When encountering the error 2202G: Invalid Tablesample Repeat
from a PostgreSQL database, the immediate action you should take is:
TABLESAMPLE
clause. This error typically indicates an issue with how the TABLESAMPLE
method is used, possibly with the REPEATABLE
argument.TABLESAMPLE
Syntax: Ensure the syntax of the TABLESAMPLE
clause is correct. The syntax should follow the pattern:SELECT * FROM table_name TABLESAMPLE sampling_method (percentage) REPEATABLE (seed)
sampling_method
is valid (e.g., BERNOULLI
, SYSTEM
), the percentage
is properly defined, and the seed
in the REPEATABLE
argument is a positive integer.REPEATABLE
argument, ensure the seed value provided is a positive integer. A negative value or a value that is not an integer can cause this error.REPEATABLE
: If you're unsure about the REPEATABLE
seed value, try running the query without the REPEATABLE
argument to check if the error persists. This can help narrow down the issue to the REPEATABLE
argument:SELECT * FROM table_name TABLESAMPLE sampling_method (percentage)
TABLESAMPLE
and the REPEATABLE
keyword for additional insights.Remember, without a database administrator, proceed with caution and ensure you have the proper backups or permissions before making significant changes to the database or its queries.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)