public override DbParameter CreateParameter(string parameterName, AbstractDbType dbType, string?udtTypeName, bool nullable, object?value)
{
if (dbType.IsDate())
{
if (value is DateTime dt)
{
AssertDateTime(dt);
}
else if (value is Date d)
{
value = new NpgsqlDate((DateTime)d);
}
}
var result = new Npgsql.NpgsqlParameter(parameterName, value ?? DBNull.Value)
{
IsNullable = nullable
};
result.NpgsqlDbType = dbType.PostgreSql;
if (udtTypeName != null)
{
result.DataTypeName = udtTypeName;
}
return(result);
}
public override MemberInitExpression ParameterFactory(Expression parameterName, AbstractDbType dbType, string?udtTypeName, bool nullable, Expression value)
{
Expression valueExpr = Expression.Convert(
!dbType.IsDate() ? value :
value.Type.UnNullify() == typeof(DateTime) ? Expression.Call(miAsserDateTime, Expression.Convert(value, typeof(DateTime?))) :
value.Type.UnNullify() == typeof(Date) ? Expression.Convert(Expression.Convert(value, typeof(Date?)), typeof(DateTime?)) : //Converting from Date -> DateTime? directly produces null always
value,
typeof(object));
if (nullable)
{
valueExpr = Expression.Condition(Expression.Equal(value, Expression.Constant(null, value.Type)),
Expression.Constant(DBNull.Value, typeof(object)),
valueExpr);
}
NewExpression newExpr = Expression.New(typeof(NpgsqlParameter).GetConstructor(new[] { typeof(string), typeof(object) }), parameterName, valueExpr);
List <MemberBinding> mb = new List <MemberBinding>()
{
Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.IsNullable)), Expression.Constant(nullable)),
Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.NpgsqlDbType)), Expression.Constant(dbType.PostgreSql)),
};
if (udtTypeName != null)
{
mb.Add(Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.DataTypeName)), Expression.Constant(udtTypeName)));
}
return(Expression.MemberInit(newExpr, mb));
}
public override DbParameter CreateParameter(string parameterName, AbstractDbType dbType, string?udtTypeName, bool nullable, object?value)
{
if (dbType.IsDate())
{
if (value is DateTime dt)
{
AssertDateTime(dt);
}
else if (value is DateOnly d)
{
value = d.ToDateTime();
}
}
else if (dbType.IsTime())
{
if (value is TimeOnly to)
{
value = to.ToTimeSpan();
}
}
var result = new SqlParameter(parameterName, value ?? DBNull.Value)
{
IsNullable = nullable
};
result.SqlDbType = dbType.SqlServer;
if (udtTypeName != null)
{
result.UdtTypeName = udtTypeName;
}
return(result);
}
public override MemberInitExpression ParameterFactory(Expression parameterName, AbstractDbType dbType, int?size, byte?precision, byte?scale, string?udtTypeName, bool nullable, Expression value)
{
Expression valueExpr = Expression.Convert(
!dbType.IsDate() ? value :
value.Type.UnNullify() == typeof(DateTime) ? Expression.Call(miAsserDateTime, Expression.Convert(value, typeof(DateTime?))) :
value.Type.UnNullify() == typeof(DateOnly) ? Expression.Call(miToDateTimeKind, Expression.Convert(value, typeof(DateOnly?)), Expression.Constant(Schema.Current.DateTimeKind)) :
value,
typeof(object));
if (nullable)
{
valueExpr = Expression.Condition(Expression.Equal(value, Expression.Constant(null, value.Type)),
Expression.Constant(DBNull.Value, typeof(object)),
valueExpr);
}
NewExpression newExpr = Expression.New(typeof(NpgsqlParameter).GetConstructor(new[] { typeof(string), typeof(object) }) !, parameterName, valueExpr);
List <MemberBinding> mb = new List <MemberBinding>()
{
Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.IsNullable)) !, Expression.Constant(nullable)),
Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.NpgsqlDbType)) !, Expression.Constant(dbType.PostgreSql)),
};
if (size != null)
{
mb.Add(Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.Size)) !, Expression.Constant(size)));
}
if (precision != null)
{
mb.Add(Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.Precision)) !, Expression.Constant(precision)));
}
if (scale != null)
{
mb.Add(Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.Scale)) !, Expression.Constant(scale)));
}
if (udtTypeName != null)
{
mb.Add(Expression.Bind(typeof(NpgsqlParameter).GetProperty(nameof(NpgsqlParameter.DataTypeName)) !, Expression.Constant(udtTypeName)));
}
return(Expression.MemberInit(newExpr, mb));
}