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8.4 pgindent run, with new combined Linux/FreeBSD/MinGW typedef list

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provided by Andrew.
This commit is contained in:
Bruce Momjian
2009-06-11 14:49:15 +00:00
parent 4e86efb4e5
commit d747140279
654 changed files with 11900 additions and 11387 deletions
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174
src/backend/optimizer/prep/prepjointree.c
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@@ -16,7 +16,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.65 2009/04/28 21:31:16 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.66 2009/06/11 14:48:59 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -52,16 +52,16 @@ static Node *pull_up_simple_subquery(PlannerInfo *root, Node *jtnode,
static Node *pull_up_simple_union_all(PlannerInfo *root, Node *jtnode,
RangeTblEntry *rte);
static void pull_up_union_leaf_queries(Node *setOp, PlannerInfo *root,
int parentRTindex, Query *setOpQuery,
int childRToffset);
int parentRTindex, Query *setOpQuery,
int childRToffset);
static void make_setop_translation_list(Query *query, Index newvarno,
List **translated_vars);
List **translated_vars);
static bool is_simple_subquery(Query *subquery);
static bool is_simple_union_all(Query *subquery);
static bool is_simple_union_all_recurse(Node *setOp, Query *setOpQuery,
List *colTypes);
static List *insert_targetlist_placeholders(PlannerInfo *root, List *tlist,
int varno, bool wrap_non_vars);
int varno, bool wrap_non_vars);
static bool is_safe_append_member(Query *subquery);
static void resolvenew_in_jointree(Node *jtnode, int varno, RangeTblEntry *rte,
List *subtlist, List *subtlist_with_phvs,
@@ -74,7 +74,7 @@ static void reduce_outer_joins_pass2(Node *jtnode,
List *nonnullable_vars,
List *forced_null_vars);
static void substitute_multiple_relids(Node *node,
int varno, Relids subrelids);
int varno, Relids subrelids);
static void fix_append_rel_relids(List *append_rel_list, int varno,
Relids subrelids);
static Node *find_jointree_node_for_rel(Node *jtnode, int relid);
@@ -87,7 +87,7 @@ static Node *find_jointree_node_for_rel(Node *jtnode, int relid);
*
* A clause "foo op ANY (sub-SELECT)" can be processed by pulling the
* sub-SELECT up to become a rangetable entry and treating the implied
* comparisons as quals of a semijoin. However, this optimization *only*
* comparisons as quals of a semijoin. However, this optimization *only*
* works at the top level of WHERE or a JOIN/ON clause, because we cannot
* distinguish whether the ANY ought to return FALSE or NULL in cases
* involving NULL inputs. Also, in an outer join's ON clause we can only
@@ -104,7 +104,7 @@ static Node *find_jointree_node_for_rel(Node *jtnode, int relid);
* transformations if any are found.
*
* This routine has to run before preprocess_expression(), so the quals
* clauses are not yet reduced to implicit-AND format. That means we need
* clauses are not yet reduced to implicit-AND format. That means we need
* to recursively search through explicit AND clauses, which are
* probably only binary ANDs. We stop as soon as we hit a non-AND item.
*/
@@ -162,8 +162,8 @@ pull_up_sublinks_jointree_recurse(PlannerInfo *root, Node *jtnode,
/* First, recurse to process children and collect their relids */
foreach(l, f->fromlist)
{
Node *newchild;
Relids childrelids;
Node *newchild;
Relids childrelids;
newchild = pull_up_sublinks_jointree_recurse(root,
lfirst(l),
@@ -181,8 +181,8 @@ pull_up_sublinks_jointree_recurse(PlannerInfo *root, Node *jtnode,
/*
* Note that the result will be either newf, or a stack of JoinExprs
* with newf at the base. We rely on subsequent optimization steps
* to flatten this and rearrange the joins as needed.
* with newf at the base. We rely on subsequent optimization steps to
* flatten this and rearrange the joins as needed.
