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Sourcecode: mysql-connector-c++ version File versions

connection_meta_schemaobj.cpp

/*
   Copyright 2007 - 2008 MySQL AB, 2008 - 2009 Sun Microsystems, Inc.  All rights reserved.

   The MySQL Connector/C++ is licensed under the terms of the GPL
   <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
   MySQL Connectors. There are special exceptions to the terms and
   conditions of the GPL as it is applied to this software, see the
   FLOSS License Exception
   <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
*/

/* *
* Basic example demonstrating connect and simple queries
*
*/


/* Standard C++ includes */
#include <stdlib.h>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <stdexcept>
#include <list>

/* Public interface of the MySQL Connector/C++ */
#include <driver/mysql_public_iface.h>
/* Connection parameter and sample data */
#include "examples.h"

using namespace std;

/**
* Usage example for Driver, Connection, (simple) Statement, ResultSet
*/
int main(int argc, const char **argv)
{

      string url(argc >= 2 ? argv[1] : EXAMPLE_HOST);
      const string user(argc >= 3 ? argv[2] : EXAMPLE_USER);
      const string pass(argc >= 4 ? argv[3] : EXAMPLE_PASS);
      const string database(argc >= 5 ? argv[4] : EXAMPLE_DB);

      static std::list<std::string> table_types;
      table_types.push_back("TABLE");

      unsigned int column, row;
      string ddl;

      cout << boolalpha;
      cout << "1..1" << endl;
      cout << "# Connector/C++ connection meta data example.." << endl;
      cout << "#" << endl;


      try {
            /* Using the Driver to create a connection */
            sql::Driver * driver = get_driver_instance();
            cout << "# " << driver->getName() << ", version ";
            cout << driver->getMajorVersion() << "." << driver->getMinorVersion();
                cout << "." << driver->getPatchVersion() << endl;

            std::auto_ptr< sql::Connection > con(driver->connect(url, user, pass));
            sql::DatabaseMetaData * con_meta = con->getMetaData();

            cout << "# CDBC (API) major version = " << con_meta->getCDBCMajorVersion() << endl;
            if (con_meta->getCDBCMajorVersion() <= 0) {
                  throw runtime_error("API major version must not be 0");
            }
            cout << "# CDBC (API) minor version = " << con_meta->getCDBCMinorVersion() << endl;

            {
                  /*
                  Which schemata/databases exist?
                  NOTE Connector C++ defines catalog = n/a, schema = MySQL database
                  */
                  cout << "# List of available schemata/databases: ";
                  std::auto_ptr< sql::ResultSet > res(con_meta->getSchemas());

                  /* just for fun... of course you can scroll and fetch in whatever order you want */
                  res->afterLast();
                  while (res->previous()) {
                        cout << res->getString("TABLE_SCHEM");
                        if (!res->isFirst()) {
                              cout << ", ";
                        }
                  }
                  cout << endl;
                  if (!res->isBeforeFirst() || res->isFirst())
                        throw runtime_error("Cursor should be positioned before first row");
            }

            {
                  /* What object types does getSchemaObjects support? */
                  cout << "# Supported Object types: ";
                  std::auto_ptr< sql::ResultSet > res(con_meta->getSchemaObjectTypes());
                  while (res->next()) {
                        cout << res->getString(1);
                        if (!res->isLast()) {
                              cout << ", ";
                        }
                  }
                  cout << endl;
                  if (!res->isAfterLast() || res->isLast())
                        throw runtime_error("Cursor should be positioned after last row");
            }


            std::auto_ptr< sql::Statement > stmt(con->createStatement());
            stmt->execute("USE " + database);
            stmt->execute("DROP TABLE IF EXISTS test1");
            stmt->execute("CREATE TABLE test1(id INT, label CHAR(1))");
            stmt->execute("DROP TABLE IF EXISTS test2");
            stmt->execute("CREATE TABLE test2(id INT, label CHAR(1))");

