Looks up length of char and string attribute fields.
hcerr_t hc_schema_get_length(hc_schema_t *schema, char *name, int *length);
This function looks up the length of a char or string field associated with a given attribute name in the current metadata schema, or returns an error if the name is not known.
IN: The schema to interrogate.
IN: The attribute name to look up in the schema.
OUT: Updated to be the length of the field associated with that name in the schema.
HCERR_OK HCERR_BAD_REQUEST HCERR_INVALID_SCHEMA HCERR_ILLEGAL_ARGUMENT