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mcSTcolAttributes — Obtain the attributes of a column of a sparse-table dataset
#include <memcom.h>
int mcSTcolAttributes(int dsid, mcInt64 column_index,
char* name, char* type, mcInt64* num_elements);mcSTcolAttributes obtains, for the
sparse-table dataset identified by dsid, the
column attributes as they were set when the column was created by
calling mcSTcolAppend.
dsid (input)Dataset identifier.
column_index (input)Index of the column whose attributes are inquired about. Column indices start at 1.
name (output)If not NULL, the name of the column will be copied as
a NUL-terminated character string to
name. The buffer must be at least 64
characters long.
type (output)If not NULL, the data element type of the column will
be copied as a NUL-terminated character string to
type. The buffer must be at least 2
characters long.
num_elements (output)If not NULL, the number of data elements for the
column will be copied to num_elements,
which is in this case a pointer to a single element of type
mcInt64. A value of 0 indicates a
variable-sized column, where for each cell belonging to this
column, the actual number of elements can be obtained by
calling mcSTcellNumElements.