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415 lines
14 KiB
415 lines
14 KiB
// Copyright (c) 2004, 2021, Oracle and/or its affiliates.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License, version 2.0, as
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// published by the Free Software Foundation.
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//
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// This program is also distributed with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an
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// additional permission to link the program and your derivative works
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// with the separately licensed software that they have included with
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// MySQL.
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//
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// Without limiting anything contained in the foregoing, this file,
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// which is part of MySQL Connector/NET, is also subject to the
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// Universal FOSS Exception, version 1.0, a copy of which can be found at
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// http://oss.oracle.com/licenses/universal-foss-exception.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License, version 2.0, for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Text.RegularExpressions;
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using MySql.Data.Common;
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using MySql.Data.Types;
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using System.Security;
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namespace MySql.Data.MySqlClient
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{
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[Flags]
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internal enum ColumnFlags : int
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{
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NOT_NULL = 1,
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PRIMARY_KEY = 2,
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UNIQUE_KEY = 4,
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MULTIPLE_KEY = 8,
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BLOB = 16,
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UNSIGNED = 32,
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ZERO_FILL = 64,
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BINARY = 128,
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ENUM = 256,
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AUTO_INCREMENT = 512,
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TIMESTAMP = 1024,
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SET = 2048,
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NUMBER = 32768
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}
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;
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/// <summary>
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/// Summary description for Field.
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/// </summary>
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internal class MySqlField
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{
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#region Fields
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// public fields
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public string CatalogName;
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public int ColumnLength;
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public string ColumnName;
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public string OriginalColumnName;
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public string TableName;
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public string RealTableName;
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public string DatabaseName;
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public Encoding Encoding;
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// protected fields
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protected int charSetIndex;
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protected DBVersion connVersion;
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protected bool binaryOk;
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// internal fields
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internal Driver driver;
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#endregion
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[SecuritySafeCritical]
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public MySqlField(Driver driver)
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{
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this.driver = driver;
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this.connVersion = driver.Version;
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this.MaxLength = 1;
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this.binaryOk = true;
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#if !NETFRAMEWORK
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Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
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#endif
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}
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#region Properties
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public int CharacterSetIndex
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{
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get { return this.charSetIndex; }
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set { this.charSetIndex = value; this.SetFieldEncoding(); }
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}
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public MySqlDbType Type { get; internal set; }
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public byte Precision { get; set; }
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public byte Scale { get; set; }
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public int MaxLength { get; set; }
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public ColumnFlags Flags { get; protected set; }
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public bool IsAutoIncrement => (this.Flags & ColumnFlags.AUTO_INCREMENT) > 0;
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public bool IsNumeric => (this.Flags & ColumnFlags.NUMBER) > 0;
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public bool AllowsNull => (this.Flags & ColumnFlags.NOT_NULL) == 0;
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public bool IsUnique => (this.Flags & ColumnFlags.UNIQUE_KEY) > 0;
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public bool IsPrimaryKey => (this.Flags & ColumnFlags.PRIMARY_KEY) > 0;
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public bool IsBlob => (this.Type >= MySqlDbType.TinyBlob &&
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this.Type <= MySqlDbType.Blob) ||
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(this.Type >= MySqlDbType.TinyText &&
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this.Type <= MySqlDbType.Text) ||
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(this.Flags & ColumnFlags.BLOB) > 0;
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public bool IsBinary => this.binaryOk && (this.CharacterSetIndex == 63);
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public bool IsUnsigned => (this.Flags & ColumnFlags.UNSIGNED) > 0;
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public bool IsTextField
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{
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get
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{
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return this.Type == MySqlDbType.VarString || this.Type == MySqlDbType.VarChar ||
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this.Type == MySqlDbType.String || (this.Type == MySqlDbType.Guid && !this.driver.Settings.OldGuids);
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}
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}
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private int CharacterLength => this.ColumnLength / this.MaxLength;
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public List<Type> TypeConversions { get; } = new List<Type>();
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#endregion
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public void SetTypeAndFlags(MySqlDbType type, ColumnFlags flags)
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{
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this.Flags = flags;
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this.Type = type;
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if (String.IsNullOrEmpty(this.TableName) && String.IsNullOrEmpty(this.RealTableName) &&
