wasCSharpSQLite – Rev 1
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# 2007 May 02
#
# 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 regression tests for SQLite library. The
# focus of this file is testing of the zero-filled blob functionality
# including the sqlite3_bind_zeroblob(), sqlite3_result_zeroblob(),
# and the built-in zeroblob() SQL function.
#
# $Id: zeroblob.test,v 1.14 2009/07/14 02:33:02 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !incrblob {
finish_test
return
}
# When zeroblob() is used for the last field of a column, then the
# content of the zeroblob is never instantiated on the VDBE stack.
# But it does get inserted into the database correctly.
#
db eval {PRAGMA cache_size=10}
sqlite3_memory_highwater 1
unset -nocomplain memused
set memused [sqlite3_memory_used]
do_test zeroblob-1.1 {
execsql {
CREATE TABLE t1(a,b,c,d);
}
set ::sqlite3_max_blobsize 0
execsql {
INSERT INTO t1 VALUES(2,3,4,zeroblob(1000000));
}
set ::sqlite3_max_blobsize
} {10}
do_test zeroblob-1.1.1 {
expr {[sqlite3_memory_highwater]<$::memused+25000}
} {1}
do_test zeroblob-1.2 {
execsql {
SELECT length(d) FROM t1
}
} {1000000}
# If a non-NULL column follows the zeroblob, then the content of
# the zeroblob must be instantiated.
#
do_test zeroblob-1.3 {
set ::sqlite3_max_blobsize 0
execsql {
INSERT INTO t1 VALUES(3,4,zeroblob(10000),5);
}
set ::sqlite3_max_blobsize
} {10010}
do_test zeroblob-1.4 {
execsql {
SELECT length(c), length(d) FROM t1
}
} {1 1000000 10000 1}
# Multiple zeroblobs can appear at the end of record. No instantiation
# of the blob content occurs on the stack.
#
do_test zeroblob-1.5 {
set ::sqlite3_max_blobsize 0
execsql {
INSERT INTO t1 VALUES(4,5,zeroblob(10000),zeroblob(10000));
}
set ::sqlite3_max_blobsize
} {11}
do_test zeroblob-1.6 {
execsql {
SELECT length(c), length(d) FROM t1
}
} {1 1000000 10000 1 10000 10000}
# NULLs can follow the zeroblob() or be intermixed with zeroblobs and
# no instantiation of the zeroblobs occurs on the stack.
#
do_test zeroblob-1.7 {
set ::sqlite3_max_blobsize 0
execsql {
INSERT INTO t1 VALUES(5,zeroblob(10000),NULL,zeroblob(10000));
}
set ::sqlite3_max_blobsize
} {10}
do_test zeroblob-1.8 {
execsql {
SELECT length(b), length(d) FROM t1 WHERE a=5
}
} {10000 10000}
# Comparisons against zeroblobs work.
#
do_test zeroblob-2.1 {
execsql {
SELECT a FROM t1 WHERE b=zeroblob(10000)
}
} {5}
# Comparisons against zeroblobs work even when indexed.
#
do_test zeroblob-2.2 {
execsql {
CREATE INDEX i1_1 ON t1(b);
SELECT a FROM t1 WHERE b=zeroblob(10000);
}
} {5}
# DISTINCT works for zeroblobs
#
ifcapable bloblit&&subquery&&compound {
do_test zeroblob-3.1 {
execsql {
SELECT count(DISTINCT a) FROM (
SELECT x'00000000000000000000' AS a
UNION ALL
SELECT zeroblob(10) AS a
)
}
} {1}
}
# Concatentation works with zeroblob
#
ifcapable bloblit {
do_test zeroblob-4.1 {
execsql {
SELECT hex(zeroblob(2) || x'61')
}
} {000061}
}
# Check various CAST(...) operations on zeroblob.
#
do_test zeroblob-5.1 {
execsql {
SELECT CAST (zeroblob(100) AS REAL);
}
} {0.0}
do_test zeroblob-5.2 {
execsql {
SELECT CAST (zeroblob(100) AS INTEGER);
}
} {0}
do_test zeroblob-5.3 {
execsql {
SELECT CAST (zeroblob(100) AS TEXT);
}
} {{}}
do_test zeroblob-5.4 {
execsql {
SELECT CAST(zeroblob(100) AS BLOB);
}
} [execsql {SELECT zeroblob(100)}]
# Check for malicious use of zeroblob. Make sure nothing crashes.
#
do_test zeroblob-6.1.1 {
execsql {select zeroblob(-1)}
} {{}}
do_test zeroblob-6.1.2 {
execsql {select zeroblob(-10)}
} {{}}
do_test zeroblob-6.1.3 {
execsql {select zeroblob(-100)}
} {{}}
do_test zeroblob-6.2 {
execsql {select length(zeroblob(-1))}
} {0}
do_test zeroblob-6.3 {
execsql {select zeroblob(-1)|1}
} {1}
do_test zeroblob-6.4 {
catchsql {select length(zeroblob(2147483648))}
} {1 {string or blob too big}}
do_test zeroblob-6.5 {
catchsql {select zeroblob(2147483648)}
} {1 {string or blob too big}}
do_test zeroblob-6.6 {
execsql {select hex(zeroblob(-1))}
} {{}}
do_test zeroblob-6.7 {
execsql {select typeof(zeroblob(-1))}
} {blob}
# Test bind_zeroblob()
#
sqlite3_memory_highwater 1
unset -nocomplain memused
set memused [sqlite3_memory_used]
do_test zeroblob-7.1 {
set ::STMT [sqlite3_prepare $::DB "SELECT length(?)" -1 DUMMY]
set ::sqlite3_max_blobsize 0
sqlite3_bind_zeroblob $::STMT 1 450000
sqlite3_step $::STMT
} {SQLITE_ROW}
do_test zeroblob-7.2 {
sqlite3_column_int $::STMT 0
} {450000}
do_test zeroblob-7.3 {
sqlite3_finalize $::STMT
} {SQLITE_OK}
do_test zeroblob-7.4 {
set ::sqlite3_max_blobsize
} {0}
do_test zeroblob-7.5 {
expr {[sqlite3_memory_highwater]<$::memused+10000}
} {1}
# Test that MakeRecord can handle a value with some real content
# and a zero-blob tail.
#
do_test zeroblob-8.1 {
llength [execsql {
SELECT 'hello' AS a, zeroblob(10) as b from t1 ORDER BY a, b;
}]
} {8}
# Ticket #3965
# zeroblobs on either size of an IN operator
#
do_test zeroblob-9.1 {
db eval {SELECT x'0000' IN (x'000000')}
} {0}
do_test zeroblob-9.2 {
db eval {SELECT x'0000' IN (x'0000')}
} {1}
do_test zeroblob-9.3 {
db eval {SELECT zeroblob(2) IN (x'000000')}
} {0}
do_test zeroblob-9.4 {
db eval {SELECT zeroblob(2) IN (x'0000')}
} {1}
do_test zeroblob-9.5 {
db eval {SELECT x'0000' IN (zeroblob(3))}
} {0}
do_test zeroblob-9.6 {
db eval {SELECT x'0000' IN (zeroblob(2))}
} {1}
do_test zeroblob-9.7 {
db eval {SELECT zeroblob(2) IN (zeroblob(3))}
} {0}
do_test zeroblob-9.8 {
db eval {SELECT zeroblob(2) IN (zeroblob(2))}
} {1}
finish_test