The Close command disconnects a PersistentTable object from its connected database file and releases the associated resources.

Persistent tables are in general thread safe as of Maple 2021; see the Thread Safety section of the PersistentTable overview page for more details and caveats.

For more information on thread safety, see index/threadsafe.

$\mathrm{with}\left(\mathrm{PersistentTable}\right)$

$\left[\mathrm{Close}\,\mathrm{Count}\,\mathrm{Get}\,\mathrm{GetAll}\,\mathrm{GetKeys}\,\mathrm{Has}\,\mathrm{MaybeGet}\,\mathrm{Open}\,\mathrm{RawCommand}\,\mathrm{Set}\right]$

$\mathrm{connection}≔\mathrm{Open}\left('':memory:''\,\mathrm{style}=\left[k::\mathrm{integer}\,v::\mathrm{anything}\right]\right)$

$\mathrm{connection}≔\mathrm{<<\; 2-column\; persistent\; table\; at\; :memory:\; >>}$

$\mathrm{connection}\left[1\right]≔x+1$

${\mathrm{connection}}_1≔x+1$

$\mathrm{connection}\left[25\right]≔''test''$

${\mathrm{connection}}_{25}≔''test''$

$\mathrm{Close}\left(\mathrm{connection}\right)$

The PersistentTable[Close] command was introduced in Maple 2021.

For more information on Maple 2021 changes, see Updates in Maple 2021.