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A fix and a test case for Bug#24179 "select b into $var" fails with

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--cursor_protocol": fix a misleading error message in case of
SELECT .. INTO.


sql/sql_class.cc:
  Implement select_result::check_simple_select hierarchy to 
  support correct error messages in case of SELECT .. INTO and C API 
  cursors.
sql/sql_class.h:
  Set the error message inside the function that checks for the error
  condition (simple_select, renamed to check_simple_select).
sql/sql_prepare.cc:
  Use a new method that now sets the error.
tests/mysql_client_test.c:
  Add a test case for Bug#24179 "select b into $var" fails with 
  --cursor_protocol" (check for the right error message and error code).
This commit is contained in:
unknown 2006-12-01 13:25:06 +03:00
parent 4ec847218d
commit fe84b016e1
4 changed files with 53 additions and 4 deletions
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14
sql/sql_class.cc
View File

@ -885,6 +885,13 @@ void select_result::cleanup()
/* do nothing */
}
bool select_result::check_simple_select() const
{
my_error(ER_SP_BAD_CURSOR_QUERY, MYF(0));
return TRUE;
}
static String default_line_term("\n",default_charset_info);
static String default_escaped("\\",default_charset_info);
static String default_field_term("\t",default_charset_info);
@ -1553,6 +1560,13 @@ int select_dumpvar::prepare(List<Item> &list, SELECT_LEX_UNIT *u)
}
bool select_dumpvar::check_simple_select() const
{
my_error(ER_SP_BAD_CURSOR_SELECT, MYF(0));
return TRUE;
}
void select_dumpvar::cleanup()
{
vars.empty();

12
sql/sql_class.h
View File

@ -1724,7 +1724,14 @@ public:
virtual bool initialize_tables (JOIN *join=0) { return 0; }
virtual void send_error(uint errcode,const char *err);
virtual bool send_eof()=0;
virtual bool simple_select() { return 0; }
/**
Check if this query returns a result set and therefore is allowed in
cursors and set an error message if it is not the case.
@retval FALSE success
@retval TRUE error, an error message is set
*/
virtual bool check_simple_select() const;
virtual void abort() {}
/*
Cleanup instance of this class for next execution of a prepared
@ -1762,7 +1769,7 @@ public:
bool send_fields(List<Item> &list, uint flags);
bool send_data(List<Item> &items);
bool send_eof();
bool simple_select() { return 1; }
virtual bool check_simple_select() const { return FALSE; }
void abort();
};
@ -2202,6 +2209,7 @@ public:
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_data(List<Item> &items);
bool send_eof();
virtual bool check_simple_select() const;
void cleanup();
};

3
sql/sql_prepare.cc
View File

@ -2906,10 +2906,9 @@ bool Prepared_statement::execute(String *expanded_query, bool open_cursor)
in INSERT ... SELECT and similar commands.
*/
if (open_cursor && lex->result && !lex->result->simple_select())
if (open_cursor && lex->result && lex->result->check_simple_select())
{
DBUG_PRINT("info",("Cursor asked for not SELECT stmt"));
my_error(ER_SP_BAD_CURSOR_QUERY, MYF(0));
return TRUE;
}

28
tests/mysql_client_test.c
View File

@ -15456,6 +15456,33 @@ static void test_bug21635()
DBUG_VOID_RETURN;
}
/*
Bug#24179 "select b into $var" fails with --cursor_protocol"
The failure is correct, check that the returned message is meaningful.
*/
static void test_bug24179()
{
int rc;
MYSQL_STMT *stmt;
DBUG_ENTER("test_bug24179");
myheader("test_bug24179");
stmt= open_cursor("select 1 into @a");
rc= mysql_stmt_execute(stmt);
DIE_UNLESS(rc);
if (!opt_silent)
{
printf("Got error (as expected): %d %s\n",
mysql_stmt_errno(stmt),
mysql_stmt_error(stmt));
}
DIE_UNLESS(mysql_stmt_errno(stmt) == 1323);
DBUG_VOID_RETURN;
}
/*
Read and parse arguments and MySQL options from my.cnf
@ -15735,6 +15762,7 @@ static struct my_tests_st my_tests[]= {
{ "test_bug21726", test_bug21726 },
{ "test_bug23383", test_bug23383 },
{ "test_bug21635", test_bug21635 },
{ "test_bug24179", test_bug24179 },
{ 0, 0 }
};