*
* Although we could include the pulled-up subqueries in the returned
* relids, there's no need since upper quals couldn't refer to their
@@ -199,8 +199,8 @@ pull_up_sublinks_jointree_recurse(PlannerInfo *root, Node *jtnode,
Node *jtlink;
/*
* Make a modifiable copy of join node, but don't bother copying
* its subnodes (yet).
* Make a modifiable copy of join node, but don't bother copying its
* subnodes (yet).
*/
j = (JoinExpr *) palloc(sizeof(JoinExpr));
memcpy(j, jtnode, sizeof(JoinExpr));
@@ -214,19 +214,19 @@ pull_up_sublinks_jointree_recurse(PlannerInfo *root, Node *jtnode,
/*
* Now process qual, showing appropriate child relids as available,
* and attach any pulled-up jointree items at the right place.
* In the inner-join case we put new JoinExprs above the existing one
* (much as for a FromExpr-style join). In outer-join cases the
* new JoinExprs must go into the nullable side of the outer join.
* The point of the available_rels machinations is to ensure that we
* only pull up quals for which that's okay.
* and attach any pulled-up jointree items at the right place. In the
* inner-join case we put new JoinExprs above the existing one (much
* as for a FromExpr-style join). In outer-join cases the new
* JoinExprs must go into the nullable side of the outer join. The
* point of the available_rels machinations is to ensure that we only
* pull up quals for which that's okay.
*
* XXX for the moment, we refrain from pulling up IN/EXISTS clauses
* appearing in LEFT or RIGHT join conditions. Although it is
* appearing in LEFT or RIGHT join conditions. Although it is
* semantically valid to do so under the above conditions, we end up
* with a query in which the semijoin or antijoin must be evaluated
* below the outer join, which could perform far worse than leaving
* it as a sublink that is executed only for row pairs that meet the
* below the outer join, which could perform far worse than leaving it
* as a sublink that is executed only for row pairs that meet the
* other join conditions. Fixing this seems to require considerable
* restructuring of the executor, but maybe someday it can happen.
*
@@ -238,7 +238,7 @@ pull_up_sublinks_jointree_recurse(PlannerInfo *root, Node *jtnode,
case JOIN_INNER:
j->quals = pull_up_sublinks_qual_recurse(root, j->quals,
bms_union(leftrelids,
rightrelids),
rightrelids),
&jtlink);
break;
case JOIN_LEFT:
@@ -267,7 +267,7 @@ pull_up_sublinks_jointree_recurse(PlannerInfo *root, Node *jtnode,
/*
* Although we could include the pulled-up subqueries in the returned
* relids, there's no need since upper quals couldn't refer to their
* outputs anyway. But we *do* need to include the join's own rtindex
* outputs anyway. But we *do* need to include the join's own rtindex
* because we haven't yet collapsed join alias variables, so upper
* levels would mistakenly think they couldn't use references to this
* join.
@@ -416,7 +416,7 @@ inline_set_returning_functions(PlannerInfo *root)
if (rte->rtekind == RTE_FUNCTION)
{
Query *funcquery;
Query *funcquery;
/* Check safety of expansion, and expand if possible */
funcquery = inline_set_returning_function(root, rte);
@@ -495,10 +495,10 @@ pull_up_subqueries(PlannerInfo *root, Node *jtnode,
* Alternatively, is it a simple UNION ALL subquery? If so, flatten
* into an "append relation".
*
* It's safe to do this regardless of whether this query is
* itself an appendrel member. (If you're thinking we should try to
* flatten the two levels of appendrel together, you're right; but we
* handle that in set_append_rel_pathlist, not here.)
* It's safe to do this regardless of whether this query is itself an
* appendrel member. (If you're thinking we should try to flatten the
* two levels of appendrel together, you're right; but we handle that
* in set_append_rel_pathlist, not here.)
*/
if (rte->rtekind == RTE_SUBQUERY &&
is_simple_union_all(rte->subquery))
@@ -637,10 +637,10 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
* pull_up_subqueries' processing is complete for its jointree and
* rangetable.
