def load(self, *args, **kwargs):
with get_postgres() as conn:
with conn.cursor() as cursor:
try:
with open(constants.LOCAL_STORAGE + self.file,
"r") as upload_file:
# cursor.copy_from(upload_file,self.table_name,sep='\t')
# conn.commit()
cursor.copy_expert(
"COPY {} from stdin with csv header delimiter '\t'"
.format(self.table_name), upload_file)
conn.commit()
upload_error = False
for msg in conn.notices:
if '{}'.format(self.table_name) not in msg:
continue
upload_error = True if 'stl_load_errors' in msg else upload_error
if 'record' in msg:
try:
rows_cnt = int(re.findall(r'\d+', msg)[0])
except (IndexError, ValueError):
pass
if upload_error:
self.show_redshift_error(conn, rollback=False)
return
except psycopg2.InternalError as ex:
raise ex
def _get_parameters(self):
with get_postgres() as conn:
with conn.cursor(
cursor_factory=psycopg2.extras.RealDictCursor) as cursor:
cursor.execute("""
SELECT * FROM public.indeed_etl_jobs where is_active = TRUE
""")
for query in cursor.fetchall():
yield query
def _get_open_jobs(self):
with get_postgres() as conn:
with conn.cursor(
cursor_factory=psycopg2.extras.RealDictCursor) as cursor:
cursor.execute("""
select distinct job_key
from public.indeed_jobs_duration
where job_expired = '1900-01-01'
and job_no_api = '1900-01-01'
""")
for query in cursor.fetchall():
yield query
def get_tables_list(self, scheme='public'):
with get_postgres() as conn:
with conn.cursor(
cursor_factory=psycopg2.extras.DictCursor) as cursor:
cursor.execute(
"""
select
distinct("tablename") as tablename
from
pg_table_def
where
"schemaname"=%s;
""", (scheme, ))
return [row['tablename'] for row in cursor.fetchall()]
def exec_analyze_table(self, table_name, scheme='public'):
"""
Perform the ANALYZE operation on a given table
"""
# Detect if scheme is present in a table name
if '.' not in table_name:
table_name = '"{}"."{}"'.format(scheme, table_name)
analyze_query = 'analyze {}'.format(table_name)
with get_postgres() as conn:
with conn.cursor() as cursor:
return self.exec_query(
cursor,
analyze_query,
query_description='ANALYZE {}'.format(table_name))
def table_exists(self, table_name, scheme='public'):
with get_postgres() as conn:
with conn.cursor(
cursor_factory=psycopg2.extras.DictCursor) as cursor:
cursor.execute(
"""
select
distinct("tablename") as tablename
from
pg_table_def
where
"tablename"=%s and
"schemaname"=%s;
""", (table_name, scheme))
return len(cursor.fetchall()) > 0
def rebuild_stage_table(self, recreate_table=True):
"""
Rebuild appropriate ETL stage table
"""
with get_postgres() as conn:
with conn.cursor() as cursor:
if recreate_table:
cursor.execute("drop table if exists {} cascade".format(
self.table_name))
cursor.execute(self.table_ddl)
conn.commit()
return
if not runner.table_exists(self.table_name):
cursor.execute(self.table_ddl)
conn.commit()
return
def exec_sql_scripts(self, paths, show_error=True, explicit_commit=False):
"""
Execute multiple SQL scripts one by one
"""
affected_rows = 0
with get_postgres() as conn:
for path in paths:
sql_query = self.read_query(path)
with conn.cursor(
cursor_factory=psycopg2.extras.DictCursor) as cursor:
affected_rows += self.exec_query(cursor,
sql_query,
show_error=show_error,
query_description=path)
if explicit_commit:
conn.commit()
return affected_rows
def exec_analyze_tables(self, table_names, scheme='public'):
"""
Perform the ANALYZE operation on multiple tables
"""
analyze_query = 'analyze {}'
affected_rows = 0
with get_postgres() as conn:
with conn.cursor() as cursor:
for table_name in table_names:
# Detect if scheme is present in a table name
if '.' not in table_name:
table_name = '"{}"."{}"'.format(scheme, table_name)
affected_rows += self.exec_query(
cursor,
analyze_query.format(table_name),
query_description='ANALYZE {}'.format(table_name))
return affected_rows
def exec_sql_script(self,
path,
params=None,
show_error=True,
explicit_commit=False):
"""
Execute a single SQL script
"""
sql_query = self.read_query(path)
with get_postgres() as conn:
with conn.cursor(
cursor_factory=psycopg2.extras.DictCursor) as cursor:
result = self.exec_query(cursor,
sql_query,
params,
show_error=show_error,
query_description=path)
if explicit_commit:
conn.commit()
return result
def main(*args, **kwargs):
extractor = IndeedDuration()
with get_postgres() as conn:
with conn.cursor(
cursor_factory=psycopg2.extras.RealDictCursor) as cursor:
for job_key, expired, api_active in extractor.extract():
print(job_key, expired, api_active)
if expired:
cursor.execute(f"""
update public.indeed_jobs_duration
set job_expired = current_date
where job_key = '{job_key}'
""")
elif not api_active:
cursor.execute(f"""
update public.indeed_jobs_duration
set job_no_api = current_date
where job_key = '{job_key}'
""")
conn.commit()
