# Copyright 2018 Iguazio
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import json
import os
import warnings
from base64 import b64encode
from copy import copy
from datetime import datetime
from typing import Dict, List, Optional, Union
import pandas as pd
import v3io
import v3io.dataplane
from nuclio import KafkaTrigger
from nuclio.config import split_path
import mlrun
from mlrun.secrets import SecretsStore
from ..config import config
from ..model import DataSource
from ..platforms.iguazio import parse_path
from ..utils import get_class
from .utils import store_path_to_spark
def get_source_from_dict(source):
kind = source.get("kind", "")
if not kind:
return None
return source_kind_to_driver[kind].from_dict(source)
def get_source_step(source, key_fields=None, time_field=None, context=None):
"""initialize the source driver"""
if hasattr(source, "to_csv"):
source = DataFrameSource(source, context=context)
if not key_fields and not source.key_field:
raise mlrun.errors.MLRunInvalidArgumentError("key column is not defined")
return source.to_step(key_fields, time_field, context)
class BaseSourceDriver(DataSource):
support_spark = False
support_storey = False
def _get_store(self):
store, _ = mlrun.store_manager.get_or_create_store(self.path)
return store
def to_step(self, key_field=None, time_field=None, context=None):
import storey
return storey.SyncEmitSource(context=context)
def get_table_object(self):
"""get storey Table object"""
return None
def to_dataframe(self):
return mlrun.store_manager.object(url=self.path).as_df()
def filter_df_start_end_time(self, df, time_field):
# give priority to source time_field over the feature set's timestamp_key
if self.time_field:
time_field = self.time_field
if self.start_time or self.end_time:
self.start_time = (
datetime.min if self.start_time is None else self.start_time
)
self.end_time = datetime.max if self.end_time is None else self.end_time
df = df.filter(
(df[time_field] > self.start_time) & (df[time_field] <= self.end_time)
)
return df
def to_spark_df(self, session, named_view=False, time_field=None):
if self.support_spark:
df = session.read.load(**self.get_spark_options())
if named_view:
df.createOrReplaceTempView(self.name)
return df
raise NotImplementedError()
def get_spark_options(self):
# options used in spark.read.load(**options)
raise NotImplementedError()
def is_iterator(self):
return False
[docs]class CSVSource(BaseSourceDriver):
"""
Reads CSV file as input source for a flow.
:parameter name: name of the source
:parameter path: path to CSV file
:parameter key_field: the CSV field to be used as the key for events. May be an int (field index) or string
(field name) if with_header is True. Defaults to None (no key). Can be a list of keys.
:parameter time_field: DEPRECATED. Use parse_dates to parse timestamps.
:parameter schedule: string to configure scheduling of the ingestion job.
:parameter attributes: additional parameters to pass to storey. For example:
attributes={"timestamp_format": '%Y%m%d%H'}
:parameter parse_dates: Optional. List of columns (names or integers) that will be
attempted to parse as date column.
"""
kind = "csv"
support_storey = True
support_spark = True
def __init__(
self,
name: str = "",
path: str = None,
attributes: Dict[str, str] = None,
key_field: str = None,
time_field: str = None,
schedule: str = None,
parse_dates: Union[None, int, str, List[int], List[str]] = None,
**kwargs,
):
super().__init__(
name, path, attributes, key_field, time_field, schedule, **kwargs
)
if time_field is not None:
warnings.warn(
"CSVSource's time_field parameter is deprecated in 1.3.0 and will be removed in 1.5.0. "
"Use parse_dates instead.",
# TODO: remove in 1.5.0
FutureWarning,
)
if isinstance(parse_dates, (int, str)):
parse_dates = [parse_dates]
if parse_dates is None:
parse_dates = [time_field]
elif time_field not in parse_dates:
parse_dates = copy(parse_dates)
parse_dates.append(time_field)
self._parse_dates = parse_dates
[docs] def to_step(self, key_field=None, time_field=None, context=None):
import storey
attributes = self.attributes or {}
if context:
attributes["context"] = context
parse_dates = self._parse_dates or []
if time_field and time_field not in parse_dates:
parse_dates.append(time_field)
return storey.CSVSource(
paths=self.path,
header=True,
build_dict=True,
key_field=self.key_field or key_field,
storage_options=self._get_store().get_storage_options(),
parse_dates=parse_dates,
**attributes,
)
[docs] def get_spark_options(self):
return {
"path": store_path_to_spark(self.path),
"format": "csv",
"header": "true",
"inferSchema": "true",
}
[docs] def to_spark_df(self, session, named_view=False, time_field=None):
import pyspark.sql.functions as funcs
df = session.read.load(**self.get_spark_options())
parse_dates = self._parse_dates or []
if time_field and time_field not in parse_dates:
parse_dates.append(time_field)
for col_name, col_type in df.dtypes:
if parse_dates and col_name in parse_dates:
df = df.withColumn(col_name, funcs.col(col_name).cast("timestamp"))
if named_view:
df.createOrReplaceTempView(self.name)
return df
[docs] def to_dataframe(self):
kwargs = self.attributes.get("reader_args", {})
chunksize = self.attributes.get("chunksize")
if chunksize:
kwargs["chunksize"] = chunksize
return mlrun.store_manager.object(url=self.path).as_df(
parse_dates=self._parse_dates, **kwargs
)
[docs] def is_iterator(self):
return bool(self.attributes.get("chunksize"))
[docs]class ParquetSource(BaseSourceDriver):
"""
Reads Parquet file/dir as input source for a flow.
