int
main(int argc, char *argv[])
{
TEST_OPTS *opts, _opts;
WT_CURSOR *balancecur, *flagcur, *joincur, *postcur;
WT_CURSOR *maincur;
WT_SESSION *session;
int balance, count, flag, key, key2, post, ret;
char balanceuri[256];
char cfg[128];
char flaguri[256];
char joinuri[256];
char posturi[256];
const char *tablename;
opts = &_opts;
memset(opts, 0, sizeof(*opts));
testutil_check(testutil_parse_opts(argc, argv, opts));
testutil_make_work_dir(opts->home);
testutil_progress(opts, "start");
testutil_check(wiredtiger_open(opts->home, NULL,
"create,cache_size=250M", &opts->conn));
testutil_progress(opts, "wiredtiger_open");
testutil_check(
opts->conn->open_session(opts->conn, NULL, NULL, &session));
testutil_progress(opts, "sessions opened");
/*
* Note: repeated primary key 'id' as 'id2'. This makes
* it easier to dump an index and know which record we're
* looking at.
*/
testutil_check(session->create(session, opts->uri,
"key_format=i,value_format=iiii,"
"columns=(id,post,balance,flag,id2)"));
tablename = strchr(opts->uri, ':');
testutil_assert(tablename != NULL);
tablename++;
testutil_check(__wt_snprintf(
posturi, sizeof(posturi), "index:%s:post", tablename));
testutil_check(__wt_snprintf(
balanceuri, sizeof(balanceuri), "index:%s:balance", tablename));
testutil_check(__wt_snprintf(
flaguri, sizeof(flaguri), "index:%s:flag", tablename));
testutil_check(__wt_snprintf(
joinuri, sizeof(joinuri), "join:%s", opts->uri));
testutil_check(session->create(session, posturi, "columns=(post)"));
testutil_check(session->create(session, balanceuri,
"columns=(balance)"));
testutil_check(session->create(session, flaguri, "columns=(flag)"));
testutil_progress(opts, "setup complete");
/*
* Insert a single record with all items we are search for,
* this makes our logic easier.
*/
testutil_check(session->open_cursor(session, opts->uri, NULL, NULL,
&maincur));
maincur->set_key(maincur, N_RECORDS);
maincur->set_value(maincur, 54321, 0, "", 0, N_RECORDS);
testutil_check(maincur->insert(maincur));
testutil_check(maincur->close(maincur));
testutil_check(session->close(session, NULL));
testutil_progress(opts, "populate start");
populate(opts);
testutil_progress(opts, "populate end");
testutil_check(opts->conn->open_session(
opts->conn, NULL, NULL, &session));
testutil_check(session->open_cursor(session,
posturi, NULL, NULL, &postcur));
testutil_check(session->open_cursor(session,
balanceuri, NULL, NULL, &balancecur));
testutil_check(session->open_cursor(session,
flaguri, NULL, NULL, &flagcur));
testutil_check(session->open_cursor(session,
joinuri, NULL, NULL, &joincur));
postcur->set_key(postcur, 54321);
testutil_check(postcur->search(postcur));
testutil_check(session->join(session, joincur, postcur,
"compare=eq"));
balancecur->set_key(balancecur, 0);
testutil_check(balancecur->search(balancecur));
testutil_check(__wt_snprintf(cfg, sizeof(cfg),
"compare=lt,strategy=bloom,count=%d", N_RECORDS / 100));
testutil_check(session->join(session, joincur, balancecur, cfg));
flagcur->set_key(flagcur, 0);
testutil_check(flagcur->search(flagcur));
testutil_check(__wt_snprintf(cfg, sizeof(cfg),
"compare=eq,strategy=bloom,count=%d", N_RECORDS / 100));
testutil_check(session->join(session, joincur, flagcur, cfg));
/* Expect no values returned */
count = 0;
while ((ret = joincur->next(joincur)) == 0) {
/*
* The values may already have been changed, but
* print them for informational purposes.
