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jblitzar
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github-python-corpus

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# execute alter table to change data type
for sql in modify_sqls:
self.execute_sql(database_name, sql)
# execute alter table to add columns
for sql in alter_sqls:
self.execute_sql(database_name, sql)
# create new tables
for child_table_name, columns in new_table_columns.iteritems():
sql = "create table `%s` (%s) ROW FORMAT SERDE 'com.cloudera.hive.serde.JSONSerDe' " % (child_table_name, ",".join(columns))
self.execute_sql(database_name, sql)
return table_names + new_table_columns.keys()
def delete_table(self, database_name, table_name):
sql = "drop table if exists `%s`" % (table_name)
self.execute_sql(database_name, sql, False)
child_table_names = self.list_tables(database_name, table_name)
for child_table_name in child_table_names:
sql = "drop table if exists `%s`" % (child_table_name)
self.execute_sql(database_name, sql, False)
def get_num_rows(self, database_name, table_name):
sql = "select count(*) from `%s`" % (table_name)
r = self.execute_sql(database_name, sql, True)
return r[0][0]
def table_exists(self, database_name, table_name):
r = self.execute_sql(database_name, "show tables", True)
for row in r:
if row[0] == table_name:
return True
return False
def get_table_schema(self, database_name, table_name):
sql = "desc %s" % (table_name)
r = self.execute_sql(database_name, sql, True)
fields = []
for row in r:
d = {}
if 'string' in row[1]:
d['data_type'] = 'string'
elif 'float' in row[1] or 'double' in row[1]:
d['data_type'] = 'float'
elif 'int' in row[1] or 'bigint' in row[1]:
d['data_type'] = 'integer'
elif 'timestamp' in row[1]:
d['data_type'] = 'timestamp'
elif 'boolean' in row[1]:
d['data_type'] = 'boolean'
d['key'] = row[0]
d['mode'] = 'nullable'
fields.append(d)
return fields
def get_job_state(self, job_id):
job_state = None
job_result = None
job_error_message = None
job_error_reason = None
job_output_rows = 0
return (job_state, job_result, job_error_message, job_error_reason, job_output_rows)
def list_tables(self, database_name, table_prefix):
sql = "show tables"
r = self.execute_sql(database_name, sql, True)
output = []
for row in r:
if row[0].startswith(table_prefix):
output.append(row[0])
return output
def load_table(self, database_name, table_name, file_path):
sql = "load data inpath '%s*' into table `%s`" % (file_path, table_name)
self.execute_sql(database_name, sql, fetch_result = False)
def query(self, database_name, query):
result = self.execute_sql(database_name, query, True)
output = {}
output['rows'] = []
for r in result:
f = []
for i in r:
f.append({"v": i})
output['rows'].append({"f": f})
return output
# <FILESEP>