static
void roqet_print_query(rasqal_query* rq,
raptor_world* raptor_world_ptr,
query_output_format output_format,
raptor_uri* base_uri)
{
fprintf(stderr, "Query:\n");
switch(output_format) {
case QUERY_OUTPUT_DEBUG:
rasqal_query_print(rq, stdout);
break;
case QUERY_OUTPUT_STRUCTURE:
roqet_query_walk(rq, stdout, 0);
break;
case QUERY_OUTPUT_SPARQL:
if(1) {
raptor_iostream* output_iostr;
output_iostr = raptor_new_iostream_to_file_handle(raptor_world_ptr,
stdout);
rasqal_query_write(output_iostr, rq, NULL, base_uri);
raptor_free_iostream(output_iostr);
}
break;
case QUERY_OUTPUT_UNKNOWN:
default:
fprintf(stderr, "%s: Unknown query output format %d\n", program,
output_format);
abort();
}
}
/**
* rasqal_query_results_execute_with_engine:
* @query_results: the #rasqal_query_results object
* @engine: execution factory
* @store_results: non-0 to store query results
*
* INTERNAL - Create a new query results set executing a prepared query with the given execution engine
*
* return value: non-0 on failure
**/
int
rasqal_query_results_execute_with_engine(rasqal_query_results* query_results,
const rasqal_query_execution_factory* engine,
int store_results)
{
int rc = 0;
size_t ex_data_size;
rasqal_query* query;
RASQAL_ASSERT_OBJECT_POINTER_RETURN_VALUE(query_results, rasqal_query_results, 1);
query = query_results->query;
if(query->failed)
return 1;
query_results->execution_factory = engine;
/* set executed flag early to enable cleanup on error */
query_results->executed = 1;
/* ensure stored results are present if ordering or distincting are being done */
query_results->store_results = (store_results ||
rasqal_query_get_order_conditions_sequence(query) ||
query->distinct);
ex_data_size = query_results->execution_factory->execution_data_size;
if(ex_data_size > 0) {
query_results->execution_data = RASQAL_CALLOC(data, 1, ex_data_size);
if(!query_results->execution_data)
return 1;
} else
query_results->execution_data = NULL;
/* Update the current datetime once per query execution */
rasqal_world_reset_now(query->world);
if(query_results->execution_factory->execute_init) {
rasqal_engine_error execution_error = RASQAL_ENGINE_OK;
int execution_flags = 0;
if(query_results->store_results)
execution_flags |= 1;
rc = query_results->execution_factory->execute_init(query_results->execution_data, query, query_results, execution_flags, &execution_error);
if(rc || execution_error != RASQAL_ENGINE_OK) {
query_results->failed = 1;
return 1;
}
}
#ifdef RASQAL_DEBUG
RASQAL_DEBUG1("After execute_init, query is now:\n");
rasqal_query_print(query, stderr);
#endif
/* Choose either to execute all now and store OR do it on demand (lazy) */
if(query_results->store_results)
rc = rasqal_query_results_execute_and_store_results(query_results);
return rc;
}