sl@0: # 2007 May 02
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: # This file implements regression tests for SQLite library.  The
sl@0: # focus of this file is testing of the zero-filled blob functionality
sl@0: # including the sqlite3_bind_zeroblob(), sqlite3_result_zeroblob(),
sl@0: # and the built-in zeroblob() SQL function.
sl@0: #
sl@0: # $Id: zeroblob.test,v 1.13 2008/06/13 18:24:28 drh Exp $
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: ifcapable !incrblob {
sl@0:   finish_test
sl@0:   return
sl@0: }
sl@0: 
sl@0: # When zeroblob() is used for the last field of a column, then the
sl@0: # content of the zeroblob is never instantiated on the VDBE stack.
sl@0: # But it does get inserted into the database correctly.
sl@0: #
sl@0: db eval {PRAGMA cache_size=10}
sl@0: sqlite3_memory_highwater 1
sl@0: unset -nocomplain memused
sl@0: set memused [sqlite3_memory_used]
sl@0: do_test zeroblob-1.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t1(a,b,c,d);
sl@0:   }
sl@0:   set ::sqlite3_max_blobsize 0
sl@0:   execsql {
sl@0:     INSERT INTO t1 VALUES(2,3,4,zeroblob(1000000));
sl@0:   }
sl@0:   set ::sqlite3_max_blobsize
sl@0: } {10}
sl@0: do_test zeroblob-1.1.1 {
sl@0:   expr {[sqlite3_memory_highwater]<$::memused+25000}
sl@0: } {1}
sl@0: do_test zeroblob-1.2 {
sl@0:   execsql {
sl@0:     SELECT length(d) FROM t1
sl@0:   }
sl@0: } {1000000}
sl@0: 
sl@0: # If a non-NULL column follows the zeroblob, then the content of
sl@0: # the zeroblob must be instantiated.
sl@0: #
sl@0: do_test zeroblob-1.3 {
sl@0:   set ::sqlite3_max_blobsize 0
sl@0:   execsql {
sl@0:     INSERT INTO t1 VALUES(3,4,zeroblob(10000),5);
sl@0:   }
sl@0:   set ::sqlite3_max_blobsize
sl@0: } {10010}
sl@0: do_test zeroblob-1.4 {
sl@0:   execsql {
sl@0:     SELECT length(c), length(d) FROM t1
sl@0:   }
sl@0: } {1 1000000 10000 1}
sl@0: 
sl@0: # Multiple zeroblobs can appear at the end of record.  No instantiation
sl@0: # of the blob content occurs on the stack.
sl@0: #
sl@0: do_test zeroblob-1.5 {
sl@0:   set ::sqlite3_max_blobsize 0
sl@0:   execsql {
sl@0:     INSERT INTO t1 VALUES(4,5,zeroblob(10000),zeroblob(10000));
sl@0:   }
sl@0:   set ::sqlite3_max_blobsize
sl@0: } {11}
sl@0: do_test zeroblob-1.6 {
sl@0:   execsql {
sl@0:     SELECT length(c), length(d) FROM t1
sl@0:   }
sl@0: } {1 1000000 10000 1 10000 10000}
sl@0: 
sl@0: # NULLs can follow the zeroblob() or be intermixed with zeroblobs and
sl@0: # no instantiation of the zeroblobs occurs on the stack.
sl@0: #
sl@0: do_test zeroblob-1.7 {
sl@0:   set ::sqlite3_max_blobsize 0
sl@0:   execsql {
sl@0:     INSERT INTO t1 VALUES(5,zeroblob(10000),NULL,zeroblob(10000));
sl@0:   }
sl@0:   set ::sqlite3_max_blobsize
sl@0: } {10}
sl@0: do_test zeroblob-1.8 {
sl@0:   execsql {
sl@0:     SELECT length(b), length(d) FROM t1 WHERE a=5
sl@0:   }
sl@0: } {10000 10000}
sl@0: 
sl@0: # Comparisons against zeroblobs work.
sl@0: #
sl@0: do_test zeroblob-2.1 {
sl@0:   execsql {
sl@0:     SELECT a FROM t1 WHERE b=zeroblob(10000)
sl@0:   }
sl@0: } {5}
sl@0: 
sl@0: # Comparisons against zeroblobs work even when indexed.
