snapshot of https://github.com/sqlc-dev/sqlc.git (main, 2026-09-16; blobs > 131072B omitted)

internal/sql/ast/on_duplicate_key_update.go

@@ -0,0 +1,39 @@
+package ast
+
+import "github.com/sqlc-dev/sqlc/internal/sql/format"
+
+// OnDuplicateKeyUpdate represents MySQL's ON DUPLICATE KEY UPDATE clause
+type OnDuplicateKeyUpdate struct {
+	Tag NodeTag[OnDuplicateKeyUpdate] `json:"tag"`
+
+	// TargetList contains the assignments (column = value pairs)
+	TargetList *List `json:"target_list,omitempty"`
+	Location   int   `json:"location"`
+}
+
+func (n *OnDuplicateKeyUpdate) Pos() int {
+	return n.Location
+}
+
+func (n *OnDuplicateKeyUpdate) Format(buf *TrackedBuffer, d format.Dialect) {
+	if n == nil {
+		return
+	}
+	buf.WriteString("ON DUPLICATE KEY UPDATE ")
+	if n.TargetList != nil {
+		for i, item := range n.TargetList.Items {
+			if i > 0 {
+				buf.WriteString(", ")
+			}
+			if rt, ok := item.(*ResTarget); ok {
+				if rt.Name != nil {
+					buf.WriteString(*rt.Name)
+				}
+				buf.WriteString(" = ")
+				buf.astFormat(rt.Val, d)
+			} else {
+				buf.astFormat(item, d)
+			}
+		}
+	}
+}