public MetadataProperty CreateProperty(ApplicationObject owner, string name, SqlFieldInfo field)
{
MetadataProperty property = new MetadataProperty()
{
Name = name,
DbName = field.COLUMN_NAME,
FileName = Guid.Empty,
Purpose = PropertyPurpose.System
};
SetupPropertyType(owner, property, field);
return(property);
}
private List <SqlFieldInfo> GetSqlFields(string tableName)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine(@"SELECT");
sb.AppendLine(@" ORDINAL_POSITION, COLUMN_NAME, DATA_TYPE,");
sb.AppendLine(@" ISNULL(CHARACTER_MAXIMUM_LENGTH, 0) AS CHARACTER_MAXIMUM_LENGTH,");
sb.AppendLine(@" ISNULL(NUMERIC_PRECISION, 0) AS NUMERIC_PRECISION,");
sb.AppendLine(@" ISNULL(NUMERIC_SCALE, 0) AS NUMERIC_SCALE,");
sb.AppendLine(@" CASE WHEN IS_NULLABLE = 'NO' THEN CAST(0x00 AS bit) ELSE CAST(0x01 AS bit) END AS IS_NULLABLE");
sb.AppendLine(@"FROM");
sb.AppendLine(@" INFORMATION_SCHEMA.COLUMNS");
sb.AppendLine(@"WHERE");
sb.AppendLine(@" TABLE_NAME = N'{0}'");
sb.AppendLine(@"ORDER BY");
sb.AppendLine(@" ORDINAL_POSITION ASC;");
string sql = string.Format(sb.ToString(), tableName);
List <SqlFieldInfo> list = new List <SqlFieldInfo>();
using (SqlConnection connection = new SqlConnection(this.ConnectionString))
{
using (SqlCommand command = new SqlCommand(sql, connection))
{
connection.Open();
using (SqlDataReader reader = command.ExecuteReader())
{
while (reader.Read())
{
SqlFieldInfo item = new SqlFieldInfo()
{
ORDINAL_POSITION = reader.GetInt32(0),
COLUMN_NAME = reader.GetString(1),
DATA_TYPE = reader.GetString(2),
CHARACTER_MAXIMUM_LENGTH = reader.GetInt32(3),
NUMERIC_PRECISION = reader.GetByte(4),
NUMERIC_SCALE = reader.GetInt32(5),
IS_NULLABLE = reader.GetBoolean(6)
};
list.Add(item);
}
}
}
}
return(list);
}
public DatabaseField CreateField(SqlFieldInfo field)
{
return(new DatabaseField()
{
Name = field.COLUMN_NAME,
TypeName = field.DATA_TYPE,
Length = field.CHARACTER_MAXIMUM_LENGTH,
Scale = field.NUMERIC_SCALE,
Precision = field.NUMERIC_PRECISION,
IsNullable = field.IS_NULLABLE,
Purpose = (field.DATA_TYPE == "timestamp" ||
field.COLUMN_NAME == "_version" ||
field.COLUMN_NAME == "_Version")
? FieldPurpose.Version
: FieldPurpose.Value
});
}
private void SetupPropertyType(ApplicationObject owner, MetadataProperty property, SqlFieldInfo field)
{
// TODO: учесть именования типов PostgreSQL, например (mchar, mvarchar)
if (field.DATA_TYPE == "nvarchar")
{
property.PropertyType.CanBeString = true;
}
else if (field.DATA_TYPE == "numeric")
{
property.PropertyType.CanBeNumeric = true;
}
else if (field.DATA_TYPE == "timestamp")
{
property.PropertyType.IsBinary = true;
}
else if (field.DATA_TYPE == "binary")
{
if (field.CHARACTER_MAXIMUM_LENGTH == 1)
{
property.PropertyType.CanBeBoolean = true;
}
else if (field.CHARACTER_MAXIMUM_LENGTH == 16)
{
if (field.COLUMN_NAME.ToLowerInvariant().TrimStart('_') == "idrref")
{
property.PropertyType.IsUuid = true;
}
else
{
property.PropertyType.CanBeReference = true;
if (owner is TablePart)
{
property.PropertyType.ReferenceTypeCode = ((TablePart)owner).Owner.TypeCode;
}
else
{
property.PropertyType.ReferenceTypeCode = owner.TypeCode;
}
}
}
}
}
public string GetPropertyName(SqlFieldInfo field)
{
return(LookupPropertyName(field.COLUMN_NAME));
}
