'''simple docstring'''




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 				snake_case__							(			_A:					Optional[int]      ,   _A:					str )    ->	List[str]:

		'''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 				snake_case__							(			_A:					List[str]      ,   _A:					List[Any]      ,   _A:					List[str]      ,   _A:					str )    ->	str:

		'''simple docstring'''


		lowerCAmelCase   					=  tmp_path / """cache"""
		lowerCAmelCase   					=  {"""col_1""": """string""", """col_2""": """int64""", """col_3""": """float64"""}
		with assert_arrow_memory_increases() if keep_in_memory else assert_arrow_memory_doesnt_increase():
				lowerCAmelCase   					=  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 				snake_case__							(			_A:					Optional[Any]      ,   _A:					Any      ,   _A:					Dict      ,   _A:					Tuple )    ->	str:

		'''simple docstring'''


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






def 				snake_case__							(			_A:					List[str] )    ->	Optional[Any]:

		'''simple docstring'''


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






@require_sqlalchemy
def 				snake_case__							(			_A:					List[Any]      ,   _A:					Union[str, Any]      ,   _A:					Any )    ->	Any:

		'''simple docstring'''


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

		lowerCAmelCase   					=  iter_sql_file(_A )
		lowerCAmelCase   					=  iter_sql_file(_A )

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






@require_sqlalchemy
def 				snake_case__							(			_A:					str      ,   _A:					Any      ,   _A:					Any )    ->	List[str]:

		'''simple docstring'''


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

		lowerCAmelCase   					=  iter_sql_file(_A )
		lowerCAmelCase   					=  iter_sql_file(_A )

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






@require_sqlalchemy
def 				snake_case__							(			_A:					int      ,   _A:					str      ,   _A:					Dict )    ->	List[str]:

		'''simple docstring'''


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





'''simple docstring'''




def 				snake_case__							(			_A:					str )    ->	list[int]:

		'''simple docstring'''


		lowerCAmelCase   					=  [0 for i in range(len(_A ) )]

		# initialize interval's left pointer and right pointer
		lowerCAmelCase					,     lowerCAmelCase   					=  0, 0

		for i in range(1      ,   len(_A ) ):
				# case when current index is inside the interval
				if i <= right_pointer:
						lowerCAmelCase   					=  min(right_pointer - i + 1      ,   z_result[i - left_pointer] )
						lowerCAmelCase   					=  min_edge

				while go_next(_A      ,   _A      ,   _A ):
						z_result[i] += 1

				# if new index's result gives us more right interval,
				# we've to update left_pointer and right_pointer
				if i + z_result[i] - 1 > right_pointer:
						lowerCAmelCase					,     lowerCAmelCase   					=  i, i + z_result[i] - 1

		return z_result






def 				snake_case__							(			_A:					int      ,   _A:					list[int]      ,   _A:					str )    ->	bool:

		'''simple docstring'''


		return i + z_result[i] < len(_A ) and s[z_result[i]] == s[i + z_result[i]]






def 				snake_case__							(			_A:					str      ,   _A:					str )    ->	int:

		'''simple docstring'''


		lowerCAmelCase   					=  0
		# concatenate 'pattern' and 'input_str' and call z_function
		# with concatenated string
		lowerCAmelCase   					=  z_function(pattern + input_str )

		for val in z_result:
				# if value is greater then length of the pattern string
				# that means this index is starting position of substring
				# which is equal to pattern string
				if val >= len(_A ):
						answer += 1

		return answer


if __name__ == "__main__":
						import doctest

						doctest.testmod()




