Non-Locking Index Creation on hire_date Column

Creating an Index Concurrently in PostgreSQL

Write a PostgreSQL query to create an index concurrently to avoid locking the table during creation.

Solution:

-- Specify the action to create an index without locking writes.
CREATE INDEX CONCURRENTLY idx_employees_hire_date 
-- Define the target table and column for the index.
ON Employees(hire_date);

Explanation:

• Purpose of the Query:
• To build the index without preventing other database operations (like INSERTs or UPDATEs).
• Key Components:
• CONCURRENTLY : Allows index creation without a heavy lock on the table.
• idx_employees_hire_date and ON Employees(hire_date) : Define the index name and target column.

Notes:

• Using CONCURRENTLY is recommended in production environments for large tables.
• This method may take longer but ensures minimal disruption.

For more Practice: Solve these Related Problems:

• Write a PostgreSQL query to create an index concurrently on the "email" column in the "Subscribers" table.
• Write a PostgreSQL query to create an index concurrently on the "updated_at" column in the "Logs" table.
• Write a PostgreSQL query to create an index concurrently on the "order_id" column in the "OrderDetails" table.
• Write a PostgreSQL query to create an index concurrently on the "ip_address" column in the "AccessLogs" table.

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous PostgreSQL Exercise: Creating a Composite Index in PostgreSQL.
Next PostgreSQL Exercise: Dropping an Index in PostgreSQL.