chat table columns
| Column | Type | Size | Nulls | Auto | Default | Children | Parents | Comments | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| id | BIGINT | 19 | √ | null | 
				  
  | 
				 
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| course | BIGINT | 19 | 0 | 
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| name | VARCHAR | 255 | 
				   | 
				 
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| intro | LONGTEXT | 2147483647 | null | 
				   | 
				 
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| introformat | SMALLINT | 5 | 0 | 
				   | 
				 
				   | 
				 text format of intro field  | 
				||||||||
| keepdays | BIGINT | 19 | 0 | 
				   | 
				 
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				 |||||||||
| studentlogs | SMALLINT | 5 | 0 | 
				   | 
				 
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| chattime | BIGINT | 19 | 0 | 
				   | 
				 
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| schedule | SMALLINT | 5 | 0 | 
				   | 
				 
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| timemodified | BIGINT | 19 | 0 | 
				   | 
				 
				   | 
				 
Table contained -1 rows
chat table indexes
| Constraint Name | Type | Sort | Column(s) | 
|---|---|---|---|
| PRIMARY | Primary key | Asc | id | 
| chat_cou_ix | Performance | Asc | course | 
