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Db2ISeriesProcessor.cs
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Db2ISeriesProcessor.cs
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#region License
//
// Copyright (c) 2007-2024, 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.Linq;
using FluentMigrator.Expressions;
using FluentMigrator.Runner.Generators;
using FluentMigrator.Runner.Generators.DB2;
using FluentMigrator.Runner.Generators.DB2.iSeries;
using FluentMigrator.Runner.Helpers;
using FluentMigrator.Runner.Initialization;
using JetBrains.Annotations;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
namespace FluentMigrator.Runner.Processors.DB2.iSeries
{
public class Db2ISeriesProcessor : GenericProcessorBase
{
[Obsolete]
public Db2ISeriesProcessor(IDbConnection connection, IMigrationGenerator generator, IAnnouncer announcer, IMigrationProcessorOptions options, IDbFactory factory)
: base(connection, factory, generator, announcer, options)
{
Quoter = new Db2Quoter();
}
public Db2ISeriesProcessor(
[NotNull] Db2ISeriesDbFactory factory,
[NotNull] Db2ISeriesGenerator generator,
[NotNull] Db2ISeriesQuoter quoter,
[NotNull] ILogger<Db2ISeriesProcessor> logger,
[NotNull] IOptionsSnapshot<ProcessorOptions> options,
[NotNull] IConnectionStringAccessor connectionStringAccessor)
: base(() => factory.Factory, generator, logger, options.Value, connectionStringAccessor)
{
Quoter = quoter;
}
public override string DatabaseType => "DB2 iSeries";
public override IList<string> DatabaseTypeAliases { get; } = new List<string> { "IBM DB2 iSeries", "DB2" };
public IQuoter Quoter
{
get;
set;
}
public override bool ColumnExists(string schemaName, string tableName, string columnName)
{
var schema = string.IsNullOrEmpty(schemaName) ? string.Empty : "TABLE_SCHEMA = '" + FormatToSafeName(schemaName) + "' AND ";
var doesExist = Exists("SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE {0} TABLE_NAME = '{1}' AND COLUMN_NAME='{2}'", schema, FormatToSafeName(tableName), FormatToSafeName(columnName));
return doesExist;
}
public override bool ConstraintExists(string schemaName, string tableName, string constraintName)
{
var schema = string.IsNullOrEmpty(schemaName) ? string.Empty : "TABLE_SCHEMA = '" + FormatToSafeName(schemaName) + "' AND ";
return Exists("SELECT CONSTRAINT_NAME FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE {0} TABLE_NAME = '{1}' AND CONSTRAINT_NAME='{2}'", schema, FormatToSafeName(tableName), FormatToSafeName(constraintName));
}
public override bool DefaultValueExists(string schemaName, string tableName, string columnName, object defaultValue)
{
var schema = string.IsNullOrEmpty(schemaName) ? string.Empty : "TABLE_SCHEMA = '" + FormatToSafeName(schemaName) + "' AND ";
var defaultValueAsString = string.Format("%{0}%", FormatHelper.FormatSqlEscape(defaultValue.ToString()));
return Exists("SELECT COLUMN_DEFAULT FROM INFORMATION_SCHEMA.COLUMNS WHERE {0} TABLE_NAME = '{1}' AND COLUMN_NAME = '{2}' AND COLUMN_DEFAULT LIKE '{3}'", schema, FormatToSafeName(tableName), columnName.ToUpper(), 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)))
using (var reader = command.ExecuteReader())
{
return reader.Read();
}
}
public override bool IndexExists(string schemaName, string tableName, string indexName)
{
var schema = string.IsNullOrEmpty(schemaName) ? string.Empty : "INDEX_SCHEMA = '" + FormatToSafeName(schemaName) + "' AND ";
var doesExist = Exists(
"SELECT NAME FROM INFORMATION_SCHEMA.SYSINDEXES WHERE {0}TABLE_NAME = '{1}' AND NAME = '{2}'",
schema,
FormatToSafeName(tableName),
FormatToSafeName(indexName));
return doesExist;
}
public override void Process(PerformDBOperationExpression expression)
{
Logger.LogSay("Performing DB Operation");
if (Options.PreviewOnly)
{
return;
}
EnsureConnectionIsOpen();
expression.Operation?.Invoke(Connection, Transaction);
}
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();
}
}
public override DataSet ReadTableData(string schemaName, string tableName)
{
return Read("SELECT * FROM {0}", Quoter.QuoteTableName(tableName, schemaName));
}
public override bool SchemaExists(string schemaName)
{
return Exists("SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = '{0}'", FormatToSafeName(schemaName));
}
public override bool SequenceExists(string schemaName, string sequenceName)
{
return false;
}
public override bool TableExists(string schemaName, string tableName)
{
var schema = string.IsNullOrEmpty(schemaName) ? string.Empty : "TABLE_SCHEMA = '" + FormatToSafeName(schemaName) + "' AND ";
return Exists("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE {0}TABLE_NAME = '{1}'", schema, FormatToSafeName(tableName));
}
protected override void Process(string sql)
{
Logger.LogSql(sql);
if (Options.PreviewOnly || string.IsNullOrEmpty(sql))
{
return;
}
EnsureConnectionIsOpen();
using (var command = CreateCommand(sql))
{
command.ExecuteNonQuery();
}
}
private string FormatToSafeName(string sqlName)
{
var rawName = Quoter.UnQuote(sqlName);
return rawName.Contains('\'') ? FormatHelper.FormatSqlEscape(rawName) : rawName.ToUpper();
}
}
}