错误信息：
[2025/07/01 10:13:01.265 +08:00] [ERROR] [distsql.go:1567] [“table reader fetch next chunk failed”] [conn=2613480208] [session_alias=] [error=“context canceled”]
[2025/07/01 10:13:01.265 +08:00] [ERROR] [distsql.go:1567] [“table reader fetch next chunk failed”] [conn=2613480208] [session_alias=] [error=“context canceled”]
[2025/07/01 10:13:01.265 +08:00] [ERROR] [distsql.go:1567] [“table reader fetch next chunk failed”] [conn=2613480208] [session_alias=] [error=“context canceled”]
这个错误场景可以重演
表结构信息：
CREATE TABLE organ_fea_source (
id bigint NOT NULL AUTO_INCREMENT COMMENT ‘主键’,
organ_mapping_id bigint NOT NULL COMMENT ‘机构映射关系id’,
key_id varchar(100) COLLATE utf8mb4_general_ci NOT NULL COMMENT ‘文献keyid’,
title_organ text COLLATE utf8mb4_general_ci NOT NULL COMMENT ‘文献中的organ’,
source varchar(50) COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘来源’,
fea text COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘暂存的别名’,
limit_item text COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘限定项’,
exclude_item text COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘排除项’,
standard_id bigint DEFAULT NULL COMMENT ‘别名添加到的虚拟机构id’,
manual_id bigint DEFAULT NULL COMMENT ‘别名添加到的真实机构id’,
status tinyint NOT NULL DEFAULT ‘1’ COMMENT ‘数据状态，1-待处理，2-手动隐藏，3-已匹配，4-已添加’,
create_time datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT ‘创建时间’,
create_by varchar(100) COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘创建人（系统创建为null）’,
modify_time datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT ‘修改时间’,
modify_by varchar(100) COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT ‘修改人’,
update_time datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT ‘最后修改时间’,
PRIMARY KEY (id) /*T![clustered_index] CLUSTERED */,
KEY key_id_idx (key_id),
KEY modify_time_idx (modify_time),
KEY title_organ_idx (title_organ(20)),
KEY idx_mapping_id (organ_mapping_id,status)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci AUTO_INCREMENT=278358722 COMMENT=‘机构别名提取表’;
执行SQL：SELECT id,organ_mapping_id,key_id,title_organ,source,fea,limit_item,exclude_item,standard_id,manual_id,status,create_time,create_by,modify_time,modify_by FROM organ_fea_source
WHERE (organ_mapping_id IN (80,6646) AND status IN (1) AND title_organ LIKE ‘CNR%’) LIMIT 20,20
必定会出现错误日志，但是不影响结果，查看SQL 执行步骤是走的idx_mapping_id索引。
换成任何条件都是会出现错误日志
如果执行以下SQL不会报错:
SELECT id,organ_mapping_id,key_id,title_organ,source,fea,limit_item,exclude_item,standard_id,manual_id,status,create_time,create_by,modify_time,modify_by FROM organ_fea_source
WHERE (organ_mapping_id IN (80,6646) AND status IN (1) AND title_organ LIKE ‘CNR’) LIMIT 20,20
SELECT id,organ_mapping_id,key_id,title_organ,source,fea,limit_item,exclude_item,standard_id,manual_id,status,create_time,create_by,modify_time,modify_by FROM organ_fea_source
WHERE (organ_mapping_id IN (80,6646) AND status IN (1) AND title_organ = ‘CNR’) LIMIT 20,20
同时我还用以下SQL检查，都没有发现异常：
ANALYZE TABLE organ_fea_source;
ADMIN CHECK TABLE organ_fea_source;
把索引删除后重建 也不能解决这个错误
表的数据量有1.6亿条，存储大小40GB。