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684 lines
26 KiB
684 lines
26 KiB
// Copyright (c) 2004, 2020, 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 MySql.Data.Types;
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using System;
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using System.Collections;
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using System.ComponentModel;
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using System.Data;
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using System.Data.Common;
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using System.Globalization;
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using System.Reflection;
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using System.Text;
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namespace MySql.Data.MySqlClient
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{
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/// <summary>
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/// Represents a parameter to a <see cref="MySqlCommand"/>, This class cannot be inherited.
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/// </summary>
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[TypeConverter(typeof(MySqlParameterConverter))]
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public sealed partial class MySqlParameter : DbParameter, IDbDataParameter
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{
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private const int UNSIGNED_MASK = 0x8000;
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private object _paramValue;
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private string _paramName;
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private MySqlDbType _mySqlDbType;
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private bool _inferType = true;
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private const int GEOMETRY_LENGTH = 25;
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private DbType _dbType;
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#region Constructors
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name, the <see cref="MySqlParameter.MySqlDbType"/>, the size, and the source column name.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="dbType">One of the <see cref="MySqlParameter.MySqlDbType"/> values. </param>
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/// <param name="size">The length of the parameter. </param>
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/// <param name="sourceColumn">The name of the source column. </param>
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public MySqlParameter(string parameterName, MySqlDbType dbType, int size, string sourceColumn) : this(parameterName, dbType)
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{
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this.Size = size;
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this.Direction = ParameterDirection.Input;
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this.SourceColumn = sourceColumn;
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this.SourceVersion = DataRowVersion.Default;
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}
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public MySqlParameter()
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{
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this.SourceVersion = DataRowVersion.Default;
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this.Direction = ParameterDirection.Input;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name and a value of the new MySqlParameter.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="value">An <see cref="Object"/> that is the value of the <see cref="MySqlParameter"/>. </param>
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public MySqlParameter(string parameterName, object value) : this()
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{
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this.ParameterName = parameterName;
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this.Value = value;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name and the data type.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="dbType">One of the <see cref="MySqlDbType"/> values. </param>
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public MySqlParameter(string parameterName, MySqlDbType dbType) : this(parameterName, null)
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{
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this.MySqlDbType = dbType;
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this.SetNumericDefaultValueByType(this.MySqlDbType);
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}
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private void SetNumericDefaultValueByType(MySqlDbType mySqlDbType)
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{
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switch (mySqlDbType)
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{
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case MySqlDbType.Decimal:
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case MySqlDbType.Byte:
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case MySqlDbType.Int16:
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case MySqlDbType.Int24:
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case MySqlDbType.Int32:
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case MySqlDbType.Int64:
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case MySqlDbType.Float:
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case MySqlDbType.Double:
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if (this.Value is null)
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{
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this.Value = 0;
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}
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break;
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}
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name, the <see cref="MySqlDbType"/>, and the size.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="dbType">One of the <see cref="MySqlDbType"/> values. </param>
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/// <param name="size">The length of the parameter. </param>
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public MySqlParameter(string parameterName, MySqlDbType dbType, int size) : this(parameterName, dbType)
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{
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this.Size = size;
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="MySqlParameter"/> class with the parameter name, the type of the parameter, the size of the parameter, a <see cref="ParameterDirection"/>, the precision of the parameter, the scale of the parameter, the source column, a <see cref="DataRowVersion"/> to use, and the value of the parameter.
