internal SQLiteStatement GetStatement(int index)
{
// Haven't built any statements yet
if (_statementList == null)
{
return(BuildNextCommand());
}
// If we're at the last built statement and want the next unbuilt statement, then build it
if (index == _statementList.Count)
{
if (String.IsNullOrEmpty(_remainingText) == false)
{
return(BuildNextCommand());
}
else
{
return(null); // No more commands
}
}
SQLiteStatement stmt = _statementList[index];
stmt.BindParameters();
return(stmt);
}
/// <summary>
/// Builds an array of prepared statements for each complete SQL statement in the command text
/// </summary>
internal SQLiteStatement BuildNextCommand()
{
SQLiteStatement stmt = null;
try
{
if ((_cnn != null) && (_cnn._sql != null))
{
if (_statementList == null)
{
_remainingText = _commandText;
}
stmt = _cnn._sql.Prepare(_cnn, _remainingText, (_statementList == null) ? null : _statementList[_statementList.Count - 1], (uint)(_commandTimeout * 1000), out _remainingText);
if (stmt != null)
{
stmt._command = this;
if (_statementList == null)
{
_statementList = new List <SQLiteStatement>();
}
_statementList.Add(stmt);
_parameterCollection.MapParameters(stmt);
stmt.BindParameters();
}
}
return(stmt);
}
catch (Exception)
{
if (stmt != null)
{
if ((_statementList != null) && _statementList.Contains(stmt))
{
_statementList.Remove(stmt);
}
stmt.Dispose();
}
// If we threw an error compiling the statement, we cannot continue on so set the remaining text to null.
_remainingText = null;
throw;
}
}
internal override SQLiteErrorCode Reset(SQLiteStatement stmt)
{
SQLiteErrorCode n;
#if !SQLITE_STANDARD
n = UnsafeNativeMethods.sqlite3_reset_interop(stmt._sqlite_stmt);
#else
n = UnsafeNativeMethods.sqlite3_reset(stmt._sqlite_stmt);
#endif
// If the schema changed, try and re-prepare it
if (n == SQLiteErrorCode.Schema)
{
// Recreate a dummy statement
string str;
using (SQLiteStatement tmp = Prepare(null, stmt._sqlStatement, null, (uint)(stmt._command._commandTimeout * 1000), out str))
{
// Finalize the existing statement
stmt._sqlite_stmt.Dispose();
// Reassign a new statement pointer to the old statement and clear the temporary one
stmt._sqlite_stmt = tmp._sqlite_stmt;
tmp._sqlite_stmt = null;
// Reapply parameters
stmt.BindParameters();
}
return SQLiteErrorCode.Unknown; // Reset was OK, with schema change
}
else if (n == SQLiteErrorCode.Locked || n == SQLiteErrorCode.Busy)
return n;
if (n != SQLiteErrorCode.Ok)
throw new SQLiteException(n, GetLastError());
return n; // We reset OK, no schema changes
}