MDEV-17693 Shift/reduce conflicts for NAMES,ROLE,PASSWORD in the option_value_no_option_type grammar

mysql-test/main/parser.result

@@ -1700,4 +1700,69 @@ SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT
 (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT
 (SELECT
 1
+#
+# MDEV-17693 Shift/reduce conflicts for NAMES,ROLE,PASSWORD in the option_value_no_option_type grammar
+#
+CREATE TABLE names (names INT);
+SELECT names FROM names AS names;
+names
+DROP TABLE names;
+CREATE TABLE password (password INT);
+SELECT password FROM password AS password;
+password
+DROP TABLE password;
+CREATE TABLE role (role INT);
+SELECT role FROM role AS role;
+role
+DROP TABLE role;
+BEGIN NOT ATOMIC
+DECLARE names    VARCHAR(32) DEFAULT '[names]';
+DECLARE password VARCHAR(32) DEFAULT '[password]';
+DECLARE role     VARCHAR(32) DEFAULT '[role]';
+names:
+LOOP
+SELECT names;
+LEAVE names;
+END LOOP;
+password:
+LOOP
+SELECT password;
+LEAVE password;
+END LOOP;
+role:
+LOOP
+SELECT role;
+LEAVE role;
+END LOOP;
+END;
+$$
+names
+[names]
+password
+[password]
+role
+[role]
+BEGIN NOT ATOMIC
+DECLARE names VARCHAR(32);
+SET names='[names]';
+END;
+$$
+ERROR 42000: Variable 'names' must be quoted with `...`, or renamed
+BEGIN NOT ATOMIC
+DECLARE password VARCHAR(32);
+SET password='[password]';
+END;
+$$
+ERROR 42000: Variable 'password' must be quoted with `...`, or renamed
+BEGIN NOT ATOMIC
+DECLARE role VARCHAR(32);
+SET role='[role]';
+END;
+$$
+SELECT @@GLOBAL.names;
+ERROR HY000: Unknown system variable 'names'
+SELECT @@GLOBAL.password;
+ERROR HY000: Unknown system variable 'password'
+SELECT @@GLOBAL.role;
+ERROR HY000: Unknown system variable 'role'
 End of 10.3 tests

mysql-test/main/parser.test

@@ -1459,4 +1459,78 @@ DROP PROCEDURE p1;
 (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT
 1
 )))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))));
+
+--echo #
+--echo # MDEV-17693 Shift/reduce conflicts for NAMES,ROLE,PASSWORD in the option_value_no_option_type grammar
+--echo #
+
+CREATE TABLE names (names INT);
+SELECT names FROM names AS names;
+DROP TABLE names;
+
+CREATE TABLE password (password INT);
+SELECT password FROM password AS password;
+DROP TABLE password;
+
+CREATE TABLE role (role INT);
+SELECT role FROM role AS role;
+DROP TABLE role;
+
+DELIMITER $$;
+BEGIN NOT ATOMIC
+  DECLARE names    VARCHAR(32) DEFAULT '[names]';
+  DECLARE password VARCHAR(32) DEFAULT '[password]';
+  DECLARE role     VARCHAR(32) DEFAULT '[role]';
+names:
+  LOOP
+    SELECT names;
+    LEAVE names;
+  END LOOP;
+password:
+  LOOP
+    SELECT password;
+    LEAVE password;
+  END LOOP;
+role:
+  LOOP
+    SELECT role;
+    LEAVE role;
+  END LOOP;
+END;
+$$
+DELIMITER ;$$
+
+DELIMITER $$;
+--error ER_SP_BAD_VAR_SHADOW
+BEGIN NOT ATOMIC
+  DECLARE names VARCHAR(32);
+  SET names='[names]';
+END;
+$$
+DELIMITER ;$$
+
+DELIMITER $$;
+--error ER_SP_BAD_VAR_SHADOW
+BEGIN NOT ATOMIC
+  DECLARE password VARCHAR(32);
+  SET password='[password]';
+END;
+$$
+DELIMITER ;$$
+
+DELIMITER $$;
+BEGIN NOT ATOMIC
+  DECLARE role VARCHAR(32);
+  SET role='[role]';
+END;
+$$
+DELIMITER ;$$
+
+--error ER_UNKNOWN_SYSTEM_VARIABLE
+SELECT @@GLOBAL.names;
+--error ER_UNKNOWN_SYSTEM_VARIABLE
+SELECT @@GLOBAL.password;
+--error ER_UNKNOWN_SYSTEM_VARIABLE
+SELECT @@GLOBAL.role;
+
 --echo End of 10.3 tests