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/// </summary>
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/// <param name="parameterName">The name of the parameter to map. </param>
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/// <param name="dbType">One of the <see cref="MySqlParameter.MySqlDbType"/> values. </param>
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/// <param name="size">The length of the parameter. </param>
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/// <param name="direction">One of the <see cref="ParameterDirection"/> values. </param>
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/// <param name="isNullable">true if the value of the field can be null, otherwise false. </param>
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/// <param name="precision">The total number of digits to the left and right of the decimal point to which <see cref="MySqlParameter.Value"/> is resolved.</param>
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/// <param name="scale">The total number of decimal places to which <see cref="MySqlParameter.Value"/> is resolved. </param>
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/// <param name="sourceColumn">The name of the source column. </param>
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/// <param name="sourceVersion">One of the <see cref="DataRowVersion"/> values. </param>
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/// <param name="value">An <see cref="Object"/> that is the value of the <see cref="MySqlParameter"/>. </param>
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/// <exception cref="ArgumentException"/>
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public MySqlParameter(string parameterName, MySqlDbType dbType, int size, ParameterDirection direction,
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bool isNullable, byte precision, byte scale, string sourceColumn,
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DataRowVersion sourceVersion, object value)
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: this(parameterName, dbType, size, sourceColumn)
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{
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this.Direction = direction;
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this.IsNullable = isNullable;
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this.Precision = precision;
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this.Scale = scale;
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this.Value = value;
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this.SourceVersion = sourceVersion;
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}
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internal MySqlParameter(string name, MySqlDbType type, ParameterDirection dir, string col, DataRowVersion sourceVersion, object val)
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: this(name, type)
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{
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this.Direction = dir;
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this.SourceColumn = col;
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this.Value = val;
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this.SourceVersion = sourceVersion;
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}
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#endregion
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#region Properties
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[Category("Misc")]
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public override String ParameterName
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{
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get { return this._paramName; }
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set { this.SetParameterName(value); }
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}
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internal MySqlParameterCollection Collection { get; set; }
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internal Encoding Encoding { get; set; }
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internal bool TypeHasBeenSet => this._inferType == false;
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internal string BaseName
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{
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get
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{
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if (this.ParameterName.StartsWith("@", StringComparison.Ordinal) || this.ParameterName.StartsWith("?", StringComparison.Ordinal))
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{
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return this.ParameterName.Substring(1);
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}
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return this.ParameterName;
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}
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}
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/// <summary>
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/// Gets or sets a value indicating whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value parameter.
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/// As of MySql version 4.1 and earlier, input-only is the only valid choice.
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/// </summary>
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[Category("Data")]
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public override ParameterDirection Direction { get; set; }
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/// <summary>
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/// Gets or sets a value indicating whether the parameter accepts null values.
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/// </summary>
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[Browsable(false)]
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public override Boolean IsNullable { get; set; }
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/// <summary>
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/// Gets or sets the <see cref="MySqlParameter.MySqlDbType"/> of the parameter.
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/// </summary>
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[Category("Data")]
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[DbProviderSpecificTypeProperty(true)]
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public MySqlDbType MySqlDbType
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{
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get { return this._mySqlDbType; }
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set
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{
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this.SetMySqlDbType(value);
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this._inferType = false;
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}
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}
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/// <summary>
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/// Gets or sets the maximum number of digits used to represent the <see cref="Value"/> property.
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/// </summary>
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[Category("Data")]
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public override byte Precision { get; set; }
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/// <summary>
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/// Gets or sets the number of decimal places to which <see cref="Value"/> is resolved.
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/// </summary>
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[Category("Data")]
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public override byte Scale { get; set; }
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/// <summary>
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/// Gets or sets the maximum size, in bytes, of the data within the column.
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/// </summary>
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[Category("Data")]
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public override int Size { get; set; }
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/// <summary>
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/// Gets or sets the value of the parameter.
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/// </summary>
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[TypeConverter(typeof(StringConverter))]
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[Category("Data")]
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public override object Value
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{
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get { return this._paramValue; }
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set
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{
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this._paramValue = value;
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byte[] valueAsByte = value as byte[];
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string valueAsString = value as string;
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if (valueAsByte != null)
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{
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this.Size = valueAsByte.Length;
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}
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else if (valueAsString != null)
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{
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this.Size = valueAsString.Length;
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}
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if (this._inferType)
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{
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this.SetTypeFromValue();
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}
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}
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}
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internal IMySqlValue ValueObject { get; private set; }
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/// <summary>
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/// Returns the possible values for this parameter if this parameter is of type
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/// SET or ENUM. Returns null otherwise.
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/// </summary>
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public IList PossibleValues { get; internal set; }
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/// <summary>
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/// Gets or sets the name of the source column that is mapped to the <see cref="System.Data.DataSet"/> and used for loading or returning the <see cref="MySqlParameter.Value"/>.
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/// </summary>
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[Category("Data")]
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public override String SourceColumn { get; set; }
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/// <summary>
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/// Sets or gets a value which indicates whether the source column is nullable.
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/// This allows <see cref="DbCommandBuilder"/> to correctly generate Update statements
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/// for nullable columns.
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/// </summary>
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public override bool SourceColumnNullMapping { get; set; }
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/// <summary>
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/// Gets or sets the <see cref="DbType"/> of the parameter.