*/
testutil_check(joincur->get_key(joincur, &key));
testutil_check(joincur->get_value(joincur, &post,
&balance, &flag, &key2));
fprintf(stderr, "FAIL: "
"key=%d/%d, postal_code=%d, balance=%d, flag=%d\n",
key, key2, post, balance, flag);
count++;
}
testutil_assert(ret == WT_NOTFOUND);
testutil_assert(count == 0);
testutil_progress(opts, "cleanup starting");
testutil_cleanup(opts);
return (EXIT_SUCCESS);
}
int
main(int argc, char *argv[])
{
POP_RECORD *p;
TEST_OPTS *opts, _opts;
WT_CURSOR *country_cursor, *country_cursor2, *cursor, *join_cursor,
*subjoin_cursor, *year_cursor;
WT_SESSION *session;
const char *country, *tablename;
char countryuri[256], joinuri[256], yearuri[256];
uint64_t recno, population;
uint16_t year;
int count, ret;
opts = &_opts;
memset(opts, 0, sizeof(*opts));
testutil_check(testutil_parse_opts(argc, argv, opts));
testutil_make_work_dir(opts->home);
tablename = strchr(opts->uri, ':');
testutil_assert(tablename != NULL);
tablename++;
snprintf(countryuri, sizeof(countryuri), "index:%s:country", tablename);
snprintf(yearuri, sizeof(yearuri), "index:%s:year", tablename);
snprintf(joinuri, sizeof(joinuri), "join:%s", opts->uri);
testutil_check(wiredtiger_open(opts->home, NULL,
"create,cache_size=200M", &opts->conn));
testutil_check(
opts->conn->open_session(opts->conn, NULL, NULL, &session));
testutil_check(session->create(session, opts->uri,
"key_format=r,"
"value_format=5sHQ,"
"columns=(id,country,year,population)"));
/* Create an index with a simple key. */
testutil_check(session->create(session,
countryuri, "columns=(country)"));
/* Create an immutable index. */
testutil_check(session->create(session,
yearuri, "columns=(year),immutable"));
/* Insert the records into the table. */
testutil_check(session->open_cursor(
session, opts->uri, NULL, "append", &cursor));
count = 1;
for (p = pop_data; p->year != 0; p++) {
cursor->set_key(cursor, count);
cursor->set_value(cursor, p->country, p->year, p->population);
testutil_check(cursor->insert(cursor));
count++;
}
testutil_check(cursor->close(cursor));
/* Open cursors needed by the join. */
testutil_check(session->open_cursor(session,
joinuri, NULL, NULL, &join_cursor));
testutil_check(session->open_cursor(session,
countryuri, NULL, NULL, &country_cursor));
testutil_check(session->open_cursor(session,
yearuri, NULL, NULL, &year_cursor));
/* select values WHERE country == "AU" AND year > 1900 */
country_cursor->set_key(country_cursor, "AU\0\0\0");
testutil_check(country_cursor->search(country_cursor));
testutil_check(session->join(session, join_cursor, country_cursor,
"compare=eq,count=10"));
year_cursor->set_key(year_cursor, (uint16_t)1900);
testutil_check(year_cursor->search(year_cursor));
testutil_check(session->join(session, join_cursor, year_cursor,
"compare=gt,count=10,strategy=bloom"));
count = 0;
/* List the values that are joined */
while ((ret = join_cursor->next(join_cursor)) == 0) {
testutil_check(join_cursor->get_key(join_cursor, &recno));
testutil_check(join_cursor->get_value(join_cursor, &country,
&year, &population));
printf("ID %" PRIu64, recno);
printf(
": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
count++;
}
testutil_assert(ret == WT_NOTFOUND);
testutil_assert(count == 2);
testutil_check(join_cursor->close(join_cursor));
testutil_check(year_cursor->close(year_cursor));
testutil_check(country_cursor->close(country_cursor));
/* Open cursors needed by the join. */
testutil_check(session->open_cursor(session,
joinuri, NULL, NULL, &join_cursor));
testutil_check(session->open_cursor(session,
joinuri, NULL, NULL, &subjoin_cursor));
testutil_check(session->open_cursor(session,
countryuri, NULL, NULL, &country_cursor));
testutil_check(session->open_cursor(session,
countryuri, NULL, NULL, &country_cursor2));
testutil_check(session->open_cursor(session,
yearuri, NULL, NULL, &year_cursor));
/*
* select values WHERE (country == "AU" OR country == "UK")
* AND year > 1900
*
* First, set up the join representing the country clause.