            /* "" = empty string requests all types of objects */
            std::auto_ptr< sql::ResultSet > res(con_meta->getSchemaObjects(con->getCatalog(), con->getSchema(), ""));
            row = 1;
            sql::ResultSetMetaData * res_meta = res->getMetaData();
            while (res->next()) {
                  if (row++ > 2)
                        break;

                  cout << "#\t Object " << res->getRow() << " (" << res->getString("OBJECT_TYPE") << ")" << endl;
                  if (res->getString(1) != res->getString("OBJECT_TYPE")) {
                        throw runtime_error("Fetch using numeric/non-numeric index failed for OBJECT_TYPE");
                  }
                  if (res->getString("OBJECT_TYPE").empty()) {
                        throw runtime_error("OBJECT_TYPE must not be empty");
                  }

                  cout << "#\t Catalog = " << res->getString("CATALOG");
                  cout << " (empty: " << res->getString("CATALOG").empty() << ")" << endl;
                  if (res->getString(2) != res->getString("CATALOG")) {
                        throw runtime_error("Fetch using numeric/non-numeric index failed for CATALOG");
                  }

                  cout << "#\t Schema = " << res->getString("SCHEMA");
                  cout << " (empty: " << res->getString("SCHEMA").empty() << ")" << endl;
                  if (res->getString(3) != res->getString("SCHEMA")) {
                        throw runtime_error("Fetch using numeric/non-numeric index failed for SCHEMA");
                  }

                  cout << "#\t Name = " << res->getString("NAME");
                  cout << " (empty: " << res->getString("NAME").empty() << ")" << endl;
                  if (res->getString(4) != res->getString("NAME")) {
                        throw runtime_error("Fetch using numeric/non-numeric index failed for NAME");
                  }

                  ddl = res->getString("DDL");
                  cout << "#\t DDL = " << setw(40);
                  cout << ddl.substr(0, ddl.find_first_of("\n", 1) - 1) << "..." << endl;
                  cout << "#\t DDL is empty: " << ddl.empty() << endl;
                  if (res->getString(5) != res->getString("DDL")) {
                        throw runtime_error("Fetch using numeric/non-numeric index failed for DDL");
                  }

            }
            cout << "#" << endl;
            cout << "#\t\t Using different getter methods at the example of the DDL column" << endl;
            cout << "#\t\t Column DDL is of type " << res_meta->getColumnTypeName(5);
            cout << " / Code: " << res_meta->getColumnType(5) << endl;
            /* scroll back to last row in set */
            res->previous();
            cout << "#\t\t DDL (as String) = " << setw(30) << ddl.substr(0, ddl.find_first_of("\n", 1) - 1) << "..." << endl;
            cout << "#\t\t DDL (as Boolean) = " << res->getBoolean("DDL") << "/" << res->getBoolean(5) << endl;
            cout << "#\t\t DDL (as Double) = " << res->getDouble("DDL") << "/" << res->getDouble(5) << endl;
            cout << "#\t\t DDL (as Int) = " << res->getInt("DDL") << "/" << res->getInt(5) << endl;
            cout << "#\t\t DDL (as Long) = " << res->getInt64("DDL") << "/" << res->getInt64(5) << endl;
            cout << "#" << endl;

            cout << "#\t\t Meta data on the result set at the example of the DDL column" << endl;
            cout << "#\t\t Column count = " << res_meta->getColumnCount() << " (Columns: ";
            for (column = 1; column <= res_meta->getColumnCount(); column++) {
                  cout << res_meta->getColumnName(column);
                  if (column < res_meta->getColumnCount()) {
                        cout << ", ";
                  }
            }
            cout << ")" << endl;

            cout << "#\t\t getCatalogName() = " << res_meta->getCatalogName(5) << endl;
            /* cout << "#\t\t getColumnDisplaySize() = " << res_meta->getDisplaySize("DDL") << endl; */
            cout << "#\t\t getColumnLabel() = " << res_meta->getColumnLabel(5) << endl;
            cout << "#\t\t getColumnName() = " << res_meta->getColumnName(5) << endl;
            if (res_meta->getColumnName(5) != res_meta->getColumnLabel(5)) {
                  throw runtime_error("column names differ for column DDL");
            }

