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4619890ffc
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.
64 lines
1.8 KiB
Tcl
Executable File
64 lines
1.8 KiB
Tcl
Executable File
#!/usr/bin/env tclsh
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Things that do work:
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do_execsql_test_on_specific_db {:memory:} empty-table {
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CREATE TABLE sqlite_stat1(tbl,idx,stat);
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CREATE TABLE temp (a integer);
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ANALYZE temp;
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SELECT * FROM sqlite_stat1;
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} {}
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do_execsql_test_on_specific_db {:memory:} one-row-table {
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CREATE TABLE sqlite_stat1(tbl,idx,stat);
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CREATE TABLE temp (a integer);
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INSERT INTO temp VALUES (1);
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ANALYZE temp;
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SELECT * FROM sqlite_stat1;
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} {temp||1}
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do_execsql_test_on_specific_db {:memory:} analyze-deletes {
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CREATE TABLE sqlite_stat1(tbl,idx,stat);
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INSERT INTO sqlite_stat1 VALUES ('temp', NULL, 10);
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CREATE TABLE temp (a integer);
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INSERT INTO temp VALUES (1);
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ANALYZE temp;
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SELECT * FROM sqlite_stat1;
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} {temp||1}
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# Things that don't work:
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do_execsql_test_in_memory_error analyze-all-databases-fails {
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ANALYZE;
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} {.*ANALYZE.*not supported.*}
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do_execsql_test_in_memory_error analyze-one-database-fails {
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ANALYZE main;
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} {.*ANALYZE.*not supported.*}
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do_execsql_test_in_memory_error analyze-without-stat-table-fails {
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CREATE TABLE temp (a integer);
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ANALYZE temp;
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} {.*ANALYZE.*not supported.*}
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do_execsql_test_in_memory_error analyze-table-with-pk-fails {
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CREATE TABLE sqlite_stat1(tbl,idx,stat);
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CREATE TABLE temp (a integer primary key);
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ANALYZE temp;
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} {.*ANALYZE.*not supported.*}
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do_execsql_test_in_memory_error analyze-table-without-rowid-fails {
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CREATE TABLE sqlite_stat1(tbl,idx,stat);
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CREATE TABLE temp (a integer primary key) WITHOUT ROWID;
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ANALYZE temp;
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} {.*ANALYZE.*not supported.*}
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do_execsql_test_in_memory_error analyze-index-fails {
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CREATE TABLE sqlite_stat1(tbl,idx,stat);
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CREATE TABLE temp (a integer, b integer);
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CREATE INDEX temp_b ON temp (b);
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ANALYZE temp_b;
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} {.*ANALYZE.*not supported.*}
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