*/
country_cursor->set_key(country_cursor, "AU\0\0\0");
testutil_check(country_cursor->search(country_cursor));
testutil_check(session->join(session, subjoin_cursor, country_cursor,
"operation=or,compare=eq,count=10"));
country_cursor2->set_key(country_cursor2, "UK\0\0\0");
testutil_check(country_cursor2->search(country_cursor2));
testutil_check(session->join(session, subjoin_cursor, country_cursor2,
"operation=or,compare=eq,count=10"));
/* Join that to the top join, and add the year clause */
testutil_check(session->join(session, join_cursor, subjoin_cursor,
NULL));
year_cursor->set_key(year_cursor, (uint16_t)1900);
testutil_check(year_cursor->search(year_cursor));
testutil_check(session->join(session, join_cursor, year_cursor,
"compare=gt,count=10,strategy=bloom"));
count = 0;
/* List the values that are joined */
while ((ret = join_cursor->next(join_cursor)) == 0) {
testutil_check(join_cursor->get_key(join_cursor, &recno));
testutil_check(join_cursor->get_value(join_cursor, &country,
&year, &population));
printf("ID %" PRIu64, recno);
printf(
": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
count++;
}
testutil_assert(ret == WT_NOTFOUND);
testutil_assert(count == 4);
testutil_check(join_cursor->close(join_cursor));
testutil_check(subjoin_cursor->close(subjoin_cursor));
testutil_check(country_cursor->close(country_cursor));
testutil_check(country_cursor2->close(country_cursor2));
testutil_check(year_cursor->close(year_cursor));
testutil_check(session->close(session, NULL));
testutil_cleanup(opts);
return (EXIT_SUCCESS);
}
int
main(int argc, char *argv[])
{
POP_RECORD *p;
WT_CONNECTION *conn;
WT_CURSOR *country_cursor, *country_cursor2, *cursor, *join_cursor,
*stat_cursor, *subjoin_cursor, *year_cursor;
WT_SESSION *session;
const char *country;
uint64_t recno, population;
uint16_t year;
int ret;
home = example_setup(argc, argv);
error_check(wiredtiger_open(
home, NULL, "create,statistics=(fast)", &conn));
error_check(conn->open_session(conn, NULL, NULL, &session));
/*! [Create a table with column groups] */
/*
* Create the population table.
* Keys are record numbers, the format for values is (5-byte string,
* uint16_t, uint64_t).
* See ::wiredtiger_struct_pack for details of the format strings.
*/
error_check(session->create(session, "table:poptable",
"key_format=r,"
"value_format=5sHQ,"
"columns=(id,country,year,population),"
"colgroups=(main,population)"));
/*
* Create two column groups: a primary column group with the country
* code, year and population (named "main"), and a population column
* group with the population by itself (named "population").
