added the varray type mapping

Author: jawad-arb123

oracle/varray.go

@@ -0,0 +1,83 @@
+package oracle
+
+import (
+	"context"
+	"database/sql/driver"
+	"fmt"
+
+	"github.com/godror/godror"
+)
+
+var DB godror.Execer // set in tests
+
+// EmailList is a Go wrapper for Oracle VARRAY type EMAIL_LIST_ARR.
+type EmailList []string
+
+// Scan implements sql.Scanner (Oracle -> Go)
+func (e *EmailList) Scan(src interface{}) error {
+	obj, ok := src.(*godror.Object)
+	if !ok {
+		return fmt.Errorf("expected *godror.Object, got %T", src)
+	}
+	defer obj.Close()
+
+	coll := obj.Collection()
+	length, err := coll.Len()
+	if err != nil {
+		return fmt.Errorf("get collection length: %w", err)
+	}
+
+	var list []string
+	for i := 0; i < length; i++ {
+		var data godror.Data
+		if err := coll.GetItem(&data, i); err != nil {
+			return fmt.Errorf("GetItem %d: %w", i, err)
+		}
+		val := data.Get()
+		switch v := val.(type) {
+		case string:
+			list = append(list, v)
+		case []byte:
+			list = append(list, string(v))
+		default:
+			if v != nil {
+				list = append(list, fmt.Sprint(v))
+			}
+		}
+	}
+	*e = list
+	return nil
+}
+
+// Value implements driver.Valuer (Go -> Oracle)
+func (e EmailList) Value() (driver.Value, error) {
+	if e == nil {
+		return nil, nil
+	}
+	if DB == nil {
+		return nil, fmt.Errorf("oracle.DB not initialized")
+	}
+
+	ctx := context.Background()
+
+	objType, err := godror.GetObjectType(ctx, DB, "EMAIL_LIST_ARR")
+	if err != nil {
+		return nil, fmt.Errorf("get object type: %w", err)
+	}
+	defer objType.Close()
+
+	obj, err := objType.NewObject()
+	if err != nil {
+		return nil, fmt.Errorf("new object: %w", err)
+	}
+	coll := obj.Collection()
+
+	for _, s := range e {
+		if err := coll.Append(s); err != nil {
+			obj.Close()
+			return nil, fmt.Errorf("append: %w", err)
+		}
+	}
+
+	return obj, nil
+}