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feat(query): add markov model function and feistel function for obfuscator #17437
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benchmark: select count(*) from lineitem; // 600037902
create or replace table lineitem_model as select markov_train(l_comment) as l_comment from lineitem; // finished in 553 seconds
select data_size from system.tables where name = 'lineitem_model'; // 416277
select
lineitem.l_comment,
markov_generate(lineitem_model.l_comment,'{"order":5,"sliding_window_size":8}',0,lineitem.l_comment) g
from (select l_comment from lineitem limit 10) lineitem, lineitem_model;
┌─────────────────────────────────────────────────────────────────────────────────────────────────┐
│ l_comment │ g │
│ String │ Nullable(String) │
├─────────────────────────────────────────────┼───────────────────────────────────────────────────┤
│ lar sheaves! sly asymptot │ aggle slyly final, bold pinto │
│ final pinto beans doze against the final, s │ fluffy the blithely unusual foxes. blithely │
│ xpress theodolites. closely final t │ s. fluffily even platelets. fluffily │
│ haggle quickly. even theodolites wake caref │ encies! theodolites. depths wake. ironic dolphins │
│ . silent pinto bea │ nts. regular patterns │
│ uriously express │ c accounts cajole │
│ e of the carefully unusu │ usly along the fluffily ironic │
│ realms. express instructions are beyond th │ s. furiously express solve. pending to beans │
│ ckly alongside of the final m │ gside of the unusual pinto beans │
│ y even ideas │ sleep. furiousl │
└─────────────────────────────────────────────────────────────────────────────────────────────────┘ |
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Summary
Migrate the obfuscator tool from ClickHouse
usage example: 02_0000_function_markov.test
Tests
Type of change
This change is![Reviewable](https://camo.githubusercontent.com/1541c4039185914e83657d3683ec25920c672c6c5c7ab4240ee7bff601adec0b/68747470733a2f2f72657669657761626c652e696f2f7265766965775f627574746f6e2e737667)