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/// </summary>
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public override DbType DbType
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{
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get { return this._dbType; }
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set
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{
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this.SetDbType(value);
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this._inferType = false;
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}
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}
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#endregion
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private void SetParameterName(string name)
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{
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this.Collection?.ParameterNameChanged(this, this._paramName, name);
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this._paramName = name;
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}
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/// <summary>
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/// Overridden. Gets a string containing the <see cref="ParameterName"/>.
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/// </summary>
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/// <returns></returns>
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public override string ToString() => this._paramName;
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internal int GetPSType()
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{
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switch (this._mySqlDbType)
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{
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case MySqlDbType.Bit:
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return (int)MySqlDbType.Int64 | UNSIGNED_MASK;
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case MySqlDbType.UByte:
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return (int)MySqlDbType.Byte | UNSIGNED_MASK;
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case MySqlDbType.UInt64:
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return (int)MySqlDbType.Int64 | UNSIGNED_MASK;
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case MySqlDbType.UInt32:
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return (int)MySqlDbType.Int32 | UNSIGNED_MASK;
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case MySqlDbType.UInt24:
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return (int)MySqlDbType.Int32 | UNSIGNED_MASK;
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case MySqlDbType.UInt16:
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return (int)MySqlDbType.Int16 | UNSIGNED_MASK;
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case MySqlDbType.Guid:
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return (int)MySqlDbType.Guid - 600;
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default:
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int value = (int)this._mySqlDbType;
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value = value > 255 ? value - 500 : value;
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return value;
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}
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}
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internal void Serialize(MySqlPacket packet, bool binary, MySqlConnectionStringBuilder settings)
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{
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if (!binary && (this._paramValue == null || this._paramValue == DBNull.Value))
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{
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packet.WriteStringNoNull("NULL");
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}
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else
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{
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if (this.ValueObject.MySqlDbType == MySqlDbType.Guid)
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{
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MySqlGuid g = (MySqlGuid)this.ValueObject;
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g.OldGuids = settings.OldGuids;
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this.ValueObject = g;
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}
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if (this.ValueObject.MySqlDbType == MySqlDbType.Geometry)
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{
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MySqlGeometry v = (MySqlGeometry)this.ValueObject;
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if (v.IsNull && this.Value != null)
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{
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MySqlGeometry.TryParse(this.Value.ToString(), out v);
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}
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this.ValueObject = v;
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}
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this.ValueObject.WriteValue(packet, binary, this._paramValue, this.Size);
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}
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}
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private void SetMySqlDbType(MySqlDbType mysqlDbtype)
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{
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// JSON type is treated as VarChar because in MySQL Server since 8.0.13
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/// MYSQL_TYPE_JSON is not allowed as Item_param lacks a proper
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/// implementation for val_json.
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this._mySqlDbType = mysqlDbtype == MySqlDbType.JSON ? MySqlDbType.VarChar : mysqlDbtype;
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this.ValueObject = MySqlField.GetIMySqlValue(this._mySqlDbType);
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this.SetDbTypeFromMySqlDbType();
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}
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private void SetTypeFromValue()
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{
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if (this._paramValue == null || this._paramValue == DBNull.Value)
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{
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return;
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}
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if (this._paramValue is Guid)
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{
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this.MySqlDbType = MySqlDbType.Guid;
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}
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else if (this._paramValue is TimeSpan)
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{
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this.MySqlDbType = MySqlDbType.Time;
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}
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else if (this._paramValue is bool)
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{
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this.MySqlDbType = MySqlDbType.Byte;
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}
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else
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{
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Type t = this._paramValue.GetType();
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if (t.GetTypeInfo().BaseType == typeof(Enum))
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{
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t = t.GetTypeInfo().GetEnumUnderlyingType();
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}
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switch (t.Name)
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{
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case "SByte": this.MySqlDbType = MySqlDbType.Byte; break;
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case "Byte": this.MySqlDbType = MySqlDbType.UByte; break;
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case "Int16": this.MySqlDbType = MySqlDbType.Int16; break;
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case "UInt16": this.MySqlDbType = MySqlDbType.UInt16; break;
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case "Int32": this.MySqlDbType = MySqlDbType.Int32; break;
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case "UInt32": this.MySqlDbType = MySqlDbType.UInt32; break;
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case "Int64": this.MySqlDbType = MySqlDbType.Int64; break;
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case "UInt64": this.MySqlDbType = MySqlDbType.UInt64; break;
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case "DateTime": this.MySqlDbType = MySqlDbType.DateTime; break;
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case "String": this.MySqlDbType = MySqlDbType.VarChar; break;
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case "Single": this.MySqlDbType = MySqlDbType.Float; break;
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case "Double": this.MySqlDbType = MySqlDbType.Double; break;
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case "MySqlGeometry": this.MySqlDbType = MySqlDbType.Geometry; break;
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case "Decimal": this.MySqlDbType = MySqlDbType.Decimal; break;
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case "Object":
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default:
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this.MySqlDbType = MySqlDbType.Blob;
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break;
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}
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}
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}
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// this method is pretty dumb but we want it to be fast. it doesn't return size based
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// on value and type but just on the value.
