Add missing cancel_transaction function

examples/cancel-transaction.jl

@@ -0,0 +1,39 @@
+# Copyright 2022 RelationalAI, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License
+
+# Fetch details for the given database.
+
+using RAI: Context, HTTPError, load_config, cancel_transaction
+
+include("parseargs.jl")
+
+function run(id; profile)
+    cfg = load_config(; profile = profile)
+    ctx = Context(cfg)
+    rsp = cancel_transaction(ctx, id)
+    println(rsp)
+end
+
+function main()
+    args = parseargs(
+        "id", Dict(:help => "transaction id", :required => true),
+        "--profile", Dict(:help => "config profile (default: default)"))
+    try
+        run(args.id; profile = args.profile)
+    catch e
+        e isa HTTPError ? show(e) : rethrow()
+    end
+end
+
+main()

src/api.jl

@@ -648,6 +648,11 @@ function get_transaction_results(ctx::Context, id::AbstractString; kw...)
     return _parse_multipart_results_response(rsp)
 end
 
+function cancel_transaction(ctx::Context, id::AbstractString; kw...)
+    path = PATH_ASYNC_TRANSACTIONS * "/$id/cancel"
+    return _post(ctx, path)
+end
+
 function _parse_multipart_fastpath_sync_response(msg)
     # TODO: in-place conversion to Arrow without copying the bytes.
     #   ... HTTP.parse_multipart_form() copies the bytes into IOBuffers.