二次进化

mybatis-plus-extension/src/main/java/com/baomidou/mybatisplus/extension/plugins/PaginationInterceptor.java

@@ -180,7 +180,7 @@ public class PaginationInterceptor extends AbstractSqlParserHandler implements I
 
         LongSupplier supplier = page.getSupplier();
         boolean orderBy = true;
-        if (page.getTotal() < 0) {
+        if (page.getTotal() == 0) {
             // total 为0 才进行 count
             SqlInfo sqlInfo = SqlParserUtils.getOptimizeCountSql(page.optimizeCountSql(), sqlParser, originalSql);
             orderBy = sqlInfo.isOrderBy();

mybatis-plus-extension/src/main/java/com/baomidou/mybatisplus/extension/plugins/pagination/Page.java

@@ -39,9 +39,9 @@ public class Page<T> implements IPage<T> {
      */
     private List<T> records = Collections.emptyList();
     /**
-     * 总数，当 total 大于等于 0 时分页插件不会进行 count 查询
+     * 总数，当 total 不为 0 时分页插件不会进行 count 查询
      */
-    private long total = -1;
+    private long total = 0;
     /**
      * 每页显示条数，默认 10
      */
@@ -96,7 +96,12 @@ public class Page<T> implements IPage<T> {
             this.current = current;
         }
         this.size = size;
-        this.total = total;
+        if (0 == total) {
+            // 通过构造函数自定义 count sql 的值为 0 设置 -1 不查询分页总数
+            this.total = -1;
+        } else {
+            this.total = total;
+        }
     }
 
     /**