            cout << "#\t\t getColumnType() = " << res_meta->getColumnType(5) << endl;
            cout << "#\t\t getColumnTypeName() " << res_meta->getColumnTypeName(5) << endl;
            /* cout << "#\t\t getPrecision() = " << res_meta->getPrecision(5) << endl; */
            cout << "#\t\t getSchemaName() = " << res_meta->getSchemaName(5) << endl;
            cout << "#\t\t getTableName() = " << res_meta->getTableName(5) << endl;
            cout << "#\t\t isAutoIncrement() = " << res_meta->isAutoIncrement(5) << endl;
            cout << "#\t\t isCaseSensitive() = " << res_meta->isCaseSensitive(5) << endl;
            cout << "#\t\t isCurrency() = " << res_meta->isCurrency(5) << endl;
            cout << "#\t\t isDefinitelyWritable() = " << res_meta->isDefinitelyWritable(5) << endl;
            cout << "#\t\t isNullable() = " << res_meta->isNullable(5) << endl;
            cout << "#\t\t isReadOnly() = " << res_meta->isReadOnly(5) << endl;
            cout << "#\t\t isSearchable() = " << res_meta->isSearchable(5) << endl;
            cout << "#\t\t isSigned() = " << res_meta->isSigned(5) << endl;
            cout << "#\t\t isWritable() = " << res_meta->isWritable(5) << endl;

            std::auto_ptr< sql::ResultSet > res_tables(con_meta->getTables(con->getCatalog(), database, "t%", table_types));
            sql::ResultSetMetaData * res_meta_tables = res_tables->getMetaData();

            cout << "#" << endl;
            cout << "# Tables with names like 't%':" << endl;;
            cout << "#\t rowsCount() = " << res_tables->rowsCount() << endl;
            cout << "#\t getColumnCount() = " << res_meta_tables->getColumnCount() << endl;
            cout << "#\t" << endl;
            while (res_tables->next()) {
                  cout << "#\t ";
                  for (column = 1; column < res_meta_tables->getColumnCount(); column++) {
                        cout << "'" << res_tables->getString(column) << "' ";
                  }
                  cout <<  endl;
            }
            cout << "#" << endl;

            res_tables->first();
            std::auto_ptr< sql::ResultSet > res_columns(con_meta->getColumns(con->getCatalog(), database, "test1", "%"));

            cout << "#" << "Columns in the table 'test1'..." << endl;
            cout << "#\t rowsCount() = " << res_columns->rowsCount() << endl;
            if (res_columns->rowsCount() != 2)
                  throw runtime_error("Table test1 has two columns, no more!");

            while (res_columns->next()) {
                  cout << "#\t Column name = '" << res_columns->getString("COLUMN_NAME") << "'" << endl;
            }
            cout << "#" << endl;

            cout << "# done!" << endl;
            cout << "ok 1 - examples/connection_meta_schemaobj.cpp" << endl;

      } catch (sql::SQLException &e) {
            /*
            The MySQL Connector/C++ throws three different exceptions:

            - sql::MethodNotImplementedException (derived from sql::SQLException)
            - sql::InvalidArgumentException (derived from sql::SQLException)
            - sql::SQLException (derived from std::runtime_error)
            */
            cout << "# ERR: SQLException in " << __FILE__;
            cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
            /* Use what() (derived from std::runtime_error) */
            cout << "# ERR: " << e.what();
            cout << " (MySQL error code: " << e.getErrorCode();
            cout << ", SQLState: " << e.getSQLState() << " )" << endl;
            cout << "not ok 1 - examples/connection_meta_schemaobj.cpp" << endl;

            return EXIT_FAILURE;
      } catch (std::runtime_error &e) {

            cout << "# ERR: runtime_error in " << __FILE__;
            cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
            cout << "# ERR: " << e.what() << endl;
            cout << "not ok 1 - examples/connection_meta_schemaobj.cpp" << endl;

            return EXIT_FAILURE;
      }

      return EXIT_SUCCESS;
}

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