dev-npgsql/npgsql: Npgsql is the .NET data provider for PostgreSQL.

src/Npgsql/Schema/NpgsqlDbColumn.cs
184 строки5 KB
Shay Rojansky
Last nullability work for 4.1
22 сен 2019, 16:32
22 сен 2019, 16:329bd3fff
using System;
using JetBrains.Annotations;
using Npgsql.PostgresTypes;
using NpgsqlTypes;

#if !NET461
using System.Data.Common;
#endif

#pragma warning disable 1591

namespace Npgsql.Schema
{
    /// <summary>
    /// Provides schema information about a column.
    /// </summary>
    /// <remarks>
    /// Note that this can correspond to a field returned in a query which isn't an actual table column
    ///
    /// See https://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.getschematable(v=vs.110).aspx
    /// for information on the meaning of the different fields.
    /// </remarks>
    public class NpgsqlDbColumn : DbColumn
    {
        public NpgsqlDbColumn()
        {
            PostgresType = UnknownBackendType.Instance;

            // Not supported in PostgreSQL
            IsExpression = false;
            IsAliased = false;
            IsHidden = false;
            IsIdentity = false;
        }

        #region Standard fields
#nullable disable
        // ReSharper disable once InconsistentNaming
        public new bool? AllowDBNull
        {
            get => base.AllowDBNull;
            protected internal set => base.AllowDBNull = value;
        }

        public new string BaseCatalogName
        {
            get => base.BaseCatalogName;
            protected internal set => base.BaseCatalogName = value;
        }

        public new string BaseColumnName
        {
            get => base.BaseColumnName;
            protected internal set => base.BaseColumnName = value;
        }

        public new string BaseSchemaName
        {
            get => base.BaseSchemaName;
            protected internal set => base.BaseSchemaName = value;
        }

        public new string BaseServerName
        {
            get => base.BaseServerName;
            protected internal set => base.BaseServerName = value;
        }

        public new string BaseTableName
        {
            get => base.BaseTableName;
            protected internal set => base.BaseTableName = value;
        }

        public new string ColumnName
        {
            get => base.ColumnName;
            protected internal set => base.ColumnName = value;
        }

        public new int? ColumnOrdinal
        {
            get => base.ColumnOrdinal;
            protected internal set => base.ColumnOrdinal = value;
        }

        public new int? ColumnSize
        {
            get => base.ColumnSize;
            protected internal set => base.ColumnSize = value;
        }

        public new bool? IsAutoIncrement
        {
            get => base.IsAutoIncrement;
            protected internal set => base.IsAutoIncrement = value;
        }

        public new bool? IsKey
        {
            get => base.IsKey;
            protected internal set => base.IsKey = value;
        }

        public new bool? IsLong
        {
            get => base.IsLong;
            protected internal set => base.IsLong = value;
        }

        public new bool? IsReadOnly
        {
            get => base.IsReadOnly;
            protected internal set => base.IsReadOnly = value;
        }

        public new bool? IsUnique
        {
            get => base.IsUnique;
            protected internal set => base.IsUnique = value;
        }

        public new int? NumericPrecision
        {
            get => base.NumericPrecision;
            protected internal set => base.NumericPrecision = value;
        }

        public new int? NumericScale
        {
            get => base.NumericScale;
            protected internal set => base.NumericScale = value;
        }

        public new string UdtAssemblyQualifiedName
        {
            get => base.UdtAssemblyQualifiedName;
            protected internal set => base.UdtAssemblyQualifiedName = value;
        }

        public new Type DataType
        {
            get => base.DataType;
            protected internal set => base.DataType = value;
        }

        public new string DataTypeName
        {
            get => base.DataTypeName;
            protected internal set => base.DataTypeName = value;
        }
#nullable restore
        #endregion Standard fields

        #region Npgsql-specific fields

        [PublicAPI]
        public PostgresType PostgresType { get; internal set; }
        [PublicAPI]
        public uint TypeOID { get; internal set; }
        [PublicAPI]
        public uint TableOID { get; internal set; }
        [PublicAPI]
        public short? ColumnAttributeNumber { get; internal set; }
        [PublicAPI]
        public string? DefaultValue { get; internal set; }
        [PublicAPI]
        public NpgsqlDbType? NpgsqlDbType { get; internal set; }

        public override object? this[string propertyName]
            => propertyName switch
            {
                nameof(PostgresType)          => PostgresType,
                nameof(TypeOID)               => TypeOID,
                nameof(TableOID)              => TableOID,
                nameof(ColumnAttributeNumber) => ColumnAttributeNumber,
                nameof(DefaultValue)          => DefaultValue,
                nameof(NpgsqlDbType)          => NpgsqlDbType,
                _                             => base[propertyName]
            };

        #endregion Npgsql-specific fields
    }
}