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coprocessor, dag: support decode Time from tipb.Expr #2199

merged 43 commits into from Aug 28, 2017
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Just for now



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hicqu committed Aug 17, 2017
commit 447e3119f3bed956f8486f713c2606af9048da93
@@ -0,0 +1,43 @@
// Copyright 2017 PingCAP, Inc.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
use std::{i64, f64};
use coprocessor::codec::{datum, mysql, Datum};
use super::{FnCall, Result, StatementContext};
impl FnCall {
pub fn plus_real(&self, ctx: &StatementContext, row: &[Datum]) -> Result<Option<f64>> {
let lhs = try!(self.children[0].eval_real(ctx, row));
let rhs = try!(self.children[1].eval_real(ctx, row));
do_plus(lhs, rhs, |l, r| {
let res = l + r;
if !res.is_finite() {
return Err(Error::Other("overflow"));
pub fn plus_decimal<'a, 'b: 'a>(&'b self, ctx: &StatementContext, row: &'a [Datum]) -> Result<Option<Cow<'a, Decimal>>> {
pub fn plus_int(&self, ctx: &StatementContext, row: &[Datum]) -> Result<Option<i64>> {
fn do_plus<T, F>(lhs: Option<T>, rhs: Option<T>, plus: F) -> Result<Option<T>>
F: Fn(T, T) -> Result<Option<T>>
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