index-constraints vars=(id INT, book_id INT, book2_id INT, citation_id INT) index=(id)
  id = 0
  AND book2_id = 0
  OR id = 1 AND book2_id = 1
  OR id = 3 AND book2_id = 4
  OR id = 3 AND book2_id = 9
  OR id = 5 AND book2_id = 16
  OR id = 5 AND book2_id = 25
  OR id = 6 AND book2_id = 36
  OR id = 7 AND book2_id = 49
  OR id = 8 AND book2_id = 64
  OR id = 9 AND book2_id = 81
  OR id = 10 AND book2_id = 100
  OR id = 11 AND book2_id = 121
  OR id = 12 AND book2_id = 144
  OR id = 13 AND book2_id = 169
  OR id = 14 AND book2_id = 196
  OR id = 15 AND book2_id = 225
  OR id = 16 AND book2_id = 256
  OR id = 17 AND book2_id = 289
  OR id = 18 AND book2_id = 324
  OR id = 19 AND book2_id = 361
  OR id = 20 AND book2_id = 400
----
[/0 - /1]
[/3 - /3]
[/5 - /20]
Remaining filter: (((((((((((((((((((((id = 0) AND (book2_id = 0)) OR ((id = 1) AND (book2_id = 1))) OR ((id = 3) AND (book2_id = 4))) OR ((id = 3) AND (book2_id = 9))) OR ((id = 5) AND (book2_id = 16))) OR ((id = 5) AND (book2_id = 25))) OR ((id = 6) AND (book2_id = 36))) OR ((id = 7) AND (book2_id = 49))) OR ((id = 8) AND (book2_id = 64))) OR ((id = 9) AND (book2_id = 81))) OR ((id = 10) AND (book2_id = 100))) OR ((id = 11) AND (book2_id = 121))) OR ((id = 12) AND (book2_id = 144))) OR ((id = 13) AND (book2_id = 169))) OR ((id = 14) AND (book2_id = 196))) OR ((id = 15) AND (book2_id = 225))) OR ((id = 16) AND (book2_id = 256))) OR ((id = 17) AND (book2_id = 289))) OR ((id = 18) AND (book2_id = 324))) OR ((id = 19) AND (book2_id = 361))) OR ((id = 20) AND (book2_id = 400))

index-constraints vars=(id INT, book_id INT, book2_id INT, citation_id INT) index=(id,book2_id)
  id = 0
  AND book2_id = 0
  OR id = 1 AND book2_id = 1
  OR id = 3 AND book2_id = 4
  OR id = 3 AND book2_id = 9
  OR id = 5 AND book2_id = 16
  OR id = 5 AND book2_id = 25
  OR id = 6 AND book2_id = 36
  OR id = 7 AND book2_id = 49
  OR id = 8 AND book2_id = 64
  OR id = 9 AND book2_id = 81
  OR id = 10 AND book2_id = 100
  OR id = 11 AND book2_id = 121
  OR id = 12 AND book2_id = 144
  OR id = 13 AND book2_id = 169
  OR id = 14 AND book2_id = 196
  OR id = 15 AND book2_id = 225
  OR id = 16 AND book2_id = 256
  OR id = 17 AND book2_id = 289
  OR id = 18 AND book2_id = 324
  OR id = 19 AND book2_id = 361
  OR id = 20 AND book2_id = 400
----
[/0/0 - /0/0]
[/1/1 - /1/1]
[/3/4 - /3/4]
[/3/9 - /3/9]
[/5/16 - /5/16]
[/5/25 - /5/25]
[/6/36 - /6/36]
[/7/49 - /7/49]
[/8/64 - /8/64]
[/9/81 - /9/81]
[/10/100 - /10/100]
[/11/121 - /11/121]
[/12/144 - /12/144]
[/13/169 - /13/169]
[/14/196 - /14/196]
[/15/225 - /15/225]
[/16/256 - /16/256]
[/17/289 - /17/289]
[/18/324 - /18/324]
[/19/361 - /19/361]
[/20/400 - /20/400]
