func (c *Conn) setAutoCommitAttr(a uintptr) error {
ret := api.SQLSetConnectAttr(c.h, api.SQL_ATTR_AUTOCOMMIT,
api.SQLPOINTER(a), api.SQL_IS_UINTEGER)
if IsError(ret) {
return NewError("SQLSetConnectAttr", c.h)
}
return nil
}
func initDriver() error {
//Allocate environment handle
var out api.SQLHANDLE
in := api.SQLHANDLE(api.SQL_NULL_HANDLE)
ret := api.SQLAllocHandle(api.SQL_HANDLE_ENV, in, &out)
if IsError(ret) {
return NewError("SQLAllocHandle", api.SQLHENV(in))
}
drv.h = api.SQLHENV(out)
drv.Stats.updateHandleCount(api.SQL_HANDLE_ENV, 1)
// will use ODBC v3
ret = api.SQLSetEnvAttr(drv.h, api.SQL_ATTR_ODBC_VERSION,
api.SQLPOINTER(api.SQL_OV_ODBC3), 0)
if IsError(ret) {
defer releaseHandle(drv.h)
return NewError("SQLSetEnvAttr", drv.h)
}
//TODO: find a way to make this attribute changeable at runtime
//Enable connection pooling
ret = api.SQLSetEnvAttr(drv.h, api.SQL_ATTR_CONNECTION_POOLING, api.SQLPOINTER(api.SQL_CP_ONE_PER_HENV), api.SQL_IS_UINTEGER)
if IsError(ret) {
defer releaseHandle(drv.h)
return NewError("SQLSetEnvAttr", drv.h)
}
//Set relaxed connection pool matching
ret = api.SQLSetEnvAttr(drv.h, api.SQL_ATTR_CP_MATCH, api.SQLPOINTER(api.SQL_CP_RELAXED_MATCH), api.SQL_IS_UINTEGER)
if IsError(ret) {
defer releaseHandle(drv.h)
return NewError("SQLSetEnvAttr", drv.h)
}
//TODO: it would be nice if we could call "drv.SetMaxIdleConns(0)" here but from the docs it looks like
//the user must call this function after db.Open
return nil
}
func (l *BufferLen) Bind(h api.SQLHSTMT, idx int, ctype api.SQLSMALLINT, buf []byte) api.SQLRETURN {
return api.SQLBindCol(h, api.SQLUSMALLINT(idx+1), ctype,
api.SQLPOINTER(unsafe.Pointer(&buf[0])), api.SQLLEN(len(buf)),
(*api.SQLLEN)(l))
}