View Detailed Partition Information for the Orders Table

Query Partition Metadata

Write a PostgreSQL query to list all partitions under the Orders table.

Solution:

-- Retrieve list of partitions for the Orders table
SELECT inhrelid::regclass AS partition_name  -- Convert partition OID to a human-readable name
FROM pg_inherits                           -- Query the system catalog table that stores partition inheritance relationships
WHERE inhparent = 'Orders'::regclass;      -- Filter to include only partitions whose parent table is Orders

Explanation:

• Purpose of the Query:
• Displays all partitions linked to the parent table Orders.
• Key Components:
• pg_inherits: System catalog table storing partition relationships.
• Real-World Application:
• Helps in managing partitions dynamically.

Notes:

• Useful before adding or removing partitions.

For more Practice: Solve these Related Problems:

• Write a PostgreSQL query to list all partitions of a table along with their corresponding parent table and inheritance details.
• Write a PostgreSQL query to retrieve partition metadata including partition names, boundaries, and row counts from system catalogs.
• Write a PostgreSQL query to display the creation dates of all partitions for a given partitioned table.
• Write a PostgreSQL query to list partitions along with their storage parameters and last vacuum timestamps.

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Previous PostgreSQL Exercise: Querying Default Partition Data.