/// <summary>
/// Gets the definition of a User defined type
/// </summary>
public UdtColumnInfo GetUdtDefinition(string keyspace, string typeName)
{
var rs = Query(String.Format(SelectUdts + " WHERE keyspace_name='{0}' AND type_name = '{1}';", keyspace, typeName));
var row = rs.FirstOrDefault();
if (row == null)
{
return(null);
}
var udt = new UdtColumnInfo(row.GetValue <string>("keyspace_name") + "." + row.GetValue <string>("type_name"));
var fieldNames = row.GetValue <List <string> >("field_names");
var fieldTypes = row.GetValue <List <string> >("field_types");
if (fieldNames.Count != fieldTypes.Count)
{
var ex = new DriverInternalError("Field names and types for UDT do not match");
_logger.Error(ex);
throw ex;
}
for (var i = 0; i < fieldNames.Count; i++)
{
var field = TypeCodec.ParseDataType(fieldTypes[i]);
field.Name = fieldNames[i];
udt.Fields.Add(field);
}
return(udt);
}
public void ParseDataTypeNameFrozenTest()
{
var dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.FrozenType(org.apache.cassandra.db.marshal.ListType(org.apache.cassandra.db.marshal.TimeUUIDType))");
Assert.AreEqual(ColumnTypeCode.List, dataType.TypeCode);
Assert.IsInstanceOf <ListColumnInfo>(dataType.TypeInfo);
Assert.AreEqual(ColumnTypeCode.Timeuuid, (dataType.TypeInfo as ListColumnInfo).ValueTypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.MapType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.FrozenType(org.apache.cassandra.db.marshal.ListType(org.apache.cassandra.db.marshal.Int32Type)))");
Assert.AreEqual(ColumnTypeCode.Map, dataType.TypeCode);
Assert.IsInstanceOf <MapColumnInfo>(dataType.TypeInfo);
Assert.AreEqual(ColumnTypeCode.Varchar, (dataType.TypeInfo as MapColumnInfo).KeyTypeCode);
Assert.AreEqual(ColumnTypeCode.List, (dataType.TypeInfo as MapColumnInfo).ValueTypeCode);
var subType = (ListColumnInfo)((dataType.TypeInfo as MapColumnInfo).ValueTypeInfo);
Assert.AreEqual(ColumnTypeCode.Int, subType.ValueTypeCode);
}
/// <summary>
/// Creates a new instance of function metadata based on a schema_function row.
/// </summary>
internal static FunctionMetadata Build(Row row)
{
var emptyArray = new string[0];
return(new FunctionMetadata
{
Name = row.GetValue <string>("function_name"),
KeyspaceName = row.GetValue <string>("keyspace_name"),
Signature = row.GetValue <string[]>("signature") ?? emptyArray,
ArgumentNames = row.GetValue <string[]>("argument_names") ?? emptyArray,
Body = row.GetValue <string>("body"),
CalledOnNullInput = row.GetValue <bool>("called_on_null_input"),
Language = row.GetValue <string>("language"),
ReturnType = TypeCodec.ParseDataType(row.GetValue <string>("return_type")),
ArgumentTypes = (row.GetValue <string[]>("argument_types") ?? emptyArray).Select(s => TypeCodec.ParseDataType(s)).ToArray()
});
}
/// <summary>
/// Creates a new instance of function metadata based on a schema_function row.
