MXS-1779 Add maxctrl classify command

Using the REST-API /v1/maxscale/query_classifier/classify?sql=...
the provided statement is sent to MaxScale for classification.

maxctrl/lib/classify.js

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018 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.
+ */
+require('./common.js')()
+
+const classify_fields = [
+    {'Parse result': 'attributes.parameters.parse_result'},
+    {'Type mask': 'attributes.parameters.type_mask'},
+    {'Operation': 'attributes.parameters.operation'},
+    {'Has where clause': 'attributes.parameters.has_where_clause'},
+    {'Fields': 'attributes.parameters.fields'},
+    {'Functions': 'attributes.parameters.functions'}
+]
+
+exports.command = 'classify <statement>'
+exports.desc = 'Classify statement'
+exports.handler = function (argv) {
+    maxctrl(argv, function (host) {
+        return doRequest(host,
+                         'maxscale/query_classifier/classify?sql=' + argv.statement,
+                         (res) => {
+                             var a = res.data.attributes.parameters.functions.map((f) => {
+                                 return f.name + ': (' + f.arguments.join(', ') + ')'
+                             });
+
+                             res.data.attributes.parameters.functions = a;
+
+                             return formatResource(classify_fields, res.data)
+                         })
+    })
+}
+exports.builder = function(yargs) {
+    yargs
+        .usage('Usage: classify <statement>')
+        .help()
+        .command('*', 'the default command', {}, function(argv) {
+            console.log("*");
+            maxctrl(argv, function(host) {
+                console.log(argv.statement);
+                return error('Unknown command. See output of `help stop` for a list of commands.')
+            })
+        })
+}

maxctrl/lib/core.js

@@ -112,6 +112,7 @@ program
     .command(require('./call.js'))
     .command(require('./cluster.js'))
     .command(require('./api.js'))
+    .command(require('./classify.js'))
     .epilog('If no commands are given, maxctrl is started in interactive mode. ' +
             'Use `exit` to exit the interactive mode.')
     .help()