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Diffstat (limited to 'manuals_and_examples/examples/c++/query.cc')
| -rw-r--r-- | manuals_and_examples/examples/c++/query.cc | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/manuals_and_examples/examples/c++/query.cc b/manuals_and_examples/examples/c++/query.cc new file mode 100644 index 0000000..9bcf16e --- /dev/null +++ b/manuals_and_examples/examples/c++/query.cc @@ -0,0 +1,172 @@ +/* +* This file is part of rasdaman community. +* +* Rasdaman community is free software: you can redistribute it and/or modify +* it under the terms of the GNU General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* Rasdaman community is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>. +* +* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann / +rasdaman GmbH. +* +* For more information please see <http://www.rasdaman.org> +* or contact Peter Baumann via <baumann@rasdaman.com>. +*/ +/************************************************************* + * + * + * PURPOSE: + * Example program for RasML query invocation from C++. + * + * + ************************************************************/ + +#include <iostream> + +// Linux needs this for template instantiation +#ifdef EARLY_TEMPLATE +#define __EXECUTABLE__ +#ifdef __GNUG__ +#include "raslib/template_inst.hh" +#endif +#endif + +// this file is generated by the rasdl processor +#include "basictypes.hh" + + +int main( int ac, char** av ) +{ + char rasmgrName[255]; + int rasmgrPort; + char baseName[255]; + char collName[255]; + char userName[255]; + char userPass[255]; + + if( ac != 7 ) + { + cout << "Usage: query rasmgr_name rasmgr_port base_name collection_name user_name user_passwd" << endl; + return -1; + } + + strcpy( rasmgrName, av[1] ); + rasmgrPort = strtoul( av[2], NULL, 0); + strcpy( baseName, av[3] ); + strcpy( collName, av[4] ); + strcpy( userName, av[5] ); + strcpy( userPass, av[6] ); + + r_Minterval select_domain = r_Minterval("[0:4,0:4]"); + r_Minterval where_domain = r_Minterval("[8:9,8:9]"); + r_ULong threshold_value = 10; + + r_Database database; + r_Transaction transaction; + r_Set< r_Ref< r_GMarray > > image_set; + r_Ref< r_GMarray > image; + r_Iterator< r_Ref< r_GMarray > > iter; + + try + { + database.set_servername( rasmgrName, rasmgrPort ); + database.set_useridentification( userName, userPass ); + + cout << "Opening database " << baseName + << " on " << rasmgrName << "... " << flush; + + database.open( baseName ); + cout << "OK" << endl; + + cout << "Starting read-only transaction ... " << flush; + transaction.begin( r_Transaction::read_only ); + cout << "OK" << endl; + + cout << "Creating the query object ..." << flush; + r_OQL_Query query("select a$1 from $2 as a where some_cells( a$3 > $4 )"); + cout << "OK, Query string is: " << query.get_query() << endl; + + cout << "Substituting query parameters ..." << flush; + query << select_domain << collName << where_domain << threshold_value; + cout << "OK, Query string is: " << query.get_query() << endl; + + cout << "Executing the query ..." << flush; + try + { + r_oql_execute( query, image_set ); + } + catch( r_Error& errorObj ) + { + cout << "FAILED" << endl << errorObj.what() << endl; + + cout << "Aborting transaction ... " << flush; + transaction.abort(); + cout << "OK" << endl; + + cout << "Closing database ... " << flush; + database.close(); + cout << "OK" << endl; + return -1; + } + cout << "OK" << endl << endl; + + cout << "Collection" << endl; + cout << " Oid...................: " << image_set.get_oid() << endl; + cout << " Type Name.............: " << image_set.get_object_name() << endl; + cout << " Type Structure........: " + << ( image_set.get_type_structure() ? image_set.get_type_structure() : "<nn>" ) + << endl; + cout << " Type Schema...........: " << flush; + if( image_set.get_type_schema() ) + image_set.get_type_schema()->print_status( cout ); + else + cout << "<nn>" << flush; + cout << endl; + cout << " Number of entries.....: " << image_set.cardinality() << endl; + cout << " Element Type Schema...: " << flush; + if( image_set.get_element_type_schema() ) + image_set.get_element_type_schema()->print_status( cout ); + else + cout << "<nn>" << flush; + cout << endl << endl; + + iter = image_set.create_iterator(); + + int i; + for ( i=1, iter.reset(); iter.not_done(); iter++, i++ ) + { + cout << "Image " << i << endl; + image= *iter; + image->print_status( cout ); + cout << endl; + } + cout << endl; + + cout << "Committing transaction ... " << flush; + transaction.commit(); + cout << "OK" << endl; + + cout << "Closing database ... " << flush; + database.close(); + cout << "OK" << endl; + } + catch( r_Error& errorObj ) + { + cerr << errorObj.what() << endl; + return -1; + } + + return 0; +} + +/* + * end of query.cc + */ |