*/
error_check(session->create(session,
"colgroup:poptable:main", "columns=(country,year,population)"));
error_check(session->create(session,
"colgroup:poptable:population", "columns=(population)"));
/*! [Create a table with column groups] */
/*! [Create an index] */
/* Create an index with a simple key. */
error_check(session->create(session,
"index:poptable:country", "columns=(country)"));
/*! [Create an index] */
/*! [Create an index with a composite key] */
/* Create an index with a composite key (country,year). */
error_check(session->create(session,
"index:poptable:country_plus_year", "columns=(country,year)"));
/*! [Create an index with a composite key] */
/*! [Create an immutable index] */
/* Create an immutable index. */
error_check(session->create(session,
"index:poptable:immutable_year", "columns=(year),immutable"));
/*! [Create an immutable index] */
/* Insert the records into the table. */
error_check(session->open_cursor(
session, "table:poptable", NULL, "append", &cursor));
for (p = pop_data; p->year != 0; p++) {
cursor->set_value(cursor, p->country, p->year, p->population);
error_check(cursor->insert(cursor));
}
error_check(cursor->close(cursor));
/* Update records in the table. */
error_check(session->open_cursor(session,
"table:poptable", NULL, NULL, &cursor));
while ((ret = cursor->next(cursor)) == 0) {
error_check(cursor->get_key(cursor, &recno));
error_check(cursor->get_value(
cursor, &country, &year, &population));
cursor->set_value(cursor, country, year, population + 1);
error_check(cursor->update(cursor));
}
scan_end_check(ret == WT_NOTFOUND);
error_check(cursor->close(cursor));
/* List the records in the table. */
error_check(session->open_cursor(session,
"table:poptable", NULL, NULL, &cursor));
while ((ret = cursor->next(cursor)) == 0) {
error_check(cursor->get_key(cursor, &recno));
error_check(cursor->get_value(
cursor, &country, &year, &population));
printf("ID %" PRIu64, recno);
printf(
": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
}
scan_end_check(ret == WT_NOTFOUND);
error_check(cursor->close(cursor));
/*! [List the records in the table using raw mode.] */
/* List the records in the table using raw mode. */
error_check(session->open_cursor(session,
"table:poptable", NULL, "raw", &cursor));
while ((ret = cursor->next(cursor)) == 0) {
WT_ITEM key, value;
error_check(cursor->get_key(cursor, &key));
error_check(wiredtiger_struct_unpack(
session, key.data, key.size, "r", &recno));
printf("ID %" PRIu64, recno);
error_check(cursor->get_value(cursor, &value));
error_check(wiredtiger_struct_unpack(session,
value.data, value.size,
"5sHQ", &country, &year, &population));
printf(
": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
}
scan_end_check(ret == WT_NOTFOUND);
/*! [List the records in the table using raw mode.] */
error_check(cursor->close(cursor));
/*! [Read population from the primary column group] */
/*
* Open a cursor on the main column group, and return the information
* for a particular country.
*/
error_check(session->open_cursor(
session, "colgroup:poptable:main", NULL, NULL, &cursor));
cursor->set_key(cursor, 2);
error_check(cursor->search(cursor));
error_check(cursor->get_value(cursor, &country, &year, &population));
printf(
"ID 2: country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
/*! [Read population from the primary column group] */
error_check(cursor->close(cursor));
/*! [Read population from the standalone column group] */
/*
* Open a cursor on the population column group, and return the
* population of a particular country.
*/
error_check(session->open_cursor(session,
"colgroup:poptable:population", NULL, NULL, &cursor));
cursor->set_key(cursor, 2);
error_check(cursor->search(cursor));
error_check(cursor->get_value(cursor, &population));
printf("ID 2: population %" PRIu64 "\n", population);
/*! [Read population from the standalone column group] */
error_check(cursor->close(cursor));
/*! [Search in a simple index] */
/* Search in a simple index. */
error_check(session->open_cursor(session,
"index:poptable:country", NULL, NULL, &cursor));
cursor->set_key(cursor, "AU\0\0\0");
error_check(cursor->search(cursor));
error_check(cursor->get_value(cursor, &country, &year, &population));
printf("AU: country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
/*! [Search in a simple index] */
error_check(cursor->close(cursor));
/*! [Search in a composite index] */
/* Search in a composite index. */
error_check(session->open_cursor(session,
"index:poptable:country_plus_year", NULL, NULL, &cursor));
cursor->set_key(cursor, "USA\0\0", (uint16_t)1900);
error_check(cursor->search(cursor));
error_check(cursor->get_value(cursor, &country, &year, &population));
printf(
"US 1900: country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
/*! [Search in a composite index] */
error_check(cursor->close(cursor));
/*! [Return a subset of values from the table] */
/*
* Use a projection to return just the table's country and year
* columns.