mysql-test/suite/compat/oracle/r/parser.result

@@ -546,3 +546,66 @@ BEGIN
 NULL;
 END;
 /
+#
+# MDEV-17693 Shift/reduce conflicts for NAMES,ROLE,PASSWORD in the option_value_no_option_type grammar
+#
+CREATE TABLE names (names INT);
+SELECT names FROM names AS names;
+names
+DROP TABLE names;
+CREATE TABLE password (password INT);
+SELECT password FROM password AS password;
+password
+DROP TABLE password;
+CREATE TABLE role (role INT);
+SELECT role FROM role AS role;
+role
+DROP TABLE role;
+DECLARE
+names    VARCHAR(32) DEFAULT '[names]';
+password VARCHAR(32) DEFAULT '[password]';
+role     VARCHAR(32) DEFAULT '[role]';
+BEGIN
+<<names>>
+SELECT names;
+<<password>>
+SELECT password;
+<<role>>
+SELECT role;
+END;
+$$
+names
+[names]
+password
+[password]
+role
+[role]
+DECLARE
+names VARCHAR(32);
+BEGIN
+SET names='[names]';
+END;
+$$
+ERROR 42000: Variable 'names' must be quoted with `...`, or renamed
+DECLARE
+password VARCHAR(32);
+BEGIN
+SET password='[password]';
+END;
+$$
+ERROR 42000: Variable 'password' must be quoted with `...`, or renamed
+DECLARE
+role VARCHAR(32);
+BEGIN
+SET role='[role]';
+END;
+$$
+SELECT @@GLOBAL.names;
+ERROR HY000: Unknown system variable 'names'
+SELECT @@GLOBAL.password;
+ERROR HY000: Unknown system variable 'password'
+SELECT @@GLOBAL.role;
+ERROR HY000: Unknown system variable 'role'
+#
+# End of 10.3 tests
+#

mysql-test/suite/compat/oracle/t/parser.test

@@ -339,3 +339,76 @@ END;
 /
 DELIMITER ;/
 
+
+--echo #
+--echo # MDEV-17693 Shift/reduce conflicts for NAMES,ROLE,PASSWORD in the option_value_no_option_type grammar
+--echo #
+
+CREATE TABLE names (names INT);
+SELECT names FROM names AS names;
+DROP TABLE names;
+
+CREATE TABLE password (password INT);
+SELECT password FROM password AS password;
+DROP TABLE password;
+
+CREATE TABLE role (role INT);
+SELECT role FROM role AS role;
+DROP TABLE role;
+
+DELIMITER $$;
+DECLARE
+  names    VARCHAR(32) DEFAULT '[names]';
+  password VARCHAR(32) DEFAULT '[password]';
+  role     VARCHAR(32) DEFAULT '[role]';
+BEGIN
+<<names>>
+   SELECT names;
+<<password>>
+   SELECT password;
+<<role>>
+  SELECT role;
+END;
+$$
+DELIMITER ;$$
+
+DELIMITER $$;
+--error ER_SP_BAD_VAR_SHADOW
+DECLARE
+  names VARCHAR(32);
+BEGIN
+  SET names='[names]';
+END;
+$$
+DELIMITER ;$$
+
+DELIMITER $$;
+--error ER_SP_BAD_VAR_SHADOW
+DECLARE
+  password VARCHAR(32);
+BEGIN
+  SET password='[password]';
+END;
+$$
+DELIMITER ;$$
+
+DELIMITER $$;
+DECLARE
+  role VARCHAR(32);
+BEGIN
+  SET role='[role]';
+END;
+$$
+DELIMITER ;$$
+
+--error ER_UNKNOWN_SYSTEM_VARIABLE
+SELECT @@GLOBAL.names;
+--error ER_UNKNOWN_SYSTEM_VARIABLE
+SELECT @@GLOBAL.password;
+--error ER_UNKNOWN_SYSTEM_VARIABLE
+SELECT @@GLOBAL.role;
+
+
+--echo #
+--echo # End of 10.3 tests
+--echo #

sql/sql_yacc.yy

@@ -884,10 +884,10 @@ bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
 %parse-param { THD *thd }
 %lex-param { THD *thd }
 /*
-  Currently there are 56 shift/reduce conflicts.
+  Currently there are 52 shift/reduce conflicts.
   We should not introduce new conflicts any more.
 */
-%expect 56
+%expect 52
 
