Parse byte/bit string literals in MySQL and Postgres (#1532)

src/tokenizer.rs

@@ -704,8 +704,9 @@ impl<'a> Tokenizer<'a> {
                     }
                     Ok(Some(Token::Whitespace(Whitespace::Newline)))
                 }
-                // BigQuery uses b or B for byte string literal
-                b @ 'B' | b @ 'b' if dialect_of!(self is BigQueryDialect | GenericDialect) => {
+                // BigQuery and MySQL use b or B for byte string literal, Postgres for bit strings
+                b @ 'B' | b @ 'b' if dialect_of!(self is BigQueryDialect | PostgreSqlDialect | MySqlDialect | GenericDialect) =>
+                {
                     chars.next(); // consume
                     match chars.peek() {
                         Some('\'') => {

tests/sqlparser_mysql.rs

@@ -2960,3 +2960,14 @@ fn parse_logical_xor() {
         select.projection[3]
     );
 }
+
+#[test]
+fn parse_bitstring_literal() {
+    let select = mysql_and_generic().verified_only_select("SELECT B'111'");
+    assert_eq!(
+        select.projection,
+        vec![SelectItem::UnnamedExpr(Expr::Value(
+            Value::SingleQuotedByteStringLiteral("111".to_string())
+        ))]
+    );
+}

tests/sqlparser_postgres.rs

@@ -5098,3 +5098,14 @@ fn parse_create_type_as_enum() {
         _ => unreachable!(),
     }
 }
+
+#[test]
+fn parse_bitstring_literal() {
+    let select = pg_and_generic().verified_only_select("SELECT B'111'");
+    assert_eq!(
+        select.projection,
+        vec![SelectItem::UnnamedExpr(Expr::Value(
+            Value::SingleQuotedByteStringLiteral("111".to_string())
+        ))]
+    );
+}