*
* Note: we should pass NULL for containing-join info even if we are within
* an outer join in the upper query; the lower query starts with a clean
* slate for outer-join semantics. Likewise, we say we aren't handling an
* appendrel member.
* Note: we should pass NULL for containing-join info even if we are
* within an outer join in the upper query; the lower query starts with a
* clean slate for outer-join semantics. Likewise, we say we aren't
* handling an appendrel member.
*/
subquery->jointree = (FromExpr *)
pull_up_subqueries(subroot, (Node *) subquery->jointree, NULL, NULL);
@@ -673,8 +673,8 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
/*
* Adjust level-0 varnos in subquery so that we can append its rangetable
* to upper query's. We have to fix the subquery's append_rel_list
* as well.
* to upper query's. We have to fix the subquery's append_rel_list as
* well.
*/
rtoffset = list_length(parse->rtable);
OffsetVarNodes((Node *) subquery, rtoffset, 0);
@@ -691,15 +691,15 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
* The subquery's targetlist items are now in the appropriate form to
* insert into the top query, but if we are under an outer join then
* non-nullable items may have to be turned into PlaceHolderVars. If we
* are dealing with an appendrel member then anything that's not a
* simple Var has to be turned into a PlaceHolderVar.
* are dealing with an appendrel member then anything that's not a simple
* Var has to be turned into a PlaceHolderVar.
*/
subtlist = subquery->targetList;
if (lowest_outer_join != NULL || containing_appendrel != NULL)
subtlist_with_phvs = insert_targetlist_placeholders(root,
subtlist,
varno,
containing_appendrel != NULL);
containing_appendrel != NULL);
else
subtlist_with_phvs = subtlist;
@@ -709,7 +709,7 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
* replace any of the jointree structure. (This'd be a lot cleaner if we
* could use query_tree_mutator.) We have to use PHVs in the targetList,
* returningList, and havingQual, since those are certainly above any
* outer join. resolvenew_in_jointree tracks its location in the jointree
* outer join. resolvenew_in_jointree tracks its location in the jointree
* and uses PHVs or not appropriately.
*/
parse->targetList = (List *)
@@ -730,11 +730,11 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
subtlist_with_phvs, CMD_SELECT, 0);
/*
* Replace references in the translated_vars lists of appendrels.
* When pulling up an appendrel member, we do not need PHVs in the list
* of the parent appendrel --- there isn't any outer join between.
* Elsewhere, use PHVs for safety. (This analysis could be made tighter
* but it seems unlikely to be worth much trouble.)
* Replace references in the translated_vars lists of appendrels. When
* pulling up an appendrel member, we do not need PHVs in the list of the
* parent appendrel --- there isn't any outer join between. Elsewhere, use
* PHVs for safety. (This analysis could be made tighter but it seems
* unlikely to be worth much trouble.)
*/
foreach(lc, root->append_rel_list)
{
@@ -753,9 +753,9 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
*
* You might think that we could avoid using PHVs for alias vars of joins
* below lowest_outer_join, but that doesn't work because the alias vars
* could be referenced above that join; we need the PHVs to be present
* in such references after the alias vars get flattened. (It might be
* worth trying to be smarter here, someday.)
* could be referenced above that join; we need the PHVs to be present in
* such references after the alias vars get flattened. (It might be worth
* trying to be smarter here, someday.)
*/
foreach(lc, parse->rtable)
{
@@ -789,9 +789,9 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
* will be adjusted, so having created them with the subquery's varno is
* correct.
*
* Likewise, relids appearing in AppendRelInfo nodes have to be fixed.
* We already checked that this won't require introducing multiple
* subrelids into the single-slot AppendRelInfo structs.
* Likewise, relids appearing in AppendRelInfo nodes have to be fixed. We
* already checked that this won't require introducing multiple subrelids
* into the single-slot AppendRelInfo structs.
*/
if (parse->hasSubLinks || root->glob->lastPHId != 0 ||
root->append_rel_list)
@@ -822,9 +822,10 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte,
* Miscellaneous housekeeping.
