diff options
Diffstat (limited to 'src/backend/optimizer/path/joinutils.c')
| -rw-r--r-- | src/backend/optimizer/path/joinutils.c | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/src/backend/optimizer/path/joinutils.c b/src/backend/optimizer/path/joinutils.c index b9b277d69f5..2a0f334317f 100644 --- a/src/backend/optimizer/path/joinutils.c +++ b/src/backend/optimizer/path/joinutils.c @@ -1,13 +1,13 @@ /*------------------------------------------------------------------------- * - * joinutils.c-- + * joinutils.c * Utilities for matching and building join and path keys * * Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/path/Attic/joinutils.c,v 1.19 1999/02/11 17:00:48 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/path/Attic/joinutils.c,v 1.20 1999/02/13 23:16:19 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -40,7 +40,7 @@ static List *new_matching_subkeys(Var *subkey, List *considered_subkeys, ****************************************************************************/ /* - * match-pathkeys-joinkeys-- + * match_pathkeys_joinkeys * Attempts to match the keys of a path against the keys of join clauses. * This is done by looking for a matching join key in 'joinkeys' for * every path key in the list 'path.keys'. If there is a matching join key @@ -54,7 +54,7 @@ static List *new_matching_subkeys(Var *subkey, List *considered_subkeys, * ( (outer inner) (outer inner) ... ) * 'joinclauses' is a list of clauses corresponding to the join keys in * 'joinkeys' - * 'which-subkey' is a flag that selects the desired subkey of a join key + * 'which_subkey' is a flag that selects the desired subkey of a join key * in 'joinkeys' * * Returns the join keys and corresponding join clauses in a list if all @@ -112,7 +112,7 @@ match_pathkeys_joinkeys(List *pathkeys, } /* - * match-pathkey-joinkeys-- + * match_pathkey_joinkeys * Returns the 0-based index into 'joinkeys' of the first joinkey whose * outer or inner subkey matches any subkey of 'pathkey'. */ @@ -144,7 +144,7 @@ match_pathkey_joinkeys(List *pathkey, } /* - * match-paths-joinkeys-- + * match_paths_joinkeys * Attempts to find a path in 'paths' whose keys match a set of join * keys 'joinkeys'. To match, * 1. the path node ordering must equal 'ordering'. @@ -159,7 +159,7 @@ match_pathkey_joinkeys(List *pathkey, * must correspond * 'paths' is a list of(inner) paths which are to be matched against * each join key in 'joinkeys' - * 'which-subkey' is a flag that selects the desired subkey of a join key + * 'which_subkey' is a flag that selects the desired subkey of a join key * in 'joinkeys' * * Returns the matching path node if one exists, nil otherwise. @@ -238,14 +238,14 @@ match_paths_joinkeys(List *joinkeys, /* - * extract-path-keys-- + * extract_path_keys * Builds a subkey list for a path by pulling one of the subkeys from * a list of join keys 'joinkeys' and then finding the var node in the * target list 'tlist' that corresponds to that subkey. * * 'joinkeys' is a list of join key pairs * 'tlist' is a relation target list - * 'which-subkey' is a flag that selects the desired subkey of a join key + * 'which_subkey' is a flag that selects the desired subkey of a join key * in 'joinkeys' * * Returns a list of pathkeys: ((tlvar1)(tlvar2)...(tlvarN)). @@ -296,7 +296,7 @@ extract_path_keys(List *joinkeys, ****************************************************************************/ /* - * new-join-pathkeys-- + * new_join_pathkeys * Find the path keys for a join relation by finding all vars in the list * of join clauses 'joinclauses' such that: * (1) the var corresponding to the outer join relation is a @@ -305,8 +305,8 @@ extract_path_keys(List *joinkeys, * In other words, add to each outer path key the inner path keys that * are required for qualification. * - * 'outer-pathkeys' is the list of the outer path's path keys - * 'join-rel-tlist' is the target list of the join relation + * 'outer_pathkeys' is the list of the outer path's path keys + * 'join_rel_tlist' is the target list of the join relation * 'joinclauses' is the list of restricting join clauses * * Returns the list of new path keys. @@ -333,17 +333,17 @@ new_join_pathkeys(List *outer_pathkeys, } /* - * new-join-pathkey-- + * new_join_pathkey * Finds new vars that become subkeys due to qualification clauses that * contain any previously considered subkeys. These new subkeys plus the * subkeys from 'subkeys' form a new pathkey for the join relation. * * Note that each returned subkey is the var node found in - * 'join-rel-tlist' rather than the joinclause var node. + * 'join_rel_tlist' rather than the joinclause var node. * * 'subkeys' is a list of subkeys for which matching subkeys are to be * found - * 'considered-subkeys' is the current list of all subkeys corresponding + * 'considered_subkeys' is the current list of all subkeys corresponding * to a given pathkey * * Returns a new pathkey(list of subkeys). @@ -388,15 +388,15 @@ new_join_pathkey(List *subkeys, } /* - * new-matching-subkeys-- + * new_matching_subkeys * Returns a list of new subkeys: - * (1) which are not listed in 'considered-subkeys' + * (1) which are not listed in 'considered_subkeys' * (2) for which the "other" variable in some clause in 'joinclauses' is * 'subkey' - * (3) which are mentioned in 'join-rel-tlist' + * (3) which are mentioned in 'join_rel_tlist' * * Note that each returned subkey is the var node found in - * 'join-rel-tlist' rather than the joinclause var node. + * 'join_rel_tlist' rather than the joinclause var node. * * 'subkey' is the var node for which we are trying to find matching * clauses |