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import logging
import os
from tqdm import tqdm
import json
from dataclasses import dataclass
from transformers.tokenization_bart import BartTokenizer
from transformers.tokenization_roberta import RobertaTokenizer
from transformers.tokenization_utils import PreTrainedTokenizer
from relogic.pretrainkit.datasets.utils import pad_and_tensorize_sequence
from torch.utils.data.dataset import Dataset
import random
logger = logging.getLogger(__name__)
class Entity2QueryDataset(Dataset):
"""
Dataset for training task: SQL (+ schema) -> text
"""
def __init__(self, tokenizer: PreTrainedTokenizer, file_path, block_size, local_rank=-1):
assert os.path.isfile(file_path)
logger.info("Creating features from dataset file at {}".format(file_path))
self.examples = []
total, valid = 0, 0
add_prefix_space = isinstance(tokenizer, BartTokenizer) or isinstance(tokenizer, RobertaTokenizer)
with open(file_path, encoding="utf-8") as f:
for line in tqdm(f):
total += 1
example = json.loads(line)
control_code = example["control_code"]
entities = example["entities"]
if len(entities) == 1 and "*" in entities:
continue
text = example["question"].strip()
text_tokens = [tokenizer.cls_token] + tokenizer.tokenize(text, add_prefix_space=add_prefix_space) + [tokenizer.sep_token]
text_token_ids = tokenizer.convert_tokens_to_ids(text_tokens)
self.examples.append({
"control_code": control_code,
"entities": entities,
"text_token_ids": text_token_ids})
logger.info("Total {} examples.".format(total))
def __len__(self):
return len(self.examples)
def __getitem__(self, i):
return self.examples[i]
@dataclass
class DataCollatorForEntity2Query:
"""
"""
tokenizer: PreTrainedTokenizer
def __post_init__(self):
self.label_bos_id = self.tokenizer.cls_token_id
self.label_eos_id = self.tokenizer.sep_token_id
def collate_batch(self, examples):
text_ids_sequences = [example["text_token_ids"] for example in examples]
padded_text_ids_tensor = pad_and_tensorize_sequence(
text_ids_sequences, padding_value=self.tokenizer.pad_token_id)
entity_token_ids_sequences = []
for example in examples:
entity_sequence = []
entity_tokens = []
if len(example["control_code"]) == 0:
entity_sequence.append("null")
else:
entity_sequence.append(" ".join(example["control_code"]))
entity_list = list(example["entities"].items())
random.shuffle(entity_list)
for entity in entity_list:
entity_text = entity[0].replace("_", " ") + " | "+ " | ".join(entity[1])
entity_sequence.append(entity_text)
for sub_seq in entity_sequence:
entity_tokens.extend(self.tokenizer.tokenize(sub_seq.lower(), add_prefix_space=True))
entity_tokens.append(self.tokenizer.sep_token)
entity_token_ids_sequences.append(self.tokenizer.convert_tokens_to_ids(entity_tokens))
padded_sql_ids_tensor = pad_and_tensorize_sequence(
entity_token_ids_sequences, padding_value=self.tokenizer.pad_token_id)
return {
"input_ids": padded_sql_ids_tensor,
"labels": padded_text_ids_tensor,
"pad_token_id": self.tokenizer.pad_token_id,
"label_eos_id": self.label_eos_id,
"label_bos_id": self.label_bos_id,
"label_padding_id": self.tokenizer.pad_token_id
} |