| Index: third_party/sqlite/test/pageropt.test
|
| ===================================================================
|
| --- third_party/sqlite/test/pageropt.test (revision 56608)
|
| +++ third_party/sqlite/test/pageropt.test (working copy)
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| @@ -1,199 +0,0 @@
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| -# 2007 April 12
|
| -#
|
| -# 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.
|
| -#
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| -#***********************************************************************
|
| -# This file implements regression tests for SQLite library.
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| -# The focus of the tests in this file are to verify that the
|
| -# pager optimizations implemented in version 3.3.14 work.
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| -#
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| -# $Id: pageropt.test,v 1.5 2008/08/20 14:49:25 danielk1977 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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| -
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| -ifcapable {!pager_pragmas||secure_delete} {
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| - finish_test
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| - return
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| -}
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| -
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| -# Run the SQL statement supplied by the argument and return
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| -# the results. Prepend four integers to the beginning of the
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| -# result which are
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| -#
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| -# (1) The number of page reads from the database
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| -# (2) The number of page writes to the database
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| -# (3) The number of page writes to the journal
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| -# (4) The number of cache pages freed
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| -#
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| -proc pagercount_sql {sql {db db}} {
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| - global sqlite3_pager_readdb_count
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| - global sqlite3_pager_writedb_count
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| - global sqlite3_pager_writej_count
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| - global sqlite3_pager_pgfree_count
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| - set sqlite3_pager_readdb_count 0
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| - set sqlite3_pager_writedb_count 0
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| - set sqlite3_pager_writej_count 0
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| - set r [$db eval $sql]
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| - set cnt [list $sqlite3_pager_readdb_count \
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| - $sqlite3_pager_writedb_count \
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| - $sqlite3_pager_writej_count ]
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| - return [concat $cnt $r]
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| -}
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| -
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| -# Setup the test database
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| -#
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| -do_test pageropt-1.1 {
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| - sqlite3_soft_heap_limit 0
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| - execsql {
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| - PRAGMA auto_vacuum = OFF;
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| - PRAGMA page_size = 1024;
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| - }
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| - pagercount_sql {
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| - CREATE TABLE t1(x);
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| - }
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| -} {0 2 0}
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| -do_test pageropt-1.2 {
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| - pagercount_sql {
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| - INSERT INTO t1 VALUES(randomblob(5000));
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| - }
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| -} {0 6 2}
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| -
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| -# Verify that values remain in cache on for subsequent reads.
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| -# We should not have to go back to disk.
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| -#
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| -do_test pageropt-1.3 {
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| - pagercount_sql {
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| - SELECT length(x) FROM t1
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| - }
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| -} {0 0 0 5000}
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| -
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| -# If another thread reads the database, the original cache
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| -# remains valid.
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| -#
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| -sqlite3 db2 test.db
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| -set blobcontent [db2 one {SELECT hex(x) FROM t1}]
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| -do_test pageropt-1.4 {
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| - pagercount_sql {
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| - SELECT hex(x) FROM t1
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| - }
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| -} [list 0 0 0 $blobcontent]
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| -
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| -# But if the other thread modifies the database, then the cache
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| -# must refill.
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| -#
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| -do_test pageropt-1.5 {
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| - db2 eval {CREATE TABLE t2(y)}
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| - pagercount_sql {
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| - SELECT hex(x) FROM t1
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| - }
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| -} [list 6 0 0 $blobcontent]
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| -do_test pageropt-1.6 {
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| - pagercount_sql {
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| - SELECT hex(x) FROM t1
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| - }
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| -} [list 0 0 0 $blobcontent]
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| -
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| -# Verify that the last page of an overflow chain is not read from
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| -# disk when deleting a row. The one row of t1(x) has four pages
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| -# of overflow. So deleting that row from t1 should involve reading
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| -# the sqlite_master table (1 page) the main page of t1 (1 page) and
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| -# the three overflow pages of t1 for a total of 5 pages.
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| -#
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| -# Pages written are page 1 (for the freelist pointer), the root page
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| -# of the table, and one of the overflow chain pointers because it
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| -# becomes the trunk of the freelist. Total 3.
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| -#
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| -do_test pageropt-2.1 {
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| - db close
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| - sqlite3 db test.db
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| - pagercount_sql {
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| - DELETE FROM t1 WHERE rowid=1
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| - }
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| -} {5 3 3}
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| -
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| -# When pulling pages off of the freelist, there is no reason
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| -# to actually bring in the old content.
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| -#
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| -do_test pageropt-2.2 {
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| - db close
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| - sqlite3 db test.db
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| - pagercount_sql {
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| - INSERT INTO t1 VALUES(randomblob(1500));
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| - }
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| -} {3 4 3}
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| -do_test pageropt-2.3 {
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| - pagercount_sql {
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| - INSERT INTO t1 VALUES(randomblob(1500));
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| - }
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| -} {0 4 3}
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| -
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| -# Note the new optimization that when pulling the very last page off of the
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| -# freelist we do not read the content of that page.
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| -#
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| -do_test pageropt-2.4 {
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| - pagercount_sql {
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| - INSERT INTO t1 VALUES(randomblob(1500));
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| - }
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| -} {0 5 3}
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| -
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| -# Appending a large quantity of data does not involve writing much
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| -# to the journal file.
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| -#
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| -do_test pageropt-3.1 {
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| - pagercount_sql {
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| - INSERT INTO t2 SELECT * FROM t1;
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| - }
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| -} {1 7 2}
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| -
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| -# Once again, we do not need to read the last page of an overflow chain
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| -# while deleting.
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| -#
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| -do_test pageropt-3.2 {
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| - pagercount_sql {
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| - DROP TABLE t2;
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| - }
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| -} {0 2 3}
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| -do_test pageropt-3.3 {
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| - pagercount_sql {
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| - DELETE FROM t1;
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| - }
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| -} {0 3 3}
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| -
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| -# There are now 11 pages on the freelist. Move them all into an
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| -# overflow chain by inserting a single large record. Starting from
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| -# a cold cache, only page 1, the root page of table t1, and the trunk
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| -# of the freelist need to be read (3 pages). And only those three
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| -# pages need to be journalled. But 13 pages need to be written:
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| -# page1, the root page of table t1, and an 11 page overflow chain.
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| -#
|
| -do_test pageropt-4.1 {
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| - db close
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| - sqlite3 db test.db
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| - pagercount_sql {
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| - INSERT INTO t1 VALUES(randomblob(11300))
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| - }
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| -} {3 13 3}
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| -
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| -# Now we delete that big entries starting from a cold cache and an
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| -# empty freelist. The first 10 of the 11 pages overflow chain have
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| -# to be read, together with page1 and the root of the t1 table. 12
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| -# reads total. But only page1, the t1 root, and the trunk of the
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| -# freelist need to be journalled and written back.
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| -#
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| -do_test pageropt-4.2 {
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| - db close
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| - sqlite3 db test.db
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| - pagercount_sql {
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| - DELETE FROM t1
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| - }
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| -} {12 3 3}
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| -
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| -sqlite3_soft_heap_limit $soft_limit
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| -catch {db2 close}
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| -finish_test
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|
|