Modified query/simple/src/main/example.c

modified-simple-example.c

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 ******************************************************************************/


//==========================================================
// Includes
//

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>

#include <aerospike/aerospike.h>
#include <aerospike/aerospike_key.h>
#include <aerospike/aerospike_query.h>
#include <aerospike/as_error.h>
#include <aerospike/as_key.h>
#include <aerospike/as_query.h>
#include <aerospike/as_record.h>
#include <aerospike/as_status.h>
#include <aerospike/as_val.h>

#include "example_utils.h"


//==========================================================
// Constants
//

const char TEST_INDEX_NAME[] = "timestamp";


//==========================================================
// Forward Declarations
//

bool query_cb(const as_val* p_val, void* udata);
bool insert_records(aerospike* p_as);


//==========================================================
// SIMPLE QUERY Example
//

int
main(int argc, char* argv[])
{
	// Parse command line arguments.
	if (! example_get_opts(argc, argv, EXAMPLE_MULTI_KEY_OPTS)) {
		exit(-1);
	}

	// Connect to the aerospike database cluster.
	aerospike as;
	example_connect_to_aerospike(&as);

	as_error err;

	// Create an as_query object.
	as_query query;
	as_query_init(&query, "test", "demo2");

	// Generate an as_query.where condition. Note that as_query_destroy() takes
	// care of destroying all the query's member objects if necessary. However
	// using as_query_where_inita() does avoid internal heap usage.
	as_query_select_inita(&query, 2);
	as_query_select(&query, "stamp");
	as_query_select(&query, "originalId");

	as_query_where_inita(&query, 1);
	as_query_where(&query, "stamp", integer_range(1,9999999999));

	// Execute the query. This call blocks - callbacks are made in the scope of
	// this call.
	if (aerospike_query_foreach(&as, &err, NULL, &query, query_cb, NULL) !=
			AEROSPIKE_OK) {
		LOG("aerospike_query_foreach() returned %d - %s", err.code,
				err.message);
		as_query_destroy(&query);
		exit(-1);
	}

	LOG("query executed");

	as_query_destroy(&query);

	LOG("simple query example successfully completed");

	return 0;
}


//==========================================================
// Query Callback
//

bool
query_cb(const as_val* p_val, void* udata)
{
	if (! p_val) {
		LOG("query callback returned null - query is complete");
		return true;
	}

	// The query didn't use a UDF, so the as_val object should be an as_record.
	as_record* p_rec = as_record_fromval(p_val);

	if (! p_rec) {
		LOG("query callback returned non-as_record object");
		return true;
	}

	LOG("query callback returned record:");
//	example_dump_record(p_rec);

	return true;
}


//==========================================================
// Helpers
//

bool
insert_records(aerospike* p_as)
{
	// Create an as_record object with one (integer value) bin. By using
	// as_record_inita(), we won't need to destroy the record if we only set
	// bins using as_record_set_int64().
	as_record rec;
	as_record_inita(&rec, 1);

	// Re-using rec, write records into the database such that each record's key
	// and (test-bin) value is based on the loop index.
	for (uint32_t i = 0; i < g_n_keys; i++) {
		as_error err;

		// No need to destroy a stack as_key object, if we only use
		// as_key_init_int64().
		as_key key;
		as_key_init_int64(&key, g_namespace, g_set, (int64_t)i);

		// In general it's ok to reset a bin value - all as_record_set_... calls
		// destroy any previous value.
		as_record_set_int64(&rec, "test-bin", (int64_t)i);

		// Write a record to the database.
		if (aerospike_key_put(p_as, &err, NULL, &key, &rec) != AEROSPIKE_OK) {
			LOG("aerospike_key_put() returned %d - %s", err.code, err.message);
			return false;
		}
	}

	LOG("insert succeeded");

	return true;
}