/// </summary>
internal static AggregateMetadata Build(int protocolVersion, Row row)
{
var emptyArray = new string[0];
var aggregate = new AggregateMetadata
{
Name = row.GetValue <string>("aggregate_name"),
KeyspaceName = row.GetValue <string>("keyspace_name"),
Signature = row.GetValue <string[]>("signature") ?? emptyArray,
StateFunction = row.GetValue <string>("state_func"),
StateType = TypeCodec.ParseDataType(row.GetValue <string>("state_type")),
FinalFunction = row.GetValue <string>("final_func"),
ReturnType = TypeCodec.ParseDataType(row.GetValue <string>("return_type")),
ArgumentTypes = (row.GetValue <string[]>("argument_types") ?? emptyArray).Select(s => TypeCodec.ParseDataType(s)).ToArray(),
};
aggregate.InitialCondition = TypeCodec.Decode(protocolVersion, row.GetValue <byte[]>("initcond"), aggregate.StateType.TypeCode, aggregate.StateType.TypeInfo);
return(aggregate);
}
public void ParseDataTypeNameSingleTest()
{
var dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.Int32Type");
Assert.AreEqual(ColumnTypeCode.Int, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.UUIDType");
Assert.AreEqual(ColumnTypeCode.Uuid, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.UTF8Type");
Assert.AreEqual(ColumnTypeCode.Varchar, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.BytesType");
Assert.AreEqual(ColumnTypeCode.Blob, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.FloatType");
Assert.AreEqual(ColumnTypeCode.Float, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.DoubleType");
Assert.AreEqual(ColumnTypeCode.Double, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.BooleanType");
Assert.AreEqual(ColumnTypeCode.Boolean, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.InetAddressType");
Assert.AreEqual(ColumnTypeCode.Inet, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.DateType");
Assert.AreEqual(ColumnTypeCode.Timestamp, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.TimestampType");
Assert.AreEqual(ColumnTypeCode.Timestamp, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.LongType");
Assert.AreEqual(ColumnTypeCode.Bigint, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.DecimalType");
Assert.AreEqual(ColumnTypeCode.Decimal, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.IntegerType");
Assert.AreEqual(ColumnTypeCode.Varint, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.CounterColumnType");
Assert.AreEqual(ColumnTypeCode.Counter, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.TimeUUIDType");
Assert.AreEqual(ColumnTypeCode.Timeuuid, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.AsciiType");
Assert.AreEqual(ColumnTypeCode.Ascii, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.SimpleDateType");
Assert.AreEqual(ColumnTypeCode.Date, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.TimeType");
Assert.AreEqual(ColumnTypeCode.Time, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.ShortType");
Assert.AreEqual(ColumnTypeCode.SmallInt, dataType.TypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.ByteType");
Assert.AreEqual(ColumnTypeCode.TinyInt, dataType.TypeCode);
}
public void ParseDataTypeNameMultipleTest()
{
var dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.ListType(org.apache.cassandra.db.marshal.Int32Type)");
Assert.AreEqual(ColumnTypeCode.List, dataType.TypeCode);
Assert.IsInstanceOf <ListColumnInfo>(dataType.TypeInfo);
Assert.AreEqual(ColumnTypeCode.Int, (dataType.TypeInfo as ListColumnInfo).ValueTypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UUIDType)");
Assert.AreEqual(ColumnTypeCode.Set, dataType.TypeCode);
Assert.IsInstanceOf <SetColumnInfo>(dataType.TypeInfo);
Assert.AreEqual(ColumnTypeCode.Uuid, (dataType.TypeInfo as SetColumnInfo).KeyTypeCode);
dataType = TypeCodec.ParseDataType("org.apache.cassandra.db.marshal.MapType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.LongType)");
Assert.AreEqual(ColumnTypeCode.Map, dataType.TypeCode);
Assert.IsInstanceOf <MapColumnInfo>(dataType.TypeInfo);
Assert.AreEqual(ColumnTypeCode.Varchar, (dataType.TypeInfo as MapColumnInfo).KeyTypeCode);
Assert.AreEqual(ColumnTypeCode.Bigint, (dataType.TypeInfo as MapColumnInfo).ValueTypeCode);
