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issue_comments: 898760020

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html_url issue_url id node_id user created_at updated_at author_association body reactions issue performed_via_github_app
https://github.com/simonw/datasette/issues/1293#issuecomment-898760020 https://api.github.com/repos/simonw/datasette/issues/1293 898760020 IC_kwDOBm6k_c41kf1U 9599 2021-08-13T23:00:28Z 2021-08-13T23:01:27Z OWNER

New theory: this is all about SorterOpen and SorterInsert. Consider the following with extra annotations at the end of the lines after the --: ``` addr opcode p1 p2 p3 p4 p5 comment


0 Init 0 25 0 00 Start at 25
1 SorterOpen 2 5 0 k(1,B) 00 -- New SORTER in r2 with 5 slots 2 OpenRead 0 43 0 7 00 root=43 iDb=0; facetable 3 OpenRead 1 42 0 2 00 root=42 iDb=0; facet_cities 4 Rewind 0 16 0 00
5 Column 0 6 3 00 r[3]=facetable.neighborhood 6 Function0 1 2 1 like(2) 02 r[1]=func(r[2..3]) 7 IfNot 1 15 1 00
8 Column 0 5 4 00 r[4]=facetable.city_id 9 SeekRowid 1 15 4 00 intkey=r[4]
10 Column 1 1 6 00 r[6]=facet_cities.name 11 Column 0 4 7 00 r[7]=facetable.state 12 Column 0 6 5 00 r[5]=facetable.neighborhood 13 MakeRecord 5 3 9 00 r[9]=mkrec(r[5..7]) 14 SorterInsert 2 9 5 3 00 key=r[9]-- WRITES record from r9 (line above) into sorter in r2 15 Next 0 5 0 01
16 OpenPseudo 3 10 5 00 5 columns in r[10] 17 SorterSort 2 24 0 00 -- runs the sort, not relevant to my goal 18 SorterData 2 10 3 00 r[10]=data -- "Write into register P2 (r10) the current sorter data for sorter cursor P1 (sorter 2)" 19 Column 3 2 8 00 r[8]=state
20 Column 3 1 7 00 r[7]=facet_cities.name 21 Column 3 0 6 00 r[6]=neighborhood 22 ResultRow 6 3 0 00 output=r[6..8] 23 SorterNext 2 18 0 00
24 Halt 0 0 0 00
25 Transaction 0 0 35 0 01 usesStmtJournal=0 26 String8 0 2 0 %bob% 00 r[2]='%bob%' 27 Goto 0 1 0 00
```

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