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SqlServerProcessor.cs
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SqlServerProcessor.cs
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#region License
// Copyright (c) 2018, Fluent Migrator Project
//
// 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.
#endregion
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.IO;
using System.Linq;
using FluentMigrator.Expressions;
using FluentMigrator.Runner.BatchParser;
using FluentMigrator.Runner.BatchParser.Sources;
using FluentMigrator.Runner.BatchParser.SpecialTokenSearchers;
using FluentMigrator.Runner.Generators;
using FluentMigrator.Runner.Generators.Generic;
using FluentMigrator.Runner.Helpers;
using FluentMigrator.Runner.Initialization;
using JetBrains.Annotations;
using Microsoft.Data.SqlClient;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
namespace FluentMigrator.Runner.Processors.SqlServer
{
public class SqlServerProcessor : GenericProcessorBase
{
[CanBeNull]
private readonly IServiceProvider _serviceProvider;
private const string SqlSchemaExists = "SELECT 1 WHERE EXISTS (SELECT * FROM sys.schemas WHERE NAME = '{0}') ";
private const string TABLE_EXISTS = "SELECT 1 WHERE EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}')";
private const string COLUMN_EXISTS = "SELECT 1 WHERE EXISTS (SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}' AND COLUMN_NAME = '{2}')";
private const string CONSTRAINT_EXISTS = "SELECT 1 WHERE EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE CONSTRAINT_CATALOG = DB_NAME() AND TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}' AND CONSTRAINT_NAME = '{2}')";
private const string INDEX_EXISTS = "SELECT 1 WHERE EXISTS (SELECT * FROM sys.indexes WHERE name = '{0}' and object_id=OBJECT_ID('{1}.{2}'))";
private const string SEQUENCES_EXISTS = "SELECT 1 WHERE EXISTS (SELECT * FROM INFORMATION_SCHEMA.SEQUENCES WHERE SEQUENCE_SCHEMA = '{0}' AND SEQUENCE_NAME = '{1}' )";
private const string DEFAULTVALUE_EXISTS = "SELECT 1 WHERE EXISTS (SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}' AND COLUMN_NAME = '{2}' AND COLUMN_DEFAULT LIKE '{3}')";
public override string DatabaseType { get;}
public override IList<string> DatabaseTypeAliases { get; }
public IQuoter Quoter { get; }
[Obsolete]
public SqlServerProcessor(
IEnumerable<string> databaseTypes,
IDbConnection connection,
GenericGenerator generator,
IAnnouncer announcer,
[NotNull] IMigrationProcessorOptions options,
IDbFactory factory)
: base(connection, factory, generator, announcer, options)
{
var dbTypes = databaseTypes.ToList();
DatabaseType = dbTypes.First();
DatabaseTypeAliases = dbTypes.Skip(1).ToList();
Quoter = generator?.Quoter;
}
protected SqlServerProcessor(
[NotNull, ItemNotNull] IEnumerable<string> databaseTypes,
[NotNull] IMigrationGenerator generator,
[NotNull] IQuoter quoter,
[NotNull] ILogger logger,
[NotNull] IOptionsSnapshot<ProcessorOptions> options,
[NotNull] IConnectionStringAccessor connectionStringAccessor,
[NotNull] IServiceProvider serviceProvider)
: this(databaseTypes, SqlClientFactory.Instance, generator, quoter, logger, options, connectionStringAccessor, serviceProvider)
{
}
protected SqlServerProcessor(
[NotNull, ItemNotNull] IEnumerable<string> databaseTypes,
[NotNull] DbProviderFactory factory,
[NotNull] IMigrationGenerator generator,
[NotNull] IQuoter quoter,
[NotNull] ILogger logger,
[NotNull] IOptionsSnapshot<ProcessorOptions> options,
[NotNull] IConnectionStringAccessor connectionStringAccessor,
[NotNull] IServiceProvider serviceProvider)
: base(() => factory, generator, logger, options.Value, connectionStringAccessor)
{
_serviceProvider = serviceProvider;
var dbTypes = databaseTypes.ToList();
DatabaseType = dbTypes.First();
DatabaseTypeAliases = dbTypes.Skip(1).ToList();
Quoter = quoter;
}
private static string SafeSchemaName(string schemaName)
{
return string.IsNullOrEmpty(schemaName) ? "dbo" : FormatHelper.FormatSqlEscape(schemaName);
}
public override void BeginTransaction()
{
base.BeginTransaction();
Logger.LogSql("BEGIN TRANSACTION");
}
public override void CommitTransaction()
{
base.CommitTransaction();
Logger.LogSql("COMMIT TRANSACTION");
}
public override void RollbackTransaction()
{
if (Transaction == null)
{
return;
}
base.RollbackTransaction();
Logger.LogSql("ROLLBACK TRANSACTION");
}
public override bool SchemaExists(string schemaName)
{
