Implement MySqlParameter.Precision and Scale.

Author: bgrainger

src/MySqlConnector/MySql.Data.MySqlClient/MySqlParameter.cs

@@ -45,6 +45,26 @@ public MySqlParameter(string name, MySqlDbType mySqlDbType, int size, string sou
 #endif
 		}
 
+#if !NETSTANDARD1_3
+		public MySqlParameter(string name, MySqlDbType mySqlDbType, int size, ParameterDirection direction, bool isNullable, byte precision, byte scale, string sourceColumn, DataRowVersion sourceVersion, object value)
+			: this(name, mySqlDbType, size, sourceColumn)
+		{
+			Direction = direction;
+			IsNullable = isNullable;
+#if NET45
+			if (precision != 0)
+				throw new PlatformNotSupportedException("'precision' parameter is not supported on .NET 4.5.");
+			if (scale != 0)
+				throw new PlatformNotSupportedException("'scale' parameter is not supported on .NET 4.5.");
+#else
+			Precision = precision;
+			Scale = scale;
+#endif
+			SourceVersion = sourceVersion;
+			Value = value;
+		}
+#endif
+
 		public override DbType DbType
 		{
 			get => m_dbType;
@@ -83,6 +103,11 @@ public override ParameterDirection Direction
 
 		public override bool IsNullable { get; set; }
 
+#if !NET45
+		public override byte Precision { get; set; }
+		public override byte Scale { get; set; }
+#endif
+
 		public override string ParameterName
 		{
 			get => m_name;

tests/SideBySide/ParameterTests.cs

@@ -159,6 +159,30 @@ public void ConstructorNameTypeSizeSourceColumn()
 			Assert.Equal("source", parameter.SourceColumn);
 		}
 
+#if !NETCOREAPP1_1_2
+		[Fact]
+		public void ConstructorEverything()
+		{
+#if !NET452
+			var parameter = new MySqlParameter("@name", MySqlDbType.Float, 4, ParameterDirection.Output, true, 1, 2, "source", DataRowVersion.Original, 3.0);
+			Assert.Equal(1, parameter.Precision);
+			Assert.Equal(2, parameter.Scale);
+#else
+			// The .NET 4.5.2 tests use the .NET 4.5 library, which does not support Precision and Scale (they were added in .NET 4.5.1)
+			var parameter = new MySqlParameter("@name", MySqlDbType.Float, 4, ParameterDirection.Output, true, 0, 0, "source", DataRowVersion.Original, 3.0);
+#endif
+			Assert.Equal("@name", parameter.ParameterName);
+			Assert.Equal(MySqlDbType.Float, parameter.MySqlDbType);
+			Assert.Equal(DbType.Single, parameter.DbType);
+			Assert.Equal(3.0, parameter.Value);
+			Assert.True(parameter.IsNullable);
+			Assert.Equal(ParameterDirection.Output, parameter.Direction);
+			Assert.Equal(4, parameter.Size);
+			Assert.Equal(DataRowVersion.Original, parameter.SourceVersion);
+			Assert.Equal("source", parameter.SourceColumn);
+		}
+#endif
+
 		[Theory]
 		[InlineData(1, DbType.Int32, MySqlDbType.Int32)]
 		[InlineData(1.0, DbType.Double, MySqlDbType.Double)]