*/
parse->hasSubLinks |= subquery->hasSubLinks;
/*
* subquery won't be pulled up if it hasAggs or hasWindowFuncs, so no
* work needed on those flags
* subquery won't be pulled up if it hasAggs or hasWindowFuncs, so no work
* needed on those flags
*/
/*
@@ -859,10 +860,10 @@ pull_up_simple_union_all(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte)
/*
* Append child RTEs to parent rtable.
*
* Upper-level vars in subquery are now one level closer to their
* parent than before. We don't have to worry about offsetting
* varnos, though, because any such vars must refer to stuff above the
* level of the query we are pulling into.
* Upper-level vars in subquery are now one level closer to their parent
* than before. We don't have to worry about offsetting varnos, though,
* because any such vars must refer to stuff above the level of the query
* we are pulling into.
*/
rtable = copyObject(subquery->rtable);
IncrementVarSublevelsUp_rtable(rtable, -1, 1);
@@ -1049,11 +1050,11 @@ is_simple_subquery(Query *subquery)
* query_planner() will correctly generate a Result plan for a jointree
* that's totally empty, but I don't think the right things happen if an
* empty FromExpr appears lower down in a jointree. It would pose a
* problem for the PlaceHolderVar mechanism too, since we'd have no
* way to identify where to evaluate a PHV coming out of the subquery.
* Not worth working hard on this, just to collapse SubqueryScan/Result
* into Result; especially since the SubqueryScan can often be optimized
* away by setrefs.c anyway.
* problem for the PlaceHolderVar mechanism too, since we'd have no way to
* identify where to evaluate a PHV coming out of the subquery. Not worth
* working hard on this, just to collapse SubqueryScan/Result into Result;
* especially since the SubqueryScan can often be optimized away by
* setrefs.c anyway.
*/
if (subquery->jointree->fromlist == NIL)
return false;
@@ -1167,8 +1168,8 @@ insert_targetlist_placeholders(PlannerInfo *root, List *tlist,
}
/*
* Simple Vars always escape being wrapped. This is common enough
* to deserve a fast path even if we aren't doing wrap_non_vars.
* Simple Vars always escape being wrapped. This is common enough to
* deserve a fast path even if we aren't doing wrap_non_vars.
*/
if (tle->expr && IsA(tle->expr, Var) &&
((Var *) tle->expr)->varlevelsup == 0)
@@ -1180,8 +1181,8 @@ insert_targetlist_placeholders(PlannerInfo *root, List *tlist,
if (!wrap_non_vars)
{
/*
* If it contains a Var of current level, and does not contain
* any non-strict constructs, then it's certainly nullable and we
* If it contains a Var of current level, and does not contain any
* non-strict constructs, then it's certainly nullable and we
* don't need to insert a PlaceHolderVar. (Note: in future maybe
* we should insert PlaceHolderVars anyway, when a tlist item is
* expensive to evaluate?
@@ -1248,7 +1249,7 @@ is_safe_append_member(Query *subquery)
* but there's no other way...
*
* If we are above lowest_outer_join then use subtlist_with_phvs; at or
* below it, use subtlist. (When no outer joins are in the picture,
* below it, use subtlist. (When no outer joins are in the picture,
* these will be the same list.)
*/
static void
@@ -1328,7 +1329,7 @@ resolvenew_in_jointree(Node *jtnode, int varno, RangeTblEntry *rte,
* SELECT ... FROM a LEFT JOIN b ON (a.x = b.y) WHERE b.y IS NULL;
* If the join clause is strict for b.y, then only null-extended rows could
* pass the upper WHERE, and we can conclude that what the query is really
* specifying is an anti-semijoin. We change the join type from JOIN_LEFT
* specifying is an anti-semijoin. We change the join type from JOIN_LEFT
* to JOIN_ANTI. The IS NULL clause then becomes redundant, and must be
* removed to prevent bogus selectivity calculations, but we leave it to
* distribute_qual_to_rels to get rid of such clauses.
