Bug#28317 Left Outer Join with {oj outer-join}

Parser rejects ODBC's escape sequences for outer joins other
than left outer join, yet the escape sequence BNF specifies
that this syntax can be used for left, right, and full outer
join syntax.

The problem is that although the MySQL Connector/ODBC advertises
"Outer Join Escape Sequence" capabilities, the parsing is done
in the server and historically it only supported this syntax
for left outer joins and applications such as Crystal Reports
11 tries to use this syntax for inner joins.

The chosen solution is to reorganize a couple of parser rules
to ignore any kind of SQL escape sequence. Ignoring the escape
sequences is harmless because the various SQL join clauses
are supported by the server.


mysql-test/r/parser.result:
  Add test case result for Bug#28317
mysql-test/t/parser.test:
  Add test case for Bug#28317
sql/sql_yacc.yy:
  Reorganize rules in order to ignore SQL Escape Sequences

mysql-test/r/bdb_notembedded.result

+set autocommit=1;
+reset master;
+create table bug16206 (a int);
+insert into bug16206 values(1);
+start transaction;
+insert into bug16206 values(2);
+commit;
+show binlog events;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+f	n	Format_desc	1	n	Server ver: VERSION, Binlog ver: 4
+f	n	Query	1	n	use `test`; create table bug16206 (a int)
+f	n	Query	1	n	use `test`; insert into bug16206 values(1)
+f	n	Query	1	n	use `test`; insert into bug16206 values(2)
+drop table bug16206;
+reset master;
+create table bug16206 (a int) engine=         bdb;
+insert into bug16206 values(0);
+insert into bug16206 values(1);
+start transaction;
+insert into bug16206 values(2);
+commit;
+insert into bug16206 values(3);
+show binlog events;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+f	n	Format_desc	1	n	Server ver: VERSION, Binlog ver: 4
+f	n	Query	1	n	use `test`; create table bug16206 (a int) engine=         bdb
+f	n	Query	1	n	use `test`; insert into bug16206 values(0)
+f	n	Query	1	n	use `test`; insert into bug16206 values(1)
+f	n	Query	1	n	use `test`; BEGIN
+f	n	Query	1	n	use `test`; insert into bug16206 values(2)
+f	n	Query	1	n	use `test`; COMMIT
+f	n	Query	1	n	use `test`; insert into bug16206 values(3)
+drop table bug16206;
+set autocommit=0;
+End of 5.0 tests

mysql-test/r/parser.result

@@ -527,3 +527,23 @@ SELECT * FROM t1 WHERE a = INTERVAL(3,2,1) + 1;
 a	b
 3	1998-01-01 00:00:00
 DROP TABLE t1;
+DROP TABLE IF EXISTS t1,t2,t3;
+CREATE TABLE t1 (a1 INT, a2 INT, a3 INT, a4 DATETIME);
+CREATE TABLE t2 LIKE t1;
+CREATE TABLE t3 LIKE t1;
+SELECT t1.* FROM t1 AS t0, { OJ t2 INNER JOIN t1 ON (t1.a1=t2.a1) } WHERE t0.a3=2;
+a1	a2	a3	a4
+SELECT t1.*,t2.* FROM { OJ ((t1 INNER JOIN t2 ON (t1.a1=t2.a2)) LEFT OUTER JOIN t3 ON t3.a3=t2.a1)};
+a1	a2	a3	a4	a1	a2	a3	a4
+SELECT t1.*,t2.* FROM { OJ ((t1 LEFT OUTER JOIN t2 ON t1.a3=t2.a2) INNER JOIN t3 ON (t3.a1=t2.a2))};
+a1	a2	a3	a4	a1	a2	a3	a4
+SELECT t1.*,t2.* FROM { OJ (t1 LEFT OUTER JOIN t2 ON t1.a1=t2.a2) CROSS JOIN t3 ON (t3.a2=t2.a3)};
+a1	a2	a3	a4	a1	a2	a3	a4
+SELECT * FROM {oj t1 LEFT OUTER JOIN t2 ON t1.a1=t2.a3} WHERE t1.a2 > 10;
+a1	a2	a3	a4	a1	a2	a3	a4
+SELECT {fn CONCAT(a1,a2)} FROM t1;
+{fn CONCAT(a1,a2)}
+UPDATE t3 SET a4={d '1789-07-14'} WHERE a1=0;
+SELECT a1, a4 FROM t2 WHERE a4 LIKE {fn UCASE('1789-07-14')};
+a1	a4
+DROP TABLE t1, t2, t3;

mysql-test/t/bdb_notembedded.test

+-- source include/not_embedded.inc
+-- source include/have_bdb.inc
+
+#
+# Bug #16206: Superfluous COMMIT event in binlog when updating BDB in autocommit mode
+#
+set autocommit=1;
+
+let $VERSION=`select version()`;
+
+reset master;
+create table bug16206 (a int);
+insert into bug16206 values(1);
+start transaction;
+insert into bug16206 values(2);
+commit;
+--replace_result $VERSION VERSION
+--replace_column 1 f 2 n 5 n
+show binlog events;
+drop table bug16206;
+
+reset master;
+create table bug16206 (a int) engine=         bdb;
+insert into bug16206 values(0);
+insert into bug16206 values(1);
+start transaction;
+insert into bug16206 values(2);
+commit;
+insert into bug16206 values(3);
+--replace_result $VERSION VERSION
+--replace_column 1 f 2 n 5 n
+show binlog events;
+drop table bug16206;
+
+set autocommit=0;
+
+
+--echo End of 5.0 tests

