修改：1、arangodb -> mysql，去除arangodb

2、部分字段逻辑重构

src/main/java/net/tccn/meta/MLink.java

@@ -0,0 +1,31 @@
+package net.tccn.meta;
+
+import lombok.Getter;
+import lombok.Setter;
+import net.tccn.base.BaseEntity;
+import org.redkale.persistence.Column;
+import org.redkale.persistence.Entity;
+import org.redkale.persistence.Id;
+import org.redkale.persistence.Table;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Created by liangxianyou at 2018/12/25 16:22.
+ */
+@Getter
+@Setter
+@Entity
+@Table(name = "mlink", comment = "MLink表")
+public class MLink extends BaseEntity {
+    @Id
+    @Column(comment = "[主键ID]自增")
+    private int linkid; // 根据您的说明移除了nonnull，但通常主键不应该允许为空
+
+    @Column(comment = "[关联的表]存储表别名")
+    private String[] tables = new String[0];
+
+    @Column(comment = "[关联关系]")
+    private Map<String, String> links = new HashMap<>();
+}