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Change SELECT to not trigger "BEGIN" in not autocommit mode.

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This commit is contained in:
Hiroshi Inoue 2001-02-09 06:03:14 +00:00
parent dfbd5d6532
commit 5a03b0c393
1 changed files with 26 additions and 12 deletions
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38
src/interfaces/odbc/statement.c
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@ -746,16 +746,18 @@ QueryInfo qi;
conn = SC_get_conn(self);
/* Begin a transaction if one is not already in progress */
/* The reason is because we can't use declare/fetch cursors without
starting a transaction first.
A transaction should be begun if and only if
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 && self->statement_type == STMT_TYPE_SELECT) || ! CC_is_in_autocommit(conn))) {
/*
Basically we don't have to begin a transaction in
autocommit mode because Postgres backend runs in
autocomit mode.
We issue "BEGIN" in the following cases.
1) we use declare/fetch and the statement is SELECT
(because declare/fetch must be called in a transaction).
2) we are not in autocommit state and the statement
is of type UPDATE.
*/
if ( ! self->internal && ! CC_is_in_trans(conn) &&
((globals.use_declarefetch && self->statement_type == STMT_TYPE_SELECT) || (! CC_is_in_autocommit(conn) && STMT_UPDATE(self)))) {
mylog(" about to begin a transaction on statement = %u\n", self);
res = CC_send_query(conn, "BEGIN", NULL);
@ -802,7 +804,8 @@ QueryInfo qi;
/* send the declare/select */
self->result = CC_send_query(conn, self->stmt_with_params, NULL);
if (globals.use_declarefetch && self->result != NULL) {
if (globals.use_declarefetch && self->result != NULL &&
QR_command_successful(self->result)) {
QR_Destructor(self->result);
@ -834,6 +837,15 @@ QueryInfo qi;
/* We shouldn't send COMMIT. Postgres backend does the
autocommit if neccessary. (Zoltan, 04/26/2000)
*/
/* Even in case of autocommit, started transactions
must be committed. (Hiroshi, 09/02/2001)
*/
if ( ! self->internal && CC_is_in_autocommit(conn) && CC_is_in_trans(conn) && STMT_UPDATE(self)) {
res = CC_send_query(conn, "COMMIT", NULL);
QR_Destructor(res);
CC_set_no_trans(conn);
}
}
conn->status = oldstatus;
@ -867,7 +879,9 @@ QueryInfo qi;
return SQL_ERROR;
}
}
/* in autocommit mode declare/fetch error must be aborted */
if ( ! was_ok && ! self->internal && CC_is_in_autocommit(conn) && CC_is_in_trans(conn))
CC_abort(conn);
} else { /* Bad Error -- The error message will be in the Connection */
if (self->statement_type == STMT_TYPE_CREATE) {