File size: 2,223 Bytes
4968ea3 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | """Rewrite query validation via BM25 retrieval rank comparison."""
from src.retrieval.bm25_retriever import BM25Retriever
from src.utils import setup_logger
logger = setup_logger(__name__)
def validate_rewrite(
original_query: str,
rewrite_query: str,
ms_label: str,
retriever: BM25Retriever,
gold_evidence_ids: set,
top_k: int = 10,
) -> dict:
"""Validate a rewrite_query by comparing retrieval performance.
Args:
original_query: Original user query.
rewrite_query: Generated rewrite query.
ms_label: Memory state label.
retriever: BM25 retriever for this user.
gold_evidence_ids: Set of gold evidence session IDs.
top_k: Top-k for recall computation.
Returns:
Validation result dict.
"""
if ms_label == "SM":
return {"status": "skip", "reason": "SM does not use retrieval"}
if ms_label == "NM" or rewrite_query == original_query:
return {"status": "keep", "reason": "NM uses original query"}
# Compute ranks
base_rank = retriever.get_rank(original_query, gold_evidence_ids)
new_rank = retriever.get_rank(rewrite_query, gold_evidence_ids)
# Compute recall@k
base_recall = retriever.recall_at_k(original_query, gold_evidence_ids, k=top_k)
new_recall = retriever.recall_at_k(rewrite_query, gold_evidence_ids, k=top_k)
validation_result = {
"base_rank": base_rank,
"new_rank": new_rank,
"base_recall_at_k": base_recall,
"new_recall_at_k": new_recall,
"rank_improved": new_rank < base_rank,
"rank_not_worse": new_rank <= base_rank,
}
# Decision based on ms_label
if ms_label == "PM":
if new_recall and new_rank <= base_rank:
validation_result["status"] = "keep"
elif new_recall and new_rank > base_rank:
validation_result["status"] = "keep_downweight"
else:
validation_result["status"] = "discard"
elif ms_label == "VM":
if new_recall:
validation_result["status"] = "keep"
else:
validation_result["status"] = "discard"
else:
validation_result["status"] = "keep"
return validation_result
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