table lineitem defined distribution keys : l_orderkey; request distribution columns : l_returnflag, l_linestatus; shuffle data skew in different shards! max rows is 20, min rows is 0 Query id:[300200511xxxx] ===cost=== Total cost:[2505] ms Optimizer cost:[47] ms Init gangs cost:...
Formatting the execution plan The format parameter for the functions in the DBMS_XPLAN package is highly customizable and can display as little (high-level) or as much (low-level) details as required or desired in the plan output. There are three pre-defined formats available: BASIC The...
Type of output data. The type of output data is either "C", "N", or "X". It is the field that contains the character output ("C") or the field that contains the numeric output ("N"). It tells the user which field to look in for the output data. A value of "X" indicates...
• All built-in and user-defined data types are objects • All operations are performed using the message passing techniques Depending on the extent to which they support OO concepts, the OO languages are classified into several categories which are listed here. ...
Data in PLAN_TABLE is in a session-level lifecycle. Sessions are isolated from users, and therefore users can only view the data of the current session and current user. PLAN_TABLE cannot be joined with GDS foreign tables. For a query that cannot be pushed down, only such information as ...
WHO (2022) defined mental health as "a state of mental well-being that enables people to cope with the stresses of life … an integral component of health and well-being … ." In fact, well-being stud- ies are often intertwined with general mental health studies due to the lack of ...
Airflow project contains some pre-defined virtualenv definitions in ``pyproject.toml`` that can be easily used by hatch to create your local venvs. This is not necessary for you to develop and test Airflow, but it is a convenient way to manage your local Python versions and virtualenvs. ...
Understanding the relationship between urban form and structure and spatial inequality of property flood risk has been a longstanding challenge in urban planning and emergency management. Here we explore eight urban form and structure features to explain
In the present study, volunteers and parents were compared on several aspects of implementation, based on self-reported and observational data: intensity (number of PR training sessions; self-reported), average duration of training sessions (self-reported), timing of a typical training session (obse...
Information system refers to the system used for gathering, storing, processing data, and distributing the processed information. Its components include software, users of the information system, hardware, connections of the computer system, and people....