:parameter name: name of the source
:parameter path: path to Parquet file or directory
:parameter key_field: the column to be used as the key for events. Can be a list of keys.
:parameter time_field: Optional. Feature set's timestamp_key will be used if None. The results will be filtered
by this column and start_filter & end_filter.
:parameter start_filter: datetime. If not None, the results will be filtered by partitions and
'filter_column' > start_filter. Default is None
:parameter end_filter: datetime. If not None, the results will be filtered by partitions
'filter_column' <= end_filter. Default is None
:parameter schedule: string to configure scheduling of the ingestion job. For example `'*/30 * * * *'` will
cause the job to run every 30 minutes
:parameter start_time: filters out data before this time
:parameter end_time: filters out data after this time
:parameter attributes: additional parameters to pass to storey.
"""
kind = "parquet"
support_storey = True
support_spark = True
def __init__(
self,
name: str = "",
path: str = None,
attributes: Dict[str, str] = None,
key_field: str = None,
time_field: str = None,
schedule: str = None,
start_time: Optional[Union[datetime, str]] = None,
end_time: Optional[Union[datetime, str]] = None,
):
super().__init__(
name,
path,
attributes,
key_field,
time_field,
schedule,
start_time,
end_time,
)
@property
def start_time(self):
return self._start_time
@start_time.setter
def start_time(self, start_time):
self._start_time = self._convert_to_datetime(start_time)
@property
def end_time(self):
return self._end_time
@end_time.setter
def end_time(self, end_time):
self._end_time = self._convert_to_datetime(end_time)
@staticmethod
def _convert_to_datetime(time):
if time and isinstance(time, str):
if time.endswith("Z"):
return datetime.fromisoformat(time.replace("Z", "+00:00"))
return datetime.fromisoformat(time)
else:
return time
[docs] def to_step(
self,
key_field=None,
time_field=None,
start_time=None,
end_time=None,
context=None,
):
import storey
attributes = self.attributes or {}
if context:
attributes["context"] = context
return storey.ParquetSource(
paths=self.path,
key_field=self.key_field or key_field,
storage_options=self._get_store().get_storage_options(),
end_filter=self.end_time,
start_filter=self.start_time,
filter_column=self.time_field or time_field,
**attributes,
)
[docs] def get_spark_options(self):
return {
"path": store_path_to_spark(self.path),
"format": "parquet",
}
[docs] def to_dataframe(self):
kwargs = self.attributes.get("reader_args", {})
return mlrun.store_manager.object(url=self.path).as_df(
format="parquet", **kwargs
)
[docs]class BigQuerySource(BaseSourceDriver):
"""
Reads Google BigQuery query results as input source for a flow.
example::
# use sql query
query_string = "SELECT * FROM `the-psf.pypi.downloads20210328` LIMIT 5000"
source = BigQuerySource("bq1", query=query_string,
gcp_project="my_project",
materialization_dataset="dataviews")
# read a table
source = BigQuerySource("bq2", table="the-psf.pypi.downloads20210328", gcp_project="my_project")
:parameter name: source name
:parameter table: table name/path, cannot be used together with query
:parameter query: sql query string
:parameter materialization_dataset: for query with spark, The target dataset for the materialized view.
This dataset should be in same location as the view or the queried tables.
must be set to a dataset where the GCP user has table creation permission
:parameter chunksize: number of rows per chunk (default large single chunk)
:parameter key_field: the column to be used as the key for events. Can be a list of keys.
