Shows how to create column-oriented data and access individual columns.
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wiredtiger.h>
static const char *home;
typedef struct {
        char country[5];
        uint16_t year;
        uint64_t population;
} POP_RECORD;
static POP_RECORD pop_data[] = {
        { "AU",  1900,    4000000 },
        { "AU",  1950,    8267337 },
        { "AU",  2000,   19053186 },
        { "CAN", 1900,    5500000 },
        { "CAN", 1950,   14011422 },
        { "CAN", 2000,   31099561 },
        { "UK",  1900,  369000000 },
        { "UK",  1950,   50127000 },
        { "UK",  2000,   59522468 },
        { "USA", 1900,   76212168 },
        { "USA", 1950,  150697361 },
        { "USA", 2000,  301279593 },
        { "", 0, 0 }
};
int
main(void)
{
        POP_RECORD *p;
        WT_CURSOR *country_cursor, *country_cursor2, *cursor, *join_cursor,
 
            *stat_cursor, *subjoin_cursor, *year_cursor;
        const char *country;
        uint64_t recno, population;
        uint16_t year;
        int ret;
        
        if (getenv("WIREDTIGER_HOME") == NULL) {
                home = "WT_HOME";
                ret = system("rm -rf WT_HOME && mkdir WT_HOME");
        } else
                home = NULL;
            home, NULL, "create,statistics=(fast)", &conn)) != 0) {
                fprintf(stderr, "Error connecting to %s: %s\n",
                return (EXIT_FAILURE);
        }
        
        
        ret = session->
create(session, 
"table:poptable",
            "key_format=r,"
            "value_format=5sHQ,"
            "columns=(id,country,year,population),"
            "colgroups=(main,population)");
        
        ret = session->
create(session,
            "colgroup:poptable:main", "columns=(country,year,population)");
        ret = session->
create(session,
            "colgroup:poptable:population", "columns=(population)");
        
        ret = session->
create(session,
            "index:poptable:country", "columns=(country)");
        
        ret = session->
create(session,
            "index:poptable:country_plus_year", "columns=(country,year)");
        
        ret = session->
create(session,
            "index:poptable:immutable_year", "columns=(year),immutable");
        
            session, "table:poptable", NULL, "append", &cursor);
        for (p = pop_data; p->year != 0; p++) {
                cursor->
set_value(cursor, p->country, p->year, p->population);
        }
        ret = cursor->
close(cursor);
        
            "table:poptable", NULL, NULL, &cursor);
        while ((ret = cursor->
next(cursor)) == 0) {
 
                ret = cursor->
get_key(cursor, &recno);
                ret = cursor->
get_value(cursor, &country, &year, &population);
                cursor->
set_value(cursor, country, year, population + 1);
        }
        ret = cursor->
close(cursor);
        
            "table:poptable", NULL, NULL, &cursor);
        while ((ret = cursor->
next(cursor)) == 0) {
 
                ret = cursor->
get_key(cursor, &recno);
                ret = cursor->
get_value(cursor, &country, &year, &population);
                printf("ID %" PRIu64, recno);
                printf(
                    ": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
                    country, year, population);
        }
        ret = cursor->
close(cursor);
        
            "table:poptable", NULL, "raw", &cursor);
        while ((ret = cursor->
next(cursor)) == 0) {
 
                ret = cursor->
get_key(cursor, &key);
                printf("ID %" PRIu64, recno);
                    "5sHQ", &country, &year, &population);
                printf(
                    ": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
                    country, year, population);
        }
        ret = cursor->
close(cursor);
        
            session, "colgroup:poptable:main", NULL, NULL, &cursor);
        if ((ret = cursor->
search(cursor)) == 0) {
 
                ret = cursor->
get_value(cursor, &country, &year, &population);
                printf(
                    "ID 2: "
                    "country %s, year %" PRIu16 ", population %" PRIu64 "\n",
                    country, year, population);
        }
        ret = cursor->
close(cursor);
        
            "colgroup:poptable:population", NULL, NULL, &cursor);
        if ((ret = cursor->
search(cursor)) == 0) {
 
                ret = cursor->
get_value(cursor, &population);
                printf("ID 2: population %" PRIu64 "\n", population);
        }
        ret = cursor->
close(cursor);
        
            "index:poptable:country", NULL, NULL, &cursor);
        cursor->
set_key(cursor, 
"AU\0\0\0");
        ret = cursor->
get_value(cursor, &country, &year, &population);
        printf("AU: country %s, year %" PRIu16 ", population %" PRIu64 "\n",
            country, year, population);
        ret = cursor->
close(cursor);
        
            "index:poptable:country_plus_year", NULL, NULL, &cursor);
        cursor->
set_key(cursor, 
"USA\0\0", (uint16_t)1900);
        ret = cursor->
get_value(cursor, &country, &year, &population);
        printf(
            "US 1900: country %s, year %" PRIu16 ", population %" PRIu64 "\n",
            country, year, population);
        ret = cursor->
close(cursor);
        