 /*
    Comments for TOKENS.
@@ -1807,6 +1807,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
         ident
         label_ident
         sp_decl_ident
+        ident_set_usual_case
         ident_or_empty
         ident_table_alias
         ident_sysvar_name
@@ -1828,6 +1829,8 @@ bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
         keyword_data_type
         keyword_ident
         keyword_label
+        keyword_set_special_case
+        keyword_set_usual_case
         keyword_sp_block_section
         keyword_sp_decl
         keyword_sp_head
@@ -15509,6 +15512,14 @@ ident_table_alias:
           }
         ;
 
+ident_set_usual_case:
+          IDENT_sys
+        | keyword_set_usual_case
+          {
+            if (unlikely($$.copy_keyword(thd, &$1)))
+              MYSQL_YYABORT;
+          }
+        ;
 
 ident_sysvar_name:
           IDENT_sys
@@ -15616,6 +15627,7 @@ user: user_maybe_role
 /* Keywords which we allow as table aliases. */
 keyword_table_alias:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_block_section
         | keyword_sp_head
         | keyword_sp_var_and_label
@@ -15627,6 +15639,7 @@ keyword_table_alias:
 /* Keyword that we allow for identifiers (except SP labels) */
 keyword_ident:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_block_section
         | keyword_sp_head
         | keyword_sp_var_and_label
@@ -15642,12 +15655,14 @@ keyword_ident:
 */
 keyword_label:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_var_and_label
         | keyword_sysvar_type
         ;
 
 keyword_sysvar_name:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_block_section
         | keyword_sp_head
         | keyword_sp_var_and_label
@@ -15658,6 +15673,18 @@ keyword_sysvar_name:
 
 keyword_sp_decl:
           keyword_data_type
+        | keyword_set_special_case
+        | keyword_sp_block_section
+        | keyword_sp_head
+        | keyword_sp_var_and_label
+        | keyword_sp_var_not_label
+        | keyword_sysvar_type
+        | keyword_verb_clause
+        | WINDOW_SYM
+        ;
+
+keyword_set_usual_case:
+          keyword_data_type
         | keyword_sp_block_section
         | keyword_sp_head
         | keyword_sp_var_and_label
@@ -15799,6 +15826,12 @@ keyword_verb_clause:
         | TRUNCATE_SYM          /* Verb clause. Reserved in Oracle */
         ;
 
+keyword_set_special_case:
+          NAMES_SYM
+        | ROLE_SYM
+        | PASSWORD_SYM
+        ;
+
 /*
   Keywords that start an SP block section.
 */
@@ -16036,7 +16069,6 @@ keyword_sp_var_and_label:
         | MYSQL_SYM
         | MYSQL_ERRNO_SYM
         | NAME_SYM
-        | NAMES_SYM
         | NEXT_SYM           %prec PREC_BELOW_CONTRACTION_TOKEN2
         | NEXTVAL_SYM
         | NEW_SYM
@@ -16061,7 +16093,6 @@ keyword_sp_var_and_label:
         | PARTIAL
         | PARTITIONING_SYM
         | PARTITIONS_SYM
-        | PASSWORD_SYM
         | PERSISTENT_SYM
         | PHASE_SYM
         | PLUGIN_SYM
@@ -16101,7 +16132,6 @@ keyword_sp_var_and_label:
         | RETURNS_SYM
         | REUSE_SYM
         | REVERSE_SYM
-        | ROLE_SYM
         | ROLLUP_SYM
         | ROUTINE_SYM
         | ROWCOUNT_SYM
@@ -16345,7 +16375,7 @@ option_value_following_option_type:
 
 /* Option values without preceding option_type. */
 option_value_no_option_type:
-          ident equal set_expr_or_default
+          ident_set_usual_case equal set_expr_or_default
           {
             if (unlikely(Lex->set_variable(&$1, $3)))
               MYSQL_YYABORT;
@@ -16462,6 +16492,11 @@ option_value_no_option_type:
                 unlikely(lex->var_list.push_back(var, thd->mem_root)))
               MYSQL_YYABORT;
           }
+        | ROLE_SYM equal set_expr_or_default
+          {
+            if (unlikely(Lex->set_variable(&$1, $3)))
+              MYSQL_YYABORT;
+          }
         | PASSWORD_SYM opt_for_user text_or_password
           {
             LEX *lex = Lex;

sql/sql_yacc_ora.yy

@@ -278,10 +278,10 @@ bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
 %parse-param { THD *thd }
 %lex-param { THD *thd }
 /*
-  Currently there are 57 shift/reduce conflicts.
+  Currently there are 53 shift/reduce conflicts.
   We should not introduce new conflicts any more.
 */
-%expect 57
+%expect 53
 
