2 42.11. PL/Tcl Configuration #
4 This section lists configuration parameters that affect PL/Tcl.
6 pltcl.start_proc (string) #
7 This parameter, if set to a nonempty string, specifies the name
8 (possibly schema-qualified) of a parameterless PL/Tcl function
9 that is to be executed whenever a new Tcl interpreter is created
10 for PL/Tcl. Such a function can perform per-session
11 initialization, such as loading additional Tcl code. A new Tcl
12 interpreter is created when a PL/Tcl function is first executed
13 in a database session, or when an additional interpreter has to
14 be created because a PL/Tcl function is called by a new SQL
17 The referenced function must be written in the pltcl language,
18 and must not be marked SECURITY DEFINER. (These restrictions
19 ensure that it runs in the interpreter it's supposed to
20 initialize.) The current user must have permission to call it,
23 If the function fails with an error it will abort the function
24 call that caused the new interpreter to be created and propagate
25 out to the calling query, causing the current transaction or
26 subtransaction to be aborted. Any actions already done within
27 Tcl won't be undone; however, that interpreter won't be used
28 again. If the language is used again the initialization will be
29 attempted again within a fresh Tcl interpreter.
31 Only superusers can change this setting. Although this setting
32 can be changed within a session, such changes will not affect
33 Tcl interpreters that have already been created.
35 pltclu.start_proc (string) #
36 This parameter is exactly like pltcl.start_proc, except that it
37 applies to PL/TclU. The referenced function must be written in