| # 2021-10-15 |
| # |
| # 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 file is testing the sqlite3_autovacuum_pages() interface |
| # |
| |
| set testdir [file dirname $argv0] |
| source $testdir/tester.tcl |
| |
| # If this build of the library does not support auto-vacuum, omit this |
| # whole file. |
| ifcapable {!autovacuum || !pragma} { |
| finish_test |
| return |
| } |
| |
| # Demonstrate basic sqlite3_autovacuum_pages functionality |
| # |
| do_execsql_test autovacuum2-1.0 { |
| PRAGMA page_size=1024; |
| PRAGMA auto_vacuum=FULL; |
| CREATE TABLE t1(x); |
| VACUUM; |
| INSERT INTO t1(x) VALUES(zeroblob(10000)); |
| PRAGMA page_count; |
| } {12} |
| proc autovac_page_callback {schema filesize freesize pagesize} { |
| global autovac_callback_data |
| lappend autovac_callback_data $schema $filesize $freesize $pagesize |
| return [expr {$freesize/2}] |
| } |
| sqlite3_autovacuum_pages db autovac_page_callback |
| set autovac_callback_data {} |
| do_execsql_test autovacuum2-1.1 { |
| BEGIN; |
| DELETE FROM t1; |
| PRAGMA freelist_count; |
| PRAGMA page_count; |
| } {9 12} |
| do_execsql_test autovacuum2-1.2 { |
| COMMIT; |
| } {} |
| do_test autovacuum2-1.3 { |
| set autovac_callback_data |
| } {main 12 9 1024} |
| do_execsql_test autovacuum2-1.4 { |
| PRAGMA freelist_count; |
| PRAGMA page_count; |
| } {5 8} |
| do_execsql_test autovacuum2-1.5 { |
| PRAGMA integrity_check; |
| } {ok} |
| |
| # Disable the autovacuum-pages callback. Then do any transaction. |
| # The database should shrink to minimal size |
| # |
| sqlite3_autovacuum_pages db |
| do_execsql_test autovacuum2-1.10 { |
| CREATE TABLE t2(x); |
| PRAGMA freelist_count; |
| } {0} |
| |
| # Rig the autovacuum-pages callback to always return zero. No |
| # autovacuum will happen. |
| # |
| proc autovac_page_callback_off {schema filesize freesize pagesize} { |
| return 0 |
| } |
| sqlite3_autovacuum_pages db autovac_page_callback_off |
| do_execsql_test autovacuum2-1.20 { |
| BEGIN; |
| INSERT INTO t1(x) VALUES(zeroblob(10000)); |
| DELETE FROM t1; |
| PRAGMA freelist_count; |
| COMMIT; |
| PRAGMA freelist_count; |
| } {9 9} |
| |
| finish_test |