MDEV-17677: Fix keyword parsing that treated as identifier when immediately followed by dot

mysql-test/main/parser.result

@@ -2269,3 +2269,42 @@ $$
 #
 # End of 10.6 tests
 #
+#
+# MDEV-17677 : Keywords are parsed as identifiers when followed by a dot
+#
+test for Nd (should work)
+SELECT.1;
+.1
+0.1
+SELECT.123+0;
+.123+0
+0.123
+SELECT.5 * 2;
+.5 * 2
+1.0
+test for Mn
+SELECT.́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.�\00811' at line 1
+SELECT.̈abc;
+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.̈abc' at line 1
+test for Mc
+SELECT.ःtest;
+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.ःtest' at line 1
+test for Pc
+SELECT.‿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 'SELECT.‿a' at line 1
+test for Cf
+SELECT.‎abc;
+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.‎abc' at line 1
+test for Middle-dot and underscore
+SELECT.·123;
+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.·123' at line 1
+ٍSELECT._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 '�\008DSELECT._1' at line 1
+still work as identifier
+CREATE TABLE `SELECT` (a INT);
+INSERT INTO `SELECT` VALUES (5);
+SELECT `SELECT`.a FROM `SELECT`;
+a
+5
+DROP TABLE `SELECT`;

mysql-test/main/parser.test

@@ -2067,3 +2067,46 @@ DELIMITER ;$$
 --echo #
 --echo # End of 10.6 tests
 --echo #
+
+--echo #
+--echo # MDEV-17677 : Keywords are parsed as identifiers when followed by a dot
+--echo #
+
+--echo  test for Nd (should work)
+SELECT.1;
+SELECT.123+0;
+SELECT.5 * 2;
+
+--character_set utf8mb4
+--echo  test for Mn
+--error ER_PARSE_ERROR
+SELECT.́1;
+
+--error ER_PARSE_ERROR
+SELECT.̈abc;
+
+
+-- echo  test for Mc
+--error ER_PARSE_ERROR
+SELECT.ःtest;
+
+--echo  test for Pc
+--error ER_PARSE_ERROR
+SELECT.‿a;
+
+--echo  test for Cf
+--error ER_PARSE_ERROR
+SELECT.‎abc;
+
+--echo  test for Middle-dot and underscore
+--error ER_PARSE_ERROR
+SELECT.·123;
+--error ER_PARSE_ERROR
+ٍSELECT._1;
+
+--echo  still work as identifier
+CREATE TABLE `SELECT` (a INT);
+INSERT INTO `SELECT` VALUES (5);
+SELECT `SELECT`.a FROM `SELECT`;
+DROP TABLE `SELECT`;
+

mysql-test/suite/funcs_1/r/innodb_trig_0407.result

@@ -138,7 +138,7 @@ create table t1_433a (f1a char (5)) engine = <engine_to_be_used>;
 CREATE TRIGGER trg3 BEFORE INSERT on t1_433 for each row
 set new.f1 = 'Trigger 3.5.4.3';
 Drop trigger t1.433.trg3;
-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 '.trg3' 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 '.433.trg3' at line 1
 Drop trigger db_drop3.t1.433.trg3;
 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 '.433.trg3' at line 1
 Drop trigger mysql.trg3;

mysql-test/suite/funcs_1/r/memory_trig_0407.result

@@ -138,7 +138,7 @@ create table t1_433a (f1a char (5)) engine = <engine_to_be_used>;
 CREATE TRIGGER trg3 BEFORE INSERT on t1_433 for each row
 set new.f1 = 'Trigger 3.5.4.3';
 Drop trigger t1.433.trg3;
-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 '.trg3' 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 '.433.trg3' at line 1
 Drop trigger db_drop3.t1.433.trg3;
 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 '.433.trg3' at line 1
 Drop trigger mysql.trg3;

mysql-test/suite/funcs_1/r/myisam_trig_0407.result

@@ -138,7 +138,7 @@ create table t1_433a (f1a char (5)) engine = <engine_to_be_used>;
 CREATE TRIGGER trg3 BEFORE INSERT on t1_433 for each row
 set new.f1 = 'Trigger 3.5.4.3';
 Drop trigger t1.433.trg3;
-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 '.trg3' 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 '.433.trg3' at line 1
 Drop trigger db_drop3.t1.433.trg3;
 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 '.433.trg3' at line 1
 Drop trigger mysql.trg3;

sql/sql_lex.cc

@@ -2851,7 +2851,7 @@ int Lex_input_stream::scan_ident_middle(THD *thd, Lex_ident_cli_st *str,
         yylineno++;
     }
   }
-  if (start == get_ptr() && c == '.' && ident_map[(uchar) yyPeek()])
+  if (start == get_ptr() && c == '.' && ident_map[(uchar) yyPeek()] && !my_isdigit(cs, yyPeek()))
     next_state= MY_LEX_IDENT_SEP;
   else
   {                                    // '(' must follow directly if function
@@ -12439,4 +12439,4 @@ bool SELECT_LEX_UNIT::is_derived_eliminated() const
   if (!derived->table)
     return true;
   return derived->table->map & outer_select()->join->eliminated_tables;
-}
+}