:parameter time_field: the column to be used for time filtering. Defaults to the feature set's timestamp_key.
:parameter schedule: string to configure scheduling of the ingestion job. For example `'*/30 * * * *'` will
cause the job to run every 30 minutes
:parameter start_time: filters out data before this time
:parameter end_time: filters out data after this time
:parameter gcp_project: google cloud project name
:parameter spark_options: additional spark read options
"""
kind = "bigquery"
support_storey = False
support_spark = True
def __init__(
self,
name: str = "",
table: str = None,
max_results_for_table: int = None,
query: str = None,
materialization_dataset: str = None,
chunksize: int = None,
key_field: str = None,
time_field: str = None,
schedule: str = None,
start_time=None,
end_time=None,
gcp_project: str = None,
spark_options: dict = None,
):
if query and table:
raise mlrun.errors.MLRunInvalidArgumentError(
"cannot specify both table and query args"
)
attrs = {
"query": query,
"table": table,
"max_results": max_results_for_table,
"chunksize": chunksize,
"gcp_project": gcp_project,
"spark_options": spark_options,
"materialization_dataset": materialization_dataset,
}
attrs = {key: value for key, value in attrs.items() if value is not None}
super().__init__(
name,
attributes=attrs,
key_field=key_field,
time_field=time_field,
schedule=schedule,
start_time=start_time,
end_time=end_time,
)
self._rows_iterator = None
def _get_credentials_string(self):
gcp_project = self.attributes.get("gcp_project", None)
key = "GCP_CREDENTIALS"
gcp_cred_string = os.getenv(key) or os.getenv(
SecretsStore.k8s_env_variable_name_for_secret(key)
)
return gcp_cred_string, gcp_project
def _get_credentials(self):
from google.oauth2 import service_account
gcp_cred_string, gcp_project = self._get_credentials_string()
if gcp_cred_string and not os.getenv("GOOGLE_APPLICATION_CREDENTIALS"):
gcp_cred_dict = json.loads(gcp_cred_string, strict=False)
credentials = service_account.Credentials.from_service_account_info(
gcp_cred_dict
)
return credentials, gcp_project or gcp_cred_dict["project_id"]
return None, gcp_project
[docs] def to_dataframe(self):
from google.cloud import bigquery
from google.cloud.bigquery_storage_v1 import BigQueryReadClient
def schema_to_dtypes(schema):
from mlrun.data_types.data_types import gbq_to_pandas_dtype
dtypes = {}
for field in schema:
dtypes[field.name] = gbq_to_pandas_dtype(field.field_type)
return dtypes
credentials, gcp_project = self._get_credentials()
bqclient = bigquery.Client(project=gcp_project, credentials=credentials)
query = self.attributes.get("query")
table = self.attributes.get("table")
chunksize = self.attributes.get("chunksize")
if query:
query_job = bqclient.query(query)
self._rows_iterator = query_job.result(page_size=chunksize)
dtypes = schema_to_dtypes(self._rows_iterator.schema)
if chunksize:
# passing bqstorage_client greatly improves performance
return self._rows_iterator.to_dataframe_iterable(
bqstorage_client=BigQueryReadClient(), dtypes=dtypes
)
else:
return self._rows_iterator.to_dataframe(dtypes=dtypes)
elif table:
table = self.attributes.get("table")
max_results = self.attributes.get("max_results")
rows = bqclient.list_rows(
table, page_size=chunksize, max_results=max_results
)
dtypes = schema_to_dtypes(rows.schema)
if chunksize:
# passing bqstorage_client greatly improves performance
return rows.to_dataframe_iterable(
bqstorage_client=BigQueryReadClient(), dtypes=dtypes
)
else:
return rows.to_dataframe(dtypes=dtypes)
else:
raise mlrun.errors.MLRunInvalidArgumentError(
"table or query args must be specified"
)
[docs] def is_iterator(self):
return bool(self.attributes.get("chunksize"))
[docs] def to_spark_df(self, session, named_view=False, time_field=None):
options = copy(self.attributes.get("spark_options", {}))
credentials, gcp_project = self._get_credentials_string()
if credentials:
options["credentials"] = b64encode(credentials.encode("utf-8")).decode(
"utf-8"
)
if gcp_project:
options["parentProject"] = gcp_project
query = self.attributes.get("query")
table = self.attributes.get("table")
materialization_dataset = self.attributes.get("materialization_dataset")
if not query and not table:
raise mlrun.errors.MLRunInvalidArgumentError(
"table or query args must be specified"
)
if query and not materialization_dataset:
raise mlrun.errors.MLRunInvalidArgumentError(
"materialization_dataset must be specified when running a query"
)
if query:
options["viewsEnabled"] = True
options["materializationDataset"] = materialization_dataset
options["query"] = query
elif table:
options["path"] = table
df = session.read.format("bigquery").load(**options)
if named_view:
df.createOrReplaceTempView(self.name)
return df
class SnowflakeSource(BaseSourceDriver):
"""
Reads Snowflake query results as input source for a flow.
