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Added comments on opening a database connection

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This commit is contained in:
Sébastien Rombauts 2012-10-31 10:10:49 +01:00
parent ab55e695af
commit a2446187fa
2 changed files with 14 additions and 12 deletions
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5
src/SQLiteC++/Database.cpp
View File

@ -14,12 +14,13 @@
namespace SQLite
{
// Open the provided database UTF-8 filename.
// Open the provided database UTF-8 filename with SQLITE_OPEN_xxx provided flags.
Database::Database(const char* apFilename, const int aFlags /*= SQLITE_OPEN_READONLY*/) : // throw(SQLite::Exception)
mpSQLite(NULL),
mFilename(apFilename)
{
// TODO SRombauts : add a :memory: mode, and a backup to/from :memory:
// TODO SRombauts : use the "zVfs" (last) parameter to give access to the ":memory:" VFS module
// TODO SRombauts : then add a backup mode to/from ":memory:"
int ret = sqlite3_open_v2(apFilename, &mpSQLite, aFlags, NULL);
if (SQLITE_OK != ret)
{

21
src/example1/main.cpp
View File

@ -23,8 +23,9 @@
class Example
{
public:
// Constructor
Example(void) :
mDb("example.db3"), // Open a database file
mDb("example.db3"), // Open a database file in readonly mode
mQuery(mDb, "SELECT * FROM test WHERE size > :min_size")// Compile a SQL query, containing one parameter (index 1)
{
}
@ -32,7 +33,7 @@ public:
{
}
// List the rows where the "size" column is greater than the provided aParamValue
/// List the rows where the "size" column is greater than the provided aParamValue
void ListGreaterThan (const int aParamValue)
{
std::cout << "ListGreaterThan (" << aParamValue << ")\n";
@ -51,8 +52,8 @@ public:
}
private:
SQLite::Database mDb;
SQLite::Statement mQuery;
SQLite::Database mDb; ///< Database connection
SQLite::Statement mQuery; ///< Database prepared SQL query
};
@ -61,8 +62,8 @@ int main (void)
// Basic example (1/5) :
try
{
// Open a database file
SQLite::Database db("example.db3");
// Open a database file in readonly mode
SQLite::Database db("example.db3"); // SQLITE_OPEN_READONLY
std::cout << "SQLite database file '" << db.getFilename().c_str() << "' opened successfully\n";
// Test if the 'test' table exists
@ -128,8 +129,8 @@ int main (void)
// The execAndGet wrapper example (3/5) :
try
{
// Open a database file
SQLite::Database db("example.db3");
// Open a database file in readonly mode
SQLite::Database db("example.db3"); // SQLITE_OPEN_READONLY
std::cout << "SQLite database file '" << db.getFilename().c_str() << "' opened successfully\n";
// WARNING: Be very careful with this dangerous method: you have to
@ -147,7 +148,7 @@ int main (void)
// Simple batch queries example (4/5) :
try
{
// Open a database file
// Open a database file in create/write mode
SQLite::Database db("test.db3", SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE);
std::cout << "SQLite database file '" << db.getFilename().c_str() << "' opened successfully\n";
@ -170,7 +171,7 @@ int main (void)
// RAII transaction example (5/5) :
try
{
// Open a database file
// Open a database file in create/write mode
SQLite::Database db("transaction.db3", SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE);
std::cout << "SQLite database file '" << db.getFilename().c_str() << "' opened successfully\n";