75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/*
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** 2014 December 9
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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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** create_drop_index_1
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*/
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static char *create_drop_index_thread(int iTid, int iArg){
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Error err = {0}; /* Error code and message */
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Sqlite db = {0}; /* SQLite database connection */
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while( !timetostop(&err) ){
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opendb(&err, &db, "test.db", 0);
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sql_script(&err, &db,
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"DROP INDEX IF EXISTS i1;"
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"DROP INDEX IF EXISTS i2;"
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"DROP INDEX IF EXISTS i3;"
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"DROP INDEX IF EXISTS i4;"
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"CREATE INDEX IF NOT EXISTS i1 ON t1(a);"
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"CREATE INDEX IF NOT EXISTS i2 ON t1(b);"
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"CREATE INDEX IF NOT EXISTS i3 ON t1(c);"
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"CREATE INDEX IF NOT EXISTS i4 ON t1(d);"
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"SELECT * FROM t1 ORDER BY a;"
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"SELECT * FROM t1 ORDER BY b;"
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"SELECT * FROM t1 ORDER BY c;"
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"SELECT * FROM t1 ORDER BY d;"
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);
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closedb(&err, &db);
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}
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print_and_free_err(&err);
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return sqlite3_mprintf("ok");
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}
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static void create_drop_index_1(int nMs){
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Error err = {0};
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Sqlite db = {0};
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Threadset threads = {0};
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opendb(&err, &db, "test.db", 1);
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sql_script(&err, &db,
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"CREATE TABLE t1(a, b, c, d);"
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"WITH data(x) AS (SELECT 1 UNION ALL SELECT x+1 FROM data WHERE x<100) "
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"INSERT INTO t1 SELECT x,x,x,x FROM data;"
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);
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closedb(&err, &db);
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setstoptime(&err, nMs);
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sqlite3_enable_shared_cache(1);
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launch_thread(&err, &threads, create_drop_index_thread, 0);
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launch_thread(&err, &threads, create_drop_index_thread, 0);
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launch_thread(&err, &threads, create_drop_index_thread, 0);
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launch_thread(&err, &threads, create_drop_index_thread, 0);
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launch_thread(&err, &threads, create_drop_index_thread, 0);
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join_all_threads(&err, &threads);
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sqlite3_enable_shared_cache(0);
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print_and_free_err(&err);
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}
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