def to_parquet( # pylint: disable=too-many-arguments,too-many-locals
df: pd.DataFrame,
path: str,
index: bool = False,
compression: Optional[str] = "snappy",
use_threads: bool = True,
boto3_session: Optional[boto3.Session] = None,
s3_additional_kwargs: Optional[Dict[str, str]] = None,
sanitize_columns: bool = False,
dataset: bool = False,
partition_cols: Optional[List[str]] = None,
mode: Optional[str] = None,
catalog_versioning: bool = False,
database: Optional[str] = None,
table: Optional[str] = None,
dtype: Optional[Dict[str, str]] = None,
description: Optional[str] = None,
parameters: Optional[Dict[str, str]] = None,
columns_comments: Optional[Dict[str, str]] = None,
regular_partitions: bool = True,
projection_enabled: bool = False,
projection_types: Optional[Dict[str, str]] = None,
projection_ranges: Optional[Dict[str, str]] = None,
projection_values: Optional[Dict[str, str]] = None,
projection_intervals: Optional[Dict[str, str]] = None,
projection_digits: Optional[Dict[str, str]] = None,
) -> Dict[str, Union[List[str], Dict[str, List[str]]]]:
"""Write Parquet file or dataset on Amazon S3.
The concept of Dataset goes beyond the simple idea of files and enable more
complex features like partitioning, casting and catalog integration (Amazon Athena/AWS Glue Catalog).
Note
----
If `dataset=True` The table name and all column names will be automatically sanitized using
`wr.catalog.sanitize_table_name` and `wr.catalog.sanitize_column_name`.
Please, pass `sanitize_columns=True` to force the same behaviour for `dataset=False`.
Note
----
On `append` mode, the `parameters` will be upsert on an existing table.
Note
----
In case of `use_threads=True` the number of threads that will be spawned will be get from os.cpu_count().
Parameters
----------
df: pandas.DataFrame
Pandas DataFrame https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.html
path : str
S3 path (for file e.g. ``s3://bucket/prefix/filename.parquet``) (for dataset e.g. ``s3://bucket/prefix``).
index : bool
True to store the DataFrame index in file, otherwise False to ignore it.
compression: str, optional
Compression style (``None``, ``snappy``, ``gzip``).
use_threads : bool
True to enable concurrent requests, False to disable multiple threads.
If enabled os.cpu_count() will be used as the max number of threads.
boto3_session : boto3.Session(), optional
Boto3 Session. The default boto3 session will be used if boto3_session receive None.
s3_additional_kwargs:
Forward to s3fs, useful for server side encryption
https://s3fs.readthedocs.io/en/latest/#serverside-encryption
sanitize_columns : bool
True to sanitize columns names or False to keep it as is.
True value is forced if `dataset=True`.
dataset : bool
If True store a parquet dataset instead of a single file.
If True, enable all follow arguments:
partition_cols, mode, database, table, description, parameters, columns_comments, .
partition_cols: List[str], optional
List of column names that will be used to create partitions. Only takes effect if dataset=True.
mode: str, optional
``append`` (Default), ``overwrite``, ``overwrite_partitions``. Only takes effect if dataset=True.
catalog_versioning : bool
If True and `mode="overwrite"`, creates an archived version of the table catalog before updating it.
database : str, optional
Glue/Athena catalog: Database name.
table : str, optional
Glue/Athena catalog: Table name.
dtype : Dict[str, str], optional
Dictionary of columns names and Athena/Glue types to be casted.
Useful when you have columns with undetermined or mixed data types.
(e.g. {'col name': 'bigint', 'col2 name': 'int'})
description : str, optional
Glue/Athena catalog: Table description
parameters : Dict[str, str], optional
Glue/Athena catalog: Key/value pairs to tag the table.
columns_comments : Dict[str, str], optional
Glue/Athena catalog:
Columns names and the related comments (e.g. {'col0': 'Column 0.', 'col1': 'Column 1.', 'col2': 'Partition.'}).
regular_partitions : bool
Create regular partitions (Non projected partitions) on Glue Catalog.
Disable when you will work only with Partition Projection.
Keep enabled even when working with projections is useful to keep
Redshift Spectrum working with the regular partitions.
projection_enabled : bool
Enable Partition Projection on Athena (https://docs.aws.amazon.com/athena/latest/ug/partition-projection.html)
projection_types : Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections types.