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this.IsBinary && this.driver.Settings.FunctionsReturnString)
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{
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this.CharacterSetIndex = this.driver.ConnectionCharSetIndex;
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}
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// if our type is an unsigned number, then we need
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// to bump it up into our unsigned types
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// we're trusting that the server is not going to set the UNSIGNED
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// flag unless we are a number
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if (this.IsUnsigned)
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{
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switch (type)
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{
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case MySqlDbType.Byte:
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this.Type = MySqlDbType.UByte;
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return;
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case MySqlDbType.Int16:
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this.Type = MySqlDbType.UInt16;
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return;
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case MySqlDbType.Int24:
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this.Type = MySqlDbType.UInt24;
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return;
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case MySqlDbType.Int32:
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this.Type = MySqlDbType.UInt32;
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return;
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case MySqlDbType.Int64:
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this.Flags = this.Flags & ColumnFlags.UNSIGNED;
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this.Type = MySqlDbType.UInt64;
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return;
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}
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}
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if (this.IsBlob)
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{
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// handle blob to UTF8 conversion if requested. This is only activated
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// on binary blobs
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if (this.IsBinary && this.driver.Settings.TreatBlobsAsUTF8)
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{
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bool convertBlob = false;
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Regex includeRegex = this.driver.Settings.GetBlobAsUTF8IncludeRegex();
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Regex excludeRegex = this.driver.Settings.GetBlobAsUTF8ExcludeRegex();
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if (includeRegex != null && includeRegex.IsMatch(this.ColumnName))
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{
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convertBlob = true;
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}
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else if (includeRegex == null && excludeRegex != null &&
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!excludeRegex.IsMatch(this.ColumnName))
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{
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convertBlob = true;
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}
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if (convertBlob)
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{
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this.binaryOk = false;
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this.Encoding = Encoding.GetEncoding("UTF-8");
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this.charSetIndex = -1; // lets driver know we are in charge of encoding
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this.MaxLength = 4;
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}
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}
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if (!this.IsBinary)
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{
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if (type == MySqlDbType.TinyBlob)
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{
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this.Type = MySqlDbType.TinyText;
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}
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else if (type == MySqlDbType.MediumBlob)
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{
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this.Type = MySqlDbType.MediumText;
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}
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else if (type == MySqlDbType.Blob)
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{
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this.Type = MySqlDbType.Text;
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}
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else if (type == MySqlDbType.LongBlob)
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{
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this.Type = MySqlDbType.LongText;
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}
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}
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if (type == MySqlDbType.JSON)
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{
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this.binaryOk = false;
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this.Encoding = Encoding.GetEncoding("UTF-8");
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this.charSetIndex = -1; // lets driver know we are in charge of encoding
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this.MaxLength = 4;
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}
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}
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// now determine if we really should be binary
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if (this.driver.Settings.RespectBinaryFlags)
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{
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this.CheckForExceptions();
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}
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if (this.Type == MySqlDbType.String && this.CharacterLength == 36 && !this.driver.Settings.OldGuids)
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{
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this.Type = MySqlDbType.Guid;
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}
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if (!this.IsBinary)
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{
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return;
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}
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if (this.driver.Settings.RespectBinaryFlags)
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{
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if (type == MySqlDbType.String)
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{
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this.Type = MySqlDbType.Binary;
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}
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else if (type == MySqlDbType.VarChar ||
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type == MySqlDbType.VarString)
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{
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this.Type = MySqlDbType.VarBinary;
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}
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}
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if (this.CharacterSetIndex == 63)
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{
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this.CharacterSetIndex = this.driver.ConnectionCharSetIndex;
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}
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if (this.Type == MySqlDbType.Binary && this.ColumnLength == 16 && this.driver.Settings.OldGuids)
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{
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this.Type = MySqlDbType.Guid;
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}
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}
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public void AddTypeConversion(Type t)
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{
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if (this.TypeConversions.Contains(t))
