73 lines
1.9 KiB
SQL
73 lines
1.9 KiB
SQL
-- 检查所有项圈设备的所有字段长度
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-- 找出真正导致Data truncation的字段
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-- 1. 检查所有字段的长度
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SELECT
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device_id,
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latitude,
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longitude,
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voltage,
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temperature,
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steps,
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same_day_steps,
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LENGTH(CAST(latitude AS CHAR)) as lat_length,
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LENGTH(CAST(longitude AS CHAR)) as lng_length,
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LENGTH(CAST(voltage AS CHAR)) as voltage_length,
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LENGTH(CAST(temperature AS CHAR)) as temp_length,
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LENGTH(CAST(steps AS CHAR)) as steps_length,
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LENGTH(CAST(same_day_steps AS CHAR)) as same_day_steps_length
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FROM iot_device_data
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WHERE device_type = 4
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ORDER BY LENGTH(CAST(latitude AS CHAR)) DESC
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LIMIT 10;
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-- 2. 检查是否有超长字段
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SELECT
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'latitude' as field_name,
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MAX(LENGTH(CAST(latitude AS CHAR))) as max_length
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FROM iot_device_data
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WHERE device_type = 4
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UNION ALL
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SELECT
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'longitude' as field_name,
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MAX(LENGTH(CAST(longitude AS CHAR))) as max_length
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FROM iot_device_data
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WHERE device_type = 4
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UNION ALL
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SELECT
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'voltage' as field_name,
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MAX(LENGTH(CAST(voltage AS CHAR))) as max_length
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FROM iot_device_data
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WHERE device_type = 4
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UNION ALL
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SELECT
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'temperature' as field_name,
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MAX(LENGTH(CAST(temperature AS CHAR))) as max_length
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FROM iot_device_data
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WHERE device_type = 4
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UNION ALL
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SELECT
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'steps' as field_name,
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MAX(LENGTH(CAST(steps AS CHAR))) as max_length
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FROM iot_device_data
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WHERE device_type = 4
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UNION ALL
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SELECT
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'same_day_steps' as field_name,
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MAX(LENGTH(CAST(same_day_steps AS CHAR))) as max_length
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FROM iot_device_data
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WHERE device_type = 4;
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-- 3. 检查xq_client_log表的字段长度限制
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SELECT
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COLUMN_NAME,
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DATA_TYPE,
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CHARACTER_MAXIMUM_LENGTH,
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NUMERIC_PRECISION,
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NUMERIC_SCALE
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FROM INFORMATION_SCHEMA.COLUMNS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'xq_client_log'
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AND COLUMN_NAME IN ('latitude', 'longitude', 'device_voltage', 'device_temp', 'walk_steps', 'y_walk_steps')
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ORDER BY ORDINAL_POSITION;
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