1. add SQLDriverConnect to let ODBC-aware software to communicate with

   such as pyodbc
2. SQLDescribeCol
3. more DATA-TYPE-convertions in SQLGetData

src/CMakeLists.txt

@@ -21,5 +21,5 @@ ADD_SUBDIRECTORY(wal)
 ADD_SUBDIRECTORY(cq)
 ADD_SUBDIRECTORY(dnode)
 ADD_SUBDIRECTORY(connector/odbc)
-ADD_SUBDIRECTORY(connector/jdbc)
+# ADD_SUBDIRECTORY(connector/jdbc)
 

src/connector/odbc/tests/main.c

@@ -118,8 +118,7 @@ static int do_insert(SQLHSTMT stmt, data_t data) {
     if (r) break;
 
     fprintf(stderr, "bind 8 [%s]\n", statement);
-    SQLLEN l8 = SQL_NULL_DATA;
-    r = SQLBindParameter(stmt, 8, SQL_PARAM_INPUT, SQL_C_DOUBLE, SQL_DOUBLE, ignored, ignored, &data.f8, ignored, &l8);
+    r = SQLBindParameter(stmt, 8, SQL_PARAM_INPUT, SQL_C_DOUBLE, SQL_DOUBLE, ignored, ignored, &data.f8, ignored, NULL);
     CHK_RESULT(r, SQL_HANDLE_STMT, stmt);
     if (r) break;
 
@@ -196,6 +195,7 @@ int main(int argc, char *argv[]) {
             memset(data.blob, 0, sizeof(data.blob));
             snprintf(data.bin, sizeof(data.bin), "hello");
             snprintf(data.blob, sizeof(data.blob), "world");
+            snprintf(data.blob, sizeof(data.blob), "wo人rld");
             SQLHSTMT stmt = {0};
             r = SQLAllocHandle(SQL_HANDLE_STMT, conn, &stmt);
             if (r!=SQL_SUCCESS) break;

src/inc/taoserror.h

@@ -350,6 +350,12 @@ TAOS_DEFINE_ERROR(TSDB_CODE_HTTP_OP_TAG_VALUE_TOO_LONG,   0, 0x11A4, "tag value
 TAOS_DEFINE_ERROR(TSDB_CODE_HTTP_OP_VALUE_NULL,           0, 0x11A5, "value not find")
 TAOS_DEFINE_ERROR(TSDB_CODE_HTTP_OP_VALUE_TYPE,           0, 0x11A6, "value type should be boolean, number or string")
 
+
+TAOS_DEFINE_ERROR(TSDB_CODE_ODBC_OOM,                     0, 0x2101, "out of memory")
+TAOS_DEFINE_ERROR(TSDB_CODE_ODBC_CONV_UNDEF,              0, 0x2102, "convertion undefined")
+TAOS_DEFINE_ERROR(TSDB_CODE_ODBC_CONV_TRUNC,              0, 0x2103, "convertion truncated")
+TAOS_DEFINE_ERROR(TSDB_CODE_ODBC_CONV_NOT_SUPPORT,        0, 0x2104, "convertion not supported")
+
 #ifdef TAOS_ERROR_C
 };
 #endif