lidavidm commented on code in PR #4424:
URL: https://github.com/apache/arrow-adbc/pull/4424#discussion_r3463640476
##########
c/driver/postgresql/connection.cc:
##########
@@ -489,6 +489,26 @@ AdbcStatusCode PostgresConnection::Commit(struct
AdbcError* error) {
return ADBC_STATUS_OK;
}
+AdbcStatusCode PostgresConnection::EnsureTransaction(struct AdbcError* error) {
+ if (autocommit_) {
+ return ADBC_STATUS_OK;
+ }
+ auto txstatus = PQtransactionStatus(conn_);
+ if (txstatus == PQTRANS_ACTIVE || txstatus == PQTRANS_INTRANS) {
+ return ADBC_STATUS_OK;
+ }
+
+ PGresult* result = PQexec(conn_, "BEGIN TRANSACTION");
+ if (PQresultStatus(result) != PGRES_COMMAND_OK) {
+ InternalAdbcSetError(error, "%s%s",
+ "[libpq] Failed to begin transaction: ",
PQerrorMessage(conn_));
+ PQclear(result);
+ return ADBC_STATUS_IO;
+ }
+ PQclear(result);
+ return ADBC_STATUS_OK;
+}
Review Comment:
The others _are_ handled: we start the transaction in those cases!
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