}
public void ParseDataTypeNameUdtTest()
{
var typeText =
"org.apache.cassandra.db.marshal.UserType(" +
"tester,70686f6e65,616c696173:org.apache.cassandra.db.marshal.UTF8Type,6e756d626572:org.apache.cassandra.db.marshal.UTF8Type" +
")";
var dataType = TypeCodec.ParseDataType(typeText);
Assert.AreEqual(ColumnTypeCode.Udt, dataType.TypeCode);
//Udt name
Assert.AreEqual("phone", dataType.Name);
Assert.IsInstanceOf <UdtColumnInfo>(dataType.TypeInfo);
var subTypes = (dataType.TypeInfo as UdtColumnInfo).Fields;
Assert.AreEqual(2, subTypes.Count);
Assert.AreEqual("alias", subTypes[0].Name);
Assert.AreEqual(ColumnTypeCode.Varchar, subTypes[0].TypeCode);
Assert.AreEqual("number", subTypes[1].Name);
Assert.AreEqual(ColumnTypeCode.Varchar, subTypes[1].TypeCode);
}
/// <summary>
/// Gets the definition of a User defined type
/// </summary>
internal UdtColumnInfo GetUdtDefinition(string typeName)
{
var keyspaceName = Name;
var rs = _cc.Query(String.Format(SelectUdts, keyspaceName, typeName), true);
var row = rs.FirstOrDefault();
if (row == null)
{
return(null);
}
var udt = new UdtColumnInfo(row.GetValue <string>("keyspace_name") + "." + row.GetValue <string>("type_name"));
var fieldNames = row.GetValue <List <string> >("field_names");
var fieldTypes = row.GetValue <List <string> >("field_types");
for (var i = 0; i < fieldNames.Count && i < fieldTypes.Count; i++)
{
var field = TypeCodec.ParseDataType(fieldTypes[i]);
field.Name = fieldNames[i];
udt.Fields.Add(field);
}
return(udt);
}
public void ParseDataTypeNameUdtNestedTest()
{
var typeText =
"org.apache.cassandra.db.marshal.UserType(" +
"tester," +
"61646472657373," +
"737472656574:org.apache.cassandra.db.marshal.UTF8Type," +
"5a4950:org.apache.cassandra.db.marshal.Int32Type," +
"70686f6e6573:org.apache.cassandra.db.marshal.SetType(" +
"org.apache.cassandra.db.marshal.UserType(" +
"tester," +
"70686f6e65," +
"616c696173:org.apache.cassandra.db.marshal.UTF8Type," +
"6e756d626572:org.apache.cassandra.db.marshal.UTF8Type))" +
")";
var dataType = TypeCodec.ParseDataType(typeText);
Assert.AreEqual(ColumnTypeCode.Udt, dataType.TypeCode);
Assert.IsInstanceOf <UdtColumnInfo>(dataType.TypeInfo);
Assert.AreEqual("address", dataType.Name);
Assert.AreEqual("tester.address", (dataType.TypeInfo as UdtColumnInfo).Name);
var subTypes = (dataType.TypeInfo as UdtColumnInfo).Fields;
Assert.AreEqual(3, subTypes.Count);
Assert.AreEqual("street,ZIP,phones", String.Join(",", subTypes.Select(s => s.Name)));
Assert.AreEqual(ColumnTypeCode.Varchar, subTypes[0].TypeCode);
Assert.AreEqual(ColumnTypeCode.Set, subTypes[2].TypeCode);
//field name
Assert.AreEqual("phones", subTypes[2].Name);
var phonesSubType = (UdtColumnInfo)((SetColumnInfo)subTypes[2].TypeInfo).KeyTypeInfo;
Assert.AreEqual("tester.phone", phonesSubType.Name);
Assert.AreEqual(2, phonesSubType.Fields.Count);
Assert.AreEqual("alias", phonesSubType.Fields[0].Name);
Assert.AreEqual("number", phonesSubType.Fields[1].Name);
}
/// <summary>
/// Returns metadata of specified table in this keyspace.
/// </summary>
/// <param name="tableName"> the name of table to retrieve </param>
/// <returns>the metadata for table <c>tableName</c> in this keyspace if it
/// exists, <c>null</c> otherwise.</returns>
public TableMetadata GetTableMetadata(string tableName)
{
TableMetadata table;
if (_tables.TryGetValue(tableName, out table))
{
//The table metadata is available in local cache
return(table);
}
var keyspaceName = Name;
var columns = new Dictionary <string, TableColumn>();
var partitionKeys = new List <Tuple <int, TableColumn> >();
var tableMetadataRow = _cc.Query(String.Format(SelectSingleTable, tableName, keyspaceName), true).FirstOrDefault();
if (tableMetadataRow == null)
{
return(null);
}
//Read table options
var options = new TableOptions
{
isCompactStorage = false,
bfFpChance = tableMetadataRow.GetValue <double>("bloom_filter_fp_chance"),
caching = tableMetadataRow.GetValue <string>("caching"),
comment = tableMetadataRow.GetValue <string>("comment"),
gcGrace = tableMetadataRow.GetValue <int>("gc_grace_seconds"),
