# 2017 August 07 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # This file implements regression tests for SQLite library. The # focus of this script testing the ability of SQLite to use mmap # to access files larger than 4GiB. # if {[file exists skip-big-file]} return if {$tcl_platform(os)=="Darwin"} return set testdir [file dirname $argv0] source $testdir/tester.tcl set testprefix bigmmap ifcapable !mmap||!vtab { finish_test return } set mmap_limit 0 db eval { SELECT compile_options AS x FROM pragma_compile_options WHERE x LIKE 'max_mmap_size=%' } { regexp {MAX_MMAP_SIZE=([0-9]*)} $x -> mmap_limit } if {$mmap_limit < [expr 8 * 1<<30]} { puts "Skipping bigmmap.test - requires SQLITE_MAX_MMAP_SIZE >= 8G" finish_test return } #------------------------------------------------------------------------- # Create the database file roughly 8GiB in size. Most pages are unused, # except that there is a table and index clustered around each 1GiB # boundary. # do_execsql_test 1.0 { PRAGMA page_size = 4096; CREATE TABLE t0(a INTEGER PRIMARY KEY, b, c, UNIQUE(b, c)); WITH s(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM s LIMIT 100 ) INSERT INTO t0 SELECT i, 't0', randomblob(800) FROM s; } for {set i 1} {$i < 8} {incr i} { fake_big_file [expr $i*1024] [get_pwd]/test.db hexio_write test.db 28 [format %.8x [expr ($i*1024*1024*1024/4096) - 5]] do_execsql_test 1.$i " CREATE TABLE t$i (a INTEGER PRIMARY KEY, b, c, UNIQUE(b, c)); WITH s(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM s LIMIT 100 ) INSERT INTO t$i SELECT i, 't$i', randomblob(800) FROM s; " } #------------------------------------------------------------------------- # Check that data can be retrieved from the db with a variety of # configured mmap size limits. # for {set i 0} {$i < 9} {incr i} { # Configure a memory mapping $i GB in size. # set val [expr $i*1024*1024*1024] execsql "PRAGMA main.mmap_size = $val" do_execsql_test 2.$i.0 { PRAGMA main.mmap_size } $val for {set t 0} {$t < 8} {incr t} { do_execsql_test 2.$i.$t.1 " SELECT count(*) FROM t$t; SELECT count(b || c) FROM t$t GROUP BY b; " {100 100} do_execsql_test 2.$i.$t.2 " SELECT * FROM t$t AS o WHERE NOT EXISTS( SELECT * FROM t$t AS i WHERE a=o.a AND +b=o.b AND +c=o.c ) ORDER BY b, c; " {} do_eqp_test 2.$i.$t.3 " SELECT * FROM t$t AS o WHERE NOT EXISTS( SELECT * FROM t$t AS i WHERE a=o.a AND +b=o.b AND +c=o.c ) ORDER BY b, c; " " 0 0 0 {SCAN TABLE t$t AS o USING COVERING INDEX sqlite_autoindex_t${t}_1} 0 0 0 {EXECUTE CORRELATED SCALAR SUBQUERY 1} 1 0 0 {SEARCH TABLE t$t AS i USING INTEGER PRIMARY KEY (rowid=?)} " } } finish_test