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{
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return;
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}
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this.TypeConversions.Add(t);
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}
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private void CheckForExceptions()
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{
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string colName = String.Empty;
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if (this.OriginalColumnName != null)
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{
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colName = StringUtility.ToUpperInvariant(this.OriginalColumnName);
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}
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if (colName.StartsWith("CHAR(", StringComparison.Ordinal))
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{
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this.binaryOk = false;
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}
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}
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public IMySqlValue GetValueObject()
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{
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IMySqlValue v = GetIMySqlValue(this.Type);
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if (v is MySqlByte && this.ColumnLength == 1 && this.driver.Settings.TreatTinyAsBoolean)
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{
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MySqlByte b = (MySqlByte)v;
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b.TreatAsBoolean = true;
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v = b;
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}
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else if (v is MySqlGuid)
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{
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MySqlGuid g = (MySqlGuid)v;
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g.OldGuids = this.driver.Settings.OldGuids;
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v = g;
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}
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return v;
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}
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public static IMySqlValue GetIMySqlValue(MySqlDbType type)
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{
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switch (type)
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{
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case MySqlDbType.Byte:
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return new MySqlByte();
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case MySqlDbType.UByte:
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return new MySqlUByte();
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case MySqlDbType.Year:
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case MySqlDbType.Int16:
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return new MySqlInt16();
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case MySqlDbType.UInt16:
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return new MySqlUInt16();
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case MySqlDbType.Int24:
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case MySqlDbType.Int32:
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return new MySqlInt32(type, true);
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case MySqlDbType.UInt24:
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case MySqlDbType.UInt32:
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return new MySqlUInt32(type, true);
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case MySqlDbType.Bit:
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return new MySqlBit();
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case MySqlDbType.Int64:
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return new MySqlInt64();
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case MySqlDbType.UInt64:
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return new MySqlUInt64();
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case MySqlDbType.Time:
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return new MySqlTimeSpan();
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case MySqlDbType.Date:
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case MySqlDbType.DateTime:
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case MySqlDbType.Newdate:
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case MySqlDbType.Timestamp:
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return new MySqlDateTime(type, true);
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case MySqlDbType.Decimal:
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case MySqlDbType.NewDecimal:
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return new MySqlDecimal();
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case MySqlDbType.Float:
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return new MySqlSingle();
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case MySqlDbType.Double:
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return new MySqlDouble();
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case MySqlDbType.Set:
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case MySqlDbType.Enum:
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case MySqlDbType.String:
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case MySqlDbType.VarString:
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case MySqlDbType.VarChar:
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case MySqlDbType.Text:
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case MySqlDbType.TinyText:
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case MySqlDbType.MediumText:
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case MySqlDbType.LongText:
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case MySqlDbType.JSON:
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case (MySqlDbType)Field_Type.NULL:
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return new MySqlString(type, true);
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case MySqlDbType.Geometry:
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return new MySqlGeometry(type, true);
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case MySqlDbType.Blob:
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case MySqlDbType.MediumBlob:
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case MySqlDbType.LongBlob:
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case MySqlDbType.TinyBlob:
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case MySqlDbType.Binary:
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case MySqlDbType.VarBinary:
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return new MySqlBinary(type, true);
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case MySqlDbType.Guid:
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return new MySqlGuid();
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default:
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throw new MySqlException("Unknown data type");
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}
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}
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private void SetFieldEncoding()
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{
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Dictionary<int, string> charSets = this.driver.CharacterSets;
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DBVersion version = this.driver.Version;
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if (charSets == null || charSets.Count == 0 || this.CharacterSetIndex == -1)
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{
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return;
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}
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if (charSets[this.CharacterSetIndex] == null)
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{
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return;
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}
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CharacterSet cs = CharSetMap.GetCharacterSet(version, (string)charSets[this.CharacterSetIndex]);
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this.MaxLength = cs.byteCount;
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this.Encoding = CharSetMap.GetEncoding(version, (string)charSets[this.CharacterSetIndex]);
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}
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}
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}
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