www.pudn.com > CppSQLite_3_1_demo_and_src.zip > CppSQLite3DemoExt.cpp
//////////////////////////////////////////////////////////////////////////////// // CppSQLite3 - A C++ wrapper around the SQLite3 embedded database library. // // Copyright (c) 2004 Rob Groves. All Rights Reserved. rob.groves@btinternet.com // // Permission to use, copy, modify, and distribute this software and its // documentation for any purpose, without fee, and without a written // agreement, is hereby granted, provided that the above copyright notice, // this paragraph and the following two paragraphs appear in all copies, // modifications, and distributions. // // IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT, // INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST // PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, // EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // // THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A // PARTICULAR PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF // ANY, PROVIDED HEREUNDER IS PROVIDED "AS IS". THE AUTHOR HAS NO OBLIGATION // TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. // // V3.0 03/08/2004 -Initial Version for sqlite3 //////////////////////////////////////////////////////////////////////////////// #include "CppSQLite3.h" #include#include using namespace std; const char* gszFile = "C:\\test.db"; int main(int argc, char** argv) { try { int row; CppSQLite3DB db; cout << "SQLite Version: " << db.SQLiteVersion() << endl; remove(gszFile); db.open(gszFile); //////////////////////////////////////////////////////////////////////////////// // Demonstrate getStringField(), getIntField(), getFloatField() //////////////////////////////////////////////////////////////////////////////// db.execDML("create table parts(no int, name char(20), qty int, cost number);"); db.execDML("insert into parts values(1, 'part1', 100, 1.11);"); db.execDML("insert into parts values(2, null, 200, 2.22);"); db.execDML("insert into parts values(3, 'part3', null, 3.33);"); db.execDML("insert into parts values(4, 'part4', 400, null);"); cout << endl << "CppSQLite3Query getStringField(), getIntField(), getFloatField() tests" << endl; CppSQLite3Query q = db.execQuery("select * from parts;"); while (!q.eof()) { cout << q.getIntField(0) << "|"; cout << q.getStringField(1) << "|"; cout << q.getIntField(2) << "|"; cout << q.getFloatField(3) << "|" << endl; q.nextRow(); } cout << endl << "specify NULL values tests" << endl; q = db.execQuery("select * from parts;"); while (!q.eof()) { cout << q.getIntField(0) << "|"; cout << q.getStringField(1, "NULL") << "|"; cout << q.getIntField(2, -1) << "|"; cout << q.getFloatField(3, -3.33) << "|" << endl; q.nextRow(); } cout << endl << "Specify fields by name" << endl; q = db.execQuery("select * from parts;"); while (!q.eof()) { cout << q.getIntField("no") << "|"; cout << q.getStringField("name") << "|"; cout << q.getIntField("qty") << "|"; cout << q.getFloatField("cost") << "|" << endl; q.nextRow(); } cout << endl << "specify NULL values tests" << endl; q = db.execQuery("select * from parts;"); while (!q.eof()) { cout << q.getIntField("no") << "|"; cout << q.getStringField("name", "NULL") << "|"; cout << q.getIntField("qty", -1) << "|"; cout << q.getFloatField("cost", -3.33) << "|" << endl; q.nextRow(); } q.finalize(); //////////////////////////////////////////////////////////////////////////////// // Demonstrate getStringField(), getIntField(), getFloatField() // But this time on CppSQLite3Table //////////////////////////////////////////////////////////////////////////////// cout << endl << "CppSQLite3Table getStringField(), getIntField(), getFloatField() tests" << endl; CppSQLite3Table t = db.getTable("select * from parts;"); for (row = 0; row < t.numRows(); row++) { t.setRow(row); cout << t.getIntField(0) << "|"; cout << t.getStringField(1) << "|"; cout << t.getIntField(2) << "|"; cout << t.getFloatField(3) << "|" << endl; } cout << endl << "specify NULL values tests" << endl; for (row = 0; row < t.numRows(); row++) { t.setRow(row); cout << t.getIntField(0, -1) << "|"; cout << t.getStringField(1, "NULL") << "|"; cout << t.getIntField(2, -1) << "|"; cout << t.getFloatField(3, -3.33) << "|" << endl; } cout << endl << "Specify fields by name" << endl; for (row = 0; row < t.numRows(); row++) { t.setRow(row); cout << t.getIntField("no") << "|"; cout << t.getStringField("name") << "|"; cout << t.getIntField("qty") << "|"; cout << t.getFloatField("cost") << "|" << endl; } cout << endl << "specify NULL values tests" << endl; for (row = 0; row < t.numRows(); row++) { t.setRow(row); cout << t.getIntField("no") << "|"; cout << t.getStringField("name", "NULL") << "|"; cout << t.getIntField("qty", -1) << "|"; cout << t.getFloatField("cost", -3.33) << "|" << endl; } //////////////////////////////////////////////////////////////////////////////// // Demonstrate multi-statement DML // Note that number of rows affected is only from the last statement // when multiple statements are used //////////////////////////////////////////////////////////////////////////////// cout << endl << "Multi-Statement execDML()" << endl; const char* szDML = "insert into parts values(5, 'part5', 500, 5.55);" "insert into parts values(6, 'part6', 600, 6.66);" "insert into parts values(7, 'part7', 700, 7.77);"; int nRows = db.execDML(szDML); cout << endl << nRows << " rows affected" << endl; cout << db.execScalar("select count(*) from parts;") << " rows in parts table" << endl; szDML = "delete from parts where no = 2;" "delete from parts where no = 3;"; nRows = db.execDML(szDML); cout << endl << nRows << " rows affected" << endl; cout << db.execScalar("select count(*) from parts;") << " rows in parts table" << endl; //////////////////////////////////////////////////////////////////////////////// // Demonstrate new typing system & BLOBS // ANy data can be stored in any column //////////////////////////////////////////////////////////////////////////////// cout << endl << "Data types and BLOBs()" << endl; db.execDML("create table types(no int, " "name char(20), qty float, dat blob);"); db.execDML("insert into types values(null, null, null, null);"); db.execDML("insert into types values(1, 2, 3, 4);"); db.execDML("insert into types values(1.1, 2.2, 3.3, 4.4);"); db.execDML("insert into types values('a', 'b', 'c', 'd');"); CppSQLite3Statement stmt = db.compileStatement("insert into types values(?,?,?,?);"); unsigned char buf[256]; memset(buf, 1, 1); stmt.bind(1, buf, 1); memset(buf, 2, 2); stmt.bind(2, buf, 2); memset(buf, 3, 3); stmt.bind(3, buf, 3); memset(buf, 4, 4); stmt.bind(4, buf, 4); stmt.execDML(); cout << db.execScalar("select count(*) from types;") << " rows in types table" << endl; q = db.execQuery("select * from types;"); while (!q.eof()) { for (int i = 0; i < q.numFields(); i++) { switch (q.fieldDataType(i)) { case SQLITE_INTEGER : cout << "SQLITE_INTEGER|"; break; case SQLITE_FLOAT : cout << "SQLITE_FLOAT |"; break; case SQLITE_TEXT : cout << "SQLITE_TEXT |"; break; case SQLITE_BLOB : cout << "SQLITE_BLOB |"; break; case SQLITE_NULL : cout << "SQLITE_NULL |"; break; default: cout << "***UNKNOWN TYPE***"; break; } } q.nextRow(); cout << endl; } nRows = db.execDML("delete from types where no = 1 or no = 1.1 or no = 'a' or no is null;"); cout << endl << nRows << " rows deleted, leaving binary row only" << endl; q = db.execQuery("select * from types;"); const unsigned char* pBlob; int nLen; pBlob = q.getBlobField(0, nLen); cout << "Field 1 BLOB length: " << nLen << endl; pBlob = q.getBlobField(1, nLen); cout << "Field 2 BLOB length: " << nLen << endl; pBlob = q.getBlobField(2, nLen); cout << "Field 3 BLOB length: " << nLen << endl; pBlob = q.getBlobField(3, nLen); cout << "Field 4 BLOB length: " << nLen << endl; q.finalize(); nRows = db.execDML("delete from types;"); cout << endl << nRows << " rows deleted, leaving empty table" << endl; unsigned char bin[256]; for (int i = 0; i < sizeof bin; i++) { bin[i] = i; } stmt = db.compileStatement("insert into types values(?,0,0,0);"); stmt.bind(1, bin, sizeof bin); stmt.execDML(); cout << "Stored binary Length: " << sizeof bin << endl; q = db.execQuery("select * from types;"); pBlob = q.getBlobField(0, nLen); cout << "Field 1 BLOB length: " << nLen << endl; for (i = 0; i < sizeof bin; i++) { if (pBlob[i] != i) { cout << "Problem: i: ," << i << " BLOB[i]: " << pBlob[i] << endl; } } } catch (CppSQLite3Exception& e) { cerr << e.errorCode() << ":" << e.errorMessage() << endl; } //////////////////////////////////////////////////////////////////////////////// // Loop until user enters q or Q //////////////////////////////////////////////////////////////////////////////// char c(' '); while (c != 'q' && c != 'Q') { cout << "Press q then enter to quit: "; cin >> c; } return 0; }