localReadRepair = tableMetadataRow.GetValue <double>("local_read_repair_chance"),
readRepair = tableMetadataRow.GetValue <double>("read_repair_chance"),
compactionOptions = GetCompactionStrategyOptions(tableMetadataRow),
compressionParams =
(SortedDictionary <string, string>)Utils.ConvertStringToMap(tableMetadataRow.GetValue <string>("compression_parameters"))
};
//replicate_on_write column not present in C* >= 2.1
if (tableMetadataRow.GetColumn("replicate_on_write") != null)
{
options.replicateOnWrite = tableMetadataRow.GetValue <bool>("replicate_on_write");
}
var columnsMetadata = _cc.Query(String.Format(SelectColumns, tableName, keyspaceName), true);
foreach (var row in columnsMetadata)
{
var dataType = TypeCodec.ParseDataType(row.GetValue <string>("validator"));
var col = new TableColumn
{
Name = row.GetValue <string>("column_name"),
Keyspace = row.GetValue <string>("keyspace_name"),
Table = row.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
SecondaryIndexName = row.GetValue <string>("index_name"),
SecondaryIndexType = row.GetValue <string>("index_type"),
KeyType =
row.GetValue <string>("index_name") != null
? KeyType.SecondaryIndex
: KeyType.None,
};
if (row.GetColumn("type") != null && row.GetValue <string>("type") == "partition_key")
{
partitionKeys.Add(Tuple.Create(row.GetValue <int?>("component_index") ?? 0, col));
}
columns.Add(col.Name, col);
}
var comparator = tableMetadataRow.GetValue <string>("comparator");
var comparatorComposite = false;
if (comparator.StartsWith(TypeCodec.CompositeTypeName))
{
comparator = comparator.Replace(TypeCodec.CompositeTypeName, "");
comparatorComposite = true;
}
//Remove reversed type
comparator = comparator.Replace(TypeCodec.ReversedTypeName, "");
if (partitionKeys.Count == 0 && tableMetadataRow.GetColumn("key_aliases") != null)
{
//In C* 1.2, keys are not stored on the schema_columns table
var colNames = tableMetadataRow.GetValue <string>("column_aliases");
var rowKeys = colNames.Substring(1, colNames.Length - 2).Split(',');
for (var i = 0; i < rowKeys.Length; i++)
{
if (rowKeys[i].StartsWith("\""))
{
rowKeys[i] = rowKeys[i].Substring(1, rowKeys[i].Length - 2).Replace("\"\"", "\"");
}
}
if (rowKeys.Length > 0 && rowKeys[0] != string.Empty)
{
var rg = new Regex(@"org\.apache\.cassandra\.db\.marshal\.\w+");
var rowKeysTypes = rg.Matches(comparator);
for (var i = 0; i < rowKeys.Length; i++)
{
var keyName = rowKeys[i];
var dataType = TypeCodec.ParseDataType(rowKeysTypes[i].ToString());
var dsc = new TableColumn
{
Name = keyName,
Keyspace = tableMetadataRow.GetValue <string>("keyspace_name"),
Table = tableMetadataRow.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
KeyType = KeyType.Clustering,
};
columns[dsc.Name] = dsc;
}
}
var keys = tableMetadataRow.GetValue <string>("key_aliases")
.Replace("[", "")
.Replace("]", "")
.Split(',');
var keyTypes = tableMetadataRow.GetValue <string>("key_validator")
.Replace("org.apache.cassandra.db.marshal.CompositeType", "")
.Replace("(", "")
.Replace(")", "")
.Split(',');
for (var i = 0; i < keys.Length; i++)
{
var name = keys[i].Replace("\"", "").Trim();
var dataType = TypeCodec.ParseDataType(keyTypes[i].Trim());
var c = new TableColumn()
{
Name = name,
Keyspace = tableMetadataRow.GetValue <string>("keyspace_name"),
Table = tableMetadataRow.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
KeyType = KeyType.Partition
};
columns[name] = c;
partitionKeys.Add(Tuple.Create(i, c));
}
}
options.isCompactStorage = tableMetadataRow.GetColumn("is_dense") != null && tableMetadataRow.GetValue <bool>("is_dense");
if (!options.isCompactStorage)
{
//is_dense column does not exist in previous versions of Cassandra
//also, compact pk, ck and val appear as is_dense false
// clusteringKeys != comparator types - 1
// or not composite (comparator)
options.isCompactStorage = !comparatorComposite;
}
table = new TableMetadata(
tableName, columns.Values.ToArray(),
partitionKeys.OrderBy(p => p.Item1).Select(p => p.Item2).ToArray(),
options);
//Cache it
_tables.AddOrUpdate(tableName, table, (k, o) => table);
return(table);
}
/// <summary>
/// Returns metadata of specified table in this keyspace.
