add RawValue

mybatis-flex-core/src/main/java/com/mybatisflex/core/query/QueryCondition.java

@@ -151,6 +151,10 @@ public class QueryCondition implements Serializable {
             else if (value instanceof QueryWrapper) {
                 sql.append("(").append(dialect.buildSelectSql((QueryWrapper) value)).append(")");
             }
+            //原生sql
+            else if (value instanceof RawValue){
+                sql.append(((RawValue) value).getContext());
+            }
             //正常查询，构建问号
             else {
                 appendQuestionMark(sql);
@@ -180,7 +184,8 @@ public class QueryCondition implements Serializable {
         if (LOGIC_IS_NULL.equals(logic)
                 || LOGIC_IS_NOT_NULL.equals(logic)
                 || value instanceof QueryColumn
-                || value instanceof QueryWrapper) {
+                || value instanceof QueryWrapper
+                || value instanceof RawValue) {
             //do nothing
         }
 

mybatis-flex-core/src/main/java/com/mybatisflex/core/query/QueryMethods.java

@@ -95,4 +95,8 @@ public class QueryMethods {
         return select(new StringQueryColumn("1"));
     }
 
+    public static RawValue raw(String raw){
+        return new RawValue(raw);
+    }
+
 }

mybatis-flex-core/src/main/java/com/mybatisflex/core/query/RawValue.java

@@ -0,0 +1,28 @@
+package com.mybatisflex.core.query;
+
+import java.io.Serializable;
+
+public class RawValue implements Serializable {
+
+    private String context;
+
+    public RawValue() {
+    }
+
+    public RawValue(String context) {
+        this.context = context;
+    }
+
+    public String getContext() {
+        return context;
+    }
+
+    public void setContext(String context) {
+        this.context = context;
+    }
+
+    @Override
+    public String toString() {
+        return context;
+    }
+}

mybatis-flex-core/src/test/java/com/mybatisflex/coretest/AccountSqlTester.java

@@ -226,6 +226,38 @@ public class AccountSqlTester {
         System.out.println(sql);
     }
 
+    @Test
+    public void testJoin2Sql() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .select()
+                .from(ACCOUNT)
+                .leftJoin(ARTICLE).on(
+                        ACCOUNT.ID.eq(ARTICLE.ACCOUNT_ID).and(ACCOUNT.AGE.eq(18))
+                )
+                .where(ACCOUNT.AGE.ge(10));
+
+        IDialect dialect = new CommonsDialectImpl();
+        String sql = dialect.forSelectListByQuery(queryWrapper);
+        System.out.println(sql);
+    }
+
+    @Test
+    public void testJoin3Sql() {
+        QueryWrapper queryWrapper = QueryWrapper.create()
+                .select()
+                .from(ACCOUNT)
+                .leftJoin(
+                        select().from(ARTICLE).where(ARTICLE.ID.ge(100))
+                ).as("a").on(
+                        ACCOUNT.ID.eq(raw("a.id"))
+                )
+                .where(ACCOUNT.AGE.ge(10));
+
+        IDialect dialect = new CommonsDialectImpl();
+        String sql = dialect.forSelectListByQuery(queryWrapper);
+        System.out.println(sql);
+    }
+
     @Test
     public void testOrderBySql() {
         QueryWrapper queryWrapper = QueryWrapper.create()