MDEV-10095 Fix derived tables to return a syntax error instead of "Il…

…legal usage of UNION and LIMIT"

mysql-test/r/join.result

@@ -1476,7 +1476,7 @@ DROP TABLE t1,t2,t3,t4,t5;
 # MDEV-4752: Segfault during parsing of illegal query
 #
 SELECT * FROM t5 JOIN (t1 JOIN t2 UNION SELECT * FROM t3 JOIN t4);
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT * FROM t3 JOIN t4)' at line 1
 #
 # MDEV-4959: join of const table with NULL fields
 #

mysql-test/r/parser.result

@@ -822,19 +822,19 @@ ERROR 42000: You have an error in your SQL syntax; check the manual that corresp
 SELECT (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1);
 ERROR HY000: Incorrect usage of UNION and ORDER BY
 SELECT 1 FROM (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1) a;
-ERROR HY000: Incorrect usage of UNION and ORDER BY
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1) a' at line 1
 SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1' at line 1
 SELECT (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1);
 ERROR HY000: Incorrect usage of UNION and LIMIT
 SELECT 1 FROM (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1) a;
-ERROR HY000: Incorrect usage of UNION and LIMIT
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1) a' at line 1
 SELECT 1 FROM t1 ORDER BY 1 LIMIT 1 UNION SELECT 1 FROM t1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1' at line 1
 SELECT (SELECT 1 FROM t1 ORDER BY 1 LIMIT 1 UNION SELECT 1 FROM t1);
 ERROR HY000: Incorrect usage of UNION and ORDER BY
 SELECT 1 FROM (SELECT 1 FROM t1 ORDER BY 1 LIMIT 1 UNION SELECT 1 FROM t1) a;
-ERROR HY000: Incorrect usage of UNION and ORDER BY
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1) a' at line 1
 SELECT 1 FROM t1 LIMIT 1 ORDER BY 1 UNION SELECT 1 FROM t1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'ORDER BY 1 UNION SELECT 1 FROM t1' at line 1
 SELECT (SELECT 1 FROM t1 LIMIT 1 ORDER BY 1 UNION SELECT 1 FROM t1);
@@ -846,25 +846,25 @@ ERROR 42000: You have an error in your SQL syntax; check the manual that corresp
 SELECT (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 ORDER BY 1);
 ERROR HY000: Incorrect usage of UNION and ORDER BY
 SELECT 1 FROM (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 ORDER BY 1) a;
-ERROR HY000: Incorrect usage of UNION and ORDER BY
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1 ORDER BY 1) a' at line 1
 SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 LIMIT 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1 LIMIT 1' at line 1
 SELECT (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 LIMIT 1);
 ERROR HY000: Incorrect usage of UNION and LIMIT
 SELECT 1 FROM (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 LIMIT 1) a;
-ERROR HY000: Incorrect usage of UNION and LIMIT
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1 LIMIT 1) a' at line 1
 SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 ORDER BY 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1 ORDER BY 1' at line 1
 SELECT (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 ORDER BY 1);
 ERROR HY000: Incorrect usage of UNION and LIMIT
 SELECT 1 FROM (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 ORDER BY 1) a;
-ERROR HY000: Incorrect usage of UNION and LIMIT
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1 ORDER BY 1) a' at line 1
 SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 LIMIT 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1 LIMIT 1' at line 1
 SELECT (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 LIMIT 1);
 ERROR HY000: Incorrect usage of UNION and ORDER BY
 SELECT 1 FROM (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 LIMIT 1) a;
-ERROR HY000: Incorrect usage of UNION and ORDER BY
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'UNION SELECT 1 FROM t1 LIMIT 1) a' at line 1
 DROP TABLE t1;
 #
 # MDEV-8380: Subquery parse error

mysql-test/r/subselect.result

@@ -5188,9 +5188,9 @@ a	1
 SELECT * FROM t1 JOIN ((SELECT 1 UNION SELECT 1)) ON 1;
 ERROR 42000: Every derived table must have its own alias
 SELECT * FROM t1 JOIN  (t1 t1a UNION SELECT 1)  ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')  ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)  ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a UNION SELECT 1)) ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')) ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)) ON 1' at line 1
 SELECT * FROM t1 JOIN  (t1 t1a)  t1a ON 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 't1a ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a)) t1a ON 1;

mysql-test/r/subselect_no_exists_to_in.result

@@ -5190,9 +5190,9 @@ a	1
 SELECT * FROM t1 JOIN ((SELECT 1 UNION SELECT 1)) ON 1;
 ERROR 42000: Every derived table must have its own alias
 SELECT * FROM t1 JOIN  (t1 t1a UNION SELECT 1)  ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')  ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)  ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a UNION SELECT 1)) ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')) ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)) ON 1' at line 1
 SELECT * FROM t1 JOIN  (t1 t1a)  t1a ON 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 't1a ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a)) t1a ON 1;

mysql-test/r/subselect_no_mat.result

@@ -5188,9 +5188,9 @@ a	1
 SELECT * FROM t1 JOIN ((SELECT 1 UNION SELECT 1)) ON 1;
 ERROR 42000: Every derived table must have its own alias
 SELECT * FROM t1 JOIN  (t1 t1a UNION SELECT 1)  ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')  ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)  ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a UNION SELECT 1)) ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')) ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)) ON 1' at line 1
 SELECT * FROM t1 JOIN  (t1 t1a)  t1a ON 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 't1a ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a)) t1a ON 1;

mysql-test/r/subselect_no_opts.result

@@ -5184,9 +5184,9 @@ a	1
 SELECT * FROM t1 JOIN ((SELECT 1 UNION SELECT 1)) ON 1;
 ERROR 42000: Every derived table must have its own alias
 SELECT * FROM t1 JOIN  (t1 t1a UNION SELECT 1)  ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')  ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)  ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a UNION SELECT 1)) ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')) ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)) ON 1' at line 1
 SELECT * FROM t1 JOIN  (t1 t1a)  t1a ON 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 't1a ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a)) t1a ON 1;

