Licensed under the MIT License.
// ------------------------------------------------------------
package sqlserver
import (
"database/sql"
"fmt"
)
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,
}
}
/* #nosec */
func (m *migration) executeMigrations() (migrationResult, error) {
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_%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"
}
db, err := sql.Open("sqlserver", m.store.connectionString)
if err != nil {
return r, err
}
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 {
_, err := db.Exec(tsql)
if 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) 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))
AS
IF (@RowVersion IS NOT NULL)
BEGIN
UPDATE [%s]
SET [Data]=@Data, UpdateDate=GETDATE()
WHERE [Key]=@Key AND RowVersion = @RowVersion
RETURN
END
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`,
mr.upsertProcFullName,
mr.pkColumnType,
m.store.tableName,
m.store.tableName,
m.store.tableName)
return m.createStoredProcedureIfNotExists(db, mr.upsertProcName, tsql)
}