批处理后，要验证批处理对字段的更改是否更改成功，
查询字段命令如下：
SELECT column_name,DATA_TYPE,CHARACTER_MAXIMUM_LENGTH
FROM information_schema.columns
WHERE table_name='你要查询的表名'
AND column_name='你要查询的字段名'
查询dfs_gantry_travelimage和dfs_gantry_transaction的表更新字段数量是否符合预期
SELECT TABLE_NAME,count(1)
FROM information_schema.COLUMNS
WHERE
TABLE_SCHEMA='etcmj' and TABLE_NAME='dfs_gantry_travelimage'
union all
select TABLE_NAME,count(1)
from information_schema.COLUMNS
where TABLE_SCHEMA='etcmj' and TABLE_NAME='dfs_gantry_transaction';
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