Source code for airflow.contrib.operators.sqoop_operator

# -*- coding: utf-8 -*-
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This module contains a sqoop 1 operator
import os
import signal

from airflow.contrib.hooks.sqoop_hook import SqoopHook
from airflow.exceptions import AirflowException
from airflow.models import BaseOperator
from airflow.utils.decorators import apply_defaults

[docs]class SqoopOperator(BaseOperator): """ Execute a Sqoop job. Documentation for Apache Sqoop can be found here: """ template_fields = ('conn_id', 'cmd_type', 'table', 'query', 'target_dir', 'file_type', 'columns', 'split_by', 'where', 'export_dir', 'input_null_string', 'input_null_non_string', 'staging_table', 'enclosed_by', 'escaped_by', 'input_fields_terminated_by', 'input_lines_terminated_by', 'input_optionally_enclosed_by', 'properties', 'extra_import_options', 'driver', 'extra_export_options', 'hcatalog_database', 'hcatalog_table',) ui_color = '#7D8CA4' @apply_defaults def __init__(self, conn_id='sqoop_default', cmd_type='import', table=None, query=None, target_dir=None, append=None, file_type='text', columns=None, num_mappers=None, split_by=None, where=None, export_dir=None, input_null_string=None, input_null_non_string=None, staging_table=None, clear_staging_table=False, enclosed_by=None, escaped_by=None, input_fields_terminated_by=None, input_lines_terminated_by=None, input_optionally_enclosed_by=None, batch=False, direct=False, driver=None, verbose=False, relaxed_isolation=False, properties=None, hcatalog_database=None, hcatalog_table=None, create_hcatalog_table=False, extra_import_options=None, extra_export_options=None, *args, **kwargs): """ :param conn_id: str :param cmd_type: str specify command to execute "export" or "import" :param table: Table to read :param query: Import result of arbitrary SQL query. Instead of using the table, columns and where arguments, you can specify a SQL statement with the query argument. Must also specify a destination directory with target_dir. :param target_dir: HDFS destination directory where the data from the rdbms will be written :param append: Append data to an existing dataset in HDFS :param file_type: "avro", "sequence", "text" Imports data to into the specified format. Defaults to text. :param columns: <col,col,col> Columns to import from table :param num_mappers: Use n mapper tasks to import/export in parallel :param split_by: Column of the table used to split work units :param where: WHERE clause to use during import :param export_dir: HDFS Hive database directory to export to the rdbms :param input_null_string: The string to be interpreted as null for string columns :param input_null_non_string: The string to be interpreted as null for non-string columns :param staging_table: The table in which data will be staged before being inserted into the destination table :param clear_staging_table: Indicate that any data present in the staging table can be deleted :param enclosed_by: Sets a required field enclosing character :param escaped_by: Sets the escape character :param input_fields_terminated_by: Sets the input field separator :param input_lines_terminated_by: Sets the input end-of-line character :param input_optionally_enclosed_by: Sets a field enclosing character :param batch: Use batch mode for underlying statement execution :param direct: Use direct export fast path :param driver: Manually specify JDBC driver class to use :param verbose: Switch to more verbose logging for debug purposes :param relaxed_isolation: use read uncommitted isolation level :param hcatalog_database: Specifies the database name for the HCatalog table :param hcatalog_table: The argument value for this option is the HCatalog table :param create_hcatalog_table: Have sqoop create the hcatalog table passed in or not :param properties: additional JVM properties passed to sqoop :param extra_import_options: Extra import options to pass as dict. If a key doesn't have a value, just pass an empty string to it. Don't include prefix of -- for sqoop options. :param extra_export_options: Extra export options to pass as dict. If a key doesn't have a value, just pass an empty string to it. Don't include prefix of -- for sqoop options. """ super(SqoopOperator, self).__init__(*args, **kwargs) self.conn_id = conn_id self.cmd_type = cmd_type self.table = table self.query = query self.target_dir = target_dir self.append = append self.file_type = file_type self.columns = columns self.num_mappers = num_mappers self.split_by = split_by self.where = where self.export_dir = export_dir self.input_null_string = input_null_string self.input_null_non_string = input_null_non_string self.staging_table = staging_table self.clear_staging_table = clear_staging_table self.enclosed_by = enclosed_by self.escaped_by = escaped_by self.input_fields_terminated_by = input_fields_terminated_by self.input_lines_terminated_by = input_lines_terminated_by self.input_optionally_enclosed_by = input_optionally_enclosed_by self.batch = batch = direct self.driver = driver self.verbose = verbose self.relaxed_isolation = relaxed_isolation self.hcatalog_database = hcatalog_database self.hcatalog_table = hcatalog_table self.create_hcatalog_table = create_hcatalog_table = properties self.extra_import_options = extra_import_options or {} self.extra_export_options = extra_export_options or {}
[docs] def execute(self, context): """ Execute sqoop job """ self.hook = SqoopHook( conn_id=self.conn_id, verbose=self.verbose, num_mappers=self.num_mappers, hcatalog_database=self.hcatalog_database, hcatalog_table=self.hcatalog_table, ) if self.cmd_type == 'export': self.hook.export_table( table=self.table, export_dir=self.export_dir, input_null_string=self.input_null_string, input_null_non_string=self.input_null_non_string, staging_table=self.staging_table, clear_staging_table=self.clear_staging_table, enclosed_by=self.enclosed_by, escaped_by=self.escaped_by, input_fields_terminated_by=self.input_fields_terminated_by, input_lines_terminated_by=self.input_lines_terminated_by, input_optionally_enclosed_by=self.input_optionally_enclosed_by, batch=self.batch, relaxed_isolation=self.relaxed_isolation, extra_export_options=self.extra_export_options) elif self.cmd_type == 'import': # add create hcatalog table to extra import options if option passed # if new params are added to constructor can pass them in here # so don't modify sqoop_hook for each param if self.create_hcatalog_table: self.extra_import_options['create-hcatalog-table'] = '' if self.table and self.query: raise AirflowException( 'Cannot specify query and table together. Need to specify either or.' ) if self.table: self.hook.import_table( table=self.table, target_dir=self.target_dir, append=self.append, file_type=self.file_type, columns=self.columns, split_by=self.split_by, where=self.where,, driver=self.driver, extra_import_options=self.extra_import_options) elif self.query: self.hook.import_query( query=self.query, target_dir=self.target_dir, append=self.append, file_type=self.file_type, split_by=self.split_by,, driver=self.driver, extra_import_options=self.extra_import_options) else: raise AirflowException( "Provide query or table parameter to import using Sqoop" ) else: raise AirflowException("cmd_type should be 'import' or 'export'")
def on_kill(self):'Sending SIGTERM signal to bash process group') os.killpg(os.getpgid(, signal.SIGTERM)