51.77. pg_prepared_xacts

51.77. `pg_prepared_xacts`
Prev | Up | Chapter 51. System Catalogs | Home | Next

## 51.77. `pg_prepared_xacts`

The view `pg_prepared_xacts` displays information about transactions that are currently prepared for two-phase commit (see PREPARE TRANSACTION for details).

`pg_prepared_xacts` contains one row per prepared transaction. An entry is removed when the transaction is committed or rolled back.

Table 51.78. `pg_prepared_xacts` Columns

Column Type Description
`transaction` `xid` Numeric transaction identifier of the prepared transaction
`gid` `text` Global transaction identifier that was assigned to the transaction
`prepared` `timestamptz` Time at which the transaction was prepared for commit
`owner` `name` (references `pg_authid`.`rolname`) Name of the user that executed the transaction
`database` `name` (references `pg_database`.`datname`) Name of the database in which the transaction was executed

When the `pg_prepared_xacts` view is accessed, the internal transaction manager data structures are momentarily locked, and a copy is made for the view to display. This ensures that the view produces a consistent set of results, while not blocking normal operations longer than necessary. Nonetheless there could be some impact on database performance if this view is frequently accessed.

Prev | Up | Next
51.76. `pg_prepared_statements` | Home | 51.78. `pg_publication_tables`