FUSE_VACUUM_TEMPORARY_TABLE

Introduced or updated: v1.2.666

Overview

Temporary tables are typically cleaned up automatically at session end (details in CREATE TEMP TABLE). However, this process can fail due to events like query node crashes or abnormal session terminations, leaving orphaned temporary files.

FUSE_VACUUM_TEMPORARY_TABLE() manually removes these leftover files to reclaim storage.

When to use this function:

• After known system failures or abnormal session terminations.
• If you suspect orphaned temporary data is consuming storage.
• As a periodic maintenance task in environments prone to such issues.

Operational Safety

The FUSE_VACUUM_TEMPORARY_TABLE() function is designed to be a safe and reliable operation.

• Targets Only Temporary Data: It specifically identifies and removes only orphaned data and metadata files that belong to temporary tables.
• No Impact on Regular Tables: The function will not affect any regular, persistent tables or their data. Its scope is strictly limited to the cleanup of unreferenced temporary table remnants.

Syntax

FUSE_VACUUM_TEMPORARY_TABLE();

Examples

SELECT * FROM FUSE_VACUUM_TEMPORARY_TABLE();

┌────────┐
│ result │
├────────┤
│ Ok     │
└────────┘