gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/tt3_index.c (about) 1 /* 2 ** 2014 December 9 3 ** 4 ** The author disclaims copyright to this source code. In place of 5 ** a legal notice, here is a blessing: 6 ** 7 ** May you do good and not evil. 8 ** May you find forgiveness for yourself and forgive others. 9 ** May you share freely, never taking more than you give. 10 ** 11 ************************************************************************* 12 ** 13 ** create_drop_index_1 14 */ 15 16 17 static char *create_drop_index_thread(int iTid, void *pArg){ 18 Error err = {0}; /* Error code and message */ 19 Sqlite db = {0}; /* SQLite database connection */ 20 21 while( !timetostop(&err) ){ 22 opendb(&err, &db, "test.db", 0); 23 24 sql_script(&err, &db, 25 "DROP INDEX IF EXISTS i1;" 26 "DROP INDEX IF EXISTS i2;" 27 "DROP INDEX IF EXISTS i3;" 28 "DROP INDEX IF EXISTS i4;" 29 30 "CREATE INDEX IF NOT EXISTS i1 ON t11(a);" 31 "CREATE INDEX IF NOT EXISTS i2 ON t11(b);" 32 "CREATE INDEX IF NOT EXISTS i3 ON t11(c);" 33 "CREATE INDEX IF NOT EXISTS i4 ON t11(d);" 34 35 "SELECT * FROM t11 ORDER BY a;" 36 "SELECT * FROM t11 ORDER BY b;" 37 "SELECT * FROM t11 ORDER BY c;" 38 "SELECT * FROM t11 ORDER BY d;" 39 ); 40 clear_error(&err, SQLITE_LOCKED); 41 42 closedb(&err, &db); 43 } 44 45 print_and_free_err(&err); 46 return sqlite3_mprintf("ok"); 47 } 48 49 static void create_drop_index_1(int nMs){ 50 Error err = {0}; 51 Sqlite db = {0}; 52 Threadset threads = {0}; 53 54 opendb(&err, &db, "test.db", 1); 55 sql_script(&err, &db, 56 "CREATE TABLE t11(a, b, c, d);" 57 "WITH data(x) AS (SELECT 1 UNION ALL SELECT x+1 FROM data WHERE x<100) " 58 "INSERT INTO t11 SELECT x,x,x,x FROM data;" 59 ); 60 closedb(&err, &db); 61 62 setstoptime(&err, nMs); 63 64 sqlite3_enable_shared_cache(1); 65 launch_thread(&err, &threads, create_drop_index_thread, 0); 66 launch_thread(&err, &threads, create_drop_index_thread, 0); 67 launch_thread(&err, &threads, create_drop_index_thread, 0); 68 launch_thread(&err, &threads, create_drop_index_thread, 0); 69 launch_thread(&err, &threads, create_drop_index_thread, 0); 70 71 join_all_threads(&err, &threads); 72 sqlite3_enable_shared_cache(0); 73 print_and_free_err(&err); 74 }