comdb2/sqlite plan (commit: dd2553d)

gistfile1.txt

nctdb> update sbtest1 set k=k+1 where id=1;
+-------------------------------------------------------------------------------------------------------------------------------+
| Plan                                                                                                                          |
+-------------------------------------------------------------------------------------------------------------------------------+
| '  0 [       Init]: Start at 23  '                                                                                            |
| '  1 [       Null]: R1 = NULL'                                                                                                |
| '  2 [   OpenRead]: Open read cursor [2] on index "COMDB2_PK" of table "sbtest1" (covering index) (cmnt:$COMDB2_PK_7C917175)' |
| '  3 [ColumnsUsed]: Cursor [2] using column mask 1000000000000000000000000000000000000000000000000000000000000000'            |
| '  4 [    Explain]: No-op (178)'                                                                                              |
| '  5 [    Integer]: R7 = 1'                                                                                                   |
| '  6 [     SeekGE]: Move cursor [2] to smallest entry >= R7. If no such records exist, go to 11'                              |
| '  7 [      IdxGT]:     Jump to 11 if cursor [2] > R7'                                                                        |
| '  8 [   IdxRowid]:     R2 = Rowid of current entry at cursor [2]'                                                            |
| '  9 [  RowSetAdd]:     Insert R2 into boolean index in R1'                                                                   |
| ' 10 [       Next]: Move cursor [2] to next entry. If entry exists, go to 7'                                                  |
| ' 11 [  OpenWrite]: Open write cursor [0] on table "sbtest1"  (cmnt:sbtest1)'                                                 |
| ' 12 [ RowSetRead]: R2 = Smallest from boolean index in R1. Jump to 22 if empty'                                              |
| ' 13 [  NotExists]:     If record id in R2 can''t be found using cursor [0], go to 12'                                        |
| ' 14 [     Column]:     R3 = "id" from cursor [0] on table "sbtest1"  (cmnt:sbtest1.id)'                                      |
| ' 15 [     Column]:     R8 = "k" from cursor [0] on table "sbtest1"  (cmnt:sbtest1.k)'                                        |
| ' 16 [        Add]:     R4 = R8 + R9'                                                                                         |
| ' 17 [     Column]:     R5 = "c" from cursor [0] on table "sbtest1"  (cmnt:sbtest1.c)'                                        |
| ' 18 [     Column]:     R6 = "pad" from cursor [0] on table "sbtest1"  (cmnt:sbtest1.pad)'                                    |
| ' 19 [ MakeRecord]:     R8 = R3..R6'                                                                                          |
| ' 20 [     Insert]:     Write record in R8 into table "sbtest1"  using cursor [0]'                                            |
| ' 21 [       Goto]: Go to 12'                                                                                                 |
| ' 22 [       Halt]: Stop'                                                                                                     |
| ' 23 [Transaction]: Start a write transaction (cmnt:usesStmtJournal=0)'                                                       |
| ' 24 [    Integer]: R9 = 1'                                                                                                   |
| ' 25 [       Goto]: Go to 1'                                                                                                  |
+-------------------------------------------------------------------------------------------------------------------------------+
[update sbtest1 set k=k+1 where id=1] rc 0