 /*
    Comments for TOKENS.
@@ -1203,6 +1203,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
         ident
         label_ident
         sp_decl_ident
+        ident_set_usual_case
         ident_or_empty
         ident_table_alias
         ident_sysvar_name
@@ -1225,6 +1226,8 @@ bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
         keyword_data_type
         keyword_ident
         keyword_label
+        keyword_set_special_case
+        keyword_set_usual_case
         keyword_sp_block_section
         keyword_sp_decl
         keyword_sp_head
@@ -15477,6 +15480,14 @@ ident_table_alias:
           }
         ;
 
+ident_set_usual_case:
+          IDENT_sys
+        | keyword_set_usual_case
+          {
+            if (unlikely($$.copy_keyword(thd, &$1)))
+              MYSQL_YYABORT;
+          }
+        ;
 
 ident_sysvar_name:
           IDENT_sys
@@ -15608,6 +15619,7 @@ user: user_maybe_role
 /* Keywords which we allow as table aliases. */
 keyword_table_alias:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_block_section
         | keyword_sp_head
         | keyword_sp_var_and_label
@@ -15620,6 +15632,7 @@ keyword_table_alias:
 /* Keyword that we allow for identifiers (except SP labels) */
 keyword_ident:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_block_section
         | keyword_sp_head
         | keyword_sp_var_and_label
@@ -15636,6 +15649,7 @@ keyword_ident:
 */
 keyword_label:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_var_and_label
         | keyword_sysvar_type
         | FUNCTION_SYM
@@ -15643,6 +15657,7 @@ keyword_label:
 
 keyword_sysvar_name:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_block_section
         | keyword_sp_head
         | keyword_sp_var_and_label
@@ -15654,6 +15669,7 @@ keyword_sysvar_name:
 
 keyword_sp_decl:
           keyword_sp_head
+        | keyword_set_special_case
         | keyword_sp_var_and_label
         | keyword_sp_var_not_label
         | keyword_sysvar_type
@@ -15661,8 +15677,21 @@ keyword_sp_decl:
         | WINDOW_SYM
         ;
 
+keyword_set_usual_case:
+          keyword_data_type
+        | keyword_sp_block_section
+        | keyword_sp_head
+        | keyword_sp_var_and_label
+        | keyword_sp_var_not_label
+        | keyword_sysvar_type
+        | keyword_verb_clause
+        | FUNCTION_SYM
+        | WINDOW_SYM
+        ;
+
 keyword_directly_assignable:
           keyword_data_type
+        | keyword_set_special_case
         | keyword_sp_var_and_label
         | keyword_sp_var_not_label
         | keyword_sysvar_type
@@ -15802,6 +15831,12 @@ keyword_verb_clause:
         | TRUNCATE_SYM          /* Verb clause. Reserved in Oracle */
         ;
 
+keyword_set_special_case:
+          NAMES_SYM
+        | ROLE_SYM
+        | PASSWORD_SYM
+        ;
+
 /*
   Keywords that start an SP block section.
 */
@@ -16039,7 +16074,6 @@ keyword_sp_var_and_label:
         | MYSQL_SYM
         | MYSQL_ERRNO_SYM
         | NAME_SYM
-        | NAMES_SYM
         | NEXT_SYM           %prec PREC_BELOW_CONTRACTION_TOKEN2
         | NEXTVAL_SYM
         | NEW_SYM
@@ -16064,7 +16098,6 @@ keyword_sp_var_and_label:
         | PARTIAL
         | PARTITIONING_SYM
         | PARTITIONS_SYM
-        | PASSWORD_SYM
         | PERSISTENT_SYM
         | PHASE_SYM
         | PLUGIN_SYM
@@ -16104,7 +16137,6 @@ keyword_sp_var_and_label:
         | RETURNS_SYM
         | REUSE_SYM
         | REVERSE_SYM
-        | ROLE_SYM
         | ROLLUP_SYM
         | ROUTINE_SYM
         | ROWCOUNT_SYM
@@ -16397,7 +16429,7 @@ option_value_following_option_type:
 
 /* Option values without preceding option_type. */
 option_value_no_option_type:
-          ident equal set_expr_or_default
+          ident_set_usual_case equal set_expr_or_default
           {
             if (unlikely(Lex->set_variable(&$1, $3)))
               MYSQL_YYABORT;
@@ -16514,6 +16546,11 @@ option_value_no_option_type:
                 unlikely(lex->var_list.push_back(var, thd->mem_root)))
               MYSQL_YYABORT;
           }
+        | ROLE_SYM equal set_expr_or_default
+          {
+            if (unlikely(Lex->set_variable(&$1, $3)))
+              MYSQL_YYABORT;
+          }
         | PASSWORD_SYM opt_for_user text_or_password
           {
             LEX *lex = Lex;