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feat: implement LOAD_FILE and AI_SPLIT_DOCUMENT#1081

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feat: implement LOAD_FILE and AI_SPLIT_DOCUMENT#1081
StarAstronaut2 wants to merge 3 commits into
oceanbase:vldb_2026from
StarAstronaut2:vldb_lzr

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@LINxiansheng

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Document AI & IK Custom Dictionary Score

Document AI Functions Score
===========================
score: 100.00 / 100
load_file: 50 / 50
ai_split_document: 50 / 50

IK Custom Dictionary Score
==========================
score: 0.00 / 100
ik_custom_dict: 0 / 100

FTS Large Benchmark Score

FTS Large Benchmark Score
=========================
score: 1.61 / 100
mean_improvement: 0.80%
full_score_improvement: 50.00%

build_improvement: 0.62%
  build_ik_all_sec: baseline=35.2836, current=34.727, improvement=1.58%
  build_ik_content_sec: baseline=28.3764, current=28.079, improvement=1.05%
  build_beng_en_sec: baseline=14.7578, current=14.871, improvement=-0.77%
tokenize_improvement: 0.96%
  tokenize_ik_avg_ms: baseline=0.76478, current=0.7565, improvement=1.08%
  tokenize_beng_avg_ms: baseline=0.42262, current=0.4191, improvement=0.83%
query_improvement: 0.83%
  query_cn_avg_ms: baseline=16.6628, current=16.5287, improvement=0.80%
  query_beng_avg_ms: baseline=24.3042, current=24.0448, improvement=1.07%
  query_mixed_avg_ms: baseline=17.5593, current=17.3616, improvement=1.13%
  query_limit_avg_ms: baseline=16.2334, current=16.1785, improvement=0.34%

FTS Large Benchmark Report

========================================
FTS Large Benchmark Report
========================================
timestamp:              2026-07-15 15:19:08
label:                  vldb-ci-29425846468-1
git_head:               f4df3b2
git_dirty:              0
rows:                   20000
batch:                  500
rounds:                 3000
query_rounds:           200
samples:                3
warmup:                 30
skip_load:              0
----------------------------------------
select1_avg_ms:         0.2046
select1_stdev_ms:       0.0008
raw_load_sec:           1.529
raw_load_rows_per_sec:  13080.4
build_ik_all_sec:       34.727
build_ik_content_sec:   28.079
build_beng_en_sec:      14.871
build_total_sec:        77.694
----------------------------------------
tokenize_ik_avg_ms:     0.7565
tokenize_ik_median_ms:  0.7562
tokenize_ik_stdev_ms:   0.0041
tokenize_beng_avg_ms:   0.4191
tokenize_beng_median_ms:0.4172
tokenize_beng_stdev_ms: 0.0059
----------------------------------------
query_cn_hits:          8001
query_cn_avg_ms:        16.5287
query_cn_stdev_ms:      0.0279
query_beng_hits:        11000
query_beng_avg_ms:      24.0448
query_beng_stdev_ms:    0.0195
query_mixed_hits:       7332
query_mixed_avg_ms:     17.3616
query_mixed_stdev_ms:   0.0123
query_limit_hits:       20
query_limit_avg_ms:     16.1785
query_limit_stdev_ms:   0.0208
========================================

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