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internal long EstimatedSize()
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{
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if (this.Value == null || this.Value == DBNull.Value)
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{
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return 4; // size of NULL
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}
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if (this.Value is byte[])
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{
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return ((byte[])this.Value).Length;
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}
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if (this.Value is string)
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{
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return ((string)this.Value).Length * 4; // account for UTF-8 (yeah I know)
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}
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if (this.Value is decimal || this.Value is float)
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{
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return 64;
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}
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return 32;
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}
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/// <summary>
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/// Resets the <b>DbType</b> property to its original settings.
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/// </summary>
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public override void ResetDbType()
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{
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this._inferType = true;
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}
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void SetDbTypeFromMySqlDbType()
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{
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switch (this._mySqlDbType)
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{
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case MySqlDbType.NewDecimal:
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case MySqlDbType.Decimal:
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this._dbType = DbType.Decimal;
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break;
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case MySqlDbType.Byte:
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this._dbType = DbType.SByte;
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break;
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case MySqlDbType.UByte:
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this._dbType = DbType.Byte;
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break;
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case MySqlDbType.Int16:
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this._dbType = DbType.Int16;
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break;
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case MySqlDbType.UInt16:
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this._dbType = DbType.UInt16;
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break;
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case MySqlDbType.Int24:
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case MySqlDbType.Int32:
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this._dbType = DbType.Int32;
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break;
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case MySqlDbType.UInt24:
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case MySqlDbType.UInt32:
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this._dbType = DbType.UInt32;
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break;
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case MySqlDbType.Int64:
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this._dbType = DbType.Int64;
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break;
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case MySqlDbType.UInt64:
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this._dbType = DbType.UInt64;
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break;
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case MySqlDbType.Bit:
