anchor.diff:  a|_n/a_
   
   |`BLOB`
  -|`STRING`
  +|`BYTES`
   a|_n/a_
   
   |`TEXT`
  
positive.code: a|_n/a_
  
  |`LONGBLOB`
  |`STRING`
  a|_n/a_
  
  |`LONGTEXT`
  
negative.code: |`FLOAT64`
  a|_n/a_
  
  |`CHAR[(M)]`
  |`STRING`
  a|_n/a_
  
  |`VARCHAR[(M)]`
  |`STRING`
  a|_n/a_
  
  |`BINARY[(M)]`
  |`BYTES`
  a|_n/a_
  
  |`VARBINARY[(M)]`
  |`BYTES`
  a|_n/a_
  
  |`TINYBLOB`
  |`BYTES`
  a|_n/a_
  
  |`TINYTEXT`
  