*/
error_check(session->open_cursor(session,
"table:poptable(country,year)", NULL, NULL, &cursor));
while ((ret = cursor->next(cursor)) == 0) {
error_check(cursor->get_value(cursor, &country, &year));
printf("country %s, year %" PRIu16 "\n", country, year);
}
/*! [Return a subset of values from the table] */
scan_end_check(ret == WT_NOTFOUND);
error_check(cursor->close(cursor));
/*! [Return a subset of values from the table using raw mode] */
/*
* Use a projection to return just the table's country and year
* columns, using raw mode.
*/
error_check(session->open_cursor(session,
"table:poptable(country,year)", NULL, "raw", &cursor));
while ((ret = cursor->next(cursor)) == 0) {
WT_ITEM value;
error_check(cursor->get_value(cursor, &value));
error_check(wiredtiger_struct_unpack(
session, value.data, value.size, "5sH", &country, &year));
printf("country %s, year %" PRIu16 "\n", country, year);
}
scan_end_check(ret == WT_NOTFOUND);
/*! [Return a subset of values from the table using raw mode] */
error_check(cursor->close(cursor));
/*! [Return the table's record number key using an index] */
/*
* Use a projection to return just the table's record number key
* from an index.
*/
error_check(session->open_cursor(session,
"index:poptable:country_plus_year(id)", NULL, NULL, &cursor));
while ((ret = cursor->next(cursor)) == 0) {
error_check(cursor->get_key(cursor, &country, &year));
error_check(cursor->get_value(cursor, &recno));
printf("row ID %" PRIu64 ": country %s, year %" PRIu16 "\n",
recno, country, year);
}
scan_end_check(ret == WT_NOTFOUND);
/*! [Return the table's record number key using an index] */
error_check(cursor->close(cursor));
/*! [Return a subset of the value columns from an index] */
/*
* Use a projection to return just the population column from an
* index.
*/
error_check(session->open_cursor(session,
"index:poptable:country_plus_year(population)",
NULL, NULL, &cursor));
while ((ret = cursor->next(cursor)) == 0) {
error_check(cursor->get_key(cursor, &country, &year));
error_check(cursor->get_value(cursor, &population));
printf("population %" PRIu64 ": country %s, year %" PRIu16 "\n",
population, country, year);
}
scan_end_check(ret == WT_NOTFOUND);
/*! [Return a subset of the value columns from an index] */
error_check(cursor->close(cursor));
/*! [Access only the index] */
/*
* Use a projection to avoid accessing any other column groups when
* using an index: supply an empty list of value columns.
