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146 lines
3.3 KiB
Plaintext
146 lines
3.3 KiB
Plaintext
# 2004 September 2
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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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# This file implements regression tests for SQLite library. The
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# focus of this script testing the callback-free C/C++ API and in
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# particular the behavior of sqlite3_step() when trying to commit
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# with lock contention.
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#
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# $Id: capi3b.test,v 1.4 2007/08/10 19:46:14 drh Exp $
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# These tests depend on the pager holding changes in cache
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# until it is time to commit. But that won't happen if the
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# soft-heap-limit is set too low. So disable the soft heap limit
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# for the duration of this test.
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#
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sqlite3_soft_heap_limit 0
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set DB [sqlite3_connection_pointer db]
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sqlite3 db2 test.db
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set DB2 [sqlite3_connection_pointer db2]
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# Create some data in the database
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#
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do_test capi3b-1.1 {
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execsql {
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CREATE TABLE t1(x);
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INSERT INTO t1 VALUES(1);
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INSERT INTO t1 VALUES(2);
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SELECT * FROM t1
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}
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} {1 2}
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# Make sure the second database connection can see the data
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#
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do_test capi3b-1.2 {
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execsql {
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SELECT * FROM t1
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} db2
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} {1 2}
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# First database connection acquires a shared lock
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#
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do_test capi3b-1.3 {
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execsql {
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BEGIN;
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SELECT * FROM t1;
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}
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} {1 2}
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# Second database connection tries to write. The sqlite3_step()
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# function returns SQLITE_BUSY because it cannot commit.
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#
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do_test capi3b-1.4 {
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set VM [sqlite3_prepare $DB2 {INSERT INTO t1 VALUES(3)} -1 TAIL]
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sqlite3_step $VM
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} SQLITE_BUSY
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# The sqlite3_step call can be repeated multiple times.
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#
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do_test capi3b-1.5.1 {
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sqlite3_step $VM
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} SQLITE_BUSY
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do_test capi3b-1.5.2 {
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sqlite3_step $VM
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} SQLITE_BUSY
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# The first connection closes its transaction. This allows the second
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# connections sqlite3_step to succeed.
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#
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do_test capi3b-1.6 {
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execsql COMMIT
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sqlite3_step $VM
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} SQLITE_DONE
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do_test capi3b-1.7 {
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sqlite3_finalize $VM
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} SQLITE_OK
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do_test capi3b-1.8 {
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execsql {SELECT * FROM t1} db2
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} {1 2 3}
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do_test capi3b-1.9 {
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execsql {SELECT * FROM t1}
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} {1 2 3}
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# Start doing a SELECT with one connection. This gets a SHARED lock.
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# Then do an INSERT with the other connection. The INSERT should
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# not be able to complete until the SELECT finishes.
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#
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do_test capi3b-2.1 {
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set VM1 [sqlite3_prepare $DB {SELECT * FROM t1} -1 TAIL]
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sqlite3_step $VM1
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} SQLITE_ROW
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do_test capi3b-2.2 {
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sqlite3_column_text $VM1 0
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} 1
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do_test capi3b-2.3 {
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set VM2 [sqlite3_prepare $DB2 {INSERT INTO t1 VALUES(4)} -1 TAIL]
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sqlite3_step $VM2
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} SQLITE_BUSY
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do_test capi3b-2.4 {
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sqlite3_step $VM1
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} SQLITE_ROW
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do_test capi3b-2.5 {
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sqlite3_column_text $VM1 0
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} 2
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do_test capi3b-2.6 {
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sqlite3_step $VM2
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} SQLITE_BUSY
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do_test capi3b-2.7 {
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sqlite3_step $VM1
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} SQLITE_ROW
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do_test capi3b-2.8 {
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sqlite3_column_text $VM1 0
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} 3
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do_test capi3b-2.9 {
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sqlite3_step $VM2
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} SQLITE_BUSY
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do_test capi3b-2.10 {
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sqlite3_step $VM1
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} SQLITE_DONE
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do_test capi3b-2.11 {
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sqlite3_step $VM2
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} SQLITE_DONE
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do_test capi3b-2.12 {
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sqlite3_finalize $VM1
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sqlite3_finalize $VM2
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execsql {SELECT * FROM t1}
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} {1 2 3 4}
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catch {db2 close}
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sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)
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finish_test
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