Valid types: "enum", "integer", "date", "injected"
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': 'enum', 'col2_name': 'integer'})
projection_ranges: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections ranges.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '0,10', 'col2_name': '-1,8675309'})
projection_values: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections values.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': 'A,B,Unknown', 'col2_name': 'foo,boo,bar'})
projection_intervals: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections intervals.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '1', 'col2_name': '5'})
projection_digits: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections digits.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '1', 'col2_name': '2'})
Returns
-------
Dict[str, Union[List[str], Dict[str, List[str]]]]
Dictionary with:
'paths': List of all stored files paths on S3.
'partitions_values': Dictionary of partitions added with keys as S3 path locations
and values as a list of partitions values as str.
Examples
--------
Writing single file
>>> import awswrangler as wr
>>> import pandas as pd
>>> wr.s3.to_parquet(
... df=pd.DataFrame({'col': [1, 2, 3]}),
... path='s3://bucket/prefix/my_file.parquet',
... )
{
'paths': ['s3://bucket/prefix/my_file.parquet'],
'partitions_values': {}
}
Writing single file encrypted with a KMS key
>>> import awswrangler as wr
>>> import pandas as pd
>>> wr.s3.to_parquet(
... df=pd.DataFrame({'col': [1, 2, 3]}),
... path='s3://bucket/prefix/my_file.parquet',
... s3_additional_kwargs={
... 'ServerSideEncryption': 'aws:kms',
... 'SSEKMSKeyId': 'YOUR_KMY_KEY_ARN'
... }
... )
{
'paths': ['s3://bucket/prefix/my_file.parquet'],
'partitions_values': {}
}
Writing partitioned dataset
>>> import awswrangler as wr
>>> import pandas as pd
>>> wr.s3.to_parquet(
... df=pd.DataFrame({
... 'col': [1, 2, 3],
... 'col2': ['A', 'A', 'B']
... }),
... path='s3://bucket/prefix',
... dataset=True,
... partition_cols=['col2']
... )
{
'paths': ['s3://.../col2=A/x.parquet', 's3://.../col2=B/y.parquet'],
'partitions_values: {
's3://.../col2=A/': ['A'],
's3://.../col2=B/': ['B']
}
}
Writing dataset to S3 with metadata on Athena/Glue Catalog.
>>> import awswrangler as wr
>>> import pandas as pd
>>> wr.s3.to_parquet(
... df=pd.DataFrame({
... 'col': [1, 2, 3],
... 'col2': ['A', 'A', 'B']
... }),
... path='s3://bucket/prefix',
... dataset=True,
... partition_cols=['col2'],
... database='default', # Athena/Glue database
... table='my_table' # Athena/Glue table
... )
{
'paths': ['s3://.../col2=A/x.parquet', 's3://.../col2=B/y.parquet'],
'partitions_values: {
's3://.../col2=A/': ['A'],
's3://.../col2=B/': ['B']
}
}
Writing dataset casting empty column data type
>>> import awswrangler as wr
>>> import pandas as pd
>>> wr.s3.to_parquet(
... df=pd.DataFrame({
... 'col': [1, 2, 3],
... 'col2': ['A', 'A', 'B'],
... 'col3': [None, None, None]
... }),
... path='s3://bucket/prefix',
... dataset=True,
... database='default', # Athena/Glue database
... table='my_table' # Athena/Glue table
... dtype={'col3': 'date'}
... )
{
'paths': ['s3://.../x.parquet'],
'partitions_values: {}
}
"""
if (database is None) ^ (table is None):
raise exceptions.InvalidArgumentCombination(
"Please pass database and table arguments to be able to store the metadata into the Athena/Glue Catalog."
)
if df.empty is True:
raise exceptions.EmptyDataFrame()
partition_cols = partition_cols if partition_cols else []
dtype = dtype if dtype else {}
partitions_values: Dict[str, List[str]] = {}
# Sanitize table to respect Athena's standards
if (sanitize_columns is True) or (dataset is True):
df = catalog.sanitize_dataframe_columns_names(df=df)
partition_cols = [catalog.sanitize_column_name(p) for p in partition_cols]
dtype = {catalog.sanitize_column_name(k): v.lower() for k, v in dtype.items()}
catalog.drop_duplicated_columns(df=df)
session: boto3.Session = _utils.ensure_session(session=boto3_session)
cpus: int = _utils.ensure_cpu_count(use_threads=use_threads)
fs: s3fs.S3FileSystem = _utils.get_fs(session=session, s3_additional_kwargs=s3_additional_kwargs)
compression_ext: Optional[str] = _COMPRESSION_2_EXT.get(compression, None)
if compression_ext is None:
raise exceptions.InvalidCompression(f"{compression} is invalid, please use None, snappy or gzip.")
if dataset is False:
if path.endswith("/"): # pragma: no cover
raise exceptions.InvalidArgumentValue(
"If <dataset=False>, the argument <path> should be a object path, not a directory."
