MDEV-10051 Fix subselect to return a syntax error instead of "Incorre…

…ct usage of UNION and LIMIT"

mysql-test/r/parser.result

@@ -820,19 +820,19 @@ ERROR 42000: You have an error in your SQL syntax; check the manual that corresp
 SELECT 1 FROM t1 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 'UNION SELECT 1 FROM t1' at line 1
 SELECT (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1);
-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)' at line 1
 SELECT 1 FROM (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1) a;
 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
+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 1 FROM (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1) a;
 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
+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 1 FROM (SELECT 1 FROM t1 ORDER BY 1 LIMIT 1 UNION SELECT 1 FROM t1) a;
 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;
@@ -844,25 +844,25 @@ ERROR 42000: You have an error in your SQL syntax; check the manual that corresp
 SELECT 1 FROM t1 ORDER BY 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 ORDER BY 1 UNION SELECT 1 FROM t1 ORDER BY 1);
-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)' at line 1
 SELECT 1 FROM (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 ORDER BY 1) a;
 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
+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 1 FROM (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 LIMIT 1) a;
 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
+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 1 FROM (SELECT 1 FROM t1 LIMIT 1 UNION SELECT 1 FROM t1 ORDER BY 1) a;
 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
+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 1 FROM (SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 LIMIT 1) a;
 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;

mysql-test/r/subselect.result

@@ -1056,7 +1056,7 @@ create table t1 (a float);
 select 10.5 IN (SELECT * from t1 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
-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 1.5)' at line 1
 select 10.5 IN (SELECT * from t1 UNION SELECT 1.5 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 drop table t1;

mysql-test/r/subselect_no_exists_to_in.result

@@ -1060,7 +1060,7 @@ create table t1 (a float);
 select 10.5 IN (SELECT * from t1 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
-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 1.5)' at line 1
 select 10.5 IN (SELECT * from t1 UNION SELECT 1.5 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 drop table t1;

mysql-test/r/subselect_no_mat.result

@@ -1063,7 +1063,7 @@ create table t1 (a float);
 select 10.5 IN (SELECT * from t1 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
-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 1.5)' at line 1
 select 10.5 IN (SELECT * from t1 UNION SELECT 1.5 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 drop table t1;

mysql-test/r/subselect_no_opts.result

@@ -1059,7 +1059,7 @@ create table t1 (a float);
 select 10.5 IN (SELECT * from t1 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
-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 1.5)' at line 1
 select 10.5 IN (SELECT * from t1 UNION SELECT 1.5 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 drop table t1;

mysql-test/r/subselect_no_scache.result

@@ -1062,7 +1062,7 @@ create table t1 (a float);
 select 10.5 IN (SELECT * from t1 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
-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 1.5)' at line 1
 select 10.5 IN (SELECT * from t1 UNION SELECT 1.5 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 drop table t1;

mysql-test/r/subselect_no_semijoin.result

@@ -1059,7 +1059,7 @@ create table t1 (a float);
 select 10.5 IN (SELECT * from t1 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
-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 1.5)' at line 1
 select 10.5 IN (SELECT * from t1 UNION SELECT 1.5 LIMIT 1);
 ERROR 42000: This version of MariaDB doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery'
 drop table t1;

mysql-test/t/parser.test

@@ -949,23 +949,23 @@ eval SELECT 1 FROM ($q) a;
 let $q=SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1;
 --error ER_PARSE_ERROR
 eval $q;
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT ($q);
 --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 $q;
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT ($q);
 --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 $q;
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT ($q);
 --error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;
@@ -981,31 +981,31 @@ eval SELECT 1 FROM ($q) a;
 let $q=SELECT 1 FROM t1 ORDER BY 1 UNION SELECT 1 FROM t1 ORDER BY 1;
 --error ER_PARSE_ERROR
 eval $q;
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT ($q);
 --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 $q;
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT ($q);
 --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 $q;
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT ($q);
 --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 $q;
---error ER_WRONG_USAGE
+--error ER_PARSE_ERROR
 eval SELECT ($q);
 --error ER_PARSE_ERROR
 eval SELECT 1 FROM ($q) a;

mysql-test/t/subselect.test

@@ -569,7 +569,7 @@ drop table t1, t2;
 create table t1 (a float);
 -- error ER_NOT_SUPPORTED_YET
 select 10.5 IN (SELECT * from t1 LIMIT 1);
--- error ER_WRONG_USAGE
+-- error ER_PARSE_ERROR
 select 10.5 IN (SELECT * from t1 LIMIT 1 UNION SELECT 1.5);
 -- error ER_NOT_SUPPORTED_YET
 select 10.5 IN (SELECT * from t1 UNION SELECT 1.5 LIMIT 1);

sql/sql_yacc.yy

@@ -1883,7 +1883,6 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
         select_derived derived_table_list
         select_derived_union
         derived_query_specification
-
 %type <date_time_type> date_time_type;
 %type <interval> interval
 
@@ -1922,7 +1921,11 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 
 %type <select_lex> subselect
         get_select_lex get_select_lex_derived
+        query_specification
+        query_term_union_not_ready
+        query_term_union_ready
         query_expression_body
+        select_paren_derived
 
 %type <boolfunc2creator> comp_op
 
@@ -8555,8 +8558,9 @@ select_paren_derived:
           {
             if (setup_select_in_parentheses(Lex))
               MYSQL_YYABORT;
+            $$= Lex->current_select->master_unit()->first_select();
           }
-        | '(' select_paren_derived ')'
+        | '(' select_paren_derived ')'  { $$= $2; }
         ;
 
 select_init3:
@@ -16402,33 +16406,25 @@ union_option:
 */
 query_specification:
           SELECT_SYM select_init2_derived opt_table_expression
-        ;
-
-query_term:
-          query_term_union_ready
-        | query_term_union_not_ready
+          {
+            $$= Lex->current_select->master_unit()->first_select();
+          }
         ;
 
 query_term_union_not_ready:
-          query_specification order_or_limit opt_select_lock_type
-        | '(' select_paren_derived ')' union_order_or_limit
+          query_specification order_or_limit opt_select_lock_type { $$= $1; }
+        | '(' select_paren_derived ')' union_order_or_limit       { $$= $2; }
         ;
 
 query_term_union_ready:
-          query_specification opt_select_lock_type
-        | '(' select_paren_derived ')'
+          query_specification opt_select_lock_type                { $$= $1; }
+        | '(' select_paren_derived ')'                            { $$= $2; }
         ;
 
 query_expression_body:
-          query_term
-          {
-            $$= Lex->current_select->master_unit()->first_select();
-          }
-        | query_expression_body union_head_non_top query_term
-          {
-            Lex->pop_context();
-            $$= $1;
-          }
+          query_term_union_not_ready                                { $$= $1; }
+        | query_term_union_ready                                    { $$= $1; }
+        | query_term_union_ready union_list_derived                 { $$= $1; }
         ;
 
 /* Corresponds to <query expression> in the SQL:2003 standard. */