diff --git a/doc/FAQ_DEV b/doc/FAQ_DEV index 31684a0692..f371a1e817 100644 --- a/doc/FAQ_DEV +++ b/doc/FAQ_DEV @@ -1,7 +1,7 @@ Developer's Frequently Asked Questions (FAQ) for PostgreSQL - Last updated: Sat May 5 00:09:15 EDT 2007 + Last updated: Sat May 5 06:20:41 EDT 2007 Current maintainer: Bruce Momjian (bruce@momjian.us) @@ -698,20 +698,21 @@ typedef struct nameData Here are some of the List manipulation commands: lfirst(i), lfirst_int(i), lfirst_oid(i) - return the data (a point, integer and OID respectively) at list - element i. + return the data (a pointer, integer or OID respectively) of + list cell i. lnext(i) - return the next list element after i. + return the next list cell after i. foreach(i, list) - loop through list, assigning each list element to i. It is - important to note that i is a List *, not the data in the List - element. You need to use lfirst(i) to get at the data. Here is - a typical code snippet that loops through a List containing Var - *'s and processes each one: + loop through list, assigning each list cell to i. It is + important to note that i is a ListCell *, not the data in the + List element. You need to use lfirst(i) to get at the data. + Here is a typical code snippet that loops through a List + containing Var *'s and processes each one: - List *list; + + List *list; ListCell *i; foreach(i, list) @@ -726,20 +727,20 @@ typedef struct nameData if list is NIL. lappend(list, node) - add node to the end of list. This is more expensive that lcons. + add node to the end of list. - nconc(list1, list2) - Concat list2 on to the end of list1. + list_concat(list1, list2) + Concatenate list2 on to the end of list1. - length(list) + list_length(list) return the length of the list. - nth(i, list) - return the i'th element in list. + list_nth(list, i) + return the i'th element in list, counting from zero. - lconsi, ... - There are integer versions of these: lconsi, lappendi, etc. - Also versions for OID lists: lconso, lappendo, etc. + lcons_int, ... + There are integer versions of these: lcons_int, lappend_int, + etc. Also versions for OID lists: lcons_oid, lappend_oid, etc. You can print nodes easily inside gdb. First, to disable output truncation when you use the gdb print command: @@ -758,7 +759,7 @@ typedef struct nameData 2.4) I just added a field to a structure. What else should I do? - The structures passing around from the parser, rewrite, optimizer, and + The structures passed around in the parser, rewriter, optimizer, and executor require quite a bit of support. Most structures have support routines in src/backend/nodes used to create, copy, read, and output those structures (in particular, the files copyfuncs.c and diff --git a/doc/src/FAQ/FAQ_DEV.html b/doc/src/FAQ/FAQ_DEV.html index 1489985fb6..f7f436759b 100644 --- a/doc/src/FAQ/FAQ_DEV.html +++ b/doc/src/FAQ/FAQ_DEV.html @@ -13,7 +13,7 @@

Developer's Frequently Asked Questions (FAQ) for PostgreSQL

-

Last updated: Sat May 5 00:09:15 EDT 2007

+

Last updated: Sat May 5 06:20:41 EDT 2007

Current maintainer: Bruce Momjian (bruce@momjian.us)
@@ -863,24 +863,25 @@

lfirst(i), lfirst_int(i), lfirst_oid(i)
-
return the data (a point, integer and OID respectively) at - list element i.
+
return the data (a pointer, integer or OID respectively) of + list cell i.
lnext(i)
-
return the next list element after i.
+
return the next list cell after i.
foreach(i, list)
- loop through list, assigning each list element to - i. It is important to note that i is a List *, + loop through list, assigning each list cell to + i. It is important to note that i is a ListCell *, not the data in the List element. You need to use lfirst(i) to get at the data. Here is a typical code snippet that loops through a List containing Var *'s and processes each one:
- List                *list;
+
+    List        *list;
     ListCell    *i;
 
     foreach(i, list)
@@ -900,26 +901,26 @@
 
         
lappend(list, node)
-
add node to the end of list. This is more - expensive that lcons.
+
add node to the end of list.
-
nconc(list1, list2)
+
list_concat(list1, list2)
-
Concat list2 on to the end of list1.
+
Concatenate list2 on to the end of list1.
-
length(list)
+
list_length(list)
return the length of the list.
-
nth(i, list)
+
list_nth(list, i)
-
return the i'th element in list.
+
return the i'th element in list, + counting from zero.
-
lconsi, ...
+
lcons_int, ...
-
There are integer versions of these: lconsi, - lappendi, etc. Also versions for OID lists: lconso, - lappendo, etc.
+
There are integer versions of these: lcons_int, + lappend_int, etc. Also versions for OID lists: lcons_oid, + lappend_oid, etc.
You can print nodes easily inside gdb. First, to disable @@ -944,7 +945,7 @@

2.4) I just added a field to a structure. What else should I do?

-

The structures passing around from the parser, rewrite, +

The structures passed around in the parser, rewriter, optimizer, and executor require quite a bit of support. Most structures have support routines in src/backend/nodes used to create, copy, read, and output those structures (in particular,