public BindVarStatement(MySQLConnection connection, string query, MySQLParameterCollection parameterCollection, uint?fetchSize, CursorType cursorType)
{
Stmt = connection.NativeConnection.CreateStatement();
if (fetchSize != null)
{
var ptr = Marshal.AllocHGlobal(Marshal.SizeOf(fetchSize.Value));
Marshal.StructureToPtr(fetchSize.Value, ptr, false);
var code1 = Stmt.mysql_stmt_attr_set(StmtAttrTypes.STMT_ATTR_PREFETCH_ROWS, ptr);
Marshal.FreeHGlobal(ptr);
if (code1 != 0)
{
throw new MySqlException(Stmt);
}
}
if (cursorType != CursorType.NoCursor)
{
var value = (enum_cursor_type)cursorType;
var ptr = Marshal.AllocHGlobal(Marshal.SizeOf(value));
Marshal.StructureToPtr(value, ptr, false);
var code1 = Stmt.mysql_stmt_attr_set(StmtAttrTypes.STMT_ATTR_CURSOR_TYPE, ptr);
Marshal.FreeHGlobal(ptr);
if (code1 != 0)
{
throw new MySqlException(Stmt);
}
}
// execute prepare to call mysql_stmt_param_count
if (Stmt.mysql_stmt_prepare(query, query.Length) != 0)
{
throw new MySqlException(Stmt);
}
// This function will not deliver a valid result until mysql_stmt_prepare() was called.
var paramCount = (int)Stmt.mysql_stmt_param_count();
if (paramCount != parameterCollection.Count)
{
throw new MySqlException($"Invalid parameters, stmt parameters:{paramCount} parameters count:{parameterCollection.Count}");
}
// alloc & set binds
_bindParams = new MYSQL_BIND[parameterCollection.Count];
for (var i = 0; i < parameterCollection.Count; i++)
{
_bindParams[i] = new MYSQL_BIND();
var param = parameterCollection[i];
var bindInput = param.GetBindInput();
if (bindInput != null)
{
_bindParams[i].buffer_type = bindInput.BufferType;
if (bindInput.Buffer == null)
{
_bindParams[i].ResetBuffer();
}
else
{
_bindParams[i].SetBuffer(bindInput.Buffer);
}
if (bindInput.IsNull.HasValue)
{
_bindParams[i].SetIsNull(bindInput.IsNull.Value);
}
else
{
_bindParams[i].ResetIsNull();
}
if (bindInput.Length.HasValue)
{
_bindParams[i].SetLength((uint)bindInput.Length.Value);
}
else
{
_bindParams[i].ResetLength();
}
_bindParams[i].is_unsigned = (byte)(bindInput.IsUnsigned ? 1 : 0);
}
else
{
throw new NotSupportedException();
}
}
// link binds to stmt
if (Stmt.mysql_stmt_bind_param(_bindParams) != 0)
{
throw new MySqlException(Stmt);
}
}