@@ -1533,6 +1534,7 @@ reduce_outer_joins_pass2(Node *jtnode,
break;
case JOIN_SEMI:
case JOIN_ANTI:
/*
* These could only have been introduced by pull_up_sublinks,
* so there's no way that upper quals could refer to their
@@ -1565,14 +1567,14 @@ reduce_outer_joins_pass2(Node *jtnode,
}
/*
* See if we can reduce JOIN_LEFT to JOIN_ANTI. This is the case
* if the join's own quals are strict for any var that was forced
* null by higher qual levels. NOTE: there are other ways that we
* could detect an anti-join, in particular if we were to check
* whether Vars coming from the RHS must be non-null because of
* table constraints. That seems complicated and expensive though
* (in particular, one would have to be wary of lower outer joins).
* For the moment this seems sufficient.
* See if we can reduce JOIN_LEFT to JOIN_ANTI. This is the case if
* the join's own quals are strict for any var that was forced null by
* higher qual levels. NOTE: there are other ways that we could
* detect an anti-join, in particular if we were to check whether Vars
* coming from the RHS must be non-null because of table constraints.
* That seems complicated and expensive though (in particular, one
* would have to be wary of lower outer joins). For the moment this
* seems sufficient.
*/
if (jointype == JOIN_LEFT)
{
@@ -1582,8 +1584,8 @@ reduce_outer_joins_pass2(Node *jtnode,
computed_local_nonnullable_vars = true;
/*
* It's not sufficient to check whether local_nonnullable_vars
* and forced_null_vars overlap: we need to know if the overlap
* It's not sufficient to check whether local_nonnullable_vars and
* forced_null_vars overlap: we need to know if the overlap
* includes any RHS variables.
*/
overlap = list_intersection(local_nonnullable_vars,
@@ -1621,11 +1623,11 @@ reduce_outer_joins_pass2(Node *jtnode,
* side, because an outer join never eliminates any rows from its
* non-nullable side. Also, there is no point in passing upper
* constraints into the nullable side, since if there were any
* we'd have been able to reduce the join. (In the case of
* upper forced-null constraints, we *must not* pass them into
* the nullable side --- they either applied here, or not.)
* The upshot is that we pass either the local or the upper
* constraints, never both, to the children of an outer join.
* we'd have been able to reduce the join. (In the case of upper
* forced-null constraints, we *must not* pass them into the
* nullable side --- they either applied here, or not.) The upshot
* is that we pass either the local or the upper constraints,
* never both, to the children of an outer join.
*
* At a FULL join we just punt and pass nothing down --- is it
* possible to be smarter?
@@ -1640,7 +1642,7 @@ reduce_outer_joins_pass2(Node *jtnode,
{
/* OK to merge upper and local constraints */
local_nonnullable_rels = bms_add_members(local_nonnullable_rels,
nonnullable_rels);
nonnullable_rels);
local_nonnullable_vars = list_concat(local_nonnullable_vars,
nonnullable_vars);
local_forced_null_vars = list_concat(local_forced_null_vars,
@@ -1663,7 +1665,7 @@ reduce_outer_joins_pass2(Node *jtnode,
pass_nonnullable_vars = local_nonnullable_vars;
pass_forced_null_vars = local_forced_null_vars;
}
else if (jointype != JOIN_FULL) /* ie, LEFT/SEMI/ANTI */
else if (jointype != JOIN_FULL) /* ie, LEFT/SEMI/ANTI */
{
/* can't pass local constraints to non-nullable side */
pass_nonnullable_rels = nonnullable_rels;
@@ -1722,7 +1724,7 @@ reduce_outer_joins_pass2(Node *jtnode,
* top query could (yet) contain such a reference.
*
* NOTE: although this has the form of a walker, we cheat and modify the
* nodes in-place. This should be OK since the tree was copied by ResolveNew
* nodes in-place. This should be OK since the tree was copied by ResolveNew
* earlier. Avoid scribbling on the original values of the bitmapsets, though,
* because expression_tree_mutator doesn't copy those.
*/