Support INSERT IGNORE in MySql and GenericDialect (#1004)

Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>

tests/sqlparser_mysql.rs

@@ -972,6 +972,47 @@ fn parse_simple_insert() {
     }
 }
 
+#[test]
+fn parse_ignore_insert() {
+    let sql = r"INSERT IGNORE INTO tasks (title, priority) VALUES ('Test Some Inserts', 1)";
+
+    match mysql_and_generic().verified_stmt(sql) {
+        Statement::Insert {
+            table_name,
+            columns,
+            source,
+            on,
+            ignore,
+            ..
+        } => {
+            assert_eq!(ObjectName(vec![Ident::new("tasks")]), table_name);
+            assert_eq!(vec![Ident::new("title"), Ident::new("priority")], columns);
+            assert!(on.is_none());
+            assert!(ignore);
+            assert_eq!(
+                Box::new(Query {
+                    with: None,
+                    body: Box::new(SetExpr::Values(Values {
+                        explicit_row: false,
+                        rows: vec![vec![
+                            Expr::Value(Value::SingleQuotedString("Test Some Inserts".to_string())),
+                            Expr::Value(number("1"))
+                        ]]
+                    })),
+                    order_by: vec![],
+                    limit: None,
+                    limit_by: vec![],
+                    offset: None,
+                    fetch: None,
+                    locks: vec![]
+                }),
+                source
+            );
+        }
+        _ => unreachable!(),
+    }
+}
+
 #[test]
 fn parse_empty_row_insert() {
     let sql = "INSERT INTO tb () VALUES (), ()";