return Exists(SqlSchemaExists, SafeSchemaName(schemaName));
}
public override bool TableExists(string schemaName, string tableName)
{
try
{
return Exists(TABLE_EXISTS, SafeSchemaName(schemaName),
FormatHelper.FormatSqlEscape(tableName));
}
catch (Exception e)
{
Logger.LogError(e, "There was an exception checking if table {Table} in {Schema} exists", tableName, schemaName);
}
return false;
}
public override bool ColumnExists(string schemaName, string tableName, string columnName)
{
return Exists(COLUMN_EXISTS, SafeSchemaName(schemaName),
FormatHelper.FormatSqlEscape(tableName), FormatHelper.FormatSqlEscape(columnName));
}
public override bool ConstraintExists(string schemaName, string tableName, string constraintName)
{
return Exists(CONSTRAINT_EXISTS, SafeSchemaName(schemaName),
FormatHelper.FormatSqlEscape(tableName), FormatHelper.FormatSqlEscape(constraintName));
}
public override bool IndexExists(string schemaName, string tableName, string indexName)
{
return Exists(INDEX_EXISTS,
FormatHelper.FormatSqlEscape(indexName), SafeSchemaName(schemaName), FormatHelper.FormatSqlEscape(tableName));
}
public override bool SequenceExists(string schemaName, string sequenceName)
{
return Exists(SEQUENCES_EXISTS, SafeSchemaName(schemaName),
FormatHelper.FormatSqlEscape(sequenceName));
}
public override bool DefaultValueExists(string schemaName, string tableName, string columnName, object defaultValue)
{
var defaultValueAsString = string.Format("%{0}%", FormatHelper.FormatSqlEscape(defaultValue.ToString()));
return Exists(DEFAULTVALUE_EXISTS, SafeSchemaName(schemaName),
FormatHelper.FormatSqlEscape(tableName),
FormatHelper.FormatSqlEscape(columnName), defaultValueAsString);
}
public override void Execute(string template, params object[] args)
{
Process(string.Format(template, args));
}
public override bool Exists(string template, params object[] args)
{
EnsureConnectionIsOpen();
using (var command = CreateCommand(string.Format(template, args)))
{
var result = command.ExecuteScalar();
return DBNull.Value != result && Convert.ToInt32(result) == 1;
}
}
public override DataSet ReadTableData(string schemaName, string tableName)
{
return Read("SELECT * FROM [{0}].[{1}]", SafeSchemaName(schemaName), tableName);
}
public override DataSet Read(string template, params object[] args)
{
EnsureConnectionIsOpen();
using (var command = CreateCommand(string.Format(template, args)))
using (var reader = command.ExecuteReader())
{
return reader.ReadDataSet();
}
}
protected override void Process(string sql)
{
Logger.LogSql(sql);
if (Options.PreviewOnly || string.IsNullOrEmpty(sql))
{
return;
}
EnsureConnectionIsOpen();
if (ContainsGo(sql))
{
ExecuteBatchNonQuery(sql);
}
else
{
ExecuteNonQuery(sql);
}
}
private bool ContainsGo(string sql)
{
var containsGo = false;
var parser = _serviceProvider?.GetService<SqlServerBatchParser>() ?? new SqlServerBatchParser();
parser.SpecialToken += (sender, args) => containsGo = true;
using (var source = new TextReaderSource(new StringReader(sql), true))
{
parser.Process(source);
}
return containsGo;
}
private void ExecuteNonQuery(string sql)
{
using (var command = CreateCommand(sql))
{
try
{
command.ExecuteNonQuery();
}
catch (Exception ex)
{
using (var message = new StringWriter())
{
ReThrowWithSql(ex, sql);
}
}
}
}
private void ExecuteBatchNonQuery(string sql)
{
var sqlBatch = string.Empty;
try
{
var parser = _serviceProvider?.GetService<SqlServerBatchParser>() ?? new SqlServerBatchParser();
parser.SqlText += (sender, args) => sqlBatch = args.SqlText.Trim();
parser.SpecialToken += (sender, args) =>
{
if (string.IsNullOrEmpty(sqlBatch))
{
return;
}
if (args.Opaque is GoSearcher.GoSearcherParameters goParams)
{
using (var command = CreateCommand(sqlBatch))
{
for (var i = 0; i != goParams.Count; ++i)
{
command.ExecuteNonQuery();
}
}
}
sqlBatch = null;
};
using (var source = new TextReaderSource(new StringReader(sql), true))
{
parser.Process(source, stripComments: Options.StripComments);
}
if (!string.IsNullOrEmpty(sqlBatch))
{
using (var command = CreateCommand(sqlBatch))
{
command.ExecuteNonQuery();
}
}
}
catch (Exception ex)
{
ReThrowWithSql(ex, string.IsNullOrEmpty(sqlBatch) ? sql : sqlBatch);
}
}
public override void Process(PerformDBOperationExpression expression)
{
Logger.LogSay("Performing DB Operation");
if (Options.PreviewOnly)
{
return;
}
EnsureConnectionIsOpen();
expression.Operation?.Invoke(Connection, Transaction);
}
}
}