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there is one problem with Zoltan patches commited into the tree:

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if we set autocommit off and issued COMMIT (or ROLLBACK) on a connection
new transaction is not started

Max Khon
This commit is contained in:
Bruce Momjian 2000-12-15 19:11:28 +00:00
parent 326fbd8837
commit 0cf37659c4
2 changed files with 5 additions and 26 deletions
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16
src/interfaces/odbc/options.c
View File

@ -314,32 +314,18 @@ int i;
case SQL_AUTOCOMMIT:
/* Since we are almost always in a transaction, this is now ok.
Even if we were, the logic will handle it by sending a commit
after the statement.
if (CC_is_in_trans(conn)) {
conn->errormsg = "Cannot switch commit mode while a transaction is in progres";
conn->errormsg = "Cannot switch commit mode while a transaction is in progress";
conn->errornumber = CONN_TRANSACT_IN_PROGRES;
CC_log_error(func, "", conn);
return SQL_ERROR;
}
*/
mylog("SQLSetConnectOption: AUTOCOMMIT: transact_status=%d, vparam=%d\n", conn->transact_status, vParam);
switch(vParam) {
case SQL_AUTOCOMMIT_OFF:
CC_set_autocommit_off(conn);
/* The following two lines are new.
With this modification the SELECT statements
are also included in the transactions.
Error handling should be written,
this is missing yet, see
SC_execute in statement.c for details. Zoltan
*/
CC_send_query(conn,"BEGIN",NULL);
CC_set_in_trans(conn);
break;
case SQL_AUTOCOMMIT_ON:

15
src/interfaces/odbc/statement.c
View File

@ -750,12 +750,12 @@ QueryInfo qi;
starting a transaction first.
A transaction should be begun if and only if
we use declare/fetch and the statement is SELECT.
we use declare/fetch and the statement is SELECT
or we are not in autocommit state
We assume that the Postgres backend has an autocommit
feature as default. (Zoltan Kovacs, 04/26/2000)
*/
// if ( ! self->internal && ! CC_is_in_trans(conn) && (globals.use_declarefetch || STMT_UPDATE(self))) {
if ( ! self->internal && ! CC_is_in_trans(conn) && globals.use_declarefetch && self->statement_type == STMT_TYPE_SELECT) {
if ( ! self->internal && ! CC_is_in_trans(conn) && ((globals.use_declarefetch && self->statement_type == STMT_TYPE_SELECT) || ! CC_is_in_autocommit(conn))) {
mylog(" about to begin a transaction on statement = %u\n", self);
res = CC_send_query(conn, "BEGIN", NULL);
@ -831,16 +831,9 @@ QueryInfo qi;
mylog(" it's NOT a select statement: stmt=%u\n", self);
self->result = CC_send_query(conn, self->stmt_with_params, NULL);
/* If we are in autocommit, we must send the commit. */
/* No, we shouldn't. Postgres backend does the
/* We shouldn't send COMMIT. Postgres backend does the
autocommit if neccessary. (Zoltan, 04/26/2000)
*/
/* if ( ! self->internal && CC_is_in_autocommit(conn) && STMT_UPDATE(self)) {
res = CC_send_query(conn, "COMMIT", NULL);
QR_Destructor(res);
CC_set_no_trans(conn);
}*/
}
conn->status = oldstatus;