diff options
Diffstat (limited to 'src/backend/parser/gram.y')
| -rw-r--r-- | src/backend/parser/gram.y | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y index 2132cf4d82..7ff36bc842 100644 --- a/src/backend/parser/gram.y +++ b/src/backend/parser/gram.y @@ -239,6 +239,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query); WindowDef *windef; JoinExpr *jexpr; IndexElem *ielem; + StatsElem *selem; Alias *alias; RangeVar *range; IntoClause *into; @@ -405,7 +406,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query); old_aggr_definition old_aggr_list oper_argtypes RuleActionList RuleActionMulti opt_column_list columnList opt_name_list - sort_clause opt_sort_clause sortby_list index_params + sort_clause opt_sort_clause sortby_list index_params stats_params opt_include opt_c_include index_including_params name_list role_list from_clause from_list opt_array_bounds qualified_name_list any_name any_name_list type_name_list @@ -512,6 +513,7 @@ static Node *makeRecursiveViewSelect(char *relname, List *aliases, Node *query); %type <list> func_alias_clause %type <sortby> sortby %type <ielem> index_elem index_elem_options +%type <selem> stats_param %type <node> table_ref %type <jexpr> joined_table %type <range> relation_expr @@ -4097,7 +4099,7 @@ ExistingIndex: USING INDEX name { $$ = $3; } CreateStatsStmt: CREATE STATISTICS any_name - opt_name_list ON expr_list FROM from_list + opt_name_list ON stats_params FROM from_list { CreateStatsStmt *n = makeNode(CreateStatsStmt); n->defnames = $3; @@ -4109,7 +4111,7 @@ CreateStatsStmt: $$ = (Node *)n; } | CREATE STATISTICS IF_P NOT EXISTS any_name - opt_name_list ON expr_list FROM from_list + opt_name_list ON stats_params FROM from_list { CreateStatsStmt *n = makeNode(CreateStatsStmt); n->defnames = $6; @@ -4122,6 +4124,36 @@ CreateStatsStmt: } ; +/* + * Statistics attributes can be either simple column references, or arbitrary + * expressions in parens. For compatibility with index attributes permitted + * in CREATE INDEX, we allow an expression that's just a function call to be + * written without parens. + */ + +stats_params: stats_param { $$ = list_make1($1); } + | stats_params ',' stats_param { $$ = lappend($1, $3); } + ; + +stats_param: ColId + { + $$ = makeNode(StatsElem); + $$->name = $1; + $$->expr = NULL; + } + | func_expr_windowless + { + $$ = makeNode(StatsElem); + $$->name = NULL; + $$->expr = $1; + } + | '(' a_expr ')' + { + $$ = makeNode(StatsElem); + $$->name = NULL; + $$->expr = $2; + } + ; /***************************************************************************** * |