The Snowflake cluster's password must be provided using the SNOWFLAKE_PASSWORD environment variable or secret.
See https://docs.mlrun.org/en/latest/store/datastore.html#storage-credentials-and-parameters for how to set secrets.
example::
source = SnowflakeSource(
"sf",
query="..",
url="...",
user="...",
database="...",
schema="...",
warehouse="...",
)
:parameter name: source name
:parameter key_field: the column to be used as the key for events. Can be a list of keys.
:parameter time_field: the column to be used for time filtering. Defaults to the feature set's timestamp_key.
:parameter schedule: string to configure scheduling of the ingestion job. For example `'*/30 * * * *'` will
cause the job to run every 30 minutes
:parameter start_time: filters out data before this time
:parameter end_time: filters out data after this time
:parameter query: sql query string
:parameter url: URL of the snowflake cluster
:parameter user: snowflake user
:parameter database: snowflake database
:parameter schema: snowflake schema
:parameter warehouse: snowflake warehouse
"""
kind = "snowflake"
support_spark = True
support_storey = False
def __init__(
self,
name: str = "",
key_field: str = None,
time_field: str = None,
schedule: str = None,
start_time=None,
end_time=None,
query: str = None,
url: str = None,
user: str = None,
database: str = None,
schema: str = None,
warehouse: str = None,
):
attrs = {
"query": query,
"url": url,
"user": user,
"database": database,
"schema": schema,
"warehouse": warehouse,
}
super().__init__(
name,
attributes=attrs,
key_field=key_field,
time_field=time_field,
schedule=schedule,
start_time=start_time,
end_time=end_time,
)
def _get_password(self):
key = "SNOWFLAKE_PASSWORD"
snowflake_password = os.getenv(key) or os.getenv(
SecretsStore.k8s_env_variable_name_for_secret(key)
)
if not snowflake_password:
raise mlrun.errors.MLRunInvalidArgumentError(
"No password provided. Set password using the SNOWFLAKE_PASSWORD "
"project secret or environment variable."
)
return snowflake_password
def get_spark_options(self):
return {
"format": "net.snowflake.spark.snowflake",
"query": self.attributes.get("query"),
"sfURL": self.attributes.get("url"),
"sfUser": self.attributes.get("user"),
"sfPassword": self._get_password(),
"sfDatabase": self.attributes.get("database"),
"sfSchema": self.attributes.get("schema"),
"sfWarehouse": self.attributes.get("warehouse"),
"application": "iguazio_platform",
}
class CustomSource(BaseSourceDriver):
kind = "custom"
support_storey = True
support_spark = False
def __init__(
self,
class_name: str = None,
name: str = "",
schedule: str = None,
**attributes,
):
attributes = attributes or {}
attributes["class_name"] = class_name
super().__init__(name, "", attributes, schedule=schedule)
def to_step(self, key_field=None, time_field=None, context=None):
attributes = copy(self.attributes)
class_name = attributes.pop("class_name")
class_object = get_class(class_name)
return class_object(context=context, **attributes)
class DataFrameSource:
"""
Reads data frame as input source for a flow.
:parameter key_field: the column to be used as the key for events. Can be a list of keys. Defaults to None
:parameter time_field: DEPRECATED.