/// </summary>
/// <param name="tableName"> the name of table to retrieve </param>
/// <returns>the metadata for table <c>tableName</c> in this keyspace if it
/// exists, <c>null</c> otherwise.</returns>
public TableMetadata GetTableMetadata(string tableName)
{
TableMetadata table;
if (_tables.TryGetValue(tableName, out table))
{
//The table metadata is available in local cache
return(table);
}
var keyspaceName = Name;
var cols = new Dictionary <string, TableColumn>();
TableOptions options = null;
var tableMetadataRow = _cc.Query(String.Format(SelectSingleTable, tableName, keyspaceName), true).FirstOrDefault();
if (tableMetadataRow == null)
{
return(null);
}
var columnsMetadata = _cc.Query(String.Format(SelectColumns, tableName, keyspaceName), true);
foreach (var row in columnsMetadata)
{
var dataType = TypeCodec.ParseDataType(row.GetValue <string>("validator"));
var dsc = new TableColumn
{
Name = row.GetValue <string>("column_name"),
Keyspace = row.GetValue <string>("keyspace_name"),
Table = row.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
SecondaryIndexName = row.GetValue <string>("index_name"),
SecondaryIndexType = row.GetValue <string>("index_type"),
KeyType =
row.GetValue <string>("index_name") != null
? KeyType.SecondaryIndex
: KeyType.None,
};
cols.Add(dsc.Name, dsc);
}
var colNames = tableMetadataRow.GetValue <string>("column_aliases");
var rowKeys = colNames.Substring(1, colNames.Length - 2).Split(',');
for (var i = 0; i < rowKeys.Length; i++)
{
if (rowKeys[i].StartsWith("\""))
{
rowKeys[i] = rowKeys[i].Substring(1, rowKeys[i].Length - 2).Replace("\"\"", "\"");
}
}
if (rowKeys.Length > 0 && rowKeys[0] != string.Empty)
{
bool isCompact = true;
var comparator = tableMetadataRow.GetValue <string>("comparator");
//Remove reversed type
comparator = comparator.Replace(TypeCodec.ReversedTypeName, "");
if (comparator.StartsWith(TypeCodec.CompositeTypeName))
{
comparator = comparator.Replace(TypeCodec.CompositeTypeName, "");
isCompact = false;
}
var rg = new Regex(@"org\.apache\.cassandra\.db\.marshal\.\w+");
var rowKeysTypes = rg.Matches(comparator);
for (var i = 0; i < rowKeys.Length; i++)
{
var keyName = rowKeys[i];
var dataType = TypeCodec.ParseDataType(rowKeysTypes[i].ToString());
var dsc = new TableColumn
{
Name = keyName,
Keyspace = tableMetadataRow.GetValue <string>("keyspace_name"),
Table = tableMetadataRow.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
KeyType = KeyType.Clustering,
};
cols[dsc.Name] = dsc;
}
options = new TableOptions
{
isCompactStorage = isCompact,
bfFpChance = tableMetadataRow.GetValue <double>("bloom_filter_fp_chance"),
caching = tableMetadataRow.GetValue <string>("caching"),
comment = tableMetadataRow.GetValue <string>("comment"),
gcGrace = tableMetadataRow.GetValue <int>("gc_grace_seconds"),
localReadRepair = tableMetadataRow.GetValue <double>("local_read_repair_chance"),
readRepair = tableMetadataRow.GetValue <double>("read_repair_chance"),
compactionOptions = GetCompactionStrategyOptions(tableMetadataRow),
compressionParams =
(SortedDictionary <string, string>)Utils.ConvertStringToMap(tableMetadataRow.GetValue <string>("compression_parameters"))
};
//replicate_on_write column not present in C* >= 2.1
if (tableMetadataRow.GetColumn("replicate_on_write") != null)
{
options.replicateOnWrite = tableMetadataRow.GetValue <bool>("replicate_on_write");
}
}
//In Cassandra 1.2, the keys are not stored in the system.schema_columns table
//But you can get it from system.schema_columnfamilies
var keys = tableMetadataRow.GetValue <string>("key_aliases")
.Replace("[", "")
.Replace("]", "")
.Split(',');
var keyTypes = tableMetadataRow.GetValue <string>("key_validator")
.Replace("org.apache.cassandra.db.marshal.CompositeType", "")
.Replace("(", "")
.Replace(")", "")
.Split(',');
var partitionKeys = new TableColumn[keys.Length];
for (var i = 0; i < keys.Length; i++)
{
var name = keys[i].Replace("\"", "").Trim();
var dataType = TypeCodec.ParseDataType(keyTypes[i].Trim());
var c = new TableColumn()
{
Name = name,
Keyspace = tableMetadataRow.GetValue <string>("keyspace_name"),
