FearfulTomcat27 opened a new pull request, #209:
URL: https://github.com/apache/tsfile/pull/209
# Description
## Changes in this PR
1. This PR adds short-circuit evaluation, which drastically reduces query
time for queries with multiple conditions.
2. This PR uses FreeMarker to generate Filter code for a variety of
different data types, reducing the time-consuming repetitive type conversions.
3. Add UT to the newly generated Filter
## Optimization Rate
### Short-circuit evalutaion Optimization Rate
Assume that the condition **A and B** OR **A or B** exists.
Let the pre-optimization query time be $t_{1}$ ,the post-optimization query
time be $t_{2}$, and the optimization rate be $\eta$
Optimization rate formula: $\eta = \frac{t_{1}-t_{2}}{t_2} \times 100\%$
A Conditional selection rate | And Optimization rate | Or Optimization rate
-- | -- | --
100% | -2.996% | 1349.588%
80% | 18.337% | 222.466%
60% | 48.962% | 115.850%
40% | 101.519% | 44.693%
20% | 221.260% | 17.133
0% | 1644.018% | -1.215%
### FreeMarker Optimization Rate
Data Type | Optimization Rate
-- | --
boolean | 3.814%
Int | 5.577%
long | 4.854%
float | 5.483%
double | 5.789%
Binary | -0.259%
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