Move some mysql/mariadb utilities to maxutils

Can be used in system tests later on.

maxutils/maxsql/src/CMakeLists.txt

@@ -0,0 +1,7 @@
+add_library(maxsql STATIC
+  mariadb.cc
+  )
+
+target_link_libraries(maxsql maxbase ${MARIADB_CONNECTOR_LIBRARIES})
+set_target_properties(maxsql PROPERTIES VERSION "1.0.0" LINK_FLAGS -Wl,-z,defs)
+

maxutils/maxsql/src/mariadb.cc

@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2022-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+#include <maxsql/mariadb.hh>
+#include <time.h>
+#include <errmsg.h>
+#include <maxbase/assert.h>
+
+
+namespace
+{
+struct THIS_UNIT
+{
+    bool log_statements;    // Should all statements sent to server be logged?
+};
+
+static THIS_UNIT this_unit =
+{
+    false
+};
+}
+
+namespace maxsql
+{
+
+int mysql_query_ex(MYSQL* conn, const std::string& query, int query_retries, time_t query_retry_timeout)
+{
+    const char* query_cstr = query.c_str();
+    time_t start = time(NULL);
+    int rc = mysql_query(conn, query_cstr);
+
+    for (int n = 0; rc != 0 && n < query_retries && mysql_is_net_error(mysql_errno(conn))
+         && time(NULL) - start < query_retry_timeout; n++)
+    {
+        rc = mysql_query(conn, query_cstr);
+    }
+
+    if (this_unit.log_statements)
+    {
+        const char* host = "0.0.0.0";
+        unsigned int port = 0;
+        MXB_AT_DEBUG(int rc1 = ) mariadb_get_info(conn, MARIADB_CONNECTION_HOST, &host);
+        MXB_AT_DEBUG(int rc2 = ) mariadb_get_info(conn, MARIADB_CONNECTION_PORT, &port);
+        mxb_assert(!rc1 && !rc2);
+        MXB_NOTICE("SQL([%s]:%u): %d, \"%s\"", host, port, rc, query_cstr);
+    }
+
+    return rc;
+}
+
+bool mysql_is_net_error(unsigned int errcode)
+{
+    switch (errcode)
+    {
+    case CR_SOCKET_CREATE_ERROR:
+    case CR_CONNECTION_ERROR:
+    case CR_CONN_HOST_ERROR:
+    case CR_IPSOCK_ERROR:
+    case CR_SERVER_GONE_ERROR:
+    case CR_TCP_CONNECTION:
+    case CR_SERVER_LOST:
+        return true;
+
+    default:
+        return false;
+    }
+}
+
+void mysql_set_log_statements(bool enable)
+{
+    this_unit.log_statements = enable;
+}
+
+bool mysql_get_log_statements()
+{
+    return this_unit.log_statements;
+}
+}