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package lesci
import (
"context"
"database/sql"
"database/sql/driver"
"fmt"
"go.jknobloc.com/x/llm"
"go.jknobloc.com/x/tensor"
"go.jknobloc.com/x/tokenizer/bpe"
)
func (e *Experiment) ExtractData(db *sql.DB) error {
if ok, err := EnsureTable(db, "oov_rules", `CREATE TABLE oov_rules (a INTEGER, b INTEGER, c INTEGER)`); err != nil {
return err
} else if !ok {
fmt.Println("oov_rules table not empty")
if !e.options.ForceExtract {
fmt.Println("skipping rule extraction")
return nil
}
fmt.Println("clearing oov_rules")
if _, err := db.ExecContext(context.Background(), `DELETE FROM oov_rules`); err != nil {
return err
}
}
merges := bpe.Merges(e.counterfactual.(*bpe.Tokenizer))
rules, valid := Rules(e.counterfactual, merges)
mask := ExtractData(rules, valid, int64(e.cutoff), int64(e.window), e.config.ClampRulesBeforeFilter)
return AppendRows(db, "oov_rules", func(append AppendFunc) error {
for i, m := range mask {
if !m {
continue
}
if err := append([]driver.Value{
rules.At([]int{i, 0}),
rules.At([]int{i, 1}),
rules.At([]int{i, 2}),
}); err != nil {
return err
}
}
return nil
})
}
func Rules(tokenizer llm.Tokenizer, merges [][2]string) (tensor.Dense[int64], []bool) {
valid := bpe.ReachableMerges(tokenizer.(*bpe.Tokenizer), merges)
rules := tensor.NewDense[int64]([]int{len(merges), 3}, nil)
atoi := bpe.Atoi(tokenizer.(*bpe.Tokenizer))
for i, merge := range merges {
if !valid[i] {
continue
}
a, x := atoi[merge[0]]
b, y := atoi[merge[1]]
c, z := atoi[merge[0]+merge[1]]
if !x || !y || !z {
panic("unknown token")
}
rules.Set([]int{i, 0}, int64(a))
rules.Set([]int{i, 1}, int64(b))
rules.Set([]int{i, 2}, int64(c))
}
return rules, valid
}
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