




import contextlib
import os
import sqlitea

import pytest

from datasets import Dataset, Features, Value
from datasets.io.sql import SqlDatasetReader, SqlDatasetWriter

from ..utils import assert_arrow_memory_doesnt_increase, assert_arrow_memory_increases, require_sqlalchemy


def 		lowerCamelCase__       (						_A	,      _A				):







	'''simple docstring'''





	assert isinstance(_A	,      _A				)
	assert dataset.num_rows == 4
	assert dataset.num_columns == 3
	assert dataset.column_names == ["col_1", "col_2", "col_3"]
	for feature, expected_dtype in expected_features.items():
		assert dataset.features[feature].dtype == expected_dtype


@require_sqlalchemy
@pytest.mark.parametrize("keep_in_memory"	,      [False, True]				)
def 		lowerCamelCase__       (						_A	,      _A	,      _A	,      _A				):







	'''simple docstring'''





	snake_case_						       =	tmp_path / "cache"
	snake_case_						       =	{"col_1": "string", "col_2": "int64", "col_3": "float64"}
	with assert_arrow_memory_increases() if keep_in_memory else assert_arrow_memory_doesnt_increase():
		snake_case_						       =	SqlDatasetReader(
		    "dataset"	,      "sqlite:///" + sqlite_path	,      cache_dir=_A	,      keep_in_memory=_A				).read()
	_check_sql_dataset(_A	,      _A				)


@require_sqlalchemy
@pytest.mark.parametrize(
    "features"	,      [
        None,
        {"col_1": "string", "col_2": "int64", "col_3": "float64"},
        {"col_1": "string", "col_2": "string", "col_3": "string"},
        {"col_1": "int32", "col_2": "int32", "col_3": "int32"},
        {"col_1": "float32", "col_2": "float32", "col_3": "float32"},
    ]	,      )
def 		lowerCamelCase__       (						_A	,      _A	,      _A	,      _A				):







	'''simple docstring'''





	snake_case_						       =	tmp_path / "cache"
	snake_case_						       =	{"col_1": "string", "col_2": "int64", "col_3": "float64"}
	snake_case_						       =	features.copy() if features else default_expected_features
	snake_case_						       =	(
	    Features({feature: Value(_A				) for feature, dtype in features.items()}				) if features is not None else None
	)
	snake_case_						       =	SqlDatasetReader("dataset"	,      "sqlite:///" + sqlite_path	,      features=_A	,      cache_dir=_A				).read()
	_check_sql_dataset(_A	,      _A				)


def 		lowerCamelCase__       (						_A				):







	'''simple docstring'''





	with contextlib.closing(sqlitea.connect(_A				)				) as con:
		snake_case_						       =	con.cursor()
		cur.execute("SELECT * FROM dataset"				)
		for row in cur:
			yield row


@require_sqlalchemy
def 		lowerCamelCase__       (						_A	,      _A	,      _A				):







	'''simple docstring'''





	snake_case_						       =	tmp_path / "cache"
	snake_case_						       =	os.path.join(_A	,      "tmp.sql"				)
	snake_case_						       =	SqlDatasetReader("dataset"	,      "sqlite:///" + sqlite_path	,      cache_dir=_A				).read()
	SqlDatasetWriter(_A	,      "dataset"	,      "sqlite:///" + output_sqlite_path	,      num_proc=1				).write()

	snake_case_						       =	iter_sql_file(_A				)
	snake_case_						       =	iter_sql_file(_A				)

	for rowa, rowa in zip(_A	,      _A				):
		assert rowa == rowa


@require_sqlalchemy
def 		lowerCamelCase__       (						_A	,      _A	,      _A				):







	'''simple docstring'''





	snake_case_						       =	tmp_path / "cache"
	snake_case_						       =	os.path.join(_A	,      "tmp.sql"				)
	snake_case_						       =	SqlDatasetReader("dataset"	,      "sqlite:///" + sqlite_path	,      cache_dir=_A				).read()
	SqlDatasetWriter(_A	,      "dataset"	,      "sqlite:///" + output_sqlite_path	,      num_proc=2				).write()

	snake_case_						       =	iter_sql_file(_A				)
	snake_case_						       =	iter_sql_file(_A				)

	for rowa, rowa in zip(_A	,      _A				):
		assert rowa == rowa






@require_sqlalchemy
def 		lowerCamelCase__       (						_A	,      _A	,      _A				):







	'''simple docstring'''





	snake_case_						       =	tmp_path / "cache"
	snake_case_						       =	os.path.join(_A	,      "tmp.sql"				)
	snake_case_						       =	SqlDatasetReader("dataset"	,      "sqlite:///" + sqlite_path	,      cache_dir=_A				).read()
	with pytest.raises(_A				):
		SqlDatasetWriter(_A	,      "dataset"	,      "sqlite:///" + output_sqlite_path	,      num_proc=0				).write()






from abc import ABC, abstractmethod
from argparse import ArgumentParser
class 						UpperCAmelCase  (							UpperCAmelCase__     ):







						'''simple docstring'''





						@staticmethod
						@abstractmethod
						def 			snake_case__		(		__lowercase				:	ArgumentParser		):






							"""simple docstring"""






							raise NotImplementedError()






						@abstractmethod
						def 			snake_case__		(		self				:	Optional[Any]		):






							"""simple docstring"""






							raise NotImplementedError()
