# 2015-01-30 # # 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 tests for SQLite library. # # The focus of this file is adding extra entries in the symbol table # using sqlite3_test_control(SQLITE_TESTCTRL_IMPOSTER) and verifying that # SQLite handles those as expected. # set testdir [file dirname $argv0] source $testdir/tester.tcl set testprefix imposter # Create a bunch of data to sort against # do_test imposter-1.0 { execsql { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d NOT NULL); CREATE INDEX t1b ON t1(b); CREATE UNIQUE INDEX t1c ON t1(c); WITH RECURSIVE c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<30) INSERT INTO t1(a,b,c,d) SELECT i,1000+i,2000+i,3000+i FROM c; } set t1_root [db one {SELECT rootpage FROM sqlite_master WHERE name='t1'}] set t1b_root [db one {SELECT rootpage FROM sqlite_master WHERE name='t1b'}] set t1c_root [db one {SELECT rootpage FROM sqlite_master WHERE name='t1c'}] # Create an imposter table that uses the same b-tree as t1 but which does # not have the indexes # sqlite3_test_control SQLITE_TESTCTRL_IMPOSTER db main 1 $t1_root db eval {CREATE TABLE xt1(a,b,c,d)} # And create an imposter table for the t1c index. sqlite3_test_control SQLITE_TESTCTRL_IMPOSTER db main 1 $t1c_root db eval {CREATE TABLE xt1c(c,rowid,PRIMARY KEY(c,rowid))WITHOUT ROWID;} # Go out of imposter mode for now. sqlite3_test_control SQLITE_TESTCTRL_IMPOSTER db main 0 0 # Create triggers to record changes to xt1. # db eval { CREATE TEMP TABLE chnglog(desc TEXT); CREATE TEMP TRIGGER xt1_del AFTER DELETE ON xt1 BEGIN INSERT INTO chnglog VALUES( printf('DELETE t1: rowid=%d, a=%s, b=%s, c=%s, d=%s', old.rowid, quote(old.a), quote(old.b), quote(old.c), quote(old.d))); END; CREATE TEMP TRIGGER xt1_ins AFTER INSERT ON xt1 BEGIN INSERT INTO chnglog VALUES( printf('INSERT t1: rowid=%d, a=%s, b=%s, c=%s, d=%s', new.rowid, quote(new.a), quote(new.b), quote(new.c), quote(new.d))); END; } } {} # The xt1 table has separate xt1.rowid and xt1.a columns. The xt1.rowid # column corresponds to t1.rowid and t1.a, but the xt1.a column is always # NULL # do_execsql_test imposter-1.1 { SELECT rowid FROM xt1 WHERE a IS NOT NULL; } {} do_execsql_test imposter-1.2 { SELECT a,b,c,d FROM t1 EXCEPT SELECT rowid,b,c,d FROM xt1; SELECT rowid,b,c,d FROM xt1 EXCEPT SELECT a,b,c,d FROM t1; } {} # Make changes via the xt1 shadow table. This will not update the # indexes on t1 nor check the uniqueness constraint on t1.c nor check # the NOT NULL constraint on t1.d, resulting in a logically inconsistent # database. # do_execsql_test imposter-1.3 { DELETE FROM xt1 WHERE rowid=5; INSERT INTO xt1(rowid,a,b,c,d) VALUES(99,'hello',1099,2022,NULL); SELECT * FROM chnglog ORDER BY rowid; } [list \ {DELETE t1: rowid=5, a=NULL, b=1005, c=2005, d=3005} \ {INSERT t1: rowid=99, a='hello', b=1099, c=2022, d=NULL} \ ] do_execsql_test imposter-1.4a { PRAGMA integrity_check; } {/NULL value in t1.d/} do_execsql_test imposter-1.4b { PRAGMA integrity_check; } {/row # missing from index t1b/} do_execsql_test imposter-1.4c { PRAGMA integrity_check; } {/row # missing from index t1c/} # Cleanup the corruption. # Then demonstrate that the xt1c imposter table can insert non-unique # and NULL values into the UNIQUE index. # do_execsql_test imposter-2.0 { DELETE FROM t1; WITH RECURSIVE c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<10) INSERT INTO t1(a,b,c,d) SELECT i,i,i,i FROM c; UPDATE xt1c SET c=NULL WHERE rowid=5; PRAGMA integrity_check; } {/row # missing from index t1c/} do_execsql_test imposter-2.1 { DELETE FROM t1; WITH RECURSIVE c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<10) INSERT INTO t1(a,b,c,d) SELECT i,i,i,i FROM c; UPDATE xt1c SET c=99 WHERE rowid IN (5,7,9); SELECT c FROM t1 ORDER BY c; } {1 2 3 4 6 8 10 99 99 99} do_execsql_test imposter-2.2 { UPDATE xt1 SET c=99 WHERE rowid IN (5,7,9); PRAGMA integrity_check; } {/non-unique entry in index t1c/} # Erase the imposter tables # do_test imposter-3.1 { sqlite3_test_control SQLITE_TESTCTRL_IMPOSTER db main 0 1 db eval { DELETE FROM t1 WHERE rowid IN (5,7,9); PRAGMA integrity_check; } } {ok} finish_test