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Standard pgindent run for 8.1.
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@@ -25,7 +25,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepqual.c,v 1.50 2005/07/29 21:40:02 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepqual.c,v 1.51 2005/10/15 02:49:21 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@@ -73,10 +73,10 @@ canonicalize_qual(Expr *qual)
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return NULL;
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/*
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* Push down NOTs. We do this only in the top-level boolean
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* expression, without examining arguments of operators/functions. The
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* main reason for doing this is to expose as much top-level AND/OR
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* structure as we can, so there's no point in descending further.
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* Push down NOTs. We do this only in the top-level boolean expression,
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* without examining arguments of operators/functions. The main reason for
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* doing this is to expose as much top-level AND/OR structure as we can,
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* so there's no point in descending further.
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*/
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newqual = find_nots(qual);
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@@ -110,12 +110,12 @@ pull_ands(List *andlist)
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/*
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* Note: we can destructively concat the subexpression's arglist
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* because we know the recursive invocation of pull_ands will have
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* built a new arglist not shared with any other expr. Otherwise
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* we'd need a list_copy here.
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* built a new arglist not shared with any other expr. Otherwise we'd
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* need a list_copy here.
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*/
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if (and_clause(subexpr))
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out_list = list_concat(out_list,
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pull_ands(((BoolExpr *) subexpr)->args));
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pull_ands(((BoolExpr *) subexpr)->args));
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else
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out_list = lappend(out_list, subexpr);
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}
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@@ -142,12 +142,12 @@ pull_ors(List *orlist)
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/*
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* Note: we can destructively concat the subexpression's arglist
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* because we know the recursive invocation of pull_ors will have
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* built a new arglist not shared with any other expr. Otherwise
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* we'd need a list_copy here.
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* built a new arglist not shared with any other expr. Otherwise we'd
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* need a list_copy here.
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*/
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if (or_clause(subexpr))
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out_list = list_concat(out_list,
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pull_ors(((BoolExpr *) subexpr)->args));
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pull_ors(((BoolExpr *) subexpr)->args));
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else
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out_list = lappend(out_list, subexpr);
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}
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@@ -249,8 +249,8 @@ push_nots(Expr *qual)
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{
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/*
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* Another NOT cancels this NOT, so eliminate the NOT and stop
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* negating this branch. But search the subexpression for more
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* NOTs to simplify.
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* negating this branch. But search the subexpression for more NOTs
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* to simplify.
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*/
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return find_nots(get_notclausearg(qual));
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}
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@@ -307,8 +307,8 @@ find_duplicate_ors(Expr *qual)
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orlist = lappend(orlist, find_duplicate_ors(lfirst(temp)));
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/*
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* Don't need pull_ors() since this routine will never introduce
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* an OR where there wasn't one before.
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* Don't need pull_ors() since this routine will never introduce an OR
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* where there wasn't one before.
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*/
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return process_duplicate_ors(orlist);
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}
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@@ -353,10 +353,10 @@ process_duplicate_ors(List *orlist)
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return linitial(orlist);
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/*
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* Choose the shortest AND clause as the reference list --- obviously,
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* any subclause not in this clause isn't in all the clauses. If we
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* find a clause that's not an AND, we can treat it as a one-element
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* AND clause, which necessarily wins as shortest.
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* Choose the shortest AND clause as the reference list --- obviously, any
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* subclause not in this clause isn't in all the clauses. If we find a
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* clause that's not an AND, we can treat it as a one-element AND clause,
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* which necessarily wins as shortest.
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*/
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foreach(temp, orlist)
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{
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@@ -386,8 +386,8 @@ process_duplicate_ors(List *orlist)
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reference = list_union(NIL, reference);
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/*
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* Check each element of the reference list to see if it's in all the
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* OR clauses. Build a new list of winning clauses.
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* Check each element of the reference list to see if it's in all the OR
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* clauses. Build a new list of winning clauses.
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*/
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winners = NIL;
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foreach(temp, reference)
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@@ -431,13 +431,12 @@ process_duplicate_ors(List *orlist)
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/*
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* Generate new OR list consisting of the remaining sub-clauses.
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*
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* If any clause degenerates to empty, then we have a situation like (A
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* AND B) OR (A), which can be reduced to just A --- that is, the
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* additional conditions in other arms of the OR are irrelevant.
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* If any clause degenerates to empty, then we have a situation like (A AND
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* B) OR (A), which can be reduced to just A --- that is, the additional
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* conditions in other arms of the OR are irrelevant.
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*
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* Note that because we use list_difference, any multiple occurrences of
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* a winning clause in an AND sub-clause will be removed
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* automatically.
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* Note that because we use list_difference, any multiple occurrences of a
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* winning clause in an AND sub-clause will be removed automatically.
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*/
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neworlist = NIL;
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foreach(temp, orlist)
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@@ -475,10 +474,10 @@ process_duplicate_ors(List *orlist)
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}
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/*
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* Append reduced OR to the winners list, if it's not degenerate,
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* handling the special case of one element correctly (can that really
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* happen?). Also be careful to maintain AND/OR flatness in case we
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* pulled up a sub-sub-OR-clause.
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* Append reduced OR to the winners list, if it's not degenerate, handling
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* the special case of one element correctly (can that really happen?).
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* Also be careful to maintain AND/OR flatness in case we pulled up a
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* sub-sub-OR-clause.
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*/
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if (neworlist != NIL)
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{
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