*/
error_check(session->open_cursor(session,
"index:poptable:country_plus_year()", NULL, NULL, &cursor));
while ((ret = cursor->next(cursor)) == 0) {
error_check(cursor->get_key(cursor, &country, &year));
printf("country %s, year %" PRIu16 "\n", country, year);
}
scan_end_check(ret == WT_NOTFOUND);
/*! [Access only the index] */
error_check(cursor->close(cursor));
/*! [Join cursors] */
/* Open cursors needed by the join. */
error_check(session->open_cursor(session,
"join:table:poptable", NULL, NULL, &join_cursor));
error_check(session->open_cursor(session,
"index:poptable:country", NULL, NULL, &country_cursor));
error_check(session->open_cursor(session,
"index:poptable:immutable_year", NULL, NULL, &year_cursor));
/* select values WHERE country == "AU" AND year > 1900 */
country_cursor->set_key(country_cursor, "AU\0\0\0");
error_check(country_cursor->search(country_cursor));
error_check(session->join(
session, join_cursor, country_cursor, "compare=eq,count=10"));
year_cursor->set_key(year_cursor, (uint16_t)1900);
error_check(year_cursor->search(year_cursor));
error_check(session->join(session,
join_cursor, year_cursor, "compare=gt,count=10,strategy=bloom"));
/* List the values that are joined */
while ((ret = join_cursor->next(join_cursor)) == 0) {
error_check(join_cursor->get_key(join_cursor, &recno));
error_check(join_cursor->get_value(
join_cursor, &country, &year, &population));
printf("ID %" PRIu64, recno);
printf(
": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
}
scan_end_check(ret == WT_NOTFOUND);
/*! [Join cursors] */
/*! [Statistics cursor join cursor] */
error_check(session->open_cursor(session,
"statistics:join",
join_cursor, NULL, &stat_cursor));
/*! [Statistics cursor join cursor] */
error_check(stat_cursor->close(stat_cursor));
error_check(join_cursor->close(join_cursor));
error_check(year_cursor->close(year_cursor));
error_check(country_cursor->close(country_cursor));
/*! [Complex join cursors] */
/* Open cursors needed by the join. */
error_check(session->open_cursor(session,
"join:table:poptable", NULL, NULL, &join_cursor));
error_check(session->open_cursor(session,
"join:table:poptable", NULL, NULL, &subjoin_cursor));
error_check(session->open_cursor(session,
"index:poptable:country", NULL, NULL, &country_cursor));
error_check(session->open_cursor(session,
"index:poptable:country", NULL, NULL, &country_cursor2));
error_check(session->open_cursor(session,
"index:poptable:immutable_year", NULL, NULL, &year_cursor));
/*
* select values WHERE (country == "AU" OR country == "UK")
* AND year > 1900
*
* First, set up the join representing the country clause.
*/
country_cursor->set_key(country_cursor, "AU\0\0\0");
error_check(country_cursor->search(country_cursor));
error_check(session->join(session, subjoin_cursor,
country_cursor, "operation=or,compare=eq,count=10"));
country_cursor2->set_key(country_cursor2, "UK\0\0\0");
error_check(country_cursor2->search(country_cursor2));
error_check(session->join(session, subjoin_cursor,
country_cursor2, "operation=or,compare=eq,count=10"));
/* Join that to the top join, and add the year clause */
error_check(session->join(session, join_cursor, subjoin_cursor, NULL));
year_cursor->set_key(year_cursor, (uint16_t)1900);
error_check(year_cursor->search(year_cursor));
error_check(session->join(session,
join_cursor, year_cursor, "compare=gt,count=10,strategy=bloom"));
/* List the values that are joined */
while ((ret = join_cursor->next(join_cursor)) == 0) {
error_check(join_cursor->get_key(join_cursor, &recno));
error_check(join_cursor->get_value(
join_cursor, &country, &year, &population));
printf("ID %" PRIu64, recno);
printf(
": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
}
scan_end_check(ret == WT_NOTFOUND);
/*! [Complex join cursors] */
error_check(join_cursor->close(join_cursor));
error_check(subjoin_cursor->close(subjoin_cursor));
error_check(country_cursor->close(country_cursor));
error_check(country_cursor2->close(country_cursor2));
error_check(year_cursor->close(year_cursor));
error_check(conn->close(conn, NULL));
return (EXIT_SUCCESS);
}
int
main(void)
{
POP_RECORD *p;
WT_CONNECTION *conn;
WT_CURSOR *cursor, *cursor2, *join_cursor, *stat_cursor;
WT_SESSION *session;
const char *country;
uint64_t recno, population;
uint16_t year;
int ret;
/*
* Create a clean test directory for this run of the test program if the
* environment variable isn't already set (as is done by make check).