mysql-test/t/parser.test

@@ -657,3 +657,23 @@ CREATE TABLE t1 (a INT, b DATETIME);
 INSERT INTO t1 VALUES (INTERVAL(3,2,1) + 1, "1997-12-31 23:59:59" + INTERVAL 1 SECOND);
 SELECT * FROM t1 WHERE a = INTERVAL(3,2,1) + 1;
 DROP TABLE t1;
+
+#
+# Bug#28317 Left Outer Join with {oj outer-join}
+#
+
+--disable_warnings
+DROP TABLE IF EXISTS t1,t2,t3;
+--enable_warnings
+CREATE TABLE t1 (a1 INT, a2 INT, a3 INT, a4 DATETIME);
+CREATE TABLE t2 LIKE t1;
+CREATE TABLE t3 LIKE t1;
+SELECT t1.* FROM t1 AS t0, { OJ t2 INNER JOIN t1 ON (t1.a1=t2.a1) } WHERE t0.a3=2;
+SELECT t1.*,t2.* FROM { OJ ((t1 INNER JOIN t2 ON (t1.a1=t2.a2)) LEFT OUTER JOIN t3 ON t3.a3=t2.a1)};
+SELECT t1.*,t2.* FROM { OJ ((t1 LEFT OUTER JOIN t2 ON t1.a3=t2.a2) INNER JOIN t3 ON (t3.a1=t2.a2))};
+SELECT t1.*,t2.* FROM { OJ (t1 LEFT OUTER JOIN t2 ON t1.a1=t2.a2) CROSS JOIN t3 ON (t3.a2=t2.a3)};
+SELECT * FROM {oj t1 LEFT OUTER JOIN t2 ON t1.a1=t2.a3} WHERE t1.a2 > 10;
+SELECT {fn CONCAT(a1,a2)} FROM t1;
+UPDATE t3 SET a4={d '1789-07-14'} WHERE a1=0;
+SELECT a1, a4 FROM t2 WHERE a4 LIKE {fn UCASE('1789-07-14')};
+DROP TABLE t1, t2, t3;

sql/sql_yacc.yy

@@ -508,10 +508,10 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 
 %pure_parser                                    /* We have threads */
 /*
-  Currently there are 177 shift/reduce conflicts.
+  Currently there are 169 shift/reduce conflicts.
   We should not introduce new conflicts any more.
 */
-%expect 177
+%expect 169
 
 /*
    Comments for TOKENS.
@@ -1193,7 +1193,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 
 %type <table_list>
         join_table_list  join_table
-        table_factor table_ref
+        table_factor table_ref esc_table_ref
         select_derived derived_table_list
 
 %type <date_time_type> date_time_type;
@@ -7444,10 +7444,22 @@ join_table_list:
           derived_table_list { MYSQL_YYABORT_UNLESS($$=$1); }
         ;
 
+/*
+  The ODBC escape syntax for Outer Join is: '{' OJ join_table '}'
+  The parser does not define OJ as a token, any ident is accepted
+  instead in $2 (ident). Also, all productions from table_ref can
+  be escaped, not only join_table. Both syntax extensions are safe
+  and are ignored.
+*/
+esc_table_ref:
+        table_ref { $$=$1; }
+      | '{' ident table_ref '}' { $$=$3; }
+      ;
+
 /* Warning - may return NULL in case of incomplete SELECT */
 derived_table_list:
-          table_ref { $$=$1; }
-        | derived_table_list ',' table_ref
+          esc_table_ref { $$=$1; }
+        | derived_table_list ',' esc_table_ref
           {
             MYSQL_YYABORT_UNLESS($1 && ($$=$3));
           }
@@ -7612,25 +7624,6 @@ table_factor:
               MYSQL_YYABORT;
             Select->add_joined_table($$);
           }
-        | '{' ident table_ref LEFT OUTER JOIN_SYM table_ref
-          ON
-          {
-            /* Change the current name resolution context to a local context. */
-            if (push_new_name_resolution_context(YYTHD, $3, $7))
-              MYSQL_YYABORT;
-
-          }
-          expr '}'
-          {
-            LEX *lex= Lex;
-            MYSQL_YYABORT_UNLESS($3 && $7);
-            add_join_on($7,$10);
-            Lex->pop_context();
-            $7->outer_join|=JOIN_TYPE_LEFT;
-            $$=$7;
-            if (!($$= lex->current_select->nest_last_join(lex->thd)))
-              MYSQL_YYABORT;
-          }
         | select_derived_init get_select_lex select_derived2
           {
             LEX *lex= Lex;