Documentazione di PostgreSQL 9.0 > Internal > System Catalogs > pg_cursors
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45.47. pg_cursors

The pg_cursors view lists the cursors that are currently available. Cursors can be defined in several ways:

The pg_cursors view displays cursors created by any of these means. Cursors only exist for the duration of the transaction that defines them, unless they have been declared WITH HOLD. Therefore non-holdable cursors are only present in the view until the end of their creating transaction.

[Nota]

Nota

Cursors are used internally to implement some of the components of PostgreSQL™, such as procedural languages. Therefore, the pg_cursors view might include cursors that have not been explicitly created by the user.

Tabella 45.48. pg_cursors Columns

NameTypeDescription
nametextThe name of the cursor
statementtextThe verbatim query string submitted to declare this cursor
is_holdableboolean true if the cursor is holdable (that is, it can be accessed after the transaction that declared the cursor has committed); false otherwise
is_binaryboolean true if the cursor was declared BINARY; false otherwise
is_scrollableboolean true if the cursor is scrollable (that is, it allows rows to be retrieved in a nonsequential manner); false otherwise
creation_timetimestamptzThe time at which the cursor was declared

The pg_cursors view is read only.

Documentazione di PostgreSQL 9.0 > Internal > System Catalogs > pg_cursors
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