*/
if (getenv("WIREDTIGER_HOME") == NULL) {
home = "WT_HOME";
ret = system("rm -rf WT_HOME && mkdir WT_HOME");
} else
home = NULL;
if ((ret = wiredtiger_open(
home, NULL, "create,statistics=(fast)", &conn)) != 0) {
fprintf(stderr, "Error connecting to %s: %s\n",
home, wiredtiger_strerror(ret));
return (ret);
}
/* Note: error checking omitted for clarity. */
ret = conn->open_session(conn, NULL, NULL, &session);
/*! [Create a table with column groups] */
/*
* Create the population table.
* Keys are record numbers, the format for values is (5-byte string,
* uint16_t, uint64_t).
* See ::wiredtiger_struct_pack for details of the format strings.
*/
ret = session->create(session, "table:poptable",
"key_format=r,"
"value_format=5sHQ,"
"columns=(id,country,year,population),"
"colgroups=(main,population)");
/*
* Create two column groups: a primary column group with the country
* code, year and population (named "main"), and a population column
* group with the population by itself (named "population").
*/
ret = session->create(session,
"colgroup:poptable:main", "columns=(country,year,population)");
ret = session->create(session,
"colgroup:poptable:population", "columns=(population)");
/*! [Create a table with column groups] */
/*! [Create an index] */
/* Create an index with a simple key. */
ret = session->create(session,
"index:poptable:country", "columns=(country)");
/*! [Create an index] */
/*! [Create an index with a composite key] */
/* Create an index with a composite key (country,year). */
ret = session->create(session,
"index:poptable:country_plus_year", "columns=(country,year)");
/*! [Create an index with a composite key] */
/*! [Create an immutable index] */
/* Create an immutable index. */
ret = session->create(session,
"index:poptable:immutable_year", "columns=(year),immutable");
/*! [Create an immutable index] */
/* Insert the records into the table. */
ret = session->open_cursor(
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->insert(cursor);
}
ret = cursor->close(cursor);
/* Update records in the table. */
ret = session->open_cursor(session,
"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->update(cursor);
}
ret = cursor->close(cursor);
/* List the records in the table. */
ret = session->open_cursor(session,
"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);
/*! [List the records in the table using raw mode.] */
/* List the records in the table using raw mode. */
ret = session->open_cursor(session,
"table:poptable", NULL, "raw", &cursor);
while ((ret = cursor->next(cursor)) == 0) {
WT_ITEM key, value;
ret = cursor->get_key(cursor, &key);
ret = wiredtiger_struct_unpack(session,
key.data, key.size, "r", &recno);
printf("ID %" PRIu64, recno);
ret = cursor->get_value(cursor, &value);
ret = wiredtiger_struct_unpack(session,
value.data, value.size,
"5sHQ", &country, &year, &population);
printf(
": country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
}
/*! [List the records in the table using raw mode.] */
ret = cursor->close(cursor);
/*! [Read population from the primary column group] */
/*
* Open a cursor on the main column group, and return the information
* for a particular country.
*/
ret = session->open_cursor(
session, "colgroup:poptable:main", NULL, NULL, &cursor);
cursor->set_key(cursor, 2);
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);
}
/*! [Read population from the primary column group] */
ret = cursor->close(cursor);
/*! [Read population from the standalone column group] */
/*
* Open a cursor on the population column group, and return the
* population of a particular country.
