def discover(self, request):
schema_name = request.GET.get('schema')
table_name = request.GET.get('table')
if schema_name and table_name:
adapter = DatabaseAdapter()
table_metadata = adapter.fetch_table(schema_name, table_name)
table_metadata['nrows'] = adapter.fetch_nrows(
schema_name, table_name)
table_metadata['size'] = adapter.fetch_size(
schema_name, table_name)
return Response([table_metadata])
else:
return Response([])
def run_database_query_task(job_id):
# always import daiquiri packages inside the task
from daiquiri.core.adapter import DatabaseAdapter
from daiquiri.query.models import QueryJob
from daiquiri.query.utils import get_quota, get_job_sources, get_job_columns, ingest_uploads
from daiquiri.stats.models import Record
# get logger
logger = logging.getLogger(__name__)
# get the job object from the database
job = QueryJob.objects.get(pk=job_id)
if job.phase == job.PHASE_QUEUED:
# get the adapter with the database specific functions
adapter = DatabaseAdapter()
# create the database of the user if it not already exists
try:
adapter.create_user_schema_if_not_exists(job.schema_name)
except OperationalError as e:
job.phase = job.PHASE_ERROR
job.error_summary = str(e)
job.save()
return job.phase
# check if the quota is exceeded
if QueryJob.objects.get_size(job.owner) > get_quota(job.owner):
job.phase = job.PHASE_ERROR
job.error_summary = str(
_('Quota is exceeded. Please remove some of your jobs.'))
job.save()
return job.phase
# set database and start time
job.pid = adapter.fetch_pid()
job.actual_query = adapter.build_query(job.schema_name, job.table_name,
job.native_query, job.timeout,
job.max_records)
job.phase = job.PHASE_EXECUTING
job.start_time = now()
job.save()
logger.info('job %s started' % job.id)
# get the actual query and submit the job to the database
try:
ingest_uploads(job.uploads, job.owner)
# this is where the work ist done (and the time is spend)
adapter.submit_query(job.actual_query)
except (ProgrammingError, InternalError, ValueError) as e:
job.phase = job.PHASE_ERROR
job.error_summary = str(e)
logger.info('job %s failed (%s)' % (job.id, job.error_summary))
except OperationalError as e:
# load the job again and check if the job was killed
job = QueryJob.objects.get(pk=job_id)
if job.phase != job.PHASE_ABORTED:
job.phase = job.PHASE_ERROR
job.error_summary = str(e)
logger.info('job %s failed (%s)' % (job.id, job.error_summary))
else:
# get additional information about the completed job
job.phase = job.PHASE_COMPLETED
logger.info('job %s completed' % job.id)
finally:
# get timing and save the job object
job.end_time = now()
# get additional information about the completed job
if job.phase == job.PHASE_COMPLETED:
job.nrows = adapter.count_rows(job.schema_name, job.table_name)
job.size = adapter.fetch_size(job.schema_name, job.table_name)
# fetch the metadata for used tables
job.metadata['sources'] = get_job_sources(job)
# fetch the metadata for the columns and fetch additional metadata from the metadata store
job.metadata['columns'] = get_job_columns(job)
# remove unneeded metadata
job.metadata.pop('display_columns', None)
job.metadata.pop('tables', None)
# create a stats record for this job
Record.objects.create(time=job.end_time,
resource_type='QUERY',
resource={
'job_id': job.id,
'job_type': job.job_type,
'query': job.query,
'query_language': job.query_language,
'sources':
job.metadata.get('sources', [])
},
client_ip=job.client_ip,
user=job.owner)
job.save()
return job.phase
def run_database_ingest_task(job_id, file_path):
from daiquiri.core.adapter import DatabaseAdapter
from daiquiri.query.models import QueryJob
from daiquiri.stats.models import Record
from daiquiri.query.utils import get_quota, ingest_table
# get logger
logger = logging.getLogger(__name__)
# get the job object from the database
job = QueryJob.objects.get(pk=job_id)
if job.phase == job.PHASE_QUEUED:
# get the adapter with the database specific functions
adapter = DatabaseAdapter()
# create the database of the user if it not already exists
try:
adapter.create_user_schema_if_not_exists(job.schema_name)
except OperationalError as e:
job.phase = job.PHASE_ERROR
job.error_summary = str(e)
job.save()
return job.phase
# check if the quota is exceeded
if QueryJob.objects.get_size(job.owner) > get_quota(job.owner):
job.phase = job.PHASE_ERROR
job.error_summary = str(
_('Quota is exceeded. Please remove some of your jobs.'))
job.save()
return job.phase
# set database and start time
job.pid = adapter.fetch_pid()
job.phase = job.PHASE_EXECUTING
job.start_time = now()
job.save()
logger.info('job %s started' % job.id)
# create the table and insert the data
try:
columns = ingest_table(job.schema_name, job.table_name, file_path)
except (ProgrammingError, InternalError, ValueError) as e:
job.phase = job.PHASE_ERROR
job.error_summary = str(e)
logger.info('job %s failed (%s)' % (job.id, job.error_summary))
except OperationalError as e:
# load the job again and check if the job was killed
job = QueryJob.objects.get(pk=job_id)
if job.phase != job.PHASE_ABORTED:
job.phase = job.PHASE_ERROR
job.error_summary = str(e)
logger.info('job %s failed (%s)' % (job.id, job.error_summary))
else:
# get additional information about the completed job
job.phase = job.PHASE_COMPLETED
logger.info('job %s completed' % job.id)
finally:
# get timing and save the job object
job.end_time = now()
# get additional information about the completed job
if job.phase == job.PHASE_COMPLETED:
job.nrows = adapter.count_rows(job.schema_name, job.table_name)
job.size = adapter.fetch_size(job.schema_name, job.table_name)
# store the metadata for the columns from the VOTable
job.metadata = {'columns': columns}
# create a stats record for this job
Record.objects.create(time=job.end_time,
resource_type='UPLOAD',
resource={
'job_id': job.id,
'job_type': job.job_type,
},
client_ip=job.client_ip,
user=job.owner)
job.save()
return job.phase