)
if partition_cols:
raise exceptions.InvalidArgumentCombination("Please, pass dataset=True to be able to use partition_cols.")
if mode is not None:
raise exceptions.InvalidArgumentCombination("Please pass dataset=True to be able to use mode.")
if any(arg is not None for arg in (database, table, description, parameters)):
raise exceptions.InvalidArgumentCombination(
"Please pass dataset=True to be able to use any one of these "
"arguments: database, table, description, parameters, "
"columns_comments."
)
df = _data_types.cast_pandas_with_athena_types(df=df, dtype=dtype)
schema: pa.Schema = _data_types.pyarrow_schema_from_pandas(
df=df, index=index, ignore_cols=partition_cols, dtype=dtype
)
_logger.debug("schema: \n%s", schema)
paths = [
_to_parquet_file(
df=df, path=path, schema=schema, index=index, compression=compression, cpus=cpus, fs=fs, dtype=dtype
)
]
else:
mode = "append" if mode is None else mode
if (
(mode in ("append", "overwrite_partitions")) and (database is not None) and (table is not None)
): # Fetching Catalog Types
catalog_types: Optional[Dict[str, str]] = catalog.get_table_types(
database=database, table=table, boto3_session=session
)
if catalog_types is not None:
for k, v in catalog_types.items():
dtype[k] = v
paths, partitions_values = _to_parquet_dataset(
df=df,
path=path,
index=index,
compression=compression,
compression_ext=compression_ext,
cpus=cpus,
fs=fs,
use_threads=use_threads,
partition_cols=partition_cols,
dtype=dtype,
mode=mode,
boto3_session=session,
)
if (database is not None) and (table is not None):
columns_types, partitions_types = _data_types.athena_types_from_pandas_partitioned(
df=df, index=index, partition_cols=partition_cols, dtype=dtype
)
catalog.create_parquet_table(
database=database,
table=table,
path=path,
columns_types=columns_types,
partitions_types=partitions_types,
compression=compression,
description=description,
parameters=parameters,
columns_comments=columns_comments,
boto3_session=session,
mode=mode,
catalog_versioning=catalog_versioning,
projection_enabled=projection_enabled,
projection_types=projection_types,
projection_ranges=projection_ranges,
projection_values=projection_values,
projection_intervals=projection_intervals,
projection_digits=projection_digits,
)
if partitions_values and (regular_partitions is True):
_logger.debug("partitions_values:\n%s", partitions_values)
catalog.add_parquet_partitions(
database=database,
table=table,
partitions_values=partitions_values,
compression=compression,
boto3_session=session,
)
return {"paths": paths, "partitions_values": partitions_values}
def store_parquet_metadata( # pylint: disable=too-many-arguments
path: str,
database: str,
table: str,
catalog_id: Optional[str] = None,
path_suffix: Optional[str] = None,
path_ignore_suffix: Optional[str] = None,
ignore_empty: bool = True,
dtype: Optional[Dict[str, str]] = None,
sampling: float = 1.0,
dataset: bool = False,
use_threads: Union[bool, int] = True,
description: Optional[str] = None,
parameters: Optional[Dict[str, str]] = None,
columns_comments: Optional[Dict[str, str]] = None,
compression: Optional[str] = None,
mode: str = "overwrite",
catalog_versioning: bool = False,
regular_partitions: bool = True,
projection_enabled: bool = False,
projection_types: Optional[Dict[str, str]] = None,
projection_ranges: Optional[Dict[str, str]] = None,
projection_values: Optional[Dict[str, str]] = None,
projection_intervals: Optional[Dict[str, str]] = None,
projection_digits: Optional[Dict[str, str]] = None,
s3_additional_kwargs: Optional[Dict[str, Any]] = None,
boto3_session: Optional[boto3.Session] = None,
) -> Tuple[Dict[str, str], Optional[Dict[str, str]], Optional[Dict[str, List[str]]]]:
"""Infer and store parquet metadata on AWS Glue Catalog.