mysql-test/r/subselect_no_scache.result

@@ -5194,9 +5194,9 @@ a	1
 SELECT * FROM t1 JOIN ((SELECT 1 UNION SELECT 1)) ON 1;
 ERROR 42000: Every derived table must have its own alias
 SELECT * FROM t1 JOIN  (t1 t1a UNION SELECT 1)  ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')  ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)  ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a UNION SELECT 1)) ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')) ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)) ON 1' at line 1
 SELECT * FROM t1 JOIN  (t1 t1a)  t1a ON 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 't1a ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a)) t1a ON 1;

mysql-test/r/subselect_no_semijoin.result

@@ -5184,9 +5184,9 @@ a	1
 SELECT * FROM t1 JOIN ((SELECT 1 UNION SELECT 1)) ON 1;
 ERROR 42000: Every derived table must have its own alias
 SELECT * FROM t1 JOIN  (t1 t1a UNION SELECT 1)  ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')  ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)  ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a UNION SELECT 1)) ON 1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')) ON 1' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'SELECT 1)) ON 1' at line 1
 SELECT * FROM t1 JOIN  (t1 t1a)  t1a ON 1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 't1a ON 1' at line 1
 SELECT * FROM t1 JOIN ((t1 t1a)) t1a ON 1;

mysql-test/t/parser.test

@@ -951,23 +951,23 @@ let $q=SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1;
 eval $q;
 --error ER_WRONG_USAGE
 eval SELECT ($q);
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;
 
 let $q=SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1;
 --error ER_PARSE_ERROR
 eval $q;
 --error ER_WRONG_USAGE
 eval SELECT ($q);
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;
 
 let $q=SELECT 1 FROM t1 ORDER BY 1 LIMIT 1 UNION SELECT 1 FROM t1;
 --error ER_PARSE_ERROR
 eval $q;
 --error ER_WRONG_USAGE
 eval SELECT ($q);
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;
 
 let $q=SELECT 1 FROM t1 LIMIT 1 ORDER BY 1 UNION SELECT 1 FROM t1;
@@ -983,31 +983,31 @@ let $q=SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 ORDER BY 1;
 eval $q;
 --error ER_WRONG_USAGE
 eval SELECT ($q);
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;
 
 let $q=SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 LIMIT 1;
 --error ER_PARSE_ERROR
 eval $q;
 --error ER_WRONG_USAGE
 eval SELECT ($q);
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;
 
 let $q=SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 ORDER BY 1;
 --error ER_PARSE_ERROR
 eval $q;
 --error ER_WRONG_USAGE
 eval SELECT ($q);
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;
 
 let $q=SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 LIMIT 1;
 --error ER_PARSE_ERROR
 eval $q;
 --error ER_WRONG_USAGE
 eval SELECT ($q);
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;
 
 DROP TABLE t1;

sql/sql_yacc.yy

@@ -1882,6 +1882,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
         table_primary_ident table_primary_derived
         select_derived derived_table_list
         select_derived_union
+        derived_query_specification
 
 %type <date_time_type> date_time_type;
 %type <interval> interval
@@ -11113,34 +11114,39 @@ table_primary_derived:
   subqueries have their own union rules.
 */
 select_derived_union:
-          select_derived opt_union_order_or_limit
+          select_derived
+        | select_derived union_order_or_limit
           {
-            if ($1 && $2)
+            if ($1)
             {
               my_parse_error(thd, ER_SYNTAX_ERROR);
               MYSQL_YYABORT;
             }
           }
-        | derived_query_specification
-          opt_order_clause
-          opt_limit_clause
-          opt_select_lock_type
-          { $$= NULL; }
-        | select_derived_union union_head_non_top query_term
+        | select_derived union_head_non_top
           {
-            /*
-              Remove from the name resolution context stack the context of the
-              last select in the union.
-             */
-            Lex->pop_context();
-
-            if ($1 != NULL)
+            if ($1)
             {
               my_parse_error(thd, ER_SYNTAX_ERROR);
               MYSQL_YYABORT;
             }
           }
-        ;
+          union_list_derived_part2
+        | derived_query_specification opt_select_lock_type
+        | derived_query_specification order_or_limit opt_select_lock_type
+        | derived_query_specification opt_select_lock_type union_list_derived
+       ;
+
+union_list_derived_part2:
+         query_term_union_not_ready { Lex->pop_context(); }
+       | query_term_union_ready     { Lex->pop_context(); }
+       | query_term_union_ready     { Lex->pop_context(); } union_list_derived
+       ;
+
+union_list_derived:
+         union_head_non_top union_list_derived_part2
+       ;
+
 
 /* The equivalent of select_init2 for nested queries. */
 select_init2_derived:
@@ -11206,6 +11212,7 @@ derived_query_specification:
                 MYSQL_YYABORT;
               }
             }
+            $$= NULL;
           }
         ;
 
@@ -16398,12 +16405,18 @@ query_specification:
         ;
 
 query_term:
-          query_specification
-          opt_order_clause
-          opt_limit_clause
-          opt_select_lock_type
+          query_term_union_ready
+        | query_term_union_not_ready
+        ;
+
+query_term_union_not_ready:
+          query_specification order_or_limit opt_select_lock_type
+        | '(' select_paren_derived ')' union_order_or_limit
+        ;
+
+query_term_union_ready:
+          query_specification opt_select_lock_type
         | '(' select_paren_derived ')'
-          opt_union_order_or_limit
         ;
 
 query_expression_body: