46 lines
1.2 KiB
MySQL
46 lines
1.2 KiB
MySQL
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-- 检查xq_client_log表的所有字段长度
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-- 找出导致Data truncation的真正原因
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-- 1. 检查所有字段的长度限制
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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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IS_NULLABLE,
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COLUMN_DEFAULT
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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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ORDER BY ORDINAL_POSITION;
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-- 2. 检查iot_device_data表中的实际数据长度
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SELECT
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device_id,
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device_type,
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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(latitude AS CHAR)) as lat_length,
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LENGTH(CAST(longitude AS CHAR)) as lng_length,
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LENGTH(CAST(steps AS CHAR)) as steps_length,
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voltage,
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temperature,
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latitude,
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longitude,
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steps
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FROM iot_device_data
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WHERE device_type = 4
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ORDER BY update_time DESC
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LIMIT 10;
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-- 3. 检查是否有其他可能超长的字段
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SELECT
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COLUMN_NAME,
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CHARACTER_MAXIMUM_LENGTH
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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 CHARACTER_MAXIMUM_LENGTH IS NOT NULL
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AND CHARACTER_MAXIMUM_LENGTH < 1000;
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