:parameter context: MLRun context. Defaults to None
"""
support_storey = True
def __init__(
self, df, key_field=None, time_field=None, context=None, iterator=False
):
if time_field:
warnings.warn(
"DataFrameSource's time_field parameter has no effect. "
"It is deprecated in 1.3.0 and will be removed in 1.5.0",
FutureWarning,
)
self._df = df
if isinstance(key_field, str):
self.key_field = [key_field]
else:
self.key_field = key_field
self.context = context
self.iterator = iterator
def to_step(self, key_field=None, time_field=None, context=None):
import storey
return storey.DataframeSource(
dfs=self._df,
key_field=self.key_field or key_field,
context=self.context or context,
)
def to_dataframe(self):
return self._df
def is_iterator(self):
return self.iterator
class OnlineSource(BaseSourceDriver):
"""online data source spec"""
_dict_fields = [
"kind",
"name",
"path",
"attributes",
"key_field",
"time_field",
"online",
"workers",
]
kind = ""
def __init__(
self,
name: str = None,
path: str = None,
attributes: Dict[str, str] = None,
key_field: str = None,
time_field: str = None,
workers: int = None,
):
super().__init__(name, path, attributes, key_field, time_field)
self.online = True
self.workers = workers
def to_step(self, key_field=None, time_field=None, context=None):
import storey
source_class = (
storey.AsyncEmitSource
if config.datastore.async_source_mode == "enabled"
else storey.SyncEmitSource
)
source_args = self.attributes.get("source_args", {})
src_class = source_class(
context=context,
key_field=self.key_field,
full_event=True,
**source_args,
)
return src_class
def add_nuclio_trigger(self, function):
raise mlrun.errors.MLRunInvalidArgumentError(
"This source type is not supported with ingestion service yet"
)
[docs]class HttpSource(OnlineSource):
kind = "http"
[docs] def add_nuclio_trigger(self, function):
trigger_args = self.attributes.get("trigger_args")
if trigger_args:
function.with_http(**trigger_args)
return function
[docs]class StreamSource(OnlineSource):
"""Sets stream source for the flow. If stream doesn't exist it will create it"""
kind = "v3ioStream"
def __init__(
self,
name="stream",
group="serving",
seek_to="earliest",
shards=1,
retention_in_hours=24,
extra_attributes: dict = None,
**kwargs,
):
"""
Sets stream source for the flow. If stream doesn't exist it will create it
:param name: stream name. Default "stream"
:param group: consumer group. Default "serving"
:param seek_to: from where to consume the stream. Default earliest
:param shards: number of shards in the stream. Default 1
:param retention_in_hours: if stream doesn't exist and it will be created set retention time. Default 24h
:param extra_attributes: additional nuclio trigger attributes (key/value dict)
"""
attrs = {
"group": group,
"seek_to": seek_to,
"shards": shards,
"retention_in_hours": retention_in_hours,
"extra_attributes": extra_attributes or {},
}
super().__init__(name, attributes=attrs, **kwargs)
[docs] def add_nuclio_trigger(self, function):
endpoint, stream_path = parse_path(self.path)
v3io_client = v3io.dataplane.Client(endpoint=endpoint)
container, stream_path = split_path(stream_path)
res = v3io_client.create_stream(
container=container,
path=stream_path,
shard_count=self.attributes["shards"],
retention_period_hours=self.attributes["retention_in_hours"],
raise_for_status=v3io.dataplane.RaiseForStatus.never,
)
res.raise_for_status([409, 204])
function.add_v3io_stream_trigger(
self.path,
self.name,
self.attributes["group"],
self.attributes["seek_to"],
self.attributes["shards"],
extra_attributes=self.attributes.get("extra_attributes", {}),
)
return function
[docs]class KafkaSource(OnlineSource):
"""Sets kafka source for the flow"""
kind = "kafka"
def __init__(
self,
brokers=None,
topics=None,
group="serving",
initial_offset="earliest",
partitions=None,
sasl_user=None,
sasl_pass=None,
attributes=None,
**kwargs,
):
"""Sets kafka source for the flow
:param brokers: list of broker IP addresses
:param topics: list of topic names on which to listen.
:param group: consumer group. Default "serving"
:param initial_offset: from where to consume the stream. Default earliest
:param partitions: Optional, A list of partitions numbers for which the function receives events.