Table = tableMetadataRow.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
KeyType = KeyType.Partition
};
cols[name] = c;
partitionKeys[i] = c;
}
table = new TableMetadata(tableName, cols.Values.ToArray(), partitionKeys, options);
//Cache it
_tables.AddOrUpdate(tableName, table, (k, o) => table);
return(table);
}
public TableMetadata GetTableMetadata(string tableName, string keyspaceName)
{
var cols = new Dictionary <string, TableColumn>();
TableOptions options = null;
{
var cqlQuery = string.Format(SelectColumns + " WHERE columnfamily_name='{0}' AND keyspace_name='{1}';", tableName, keyspaceName);
var rows = Query(cqlQuery);
foreach (var row in rows)
{
var dataType = TypeCodec.ParseDataType(row.GetValue <string>("validator"));
var dsc = new TableColumn
{
Name = row.GetValue <string>("column_name"),
Keyspace = row.GetValue <string>("keyspace_name"),
Table = row.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
SecondaryIndexName = row.GetValue <string>("index_name"),
SecondaryIndexType = row.GetValue <string>("index_type"),
KeyType =
row.GetValue <string>("index_name") != null
? KeyType.SecondaryIndex
: KeyType.None,
};
cols.Add(dsc.Name, dsc);
}
}
{
var cqlQuery = string.Format(SelectColumnFamilies + " WHERE columnfamily_name='{0}' AND keyspace_name='{1}';", tableName, keyspaceName);
var rows = Query(cqlQuery);
var row = rows.First();
var colNames = row.GetValue <string>("column_aliases");
var rowKeys = colNames.Substring(1, colNames.Length - 2).Split(',');
for (var i = 0; i < rowKeys.Length; i++)
{
if (rowKeys[i].StartsWith("\""))
{
rowKeys[i] = rowKeys[i].Substring(1, rowKeys[i].Length - 2).Replace("\"\"", "\"");
}
}
//Needs cleanup
if (rowKeys.Length > 0 && rowKeys[0] != string.Empty)
{
bool isCompact = true;
var comparator = row.GetValue <string>("comparator");
//Remove reversed type
comparator = comparator.Replace(TypeCodec.ReversedTypeName, "");
if (comparator.StartsWith(TypeCodec.CompositeTypeName))
{
comparator = comparator.Replace(TypeCodec.CompositeTypeName, "");
isCompact = false;
}
var rg = new Regex(@"org\.apache\.cassandra\.db\.marshal\.\w+");
MatchCollection rowKeysTypes = rg.Matches(comparator);
int i = 0;
foreach (var keyName in rowKeys)
{
var dataType = TypeCodec.ParseDataType(rowKeysTypes[i].ToString());
var dsc = new TableColumn
{
Name = keyName,
Keyspace = row.GetValue <string>("keyspace_name"),
Table = row.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
KeyType = KeyType.Clustering,
};
cols[dsc.Name] = dsc;
i++;
}
options = new TableOptions
{
isCompactStorage = isCompact,
bfFpChance = row.GetValue <double>("bloom_filter_fp_chance"),
caching = row.GetValue <string>("caching"),
comment = row.GetValue <string>("comment"),
gcGrace = row.GetValue <int>("gc_grace_seconds"),
localReadRepair = row.GetValue <double>("local_read_repair_chance"),
readRepair = row.GetValue <double>("read_repair_chance"),
compactionOptions = getCompactionStrategyOptions(row),
compressionParams =
(SortedDictionary <string, string>)Utils.ConvertStringToMap(row.GetValue <string>("compression_parameters"))
};
//replicate_on_write column not present in C* >= 2.1
if (row.GetColumn("replicate_on_write") != null)
{
options.replicateOnWrite = row.GetValue <bool>("replicate_on_write");
}
}
//In Cassandra 1.2, the keys are not stored in the system.schema_columns table
//But you can get it from system.schema_columnfamilies
var keys = row.GetValue <string>("key_aliases")
.Replace("[", "")
.Replace("]", "")
.Split(',');
var keyTypes = row.GetValue <string>("key_validator")
.Replace("org.apache.cassandra.db.marshal.CompositeType", "")
.Replace("(", "")
.Replace(")", "")
.Split(',');
for (var i = 0; i < keys.Length; i++)
{
var name = keys[i].Replace("\"", "").Trim();
var dataType = TypeCodec.ParseDataType(keyTypes[i].Trim());
cols[name] = new TableColumn()
{
Name = name,
Keyspace = row.GetValue <string>("keyspace_name"),
Table = row.GetValue <string>("columnfamily_name"),
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
KeyType = KeyType.Partition
};
}
}
return(new TableMetadata(tableName, cols.Values.ToArray(), options));
}