            "table:poptable(country,year)", NULL, NULL, &cursor);
        while ((ret = cursor->
next(cursor)) == 0) {
 
                ret = cursor->
get_value(cursor, &country, &year);
                printf("country %s, year %" PRIu16 "\n", country, year);
        }
        ret = cursor->
close(cursor);
        
            "table:poptable(country,year)", NULL, "raw", &cursor);
        while ((ret = cursor->
next(cursor)) == 0) {
 
                    session, value.
data, value.
size, 
"5sH", &country, &year);
                printf("country %s, year %" PRIu16 "\n", country, year);
        }
        ret = cursor->
close(cursor);
        
            "index:poptable:country_plus_year(id)", NULL, NULL, &cursor);
        while ((ret = cursor->
next(cursor)) == 0) {
 
                ret = cursor->
get_key(cursor, &country, &year);
                printf("row ID %" PRIu64 ": country %s, year %" PRIu16 "\n",
                    recno, country, year);
        }
        ret = cursor->
close(cursor);
        
            "index:poptable:country_plus_year(population)",
            NULL, NULL, &cursor);
        while ((ret = cursor->
next(cursor)) == 0) {
 
                ret = cursor->
get_key(cursor, &country, &year);
                ret = cursor->
get_value(cursor, &population);
                printf("population %" PRIu64 ": country %s, year %" PRIu16 "\n",
                    population, country, year);
        }
        ret = cursor->
close(cursor);
        
            "index:poptable:country_plus_year()", NULL, NULL, &cursor);
        while ((ret = cursor->
next(cursor)) == 0) {
 
                ret = cursor->
get_key(cursor, &country, &year);
                printf("country %s, year %" PRIu16 "\n", country, year);
        }
        ret = cursor->
close(cursor);
        
            "join:table:poptable", NULL, NULL, &join_cursor);
            "index:poptable:country", NULL, NULL, &country_cursor);
            "index:poptable:immutable_year", NULL, NULL, &year_cursor);
        
        country_cursor->
set_key(country_cursor, 
"AU\0\0\0");
        ret = country_cursor->
search(country_cursor);
        ret = session->
join(session, join_cursor, country_cursor,
            "compare=eq,count=10");
        year_cursor->
set_key(year_cursor, (uint16_t)1900);
        ret = year_cursor->
search(year_cursor);
        ret = session->
join(session, join_cursor, year_cursor,
            "compare=gt,count=10,strategy=bloom");
        
        while ((ret = join_cursor->
next(join_cursor)) == 0) {
 
                ret = join_cursor->
get_key(join_cursor, &recno);
                ret = join_cursor->
get_value(join_cursor, &country, &year,
                    &population);
                printf("ID %" PRIu64, recno);
                printf(
                    ": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
                    country, year, population);
        }
            "statistics:join",
            join_cursor, NULL, &stat_cursor);
        ret = stat_cursor->
close(stat_cursor);
        ret = join_cursor->
close(join_cursor);
        ret = year_cursor->
close(year_cursor);
        ret = country_cursor->
close(country_cursor);
        
            "join:table:poptable", NULL, NULL, &join_cursor);
            "join:table:poptable", NULL, NULL, &subjoin_cursor);
            "index:poptable:country", NULL, NULL, &country_cursor);
            "index:poptable:country", NULL, NULL, &country_cursor2);
            "index:poptable:immutable_year", NULL, NULL, &year_cursor);
        
        country_cursor->
set_key(country_cursor, 
"AU\0\0\0");
        ret = country_cursor->
search(country_cursor);
        ret = session->
join(session, subjoin_cursor, country_cursor,
            "operation=or,compare=eq,count=10");
        country_cursor2->
set_key(country_cursor2, 
"UK\0\0\0");
        ret = country_cursor2->
search(country_cursor2);
        ret = session->
join(session, subjoin_cursor, country_cursor2,
            "operation=or,compare=eq,count=10");
        
        ret = session->
join(session, join_cursor, subjoin_cursor, NULL);
        year_cursor->
set_key(year_cursor, (uint16_t)1900);
        ret = year_cursor->
search(year_cursor);
        ret = session->
join(session, join_cursor, year_cursor,
            "compare=gt,count=10,strategy=bloom");
        
        while ((ret = join_cursor->
next(join_cursor)) == 0) {
 
                ret = join_cursor->
get_key(join_cursor, &recno);
                ret = join_cursor->
get_value(join_cursor, &country, &year,
                    &population);
                printf("ID %" PRIu64, recno);
                printf(
                    ": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
                    country, year, population);
        }
        ret = join_cursor->
close(join_cursor);
        ret = subjoin_cursor->
close(subjoin_cursor);
        ret = country_cursor->
close(country_cursor);
        ret = country_cursor2->
close(country_cursor2);
        ret = year_cursor->
close(year_cursor);
        ret = conn->
close(conn, NULL);
        return (ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}