private static SortedDictionary <string, string> GetCompactionStrategyOptions(Row row)
{
var result = new SortedDictionary <string, string> {
{ "class", row.GetValue <string>("compaction_strategy_class") }
};
foreach (var entry in Utils.ConvertStringToMap(row.GetValue <string>("compaction_strategy_options")))
{
result.Add(entry.Key, entry.Value);
}
return(result);
}
private KeyspaceMetadata ParseKeyspaceRow(IRow row)
{
if (row == null)
{
return(null);
}
return(new KeyspaceMetadata(
Parent,
row.GetValue <string>("keyspace_name"),
row.GetValue <bool>("durable_writes"),
row.GetValue <string>("strategy_class"),
Utils.ConvertStringToMap(row.GetValue <string>("strategy_options")),
false));
}
public override Task <TableMetadata> GetTable(string keyspaceName, string tableName)
{
var columns = new Dictionary <string, TableColumn>();
var partitionKeys = new List <Tuple <int, TableColumn> >();
var clusteringKeys = new List <Tuple <int, Tuple <TableColumn, SortOrder> > >();
return(Cc
.QueryAsync(string.Format(SelectSingleTable, tableName, keyspaceName), true)
.Then(rs =>
{
var tableMetadataRow = rs.FirstOrDefault();
if (tableMetadataRow == null)
{
return NullTableTask;
}
//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");
}
return Cc
.QueryAsync(string.Format(SelectColumns, tableName, keyspaceName), true)
.ContinueSync(columnsMetadata =>
{
foreach (var row in columnsMetadata)
{
var dataType = DataTypeParser.ParseFqTypeName(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,
#pragma warning disable 618
SecondaryIndexName = row.GetValue <string>("index_name"),
SecondaryIndexType = row.GetValue <string>("index_type"),
SecondaryIndexOptions = Utils.ParseJsonStringMap(row.GetValue <string>("index_options")),
#pragma warning restore 618
KeyType =
row.GetValue <string>("index_name") != null
? KeyType.SecondaryIndex
: KeyType.None
};
if (row.GetColumn("type") != null)
{
switch (row.GetValue <string>("type"))
{
case "partition_key":
partitionKeys.Add(Tuple.Create(row.GetValue <int?>("component_index") ?? 0, col));
col.KeyType = KeyType.Partition;
break;
case "clustering_key":
var sortOrder = dataType.IsReversed ? SortOrder.Descending : SortOrder.Ascending;
clusteringKeys.Add(Tuple.Create(row.GetValue <int?>("component_index") ?? 0, Tuple.Create(col, sortOrder)));
col.KeyType = KeyType.Clustering;
break;
case "static":
col.IsStatic = true;
break;
}
}
columns.Add(col.Name, col);
}
var comparator = tableMetadataRow.GetValue <string>("comparator");
if (tableMetadataRow.GetColumn("key_aliases") != null && partitionKeys.Count == 0)
{
//In C* 1.2, keys are not stored on the schema_columns table
var partitionKeyNames = Utils.ParseJsonStringArray(tableMetadataRow.GetValue <string>("key_aliases"));
var types = AdaptKeyTypes(tableMetadataRow.GetValue <string>("key_validator"));
for (var i = 0; i < partitionKeyNames.Length; i++)
{
var name = partitionKeyNames[i];
TableColumn c;
if (!columns.TryGetValue(name, out c))
{
c = new TableColumn
{
Name = name,
Keyspace = keyspaceName,
Table = tableName,
TypeCode = types[i].TypeCode,
TypeInfo = types[i].TypeInfo,
KeyType = KeyType.Partition
};
//The column is not part of columns metadata table
columns.Add(name, c);
}
partitionKeys.Add(Tuple.Create(i, c));
}
//In C* 1.2, keys are not stored on the schema_columns table
var clusteringKeyNames = Utils.ParseJsonStringArray(tableMetadataRow.GetValue <string>("column_aliases"));
if (clusteringKeyNames.Length > 0)
{
types = AdaptKeyTypes(comparator);
for (var i = 0; i < clusteringKeyNames.Length; i++)
{
var name = clusteringKeyNames[i];
TableColumn c;
var dataType = types[i];
if (!columns.TryGetValue(name, out c))
{
c = new TableColumn
{
Name = name,
Keyspace = keyspaceName,
Table = tableName,
TypeCode = dataType.TypeCode,
TypeInfo = dataType.TypeInfo,
KeyType = KeyType.Clustering
};
//The column is not part of columns metadata table
columns.Add(name, c);
}
clusteringKeys.Add(Tuple.Create(i, Tuple.Create(c, dataType.IsReversed ? SortOrder.Descending : SortOrder.Ascending)));
}
}
}
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 = !comparator.StartsWith(DataTypeParser.CompositeTypeName);
}
var result = new TableMetadata(tableName, GetIndexesFromColumns(columns.Values));
result.SetValues(
columns,