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this._dbType = DbType.UInt64;
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break;
|
|
case MySqlDbType.Float:
|
|
this._dbType = DbType.Single;
|
|
break;
|
|
case MySqlDbType.Double:
|
|
this._dbType = DbType.Double;
|
|
break;
|
|
case MySqlDbType.Timestamp:
|
|
case MySqlDbType.DateTime:
|
|
this._dbType = DbType.DateTime;
|
|
break;
|
|
case MySqlDbType.Date:
|
|
case MySqlDbType.Newdate:
|
|
case MySqlDbType.Year:
|
|
this._dbType = DbType.Date;
|
|
break;
|
|
case MySqlDbType.Time:
|
|
this._dbType = DbType.Time;
|
|
break;
|
|
case MySqlDbType.Enum:
|
|
case MySqlDbType.Set:
|
|
case MySqlDbType.VarChar:
|
|
this._dbType = DbType.String;
|
|
break;
|
|
case MySqlDbType.TinyBlob:
|
|
case MySqlDbType.MediumBlob:
|
|
case MySqlDbType.LongBlob:
|
|
case MySqlDbType.Blob:
|
|
this._dbType = DbType.Object;
|
|
break;
|
|
case MySqlDbType.String:
|
|
this._dbType = DbType.StringFixedLength;
|
|
break;
|
|
case MySqlDbType.Guid:
|
|
this._dbType = DbType.Guid;
|
|
break;
|
|
}
|
|
}
|
|
|
|
private void SetDbType(DbType dbType)
|
|
{
|
|
this._dbType = dbType;
|
|
switch (this._dbType)
|
|
{
|
|
case DbType.Guid:
|
|
this._mySqlDbType = MySqlDbType.Guid;
|
|
break;
|
|
|
|
case DbType.AnsiString:
|
|
case DbType.String:
|
|
this._mySqlDbType = MySqlDbType.VarChar;
|
|
break;
|
|
|
|
case DbType.AnsiStringFixedLength:
|
|
case DbType.StringFixedLength:
|
|
this._mySqlDbType = MySqlDbType.String;
|
|
break;
|
|
|
|
case DbType.Boolean:
|
|
case DbType.Byte:
|
|
this._mySqlDbType = MySqlDbType.UByte;
|
|
break;
|
|
|
|
case DbType.SByte:
|
|
this._mySqlDbType = MySqlDbType.Byte;
|
|
break;
|
|
|
|
case DbType.Date:
|
|
this._mySqlDbType = MySqlDbType.Date;
|
|
break;
|
|
case DbType.DateTime:
|
|
this._mySqlDbType = MySqlDbType.DateTime;
|
|
break;
|
|
|
|
case DbType.Time:
|
|
this._mySqlDbType = MySqlDbType.Time;
|
|
break;
|
|
case DbType.Single:
|
|
this._mySqlDbType = MySqlDbType.Float;
|
|
break;
|
|
case DbType.Double:
|
|
this._mySqlDbType = MySqlDbType.Double;
|
|
break;
|
|
|
|
case DbType.Int16:
|
|
this._mySqlDbType = MySqlDbType.Int16;
|
|
break;
|
|
case DbType.UInt16:
|
|
this._mySqlDbType = MySqlDbType.UInt16;
|
|
break;
|
|
|
|
case DbType.Int32:
|
|
this._mySqlDbType = MySqlDbType.Int32;
|
|
break;
|
|
case DbType.UInt32:
|
|
this._mySqlDbType = MySqlDbType.UInt32;
|
|
break;
|
|
|
|
case DbType.Int64:
|
|
this._mySqlDbType = MySqlDbType.Int64;
|
|
break;
|
|
case DbType.UInt64:
|
|
this._mySqlDbType = MySqlDbType.UInt64;
|
|
break;
|
|
|
|
case DbType.Decimal:
|
|
case DbType.Currency:
|
|
this._mySqlDbType = MySqlDbType.Decimal;
|
|
break;
|
|
|
|
case DbType.Object:
|
|
case DbType.VarNumeric:
|
|
case DbType.Binary:
|
|
default:
|
|
this._mySqlDbType = MySqlDbType.Blob;
|
|
break;
|
|
}
|
|
|
|
if (this._dbType == DbType.Object)
|
|
{
|
|
var value = this._paramValue as byte[];
|
|
if (value != null && value.Length == GEOMETRY_LENGTH)
|
|
{
|
|
this._mySqlDbType = MySqlDbType.Geometry;
|
|
}
|
|
}
|
|
|
|
this.ValueObject = MySqlField.GetIMySqlValue(this._mySqlDbType);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
internal class MySqlParameterConverter : TypeConverter
|
|
{
|
|
|
|
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
|
|
{
|
|
if (destinationType == typeof(System.ComponentModel.Design.Serialization.InstanceDescriptor))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Always call the base to see if it can perform the conversion.
|
|
return base.CanConvertTo(context, destinationType);
|
|
}
|
|
|
|
public override object ConvertTo(
|
|
ITypeDescriptorContext context,
|
|
CultureInfo culture, object value, Type destinationType)
|
|
{
|
|
if (destinationType == typeof(System.ComponentModel.Design.Serialization.InstanceDescriptor))
|
|
{
|
|
ConstructorInfo ci = typeof(MySqlParameter).GetConstructor(
|
|
new[]
|
|
{
|
|
typeof (string), typeof (MySqlDbType), typeof (int), typeof (ParameterDirection),
|
|
typeof (bool), typeof (byte), typeof (byte), typeof (string),
|
|
typeof (object)
|
|
});
|
|
MySqlParameter p = (MySqlParameter)value;
|
|
return new System.ComponentModel.Design.Serialization.InstanceDescriptor(ci, new object[]
|
|
{
|
|
p.ParameterName, p.DbType, p.Size, p.Direction,
|
|
p.IsNullable, p.Precision,
|
|
p.Scale, p.SourceColumn, p.Value
|
|
});
|
|
}
|
|
|
|
// Always call base, even if you can't convert.
|
|
return base.ConvertTo(context, culture, value, destinationType);
|
|
}
|
|
|
|
}
|
|
}
|
|
|