Mono.Data.Sqlite.SqliteConnection.Schema_Columns C# (CSharp) Method

    private DataTable Schema_Columns(string strCatalog, string strTable, string strColumn)
    {
      DataTable tbl = new DataTable("Columns");
      DataRow row;

      tbl.Locale = CultureInfo.InvariantCulture;
      tbl.Columns.Add("TABLE_CATALOG", typeof(string));
      tbl.Columns.Add("TABLE_SCHEMA", typeof(string));
      tbl.Columns.Add("TABLE_NAME", typeof(string));
      tbl.Columns.Add("COLUMN_NAME", typeof(string));
      tbl.Columns.Add("COLUMN_GUID", typeof(Guid));
      tbl.Columns.Add("COLUMN_PROPID", typeof(long));
      tbl.Columns.Add("ORDINAL_POSITION", typeof(int));
      tbl.Columns.Add("COLUMN_HASDEFAULT", typeof(bool));
      tbl.Columns.Add("COLUMN_DEFAULT", typeof(string));
      tbl.Columns.Add("COLUMN_FLAGS", typeof(long));
      tbl.Columns.Add("IS_NULLABLE", typeof(bool));
      tbl.Columns.Add("DATA_TYPE", typeof(string));
      tbl.Columns.Add("TYPE_GUID", typeof(Guid));
      tbl.Columns.Add("CHARACTER_MAXIMUM_LENGTH", typeof(int));
      tbl.Columns.Add("CHARACTER_OCTET_LENGTH", typeof(int));
      tbl.Columns.Add("NUMERIC_PRECISION", typeof(int));
      tbl.Columns.Add("NUMERIC_SCALE", typeof(int));
      tbl.Columns.Add("DATETIME_PRECISION", typeof(long));
      tbl.Columns.Add("CHARACTER_SET_CATALOG", typeof(string));
      tbl.Columns.Add("CHARACTER_SET_SCHEMA", typeof(string));
      tbl.Columns.Add("CHARACTER_SET_NAME", typeof(string));
      tbl.Columns.Add("COLLATION_CATALOG", typeof(string));
      tbl.Columns.Add("COLLATION_SCHEMA", typeof(string));
      tbl.Columns.Add("COLLATION_NAME", typeof(string));
      tbl.Columns.Add("DOMAIN_CATALOG", typeof(string));
      tbl.Columns.Add("DOMAIN_NAME", typeof(string));
      tbl.Columns.Add("DESCRIPTION", typeof(string));
      tbl.Columns.Add("PRIMARY_KEY", typeof(bool));
      tbl.Columns.Add("EDM_TYPE", typeof(string));
      tbl.Columns.Add("AUTOINCREMENT", typeof(bool));
      tbl.Columns.Add("UNIQUE", typeof(bool));

      tbl.BeginLoadData();

      if (String.IsNullOrEmpty(strCatalog)) strCatalog = "main";

      string master = (String.Compare(strCatalog, "temp", true, CultureInfo.InvariantCulture) == 0) ? _tempmasterdb : _masterdb;

      using (SqliteCommand cmdTables = new SqliteCommand(String.Format(CultureInfo.InvariantCulture, "SELECT * FROM [{0}].[{1}] WHERE [type] LIKE 'table' OR [type] LIKE 'view'", strCatalog, master), this))
      using (SqliteDataReader rdTables = cmdTables.ExecuteReader())
      {
        while (rdTables.Read())
        {
          if (String.IsNullOrEmpty(strTable) || String.Compare(strTable, rdTables.GetString(2), true, CultureInfo.InvariantCulture) == 0)
          {
            try
            {
              using (SqliteCommand cmd = new SqliteCommand(String.Format(CultureInfo.InvariantCulture, "SELECT * FROM [{0}].[{1}]", strCatalog, rdTables.GetString(2)), this))
              using (SqliteDataReader rd = (SqliteDataReader)cmd.ExecuteReader(CommandBehavior.SchemaOnly))
              using (DataTable tblSchema = rd.GetSchemaTable(true, true))
              {
                foreach (DataRow schemaRow in tblSchema.Rows)
                {
                  if (String.Compare(schemaRow[SchemaTableColumn.ColumnName].ToString(), strColumn, true, CultureInfo.InvariantCulture) == 0
                    || strColumn == null)
                  {
                    row = tbl.NewRow();

                    row["NUMERIC_PRECISION"] = schemaRow[SchemaTableColumn.NumericPrecision];
                    row["NUMERIC_SCALE"] = schemaRow[SchemaTableColumn.NumericScale];
                    row["TABLE_NAME"] = rdTables.GetString(2);
                    row["COLUMN_NAME"] = schemaRow[SchemaTableColumn.ColumnName];
                    row["TABLE_CATALOG"] = strCatalog;
                    row["ORDINAL_POSITION"] = schemaRow[SchemaTableColumn.ColumnOrdinal];
                    row["COLUMN_HASDEFAULT"] = (schemaRow[SchemaTableOptionalColumn.DefaultValue] != DBNull.Value);
                    row["COLUMN_DEFAULT"] = schemaRow[SchemaTableOptionalColumn.DefaultValue];
                    row["IS_NULLABLE"] = schemaRow[SchemaTableColumn.AllowDBNull];
                    row["DATA_TYPE"] = schemaRow["DataTypeName"].ToString().ToLower(CultureInfo.InvariantCulture);
                    row["EDM_TYPE"] = SqliteConvert.DbTypeToTypeName((DbType)schemaRow[SchemaTableColumn.ProviderType]).ToString().ToLower(CultureInfo.InvariantCulture);
                    row["CHARACTER_MAXIMUM_LENGTH"] = schemaRow[SchemaTableColumn.ColumnSize];
                    row["TABLE_SCHEMA"] = schemaRow[SchemaTableColumn.BaseSchemaName];
                    row["PRIMARY_KEY"] = schemaRow[SchemaTableColumn.IsKey];
                    row["AUTOINCREMENT"] = schemaRow[SchemaTableOptionalColumn.IsAutoIncrement];
                    row["COLLATION_NAME"] = schemaRow["CollationType"];
                    row["UNIQUE"] = schemaRow[SchemaTableColumn.IsUnique];
                    tbl.Rows.Add(row);
                  }
                }
              }
            }
            catch(SqliteException)
            {
            }
          }
        }
      }

      tbl.AcceptChanges();
      tbl.EndLoadData();

      return tbl;
    }