Added unquoted identifiers unicode support for mySql, postgreSqp, also added a test for that

Author: etgarperets

src/dialect/mysql.rs

@@ -51,7 +51,7 @@ impl Dialect for MySqlDialect {
     }
 
     fn is_identifier_part(&self, ch: char) -> bool {
-        self.is_identifier_start(ch) || ch.is_ascii_digit()
+        self.is_identifier_start(ch) || ch.is_ascii_digit() || !ch.is_ascii()
     }
 
     fn is_delimited_identifier_start(&self, ch: char) -> bool {

src/dialect/postgresql.rs

@@ -72,7 +72,7 @@ impl Dialect for PostgreSqlDialect {
     }
 
     fn is_identifier_part(&self, ch: char) -> bool {
-        ch.is_alphabetic() || ch.is_ascii_digit() || ch == '$' || ch == '_'
+        ch.is_alphabetic() || ch.is_ascii_digit() || ch == '$' || ch == '_'  || !ch.is_ascii()
     }
 
     fn supports_unicode_string_literal(&self) -> bool {

src/dialect/redshift.rs

@@ -88,7 +88,7 @@ impl Dialect for RedshiftSqlDialect {
     fn is_identifier_part(&self, ch: char) -> bool {
         // Extends Postgres dialect with sharp and UTF-8 multibyte chars
         // https://docs.aws.amazon.com/redshift/latest/dg/r_names.html
-        PostgreSqlDialect {}.is_identifier_part(ch) || ch == '#' || !ch.is_ascii()
+        PostgreSqlDialect {}.is_identifier_part(ch) || ch == '#' 
     }
 
     /// redshift has `CONVERT(type, value)` instead of `CONVERT(value, type)`

tests/sqlparser_common.rs

@@ -15895,3 +15895,11 @@ fn parse_create_procedure_with_parameter_modes() {
         _ => unreachable!(),
     }
 }
+
+    #[test] 
+    fn test_unicode_support() {
+        let unicode_sql = r#"SELECT phoneǤЖשचᎯ⻩☯♜🦄⚛🀄ᚠ⌛🌀 tbl FROM customers"#;
+        let dialects_supporting_unicode = TestedDialects::new(vec![Box::new(MySqlDialect {}), Box::new(RedshiftSqlDialect {}), Box::new(PostgreSqlDialect {})]);
+        let _ = dialects_supporting_unicode.parse_sql_statements(unicode_sql).unwrap();
+    }
+