From 9157ff5616f4e95df96ce32b32de2a998c53ae40 Mon Sep 17 00:00:00 2001
From: Yoav Cohen <yoav@satoricyber.com>
Date: Mon, 29 Dec 2025 18:16:36 +0100
Subject: [PATCH] MySQL: Add support for && as boolean AND

---
 src/dialect/mod.rs        | 5 +++++
 src/dialect/mysql.rs      | 5 +++++
 src/parser/mod.rs         | 3 +++
 tests/sqlparser_common.rs | 6 ++++++
 4 files changed, 19 insertions(+)

diff --git a/src/dialect/mod.rs b/src/dialect/mod.rs
index 1a416e4df..9a2adf20d 100644
--- a/src/dialect/mod.rs
+++ b/src/dialect/mod.rs
@@ -1216,6 +1216,11 @@ 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_overlap_as_and_operator(&self) -> bool {
+        false
+    }
 }
 
 /// This represents the operators for which precedence must be defined
diff --git a/src/dialect/mysql.rs b/src/dialect/mysql.rs
index 8d2a5ad4b..532e13d70 100644
--- a/src/dialect/mysql.rs
+++ b/src/dialect/mysql.rs
@@ -167,6 +167,11 @@ 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_overlap_as_and_operator(&self) -> bool {
+        true
+    }
 }
 
 /// `LOCK TABLES`
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index d1c4fe05b..e9bbc84d9 100644
--- a/src/parser/mod.rs
+++ b/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_overlap_as_and_operator() => {
+                Some(BinaryOperator::And)
+            }
             Token::CaretAt if dialect_is!(dialect is PostgreSqlDialect | GenericDialect) => {
                 Some(BinaryOperator::PGStartsWith)
             }
diff --git a/tests/sqlparser_common.rs b/tests/sqlparser_common.rs
index 9f549e4d0..929e58f83 100644
--- a/tests/sqlparser_common.rs
+++ b/tests/sqlparser_common.rs
@@ -17972,3 +17972,9 @@ 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_overlap_as_and_operator());
+    dialects.one_statement_parses_to("SELECT x && y", "SELECT x AND y");
+}