Add LATERAL query support

mysql/lateral.go

@@ -0,0 +1,23 @@
+package mysql
+
+import "github.com/go-jet/jet/v2/internal/jet"
+
+func LATERAL(selectStmt SelectStatement) lateralImpl {
+	return lateralImpl{
+		selectStmt: selectStmt,
+	}
+}
+
+type lateralImpl struct {
+	selectStmt SelectStatement
+}
+
+func (l lateralImpl) AS(alias string) SelectTable {
+	subQuery := &selectTableImpl{
+		SelectTable: jet.NewLateral(l.selectStmt, alias),
+	}
+
+	subQuery.readableTableInterfaceImpl.parent = subQuery
+
+	return subQuery
+}