man > DISCARD(8postfix)

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📛 NAME

DISCARD — discard session state

🚀 Quick Reference

Use Case	Command	Description
🔄 Reset all session state	DISCARD ALL	Releases all temporary resources and resets session to initial state
🗺️ Clear cached query plans	DISCARD PLANS	Forces re‑planning for prepared statements
🔢 Reset sequence caches	DISCARD SEQUENCES	Clears currval/lastval and preallocated sequence values
🗑️ Drop temporary tables	DISCARD TEMPORARY (or TEMP)	Drops all temp tables created in the current session

📋 SYNOPSIS

DISCARD { ALL | PLANS | SEQUENCES | TEMPORARY | TEMP }

📖 DESCRIPTION

DISCARD releases internal resources associated with a database session. This command is useful for partially or fully resetting the session’s state. There are several subcommands to release different types of resources; the DISCARD ALL variant subsumes all the others, and also resets additional state.

⚙️ PARAMETERS

🗺️ PLANS

Releases all cached query plans, forcing re‑planning to occur the next time the associated prepared statement is used.

🔢 SEQUENCES

Discards all cached sequence‑related state, including currval()/lastval() information and any preallocated sequence values that have not yet been returned by nextval(). (See CREATE SEQUENCE for a description of preallocated sequence values.)

🗑️ TEMPORARY or TEMP

Drops all temporary tables created in the current session.

🔄 ALL

Releases all temporary resources associated with the current session and resets the session to its initial state. Currently, this has the same effect as executing the following sequence of statements:

CLOSE ALL;
SET SESSION AUTHORIZATION DEFAULT;
RESET ALL;
DEALLOCATE ALL;
UNLISTEN *;
SELECT pg_advisory_unlock_all();
DISCARD PLANS;
DISCARD TEMP;
DISCARD SEQUENCES;

📝 NOTES

DISCARD ALL cannot be executed inside a transaction block.

🌐 COMPATIBILITY

DISCARD is a PostgreSQL extension.

📛 NAME 🚀 Quick Reference 📋 SYNOPSIS 📖 DESCRIPTION ⚙️ PARAMETERS 📝 NOTES 🌐 COMPATIBILITY