8d0c06c897
This PR defines order_key and having_key binding priority.
1. order key priority
```
select
col1 * -1 as col1 # inner_col1 * -1 as alias_col1
from
t
order by col1; # order by order_col1
```
to bind `order_col1`, `alias_col1` has higher priority than `inner_col1`
2. having key priority
```
select (a-1) as a # inner_a - 1 as alias_a
from bind_priority_tbl
group by a
having a=1;
```
to bind having key, `inner_a` has higher priority than `alias_a`
3. group by key binding priority
```
SELECT date_format(b.k10,
'%Y%m%d') AS k10
FROM test a
LEFT JOIN
(SELECT k10
FROM baseall) b
ON a.k10 = b.k10
GROUP BY k10;
```
group_by_key (k10) binding priority:
- agg.child.output
- agg.output
if binding with agg.child.output failed(the slot not found, or more than one candidate slot found in agg.child.output), nereids try to bind group_by_key with agg.output.
In above example, nereids found 2 candidate slots (a.k10, b.k10) in agg.child.output for group_by_key (k10), binding with agg.child.output failed. Then nereids try to bind group_by_key with agg.output, that is `date_format(b.k10, '%Y%m%d') AS k10`. and finally, group_by_key is bound with `alias k10`
14 lines
164 B
Plaintext
14 lines
164 B
Plaintext
-- This file is automatically generated. You should know what you did if you want to edit this
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-3
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a 1
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all 1
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all 2
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0
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