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Get rid of redundant production in plpgsql grammar.

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There may once have been a reason for the intermediate proc_stmts
production in the plpgsql grammar, but it isn't doing anything useful
anymore, so let's collapse it into proc_sect.  Saves some code and
probably a small number of nanoseconds per statement list.

In passing, correctly alphabetize keyword lists to match pl_scanner.c;
note that for "rowtype" vs "row_count", pl_scanner.c must sort on the
basis of the lower-case spelling.

Noted while fooling with a patch to de-reserve more plpgsql keywords.
This commit is contained in:
Tom Lane 2014-11-23 15:31:32 -05:00
parent 02d5ab6a86
commit e2dc3f5772
1 changed files with 11 additions and 21 deletions
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32
src/pl/plpgsql/src/pl_gram.y
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@ -188,7 +188,7 @@ static void check_raise_parameters(PLpgSQL_stmt_raise *stmt);
%type <str> any_identifier opt_block_label opt_label option_value
%type <list> proc_sect proc_stmts stmt_elsifs stmt_else
%type <list> proc_sect stmt_elsifs stmt_else
%type <loop_body> loop_body
%type <stmt> proc_stmt pl_block
%type <stmt> stmt_assign stmt_if stmt_loop stmt_while stmt_exit
@ -318,8 +318,8 @@ static void check_raise_parameters(PLpgSQL_stmt_raise *stmt);
%token <keyword> K_RETURN
%token <keyword> K_RETURNED_SQLSTATE
%token <keyword> K_REVERSE
%token <keyword> K_ROWTYPE
%token <keyword> K_ROW_COUNT
%token <keyword> K_ROWTYPE
%token <keyword> K_SCHEMA
%token <keyword> K_SCHEMA_NAME
%token <keyword> K_SCROLL
@ -838,24 +838,14 @@ assign_operator : '='
proc_sect :
{ $$ = NIL; }
| proc_stmts
{ $$ = $1; }
;
proc_stmts : proc_stmts proc_stmt
{
if ($2 == NULL)
$$ = $1;
else
$$ = lappend($1, $2);
}
| proc_stmt
{
if ($1 == NULL)
$$ = NIL;
else
$$ = list_make1($1);
}
| proc_sect proc_stmt
{
/* don't bother linking null statements into list */
if ($2 == NULL)
$$ = $1;
else
$$ = lappend($1, $2);
}
;
proc_stmt : pl_block ';'
@ -2356,8 +2346,8 @@ unreserved_keyword :
| K_PG_EXCEPTION_CONTEXT
| K_PG_EXCEPTION_DETAIL
| K_PG_EXCEPTION_HINT
| K_PRIOR
| K_PRINT_STRICT_PARAMS
| K_PRIOR
| K_QUERY
| K_RELATIVE
| K_RESULT_OID