Infer Apache Parquet file(s) metadata from from a received S3 prefix or list of S3 objects paths
And then stores it on AWS Glue Catalog including all inferred partitions
(No need of 'MSCK REPAIR TABLE')
The concept of Dataset goes beyond the simple idea of files and enable more
complex features like partitioning and catalog integration (AWS Glue Catalog).
This function accepts Unix shell-style wildcards in the path argument.
* (matches everything), ? (matches any single character),
[seq] (matches any character in seq), [!seq] (matches any character not in seq).
If you want to use a path which includes Unix shell-style wildcard characters (`*, ?, []`),
you can use `glob.escape(path)` before passing the path to this function.
Note
----
On `append` mode, the `parameters` will be upsert on an existing table.
Note
----
In case of `use_threads=True` the number of threads
that will be spawned will be gotten from os.cpu_count().
Parameters
----------
path : Union[str, List[str]]
S3 prefix (accepts Unix shell-style wildcards)
(e.g. s3://bucket/prefix) or list of S3 objects paths (e.g. [s3://bucket/key0, s3://bucket/key1]).
database : str
Glue/Athena catalog: Database name.
table : str
Glue/Athena catalog: Table name.
database : str
AWS Glue Catalog database name.
catalog_id : str, optional
The ID of the Data Catalog from which to retrieve Databases.
If none is provided, the AWS account ID is used by default.
path_suffix: Union[str, List[str], None]
Suffix or List of suffixes for filtering S3 keys.
path_ignore_suffix: Union[str, List[str], None]
Suffix or List of suffixes for S3 keys to be ignored.
ignore_empty: bool
Ignore files with 0 bytes.
dtype : Dict[str, str], optional
Dictionary of columns names and Athena/Glue types to be casted.
Useful when you have columns with undetermined data types as partitions columns.
(e.g. {'col name': 'bigint', 'col2 name': 'int'})
sampling : float
Random sample ratio of files that will have the metadata inspected.
Must be `0.0 < sampling <= 1.0`.
The higher, the more accurate.
The lower, the faster.
dataset: bool
If True read a parquet dataset instead of simple file(s) loading all the related partitions as columns.
use_threads : bool, int
True to enable concurrent requests, False to disable multiple threads.
If enabled os.cpu_count() will be used as the max number of threads.
If integer is provided, specified number is used.
description: str, optional
Glue/Athena catalog: Table description
parameters: Dict[str, str], optional
Glue/Athena catalog: Key/value pairs to tag the table.
columns_comments: Dict[str, str], optional
Glue/Athena catalog:
Columns names and the related comments (e.g. {'col0': 'Column 0.', 'col1': 'Column 1.', 'col2': 'Partition.'}).
compression: str, optional
Compression style (``None``, ``snappy``, ``gzip``, etc).
mode: str
'overwrite' to recreate any possible existing table or 'append' to keep any possible existing table.
catalog_versioning : bool
If True and `mode="overwrite"`, creates an archived version of the table catalog before updating it.
regular_partitions : bool
Create regular partitions (Non projected partitions) on Glue Catalog.
Disable when you will work only with Partition Projection.
Keep enabled even when working with projections is useful to keep
Redshift Spectrum working with the regular partitions.
projection_enabled : bool
Enable Partition Projection on Athena (https://docs.aws.amazon.com/athena/latest/ug/partition-projection.html)
projection_types : Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections types.
Valid types: "enum", "integer", "date", "injected"
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': 'enum', 'col2_name': 'integer'})
projection_ranges: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections ranges.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '0,10', 'col2_name': '-1,8675309'})
projection_values: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections values.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': 'A,B,Unknown', 'col2_name': 'foo,boo,bar'})
projection_intervals: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections intervals.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '1', 'col2_name': '5'})
projection_digits: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections digits.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '1', 'col2_name': '2'})
s3_additional_kwargs : Optional[Dict[str, Any]]
Forwarded to botocore requests.
e.g. s3_additional_kwargs={'ServerSideEncryption': 'aws:kms', 'SSEKMSKeyId': 'YOUR_KMS_KEY_ARN'}
boto3_session : boto3.Session(), optional
Boto3 Session. The default boto3 session will be used if boto3_session receive None.
