private TableMetadata ReadTableMetadata(ref SequenceReader <byte> reader)
{
var numericColumnCount = ColumnTypes.Count(c => IsNumberColumn((ColumnType)c));
var metadata = new TableMetadata();
while (reader.Remaining > 0)
{
reader.TryRead(out byte filedTypeCode);
var fieldType = (MetadataFieldType)filedTypeCode;
var length = reader.ReadLengthEncodedInteger();
var subReader = new SequenceReader <byte>(reader.Sequence.Slice(reader.Consumed, length));
try
{
ReadMetadataField(ref subReader, fieldType, metadata, numericColumnCount);
}
finally
{
reader.Advance(length);
}
}
return(metadata);
}
private TableMetadata ReadTableMetadata(ref SequenceReader <byte> reader)
{
var numericColumnCount = ColumnTypes.Count(c => IsNumberColumn((ColumnType)c));
var metadata = new TableMetadata();
while (reader.Remaining > 0)
{
reader.TryRead(out byte filedTypeCode);
var fieldType = (MetadataFieldType)filedTypeCode;
switch (fieldType)
{
case MetadataFieldType.SIGNEDNESS:
metadata.Signedness = reader.ReadBitArray(numericColumnCount);
break;
case MetadataFieldType.DEFAULT_CHARSET:
metadata.DefaultCharset = ReadDefaultCharset(ref reader);
break;
case MetadataFieldType.COLUMN_CHARSET:
metadata.ColumnCharsets = ReadIntegers(ref reader);
break;
case MetadataFieldType.COLUMN_NAME:
metadata.ColumnNames = ReadStringList(ref reader);
break;
case MetadataFieldType.SET_STR_VALUE:
metadata.SetStrValues = ReadTypeValues(ref reader);
break;
case MetadataFieldType.ENUM_STR_VALUE:
metadata.EnumStrValues = ReadTypeValues(ref reader);
break;
case MetadataFieldType.GEOMETRY_TYPE:
metadata.GeometryTypes = ReadIntegers(ref reader);
break;
case MetadataFieldType.SIMPLE_PRIMARY_KEY:
metadata.SimplePrimaryKeys = ReadIntegers(ref reader);
break;
case MetadataFieldType.PRIMARY_KEY_WITH_PREFIX:
metadata.PrimaryKeysWithPrefix = ReadIntegerDictionary(ref reader);
break;
case MetadataFieldType.ENUM_AND_SET_DEFAULT_CHARSET:
metadata.EnumAndSetDefaultCharset = ReadDefaultCharset(ref reader);
break;
case MetadataFieldType.ENUM_AND_SET_COLUMN_CHARSET:
metadata.EnumAndSetColumnCharsets = ReadIntegers(ref reader);
break;
default:
throw new Exception("Unsupported table metadata field type: " + fieldType);
}
}
return(metadata);
}