MySQL: Add support for && as boolean AND (#2144)

Author: yoavcloud

src/dialect/mod.rs

@@ -1221,6 +1221,11 @@ pub trait Dialect: Debug + Any {
     fn supports_quote_delimited_string(&self) -> bool {
         false
     }
+
+    /// Returns true if the dialect considers the `&&` operator as a boolean AND operator.
+    fn supports_double_ampersand_operator(&self) -> bool {
+        false
+    }
 }
 
 /// This represents the operators for which precedence must be defined

src/dialect/mysql.rs

@@ -171,6 +171,11 @@ impl Dialect for MySqlDialect {
     fn supports_cross_join_constraint(&self) -> bool {
         true
     }
+
+    /// See: <https://dev.mysql.com/doc/refman/8.4/en/expressions.html>
+    fn supports_double_ampersand_operator(&self) -> bool {
+        true
+    }
 }
 
 /// `LOCK TABLES`

src/parser/mod.rs

@@ -3500,6 +3500,9 @@ impl<'a> Parser<'a> {
             Token::Overlap if dialect_is!(dialect is PostgreSqlDialect | GenericDialect) => {
                 Some(BinaryOperator::PGOverlap)
             }
+            Token::Overlap if dialect.supports_double_ampersand_operator() => {
+                Some(BinaryOperator::And)
+            }
             Token::CaretAt if dialect_is!(dialect is PostgreSqlDialect | GenericDialect) => {
                 Some(BinaryOperator::PGStartsWith)
             }

tests/sqlparser_common.rs

@@ -18037,3 +18037,9 @@ fn parse_select_parenthesized_wildcard() {
     assert_eq!(select2.projection.len(), 1);
     assert!(matches!(select2.projection[0], SelectItem::Wildcard(_)));
 }
+
+#[test]
+fn parse_overlap_as_bool_and() {
+    let dialects = all_dialects_where(|d| d.supports_double_ampersand_operator());
+    dialects.one_statement_parses_to("SELECT x && y", "SELECT x AND y");
+}