Bug#39793 Foreign keys not constructed when column has a '#' in a comment or default value

Internal InnoDN FK parser does not recognize '\'' as quotation symbol.
Suggested fix is to add '\'' symbol check for quotation condition
(dict_strip_comments() function).

innobase/dict/dict0dict.c

@@ -2829,7 +2829,7 @@ dict_strip_comments(
 		} else if (quote) {
 			/* Within quotes: do not look for
 			starting quotes or comments. */
-		} else if (*sptr == '"' || *sptr == '`') {
+		} else if (*sptr == '"' || *sptr == '`' || *sptr == '\'') {
 			/* Starting quote: remember the quote character. */
 			quote = *sptr;
 		} else if (*sptr == '#'

mysql-test/r/innodb_mysql.result

@@ -1291,4 +1291,16 @@ SAVEPOINT s4;
 ROLLBACK;
 ROLLBACK TO SAVEPOINT s4;
 ERROR 42000: SAVEPOINT s4 does not exist
+CREATE TABLE t1 (f1 INTEGER PRIMARY KEY COMMENT 'My ID#', f2 INTEGER DEFAULT NULL, f3 CHAR(10) DEFAULT 'My ID#', CONSTRAINT f2_ref FOREIGN KEY (f2) REFERENCES t1 (f1)) ENGINE=INNODB;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `f1` int(11) NOT NULL COMMENT 'My ID#',
+  `f2` int(11) default NULL,
+  `f3` char(10) default 'My ID#',
+  PRIMARY KEY  (`f1`),
+  KEY `f2_ref` (`f2`),
+  CONSTRAINT `f2_ref` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+DROP TABLE t1;
 End of 5.0 tests

mysql-test/t/innodb_mysql.test

@@ -1054,4 +1054,13 @@ ROLLBACK;
 --error 1305
 ROLLBACK TO SAVEPOINT s4;
 
+#
+# Bug#39793 Foreign keys not constructed when column has a '#' in a comment or default value
+#
+
+#This statement should be written on a single line for proper testing
+CREATE TABLE t1 (f1 INTEGER PRIMARY KEY COMMENT 'My ID#', f2 INTEGER DEFAULT NULL, f3 CHAR(10) DEFAULT 'My ID#', CONSTRAINT f2_ref FOREIGN KEY (f2) REFERENCES t1 (f1)) ENGINE=INNODB;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+
 --echo End of 5.0 tests