*/
ret = session->open_cursor(session,
"colgroup:poptable:population", NULL, NULL, &cursor);
cursor->set_key(cursor, 2);
if ((ret = cursor->search(cursor)) == 0) {
ret = cursor->get_value(cursor, &population);
printf("ID 2: population %" PRIu64 "\n", population);
}
/*! [Read population from the standalone column group] */
ret = cursor->close(cursor);
/*! [Search in a simple index] */
/* Search in a simple index. */
ret = session->open_cursor(session,
"index:poptable:country", NULL, NULL, &cursor);
cursor->set_key(cursor, "AU\0\0\0");
ret = cursor->search(cursor);
ret = cursor->get_value(cursor, &country, &year, &population);
printf("AU: country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
/*! [Search in a simple index] */
ret = cursor->close(cursor);
/*! [Search in a composite index] */
/* Search in a composite index. */
ret = session->open_cursor(session,
"index:poptable:country_plus_year", NULL, NULL, &cursor);
cursor->set_key(cursor, "USA\0\0", (uint16_t)1900);
ret = cursor->search(cursor);
ret = cursor->get_value(cursor, &country, &year, &population);
printf(
"US 1900: country %s, year %" PRIu16 ", population %" PRIu64 "\n",
country, year, population);
/*! [Search in a composite index] */
ret = cursor->close(cursor);
/*! [Return a subset of values from the table] */
/*
* Use a projection to return just the table's country and year
* columns.
*/
ret = session->open_cursor(session,
"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);
}
/*! [Return a subset of values from the table] */
ret = cursor->close(cursor);
/*! [Return a subset of values from the table using raw mode] */
/*
* Use a projection to return just the table's country and year
* columns, using raw mode.
*/
ret = session->open_cursor(session,
"table:poptable(country,year)", NULL, "raw", &cursor);
while ((ret = cursor->next(cursor)) == 0) {
WT_ITEM value;
ret = cursor->get_value(cursor, &value);
ret = wiredtiger_struct_unpack(
session, value.data, value.size, "5sH", &country, &year);
printf("country %s, year %" PRIu16 "\n", country, year);
}
/*! [Return a subset of values from the table using raw mode] */
ret = cursor->close(cursor);
/*! [Return the table's record number key using an index] */
/*
* Use a projection to return just the table's record number key
* from an index.
*/
ret = session->open_cursor(session,
"index:poptable:country_plus_year(id)", NULL, NULL, &cursor);
while ((ret = cursor->next(cursor)) == 0) {
ret = cursor->get_key(cursor, &country, &year);
ret = cursor->get_value(cursor, &recno);
printf("row ID %" PRIu64 ": country %s, year %" PRIu16 "\n",
recno, country, year);
}
/*! [Return the table's record number key using an index] */
ret = cursor->close(cursor);
/*! [Return a subset of the value columns from an index] */
/*
* Use a projection to return just the population column from an
* index.
*/
ret = session->open_cursor(session,
"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);
}
/*! [Return a subset of the value columns from an index] */
ret = cursor->close(cursor);
/*! [Access only the index] */
/*
* Use a projection to avoid accessing any other column groups when
* using an index: supply an empty list of value columns.
*/
ret = session->open_cursor(session,
"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);
}
/*! [Access only the index] */
ret = cursor->close(cursor);
/*! [Join cursors] */
/* Open cursors needed by the join. */
ret = session->open_cursor(session,
"join:table:poptable", NULL, NULL, &join_cursor);
ret = session->open_cursor(session,
"index:poptable:country", NULL, NULL, &cursor);
ret = session->open_cursor(session,
"index:poptable:immutable_year", NULL, NULL, &cursor2);
/* select values WHERE country == "AU" AND year > 1900 */
cursor->set_key(cursor, "AU\0\0\0");
ret = cursor->search(cursor);
ret = session->join(session, join_cursor, cursor,
"compare=eq,count=10");
cursor2->set_key(cursor2, (uint16_t)1900);
ret = cursor2->search(cursor2);
ret = session->join(session, join_cursor, cursor2,
"compare=gt,count=10,strategy=bloom");
/* List the values that are joined */
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);
}
/*! [Join cursors] */
/*! [Statistics cursor join cursor] */
ret = session->open_cursor(session,
"statistics:join",
join_cursor, NULL, &stat_cursor);
/*! [Statistics cursor join cursor] */
ret = stat_cursor->close(stat_cursor);
ret = join_cursor->close(join_cursor);
ret = cursor2->close(cursor2);
ret = cursor->close(cursor);
ret = conn->close(conn, NULL);
return (ret);
}