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Datastax Cassandra c++ driver - Get metadata from tuple fields
2019 Community Moderator ElectionWhat are the differences between a pointer variable and a reference variable in C++?Why is reading lines from stdin much slower in C++ than Python?How to add arbitrary columns to Cassandra using CQL with Datastax Java driver?Write timeout thrown by cassandra datastax driverReplacing a 32-bit loop counter with 64-bit introduces crazy performance deviationscassandra udt: when adding a new field into udt type, columns only shows old udt type dataDatastax Cassandra C/C++ driver cass_cluster_set_blacklist_filtering functionalityCassandra column metadata shows “DateType” instead of “timestamp” after driver upgradeDatastax driver - limit columns and fetch columns rangePython Cassandra Driver: encoding issue during insertion
What I want to do is to save the metadata from all columns in the table that I declared previously only if it contains the tuple type.
First of all, I declare a keyspace and a table with an id (int, PK) and a tuple (int,str,int).
Second, I get the metadata from the named table.
const CassTableMeta *table_meta = cass_keyspace_meta_table_by_name(keyspace_meta, this->table.c_str());
Third, I want to iterate through all the columns of the table to get the metadata in every column only if the column is of tuple type, and the type of every field in the column.
CassIterator *iterator = cass_iterator_columns_from_table_meta(table_meta);
while (cass_iterator_next(iterator)) {
if(cass_iterator_type(iterator) == CASS_VALUE_TYPE_TUPLE)
const CassColumnMeta *cmeta = cass_iterator_get_column_meta(iterator);
CassIterator *cit = cass_iterator_fields_from_column_meta(cmeta);
while (cass_iterator_next(cit)) {
//get metadata of every field (int, str, int) using cass_data_type_type(...)
So, in the case my code is moreless correct, I want to get the metada of the tuple column and the metadata of every field (int, str, int) using cass_data_type_type(...).
c++ apache cassandra datastax
asked Mar 7 at 17:16
Jack FennJack Fenn
154
add a comment |
What I want to do is to save the metadata from all columns in the table that I declared previously only if it contains the tuple type.
First of all, I declare a keyspace and a table with an id (int, PK) and a tuple (int,str,int).
Second, I get the metadata from the named table.
const CassTableMeta *table_meta = cass_keyspace_meta_table_by_name(keyspace_meta, this->table.c_str());
Third, I want to iterate through all the columns of the table to get the metadata in every column only if the column is of tuple type, and the type of every field in the column.
CassIterator *iterator = cass_iterator_columns_from_table_meta(table_meta);
while (cass_iterator_next(iterator)) {
if(cass_iterator_type(iterator) == CASS_VALUE_TYPE_TUPLE)
const CassColumnMeta *cmeta = cass_iterator_get_column_meta(iterator);
CassIterator *cit = cass_iterator_fields_from_column_meta(cmeta);
while (cass_iterator_next(cit)) {
//get metadata of every field (int, str, int) using cass_data_type_type(...)
So, in the case my code is moreless correct, I want to get the metada of the tuple column and the metadata of every field (int, str, int) using cass_data_type_type(...).
c++ apache cassandra datastax
asked Mar 7 at 17:16
Jack FennJack Fenn
154
add a comment |
What I want to do is to save the metadata from all columns in the table that I declared previously only if it contains the tuple type.
First of all, I declare a keyspace and a table with an id (int, PK) and a tuple (int,str,int).
Second, I get the metadata from the named table.
const CassTableMeta *table_meta = cass_keyspace_meta_table_by_name(keyspace_meta, this->table.c_str());
Third, I want to iterate through all the columns of the table to get the metadata in every column only if the column is of tuple type, and the type of every field in the column.
CassIterator *iterator = cass_iterator_columns_from_table_meta(table_meta);
while (cass_iterator_next(iterator)) {
if(cass_iterator_type(iterator) == CASS_VALUE_TYPE_TUPLE)
const CassColumnMeta *cmeta = cass_iterator_get_column_meta(iterator);
CassIterator *cit = cass_iterator_fields_from_column_meta(cmeta);
while (cass_iterator_next(cit)) {
//get metadata of every field (int, str, int) using cass_data_type_type(...)
So, in the case my code is moreless correct, I want to get the metada of the tuple column and the metadata of every field (int, str, int) using cass_data_type_type(...).
c++ apache cassandra datastax
asked Mar 7 at 17:16
Jack FennJack Fenn
154
What I want to do is to save the metadata from all columns in the table that I declared previously only if it contains the tuple type.
First of all, I declare a keyspace and a table with an id (int, PK) and a tuple (int,str,int).
Second, I get the metadata from the named table.
const CassTableMeta *table_meta = cass_keyspace_meta_table_by_name(keyspace_meta, this->table.c_str());
Third, I want to iterate through all the columns of the table to get the metadata in every column only if the column is of tuple type, and the type of every field in the column.
CassIterator *iterator = cass_iterator_columns_from_table_meta(table_meta);
while (cass_iterator_next(iterator)) {
if(cass_iterator_type(iterator) == CASS_VALUE_TYPE_TUPLE)
const CassColumnMeta *cmeta = cass_iterator_get_column_meta(iterator);
CassIterator *cit = cass_iterator_fields_from_column_meta(cmeta);
while (cass_iterator_next(cit)) {
//get metadata of every field (int, str, int) using cass_data_type_type(...)
So, in the case my code is moreless correct, I want to get the metada of the tuple column and the metadata of every field (int, str, int) using cass_data_type_type(...).
c++ apache cassandra datastax
c++ apache cassandra datastax
asked Mar 7 at 17:16
Jack FennJack Fenn
154
asked Mar 7 at 17:16
Jack FennJack Fenn
154
edited Mar 8 at 8:40
Jack Fenn
asked Mar 7 at 17:16
Jack FennJack Fenn
154
asked Mar 7 at 17:16
Jack FennJack Fenn
154
asked Mar 7 at 17:16
Jack FennJack Fenn
154
154
add a comment |
add a comment |
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