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Fix a code generator bug caused by the new CSE optimization. Add test cases

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to prevent a recurrence. (CVS 5011)

FossilOrigin-Name: d04246a46399e839e70b1bd57e209f80143f0d5b
This commit is contained in:
drh
2008-04-15 12:14:21 +00:00
parent 5f3a367bf3
commit 191b54cb5d
9 changed files with 117 additions and 32 deletions
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30
src/test_func.c
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@@ -12,7 +12,7 @@
** Code for testing all sorts of SQLite interfaces. This code
** implements new SQL functions used by the test scripts.
**
** $Id: test_func.c,v 1.4 2008/04/10 17:14:07 drh Exp $
** $Id: test_func.c,v 1.5 2008/04/15 12:14:22 drh Exp $
*/
#include "sqlite3.h"
#include "tcl.h"
@@ -204,6 +204,33 @@ static void test_error(
}
}
/*
** This function takes two arguments. It performance UTF-8/16 type
** conversions on the first argument then returns a copy of the second
** argument.
**
** This function is used in cases such as the following:
**
** SELECT test_isolation(x,x) FROM t1;
**
** We want to verify that the type conversions that occur on the
** first argument do not invalidate the second argument.
*/
static void test_isolation(
sqlite3_context *pCtx,
int nArg,
sqlite3_value **argv
){
#ifndef SQLITE_OMIT_UTF16
sqlite3_value_text16(argv[0]);
sqlite3_value_text(argv[0]);
sqlite3_value_text16(argv[0]);
sqlite3_value_text(argv[0]);
#endif
sqlite3_result_value(pCtx, argv[1]);
}
static int registerTestFunctions(sqlite3 *db){
static const struct {
char *zName;
@@ -218,6 +245,7 @@ static int registerTestFunctions(sqlite3 *db){
{ "test_auxdata", -1, SQLITE_UTF8, test_auxdata},
{ "test_error", 1, SQLITE_UTF8, test_error},
{ "test_error", 2, SQLITE_UTF8, test_error},
{ "test_isolation", 2, SQLITE_UTF8, test_isolation},
};
int i;
extern int Md5_Register(sqlite3*);