120 lines
2.8 KiB
Plaintext
120 lines
2.8 KiB
Plaintext
# 2007 May 02
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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 file is testing of the zero-filled blob functionality
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# including the sqlite3_bind_zeroblob(), sqlite3_result_zeroblob(),
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# and the built-in zeroblob() SQL function.
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#
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# $Id: zeroblob.test,v 1.2 2007/05/02 16:51:59 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# When zeroblob() is used for the last field of a column, then the
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# content of the zeroblob is never instantiated on the VDBE stack.
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# But it does get inserted into the database correctly.
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#
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do_test zeroblob-1.1 {
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execsql {
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CREATE TABLE t1(a,b,c,d);
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}
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set ::sqlite3_max_blobsize 0
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execsql {
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INSERT INTO t1 VALUES(2,3,4,zeroblob(10000));
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}
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set ::sqlite3_max_blobsize
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} {10}
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do_test zeroblob-1.2 {
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execsql {
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SELECT length(d) FROM t1
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}
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} {10000}
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# If a non-NULL column follows the zeroblob, then the content of
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# the zeroblob must be instantiated.
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#
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do_test zeroblob-1.3 {
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set ::sqlite3_max_blobsize 0
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execsql {
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INSERT INTO t1 VALUES(3,4,zeroblob(10000),5);
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}
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set ::sqlite3_max_blobsize
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} {10010}
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do_test zeroblob-1.4 {
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execsql {
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SELECT length(c), length(d) FROM t1
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}
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} {1 10000 10000 1}
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# Multiple zeroblobs can appear at the end of record. No instantiation
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# of the blob content occurs on the stack.
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#
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do_test zeroblob-1.5 {
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set ::sqlite3_max_blobsize 0
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execsql {
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INSERT INTO t1 VALUES(4,5,zeroblob(10000),zeroblob(10000));
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}
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set ::sqlite3_max_blobsize
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} {11}
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do_test zeroblob-1.6 {
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execsql {
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SELECT length(c), length(d) FROM t1
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}
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} {1 10000 10000 1 10000 10000}
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# NULLs can follow the zeroblob() or be intermixed with zeroblobs and
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# no instantiation of the zeroblobs occurs on the stack.
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#
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do_test zeroblob-1.7 {
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set ::sqlite3_max_blobsize 0
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execsql {
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INSERT INTO t1 VALUES(5,zeroblob(10000),NULL,zeroblob(10000));
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}
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set ::sqlite3_max_blobsize
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} {10}
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do_test zeroblob-1.8 {
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execsql {
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SELECT length(b), length(d) FROM t1 WHERE a=5
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}
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} {10000 10000}
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# Comparisons against zeroblobs work.
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#
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do_test zeroblob-2.1 {
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execsql {
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SELECT a FROM t1 WHERE b=zeroblob(10000)
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}
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} {5}
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# Comparisons against zeroblobs work even when indexed.
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#
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do_test zeroblob-2.2 {
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execsql {
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CREATE INDEX i1_1 ON t1(b);
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SELECT a FROM t1 WHERE b=zeroblob(10000);
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}
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} {5}
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# DISTINCT works for zeroblobs
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#
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do_test zeroblob-3.1 {
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execsql {
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SELECT count(DISTINCT a) FROM (
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SELECT x'00000000000000000000' AS a
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UNION ALL
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SELECT zeroblob(10) AS a
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)
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}
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} {1}
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finish_test
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