0d0614bdc6
used to issue a hint to the VFS to limit mmap space to N bytes. The VFS is free to ignore that hint if desired. However, if "PRAGMA mmap_limit(0)" is used, xFetch is never called. FossilOrigin-Name: 1b37c4effdd03aa2ea938a71b4f22ed27391689b
103 lines
2.3 KiB
Plaintext
103 lines
2.3 KiB
Plaintext
# 2011 September 20
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# Tests for the sqlite3_db_status() function
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set ::testprefix dbstatus2
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do_execsql_test 1.0 {
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PRAGMA page_size = 1024;
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PRAGMA auto_vacuum = 0;
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CREATE TABLE t1(a PRIMARY KEY, b);
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INSERT INTO t1 VALUES(1, randomblob(600));
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INSERT INTO t1 VALUES(2, randomblob(600));
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INSERT INTO t1 VALUES(3, randomblob(600));
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}
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proc db_hit_miss {db {reset 0}} {
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set nHit [sqlite3_db_status $db CACHE_HIT $reset]
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set nMiss [sqlite3_db_status $db CACHE_MISS $reset]
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list $nHit $nMiss
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}
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proc db_write {db {reset 0}} {
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sqlite3_db_status $db CACHE_WRITE $reset
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}
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do_test 1.1 {
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db close
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sqlite3 db test.db
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execsql { PRAGMA mmap_limit = 0 }
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expr {[file size test.db] / 1024}
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} 6
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do_test 1.2 {
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execsql { SELECT b FROM t1 WHERE a=2 }
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db_hit_miss db
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} {{0 2 0} {0 4 0}}
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do_test 1.3 {
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execsql { SELECT b FROM t1 WHERE a=2 }
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db_hit_miss db
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} {{0 6 0} {0 4 0}}
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do_test 1.4 {
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execsql { SELECT b FROM t1 WHERE a=2 }
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db_hit_miss db
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} {{0 10 0} {0 4 0}}
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do_test 1.5 {
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db_hit_miss db 1
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} {{0 10 0} {0 4 0}}
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do_test 1.6 {
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db_hit_miss db 0
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} {{0 0 0} {0 0 0}}
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do_test 1.7 {
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set fd [db incrblob main t1 b 1]
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fconfigure $fd -translation binary
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set len [string length [read $fd]]
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close $fd
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set len
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} 600
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do_test 1.8 { sqlite3_db_status db CACHE_HIT 0 } {0 2 0}
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do_test 1.9 { sqlite3_db_status db CACHE_MISS 0 } {0 1 0}
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do_test 2.1 { db_write db } {0 0 0}
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do_test 2.2 {
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execsql { INSERT INTO t1 VALUES(4, randomblob(600)) }
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db_write db
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} {0 4 0}
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do_test 2.3 { db_write db 1 } {0 4 0}
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do_test 2.4 { db_write db 0 } {0 0 0}
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do_test 2.5 { db_write db 1 } {0 0 0}
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ifcapable wal {
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do_test 2.6 {
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execsql { PRAGMA journal_mode = WAL }
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db_write db 1
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} {0 1 0}
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}
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do_test 2.7 {
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execsql { INSERT INTO t1 VALUES(5, randomblob(600)) }
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db_write db
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} {0 4 0}
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do_test 2.8 { db_write db 1 } {0 4 0}
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do_test 2.9 { db_write db 0 } {0 0 0}
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finish_test
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