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This permits only `ANALYZE <table_name>` to work, and all other forms fail with a parse error (as documented in the tests). On SQLite, ANALYZE generates: sqlite> CREATE TABLE sqlite_stat1(tbl,idx,stat); sqlite> CREATE TABLE iiftest(a int, b int, c int); sqlite> EXPLAIN ANALYZE iiftest; addr opcode p1 p2 p3 p4 p5 comment ---- ------------- ---- ---- ---- ------------- -- ------------- 0 Init 0 21 0 0 Start at 21 1 Null 0 1 0 0 r[1]=NULL 2 OpenWrite 3 4 0 3 0 root=4 iDb=0; sqlite_stat1 3 Rewind 3 9 0 0 4 Column 3 0 2 0 r[2]= cursor 3 column 0 5 Ne 3 8 2 BINARY-8 81 if r[2]!=r[3] goto 8 6 Rowid 3 4 0 0 r[4]=sqlite_stat1.rowid 7 Delete 3 0 0 sqlite_stat1 2 8 Next 3 4 0 1 9 OpenWrite 0 4 0 3 0 root=4 iDb=0; sqlite_stat1 10 OpenRead 4 2 0 3 0 root=2 iDb=0; iiftest 11 String8 0 11 0 iiftest 0 r[11]='iiftest'; iiftest 12 Count 4 13 0 0 r[13]=count() 13 IfNot 13 18 0 0 14 Null 0 12 0 0 r[12]=NULL 15 MakeRecord 11 3 9 BBB 0 r[9]=mkrec(r[11..13]) 16 NewRowid 0 5 0 0 r[5]=rowid 17 Insert 0 9 5 8 intkey=r[5] data=r[9] 18 LoadAnalysis 0 0 0 0 19 Expire 0 0 0 0 20 Halt 0 0 0 0 21 Transaction 0 1 9 0 1 usesStmtJournal=0 22 String8 0 3 0 iiftest 0 r[3]='iiftest' 23 Goto 0 1 0 0 Turso can now generate: turso> create table sqlite_stat1(tbl,idx,stat); turso> create table iiftest(a int, b int, c int); turso> explain analyze iiftest; addr opcode p1 p2 p3 p4 p5 comment ---- ----------------- ---- ---- ---- ------------- -- ------- 0 Init 0 19 0 0 Start at 19 1 Null 0 1 0 0 r[1]=NULL 2 OpenWrite 0 2 0 0 root=2; iDb=0 3 Rewind 0 9 0 0 Rewind sqlite_stat1 4 Column 0 0 2 0 r[2]=sqlite_stat1.tbl 5 Ne 2 3 9 0 if r[2]!=r[3] goto 9 6 RowId 0 4 0 0 r[4]=sqlite_stat1.rowid 7 Delete 0 0 0 sqlite_stat1 0 8 Next 0 4 0 0 9 OpenWrite 1 2 0 0 root=2; iDb=0 10 OpenRead 2 3 0 0 =iiftest, root=3, iDb=0 11 String8 0 7 0 iiftest 0 r[7]='iiftest' 12 Count 2 9 0 0 13 IfNot 9 18 0 0 if !r[9] goto 18 14 Null 0 8 0 0 r[8]=NULL 15 MakeRecord 7 3 6 0 r[6]=mkrec(r[7..9]) 16 NewRowid 1 5 0 0 r[5]=rowid 17 Insert 1 6 5 sqlite_stat1 0 intkey=r[5] data=r[6] 18 Halt 0 0 0 0 19 String8 0 3 0 iiftest 0 r[3]='iiftest' 20 Goto 0 1 0 0 Note the missing support for LoadAnalysis and Expire, but there's no optimizer work done yet to leverage any gathered statistics yet anyway. |
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| .. | ||
| benches | ||
| ext | ||
| functions | ||
| incremental | ||
| io | ||
| json | ||
| mvcc | ||
| numeric | ||
| storage | ||
| time | ||
| translate | ||
| vdbe | ||
| vector | ||
| assert.rs | ||
| build.rs | ||
| Cargo.toml | ||
| error.rs | ||
| fast_lock.rs | ||
| function.rs | ||
| info.rs | ||
| lib.rs | ||
| parameters.rs | ||
| pragma.rs | ||
| pseudo.rs | ||
| result.rs | ||
| schema.rs | ||
| series.rs | ||
| state_machine.rs | ||
| types.rs | ||
| util.rs | ||
| uuid.rs | ||
| vtab.rs | ||
| vtab_view.rs | ||