src/backend/utils/mmgr/mcxt.c
void
MemoryContextSetIdentifier(MemoryContext context, const char *id)
{
	AssertArg(MemoryContextIsValid(context));
	context->ident = id;
}
/*
 * MemoryContextSetIdentifier
 *		Set the identifier string for a memory context.
 *
 * An identifier can be provided to help distinguish among different contexts
 * of the same kind in memory context stats dumps.  The identifier string
 * must live at least as long as the context it is for; typically it is
 * allocated inside that context, so that it automatically goes away on
 * context deletion.  Pass id = NULL to forget any old identifier.
 */
MemoryContextSetIdentifier
Set the identifier string for a memory context.

An identifier can be provided to help distinguish among different contexts
of the same kind in memory context stats dumps.  The identifier string
must live at least as long as the context it is for; typically it is
allocated inside that context, so that it automatically goes away on
context deletion.  Pass id = NULL to forget any old identifier.
MemoryContextSetIdentifier Set the identifier string for a memory context . An identifier can be provided to help distinguish among different contexts of the same kind in memory context stats dumps . The identifier string must live at least as long as the context it is for ; typically it is allocated inside that context so that it automatically goes away on context deletion . Pass id = NULL to forget any old identifier .
void
MemoryContextSetIdentifier(MemoryContext context, const char *id)
{
	AssertArg(MemoryContextIsValid(context));
	context->ident = id;
}
void MemoryContextSetIdentifier ( MemoryContext context , const char * id ) { AssertArg ( MemoryContextIsValid ( context ) ) ; context -> ident = id ; }
MemoryContextSetIdentifier
              Set the identifier string for a memory context.
MemoryContextSetIdentifier Set the identifier string for a memory context .