将ODBC应用程序与JDBC驱动程序一起使用 [英] Using an ODBC application with a JDBC driver

问题描述

我的公司使用 Vertica .我们有使用pyodbc连接到它的Python应用程序.我的大部分开发工作都是在Mac(雪豹)上进行的，不幸的是Vertica尚未发布Mac的ODBC驱动程序.他们确实有JDBC驱动程序.我认为在Jython进行开发并不是妥协.有什么方法可以将JDBC驱动程序与ODBC应用程序一起使用?某种ODBC连接器?

My company uses Vertica. We have Python applications that connect to it with pyodbc. I do most of my development on a Mac (Snow Leopard) and unfortunately Vertica has not released ODBC drivers for Mac. They do have JDBC drivers though. I don't think developing in Jython is a good compromise. Is there any way to use JDBC drivers with an ODBC application? Some kind of ODBC connector?

推荐答案

vertica 5/6的更新可在此处找到

edit: update for vertica 5/6 can be found here https://github.com/serbaut/psycopg2

这是使psycopg2 2.2.1与vertica 4.0一起使用的修补程序.无需ODBC.

Here is a patch to make psycopg2 2.2.1 work with vertica 4.0. No ODBC needed.

diff --git a/psycopg/connection_int.c b/psycopg/connection_int.c
index 902fdbb..b07eee8 100644
--- a/psycopg/connection_int.c
+++ b/psycopg/connection_int.c
@@ -280,6 +280,10 @@ conn_setup(connectionObject *self, PGconn *pgconn)
         pgres = psyco_exec_green(self, psyco_datestyle);
     }

+    if (self->server_version == 0 && self->protocol == 3) { /* vertica */
+      self->encoding = strdup("UTF8");
+      self->isolation_level = 0;
+    } else {
     if (pgres == NULL || PQresultStatus(pgres) != PGRES_COMMAND_OK ) {
         PyErr_SetString(OperationalError, "can't set datestyle to ISO");
         IFCLEARPGRES(pgres);
@@ -335,7 +339,7 @@ conn_setup(connectionObject *self, PGconn *pgconn)
         return -1;
     }
     self->isolation_level = conn_get_isolation_level(pgres);
-
+    }
     Py_UNBLOCK_THREADS;
     pthread_mutex_unlock(&self->lock);
     Py_END_ALLOW_THREADS;
diff --git a/psycopg/typecast_builtins.c b/psycopg/typecast_builtins.c
index e8e5a1a..45b9dbc 100644
--- a/psycopg/typecast_builtins.c
+++ b/psycopg/typecast_builtins.c
@@ -1,15 +1,15 @@
 static long int typecast_NUMBER_types[] = {20, 23, 21, 701, 700, 1700, 0};
-static long int typecast_LONGINTEGER_types[] = {20, 0};
+static long int typecast_LONGINTEGER_types[] = {6, 20, 0};
 static long int typecast_INTEGER_types[] = {23, 21, 0};
-static long int typecast_FLOAT_types[] = {701, 700, 0};
-static long int typecast_DECIMAL_types[] = {1700, 0};
-static long int typecast_UNICODE_types[] = {19, 18, 25, 1042, 1043, 0};
+static long int typecast_FLOAT_types[] = {7, 701, 700, 0};
+static long int typecast_DECIMAL_types[] = {16, 1700, 0};
+static long int typecast_UNICODE_types[] = {8, 9, 19, 18, 25, 1042, 1043, 0};
 static long int typecast_STRING_types[] = {19, 18, 25, 1042, 1043, 0};
-static long int typecast_BOOLEAN_types[] = {16, 0};
-static long int typecast_DATETIME_types[] = {1114, 1184, 704, 1186, 0};
-static long int typecast_TIME_types[] = {1083, 1266, 0};
-static long int typecast_DATE_types[] = {1082, 0};
-static long int typecast_INTERVAL_types[] = {704, 1186, 0};
+static long int typecast_BOOLEAN_types[] = {5, 0};
+static long int typecast_DATETIME_types[] = {12, 13, 1114, 1184, 704, 1186, 0};
+static long int typecast_TIME_types[] = {11, 15, 1083, 1266, 0};
+static long int typecast_DATE_types[] = {10, 1082, 0};
+static long int typecast_INTERVAL_types[] = {14, 704, 1186, 0};
 static long int typecast_BINARY_types[] = {17, 0};
 static long int typecast_ROWID_types[] = {26, 0};
 static long int typecast_LONGINTEGERARRAY_types[] = {1016, 0};

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