sl@0: #
sl@0: do_test zeroblob-2.2 {
sl@0:   execsql {
sl@0:     CREATE INDEX i1_1 ON t1(b);
sl@0:     SELECT a FROM t1 WHERE b=zeroblob(10000);
sl@0:   }
sl@0: } {5}
sl@0: 
sl@0: # DISTINCT works for zeroblobs
sl@0: #
sl@0: ifcapable bloblit&&subquery&&compound {
sl@0:   do_test zeroblob-3.1 {
sl@0:     execsql {
sl@0:       SELECT count(DISTINCT a) FROM (
sl@0:         SELECT x'00000000000000000000' AS a
sl@0:         UNION ALL
sl@0:         SELECT zeroblob(10) AS a
sl@0:       )
sl@0:     }
sl@0:   } {1}
sl@0: }
sl@0: 
sl@0: # Concatentation works with zeroblob
sl@0: #
sl@0: ifcapable bloblit {
sl@0:   do_test zeroblob-4.1 {
sl@0:     execsql {
sl@0:       SELECT hex(zeroblob(2) || x'61')
sl@0:     }
sl@0:   } {000061}
sl@0: }
sl@0: 
sl@0: # Check various CAST(...) operations on zeroblob.
sl@0: #
sl@0: do_test zeroblob-5.1 {
sl@0:   execsql {
sl@0:     SELECT CAST (zeroblob(100) AS REAL);
sl@0:   }
sl@0: } {0.0}
sl@0: do_test zeroblob-5.2 {
sl@0:   execsql {
sl@0:     SELECT CAST (zeroblob(100) AS INTEGER);
sl@0:   }
sl@0: } {0}
sl@0: do_test zeroblob-5.3 {
sl@0:   execsql {
sl@0:     SELECT CAST (zeroblob(100) AS TEXT);
sl@0:   }
sl@0: } {{}}
sl@0: do_test zeroblob-5.4 {
sl@0:   execsql {
sl@0:     SELECT CAST(zeroblob(100) AS BLOB);
sl@0:   }
sl@0: } [execsql {SELECT zeroblob(100)}]
sl@0:   
sl@0: 
sl@0: # Check for malicious use of zeroblob.  Make sure nothing crashes.
sl@0: #
sl@0: do_test zeroblob-6.1.1 { 
sl@0:   execsql {select zeroblob(-1)} 
sl@0: } {{}} 
sl@0: do_test zeroblob-6.1.2 { 
sl@0:   execsql {select zeroblob(-10)} 
sl@0: } {{}} 
sl@0: do_test zeroblob-6.1.3 { 
sl@0:   execsql {select zeroblob(-100)} 
sl@0: } {{}} 
sl@0: do_test zeroblob-6.2 { 
sl@0:   execsql {select length(zeroblob(-1))} 
sl@0: } {0} 
sl@0: do_test zeroblob-6.3 { 
sl@0:   execsql {select zeroblob(-1)|1} 
sl@0: } {1} 
sl@0: do_test zeroblob-6.4 { 
sl@0:   catchsql {select length(zeroblob(2147483648))} 
sl@0: } {1 {string or blob too big}} 
sl@0: do_test zeroblob-6.5 { 
sl@0:   catchsql {select zeroblob(2147483648)} 
sl@0: } {1 {string or blob too big}}
sl@0: do_test zeroblob-6.6 {
sl@0:   execsql {select hex(zeroblob(-1))}
sl@0: } {{}}
sl@0: do_test zeroblob-6.7 {
sl@0:   execsql {select typeof(zeroblob(-1))}
sl@0: } {blob}
sl@0: 
sl@0: # Test bind_zeroblob()
sl@0: #
sl@0: sqlite3_memory_highwater 1
sl@0: unset -nocomplain memused
sl@0: set memused [sqlite3_memory_used]
sl@0: do_test zeroblob-7.1 {
sl@0:   set ::STMT [sqlite3_prepare $::DB "SELECT length(?)" -1 DUMMY]
sl@0:   set ::sqlite3_max_blobsize 0
sl@0:   sqlite3_bind_zeroblob $::STMT 1 450000
sl@0:   sqlite3_step $::STMT
sl@0: } {SQLITE_ROW}
sl@0: do_test zeroblob-7.2 {
sl@0:   sqlite3_column_int $::STMT 0
sl@0: } {450000}
sl@0: do_test zeroblob-7.3 {
sl@0:   sqlite3_finalize $::STMT
sl@0: } {SQLITE_OK}
sl@0: do_test zeroblob-7.4 {
sl@0:   set ::sqlite3_max_blobsize
sl@0: } {0}
sl@0: do_test zeroblob-7.5 {
sl@0:   expr {[sqlite3_memory_highwater]<$::memused+10000}
sl@0: } {1}
sl@0: 
sl@0: # Test that MakeRecord can handle a value with some real content
sl@0: # and a zero-blob tail.
sl@0: #
sl@0: do_test zeroblob-8.1 {
sl@0:   llength [execsql {
sl@0:     SELECT 'hello' AS a, zeroblob(10) as b from t1 ORDER BY a, b;
sl@0:   }]
sl@0: } {8}
sl@0: 
sl@0: 
sl@0: finish_test