partitionKeys.OrderBy(p => p.Item1).Select(p => p.Item2).ToArray(),
clusteringKeys.OrderBy(p => p.Item1).Select(p => p.Item2).ToArray(),
options);
return result;
});
}));
}
public TableMetadata GetTableMetadata(string tableName, string keyspaceName)
{
object[] collectionValuesTypes;
List <TableColumn> cols = new List <TableColumn>();
TableOptions Options = null;
{
int streamId = _activeConnection.Value.AllocateStreamId();
using (var rows = ProcessRowset(_activeConnection.Value.Query(streamId,
string.Format(SelectColumns + " WHERE columnfamily_name='{0}' AND keyspace_name='{1}';",
tableName, keyspaceName), ConsistencyLevel.Default, false)))
{
foreach (var row in rows.GetRows())
{
var tp_code = convertToColumnTypeCode(row.GetValue <string>("validator"), out collectionValuesTypes);
var dsc = new TableColumn()
{
Name = row.GetValue <string>("column_name"),
Keyspace = row.GetValue <string>("keyspace_name"),
Table = row.GetValue <string>("columnfamily_name"),
TypeCode = tp_code,
SecondaryIndexName = row.GetValue <string>("index_name"),
SecondaryIndexType = row.GetValue <string>("index_type"),
KeyType =
row.GetValue <string>("index_name") != null
? KeyType.SecondaryIndex
: KeyType.None,
};
if (tp_code == ColumnTypeCode.List)
{
dsc.TypeInfo = new ListColumnInfo()
{
ValueTypeCode = (ColumnTypeCode)collectionValuesTypes[0]
}
}
;
else if (tp_code == ColumnTypeCode.Map)
{
dsc.TypeInfo = new MapColumnInfo()
{
KeyTypeCode = (ColumnTypeCode)collectionValuesTypes[0],
ValueTypeCode = (ColumnTypeCode)collectionValuesTypes[1]
}
}
;
else if (tp_code == ColumnTypeCode.Set)
{
dsc.TypeInfo = new SetColumnInfo()
{
KeyTypeCode = (ColumnTypeCode)collectionValuesTypes[0]
}
}
;
cols.Add(dsc);
}
}
}
{
int streamId = _activeConnection.Value.AllocateStreamId();
using (var rows = ProcessRowset(_activeConnection.Value.Query(streamId,
string.Format(
SelectColumnFamilies + " WHERE columnfamily_name='{0}' AND keyspace_name='{1}';",
tableName, keyspaceName), ConsistencyLevel.Default, false)))
{
foreach (var row in rows.GetRows()) // There is only one row!
{
var colNames = row.GetValue <string>("column_aliases");
var rowKeys = colNames.Substring(1, colNames.Length - 2).Split(',');
for (int 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;
string comparator = row.GetValue <string>("comparator");
if (comparator.StartsWith("org.apache.cassandra.db.marshal.CompositeType"))
{
comparator = comparator.Replace("org.apache.cassandra.db.marshal.CompositeType", "");
isCompact = false;
}
var rg = new Regex(@"org\.apache\.cassandra\.db\.marshal\.\w+");
var rowKeysTypes = rg.Matches(comparator);
int i = 0;
foreach (var keyName in rowKeys)
{
var tp_code = convertToColumnTypeCode(rowKeysTypes[i].ToString(),
out collectionValuesTypes);
var dsc = new TableColumn()
{
Name = keyName.ToString(),
Keyspace = row.GetValue <string>("keyspace_name"),
Table = row.GetValue <string>("columnfamily_name"),
TypeCode = tp_code,
KeyType = KeyType.Clustering,
};
if (tp_code == ColumnTypeCode.List)
{
dsc.TypeInfo = new ListColumnInfo()
{
ValueTypeCode = (ColumnTypeCode)collectionValuesTypes[0]
}
}
;
else if (tp_code == ColumnTypeCode.Map)
{
dsc.TypeInfo = new MapColumnInfo()
{
KeyTypeCode = (ColumnTypeCode)collectionValuesTypes[0],
ValueTypeCode = (ColumnTypeCode)collectionValuesTypes[1]
}
}
;
else if (tp_code == ColumnTypeCode.Set)
{
dsc.TypeInfo = new SetColumnInfo()
{
KeyTypeCode = (ColumnTypeCode)collectionValuesTypes[0]
}
}
;
cols.Add(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"),
replicateOnWrite = row.GetValue <bool>("replicate_on_write"),
compactionOptions = (SortedDictionary <string, string>)getCompactionStrategyOptions(row),
compressionParams = (SortedDictionary <string, string>)Utils.ConvertStringToMap(row.GetValue <string>("compression_parameters"))
};
}
cols.Add(new TableColumn()
{
Name =
row.GetValue <string>("key_aliases")
.Replace("[\"", "")
.Replace("\"]", "")
.Replace("\"\"", "\""),
Keyspace = row.GetValue <string>("keyspace_name"),
Table = row.GetValue <string>("columnfamily_name"),
TypeCode =
convertToColumnTypeCode(row.GetValue <string>("key_validator"), out collectionValuesTypes),
KeyType = KeyType.Partition
});
}
}
}
return(new TableMetadata(tableName, cols.ToArray(), Options));
}
/// <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));
}