Returns
-------
Tuple[Dict[str, str], Optional[Dict[str, str]], Optional[Dict[str, List[str]]]]
The metadata used to create the Glue Table.
columns_types: Dictionary with keys as column names and values as
data types (e.g. {'col0': 'bigint', 'col1': 'double'}). /
partitions_types: Dictionary with keys as partition names
and values as data types (e.g. {'col2': 'date'}). /
partitions_values: Dictionary with keys as S3 path locations and values as a
list of partitions values as str (e.g. {'s3://bucket/prefix/y=2020/m=10/': ['2020', '10']}).
Examples
--------
Reading all Parquet files metadata under a prefix
>>> import awswrangler as wr
>>> columns_types, partitions_types, partitions_values = wr.s3.store_parquet_metadata(
... path='s3://bucket/prefix/',
... database='...',
... table='...',
... dataset=True
... )
"""
session: boto3.Session = _utils.ensure_session(session=boto3_session)
columns_types: Dict[str, str]
partitions_types: Optional[Dict[str, str]]
partitions_values: Optional[Dict[str, List[str]]]
columns_types, partitions_types, partitions_values = _read_parquet_metadata(
path=path,
dtype=dtype,
sampling=sampling,
dataset=dataset,
path_suffix=path_suffix,
path_ignore_suffix=path_ignore_suffix,
ignore_empty=ignore_empty,
use_threads=use_threads,
s3_additional_kwargs=s3_additional_kwargs,
boto3_session=session,
)
_logger.debug("columns_types: %s", columns_types)
_logger.debug("partitions_types: %s", partitions_types)
_logger.debug("partitions_values: %s", partitions_values)
catalog.create_parquet_table(
database=database,
table=table,
path=path,
columns_types=columns_types,
partitions_types=partitions_types,
description=description,
parameters=parameters,
columns_comments=columns_comments,
mode=mode,
compression=compression,
catalog_versioning=catalog_versioning,
projection_enabled=projection_enabled,
projection_types=projection_types,
projection_ranges=projection_ranges,
projection_values=projection_values,
projection_intervals=projection_intervals,
projection_digits=projection_digits,
boto3_session=session,
catalog_id=catalog_id,
)
if (partitions_types is not None) and (partitions_values is not None) and (regular_partitions is True):
catalog.add_parquet_partitions(
database=database,
table=table,
partitions_values=partitions_values,
compression=compression,
boto3_session=session,
catalog_id=catalog_id,
columns_types=columns_types,
)
return columns_types, partitions_types, partitions_values
def store_parquet_metadata( # pylint: disable=too-many-arguments
path: str,
database: str,
table: str,
dtype: Optional[Dict[str, str]] = None,
sampling: float = 1.0,
dataset: bool = False,
use_threads: bool = True,
description: Optional[str] = None,
parameters: Optional[Dict[str, str]] = None,
columns_comments: Optional[Dict[str, str]] = None,
compression: Optional[str] = None,
mode: str = "overwrite",
catalog_versioning: bool = False,
regular_partitions: bool = True,
projection_enabled: bool = False,
projection_types: Optional[Dict[str, str]] = None,
projection_ranges: Optional[Dict[str, str]] = None,
projection_values: Optional[Dict[str, str]] = None,
projection_intervals: Optional[Dict[str, str]] = None,
projection_digits: Optional[Dict[str, str]] = None,
boto3_session: Optional[boto3.Session] = None,
) -> Tuple[Dict[str, str], Optional[Dict[str, str]], Optional[Dict[
str, List[str]]]]:
"""Infer and store parquet metadata on AWS Glue Catalog.
Infer Apache Parquet file(s) metadata from from a received S3 prefix or list of S3 objects paths
And then stores it on AWS Glue Catalog including all inferred partitions
(No need of 'MCSK REPAIR TABLE')
The concept of Dataset goes beyond the simple idea of files and enable more
complex features like partitioning and catalog integration (AWS Glue Catalog).
Note
----
On `append` mode, the `parameters` will be upsert on an existing table.
Note
----
In case of `use_threads=True` the number of threads that will be spawned will be get from os.cpu_count().
Parameters
----------
path : Union[str, List[str]]
S3 prefix (e.g. s3://bucket/prefix) or list of S3 objects paths (e.g. [s3://bucket/key0, s3://bucket/key1]).
database : str
Glue/Athena catalog: Database name.
table : str
Glue/Athena catalog: Table name.
dtype : Dict[str, str], optional
Dictionary of columns names and Athena/Glue types to be casted.
Useful when you have columns with undetermined data types as partitions columns.
(e.g. {'col name': 'bigint', 'col2 name': 'int'})
sampling : float
Random sample ratio of files that will have the metadata inspected.
