func (e *Evaluator) handleBitOp(o *ast.BinaryOperationExpr) bool {
a, b, err := types.CoerceDatum(e.sc, *o.L.GetDatum(), *o.R.GetDatum())
if err != nil {
e.err = errors.Trace(err)
return false
}
if a.IsNull() || b.IsNull() {
o.SetNull()
return true
}
x, err := a.ToInt64(e.sc)
if err != nil {
e.err = errors.Trace(err)
return false
}
y, err := b.ToInt64(e.sc)
if err != nil {
e.err = errors.Trace(err)
return false
}
// use a int64 for bit operator, return uint64
switch o.Op {
case opcode.And:
o.SetUint64(uint64(x & y))
case opcode.Or:
o.SetUint64(uint64(x | y))
case opcode.Xor:
o.SetUint64(uint64(x ^ y))
case opcode.RightShift:
o.SetUint64(uint64(x) >> uint64(y))
case opcode.LeftShift:
o.SetUint64(uint64(x) << uint64(y))
default:
e.err = ErrInvalidOperation.Gen("invalid op %v in bit operation", o.Op)
return false
}
return true
}