:param sasl_user: Optional, user name to use for sasl authentications
:param sasl_pass: Optional, password to use for sasl authentications
:param attributes: Optional, extra attributes to be passed to kafka trigger
"""
if isinstance(topics, str):
topics = [topics]
if isinstance(brokers, str):
brokers = [brokers]
attributes = {} if attributes is None else copy(attributes)
attributes["brokers"] = brokers
attributes["topics"] = topics
attributes["group"] = group
attributes["initial_offset"] = initial_offset
if partitions is not None:
attributes["partitions"] = partitions
sasl = attributes.pop("sasl", {})
if sasl_user and sasl_pass:
sasl["enabled"] = True
sasl["user"] = sasl_user
sasl["password"] = sasl_pass
if sasl:
attributes["sasl"] = sasl
super().__init__(attributes=attributes, **kwargs)
[docs] def to_dataframe(self):
raise mlrun.MLRunInvalidArgumentError(
"KafkaSource does not support batch processing"
)
[docs] def add_nuclio_trigger(self, function):
extra_attributes = copy(self.attributes)
partitions = extra_attributes.pop("partitions", None)
trigger = KafkaTrigger(
brokers=extra_attributes.pop("brokers"),
topics=extra_attributes.pop("topics"),
partitions=partitions,
consumer_group=extra_attributes.pop("group"),
initial_offset=extra_attributes.pop("initial_offset"),
extra_attributes=extra_attributes,
)
func = function.add_trigger("kafka", trigger)
replicas = 1 if not partitions else len(partitions)
func.spec.min_replicas = replicas
func.spec.max_replicas = replicas
return func
class SQLSource(BaseSourceDriver):
kind = "sqldb"
support_storey = True
support_spark = False
def __init__(
self,
name: str = "",
chunksize: int = None,
key_field: str = None,
time_field: str = None,
schedule: str = None,
start_time: Optional[Union[datetime, str]] = None,
end_time: Optional[Union[datetime, str]] = None,
db_url: str = None,
table_name: str = None,
spark_options: dict = None,
time_fields: List[str] = None,
):
"""
Reads SqlDB as input source for a flow.
example::
db_path = "mysql+pymysql://<username>:<password>@<host>:<port>/<db_name>"
source = SqlDBSource(
collection_name='source_name', db_path=self.db, key_field='key'
)
:param name: source name
:param chunksize: number of rows per chunk (default large single chunk)
:param key_field: the column to be used as the key for the collection.
:param time_field: the column to be parsed as timestamp for events. Defaults to None
:param start_time: filters out data before this time
:param end_time: filters out data after this time
:param schedule: string to configure scheduling of the ingestion job.
For example '*/30 * * * *' will
cause the job to run every 30 minutes
:param db_url: url string connection to sql database.
If not set, the MLRUN_SQL__URL environment variable will be used.
:param table_name: the name of the collection to access,
from the current database
:param spark_options: additional spark read options
:param time_fields : all the field to be parsed as timestamp.
"""
db_url = db_url or mlrun.mlconf.sql.url
if db_url is None:
raise mlrun.errors.MLRunInvalidArgumentError(
"cannot specify without db_path arg or secret MLRUN_SQL__URL"
)
attrs = {
"chunksize": chunksize,
"spark_options": spark_options,
"table_name": table_name,
"db_path": db_url,
"time_fields": time_fields,
}
attrs = {key: value for key, value in attrs.items() if value is not None}
super().__init__(
name,
attributes=attrs,
key_field=key_field,
time_field=time_field,
schedule=schedule,
start_time=start_time,
end_time=end_time,
)
def to_dataframe(self):
import sqlalchemy as db
query = self.attributes.get("query", None)
db_path = self.attributes.get("db_path")
table_name = self.attributes.get("table_name")
if not query:
query = f"SELECT * FROM {table_name}"
if table_name and db_path:
engine = db.create_engine(db_path)
with engine.connect() as con:
return pd.read_sql(
query,
con=con,
chunksize=self.attributes.get("chunksize"),
parse_dates=self.attributes.get("time_fields"),
)
else:
raise mlrun.errors.MLRunInvalidArgumentError(
"table_name and db_name args must be specified"
)
def to_step(self, key_field=None, time_field=None, context=None):
import storey
attributes = self.attributes or {}
if context:
attributes["context"] = context
return storey.SQLSource(
key_field=self.key_field or key_field,
time_field=self.time_field or time_field,
end_filter=self.end_time,
start_filter=self.start_time,
filter_column=self.time_field or time_field,
**attributes,
)
pass
def is_iterator(self):
return bool(self.attributes.get("chunksize"))
# map of sources (exclude DF source which is not serializable)
source_kind_to_driver = {
"": BaseSourceDriver,
CSVSource.kind: CSVSource,
ParquetSource.kind: ParquetSource,
HttpSource.kind: HttpSource,
StreamSource.kind: StreamSource,
KafkaSource.kind: KafkaSource,
CustomSource.kind: CustomSource,
BigQuerySource.kind: BigQuerySource,
SnowflakeSource.kind: SnowflakeSource,
SQLSource.kind: SQLSource,
}