Must be `0.0 < sampling <= 1.0`.
The higher, the more accurate.
The lower, the faster.
dataset: bool
If True read a parquet dataset instead of simple file(s) loading all the related partitions as columns.
use_threads : bool
True to enable concurrent requests, False to disable multiple threads.
If enabled os.cpu_count() will be used as the max number of threads.
description: str, optional
Glue/Athena catalog: Table description
parameters: Dict[str, str], optional
Glue/Athena catalog: Key/value pairs to tag the table.
columns_comments: Dict[str, str], optional
Glue/Athena catalog:
Columns names and the related comments (e.g. {'col0': 'Column 0.', 'col1': 'Column 1.', 'col2': 'Partition.'}).
compression: str, optional
Compression style (``None``, ``snappy``, ``gzip``, etc).
mode: str
'overwrite' to recreate any possible existing table or 'append' to keep any possible existing table.
catalog_versioning : bool
If True and `mode="overwrite"`, creates an archived version of the table catalog before updating it.
regular_partitions : bool
Create regular partitions (Non projected partitions) on Glue Catalog.
Disable when you will work only with Partition Projection.
Keep enabled even when working with projections is useful to keep
Redshift Spectrum working with the regular partitions.
projection_enabled : bool
Enable Partition Projection on Athena (https://docs.aws.amazon.com/athena/latest/ug/partition-projection.html)
projection_types : Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections types.
Valid types: "enum", "integer", "date", "injected"
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': 'enum', 'col2_name': 'integer'})
projection_ranges: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections ranges.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '0,10', 'col2_name': '-1,8675309'})
projection_values: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections values.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': 'A,B,Unknown', 'col2_name': 'foo,boo,bar'})
projection_intervals: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections intervals.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '1', 'col2_name': '5'})
projection_digits: Optional[Dict[str, str]]
Dictionary of partitions names and Athena projections digits.
https://docs.aws.amazon.com/athena/latest/ug/partition-projection-supported-types.html
(e.g. {'col_name': '1', 'col2_name': '2'})
boto3_session : boto3.Session(), optional
Boto3 Session. The default boto3 session will be used if boto3_session receive None.
Returns
-------
Tuple[Dict[str, str], Optional[Dict[str, str]], Optional[Dict[str, List[str]]]]
The metadata used to create the Glue Table.
columns_types: Dictionary with keys as column names and vales as
data types (e.g. {'col0': 'bigint', 'col1': 'double'}). /
partitions_types: Dictionary with keys as partition names
and values as data types (e.g. {'col2': 'date'}). /
partitions_values: Dictionary with keys as S3 path locations and values as a
list of partitions values as str (e.g. {'s3://bucket/prefix/y=2020/m=10/': ['2020', '10']}).
Examples
--------
Reading all Parquet files metadata under a prefix
>>> import awswrangler as wr
>>> columns_types, partitions_types, partitions_values = wr.s3.store_parquet_metadata(
... path='s3://bucket/prefix/',
... database='...',
... table='...',
... dataset=True
... )
"""
session: boto3.Session = _utils.ensure_session(session=boto3_session)
columns_types: Dict[str, str]
partitions_types: Optional[Dict[str, str]]
partitions_values: Optional[Dict[str, List[str]]]
columns_types, partitions_types, partitions_values = read_parquet_metadata_internal(
path=path,
dtype=dtype,
sampling=sampling,
dataset=dataset,
use_threads=use_threads,
boto3_session=session)
_logger.debug("columns_types: %s", columns_types)
_logger.debug("partitions_types: %s", partitions_types)
_logger.debug("partitions_values: %s", partitions_values)
catalog.create_parquet_table(
database=database,
table=table,
path=path,
columns_types=columns_types,
partitions_types=partitions_types,
description=description,
parameters=parameters,
columns_comments=columns_comments,
mode=mode,
catalog_versioning=catalog_versioning,
projection_enabled=projection_enabled,
projection_types=projection_types,
projection_ranges=projection_ranges,
projection_values=projection_values,
projection_intervals=projection_intervals,
projection_digits=projection_digits,
boto3_session=session,
)
if (partitions_types
is not None) and (partitions_values
is not None) and (regular_partitions is True):
catalog.add_parquet_partitions(
database=database,
table=table,
partitions_values=partitions_values,
compression=compression,
boto3_session=session,
)
return columns_types, partitions_types, partitions_values
