Show details Citus query plan instead of just 'Custom Scan'
Royston Shufflebotham
parent
91ad54d17b
commit
58b71804d8
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@ -41,10 +41,86 @@ const ImageMapper = {
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'image': 'ex_bmp_or.svg',
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'image_text': 'Bitmap OR',
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},
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'Citus Job': function(data) {
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// A 'Citus Job' represents a distributed query operation.
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// The details of the distributed operation are in the sub-plans,
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// but this node contains task count information, showing how many shards
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// the query is being distributed to.
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const taskCount = data['Task Count'];
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const tasksShown = data['Tasks Shown'];
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// "Task Count" is the number of shard operations being run.
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// "Tasks Shown" is either "All" or "One of N" depending on whether the returned query plan
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// contains one sample task or all of them.
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// We show single-shard or multi-shard with different images, and we show the
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// literal value of 'Tasks Shown' as the image text.
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const image = (taskCount === 1)
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? 'ex_citus_distributed_one_of_one.svg'
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: 'ex_citus_distributed_one_of_many.svg';
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return {
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'image': image,
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'image_text': tasksShown
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};
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},
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'Citus Task': function(data) {
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// A 'Citus Task' represents a Task executed on a particular worker node.
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// The details of the Task are in the sub-plans, so for this node we just show
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// some details of the worker node.
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const node = data['Node'];
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// "Node" has a value like "host=citus-worker-7 port=8394 dbname=postgres"
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// That's a bit long to display, so we shrink it to 'citus-worker-7:8394 postgres'
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const hostMatch = node.match(/host=(\S+)/);
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const portMatch = node.match(/port=(\S+)/);
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const dbnameMatch = node.match(/dbname=(\S+)/);
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const host = hostMatch ? hostMatch[1] : '';
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let port = portMatch ? portMatch[1] : '';
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if (port === '5432') {
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// Default port. Don't bother showing.
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port = '';
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}
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const dbname = dbnameMatch ? dbnameMatch[1] : '';
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let imageText = `Task ${host}`;
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if (port) {
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imageText += `:${port}`;
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}
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if (dbname) {
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imageText += ` ${dbname}`;
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}
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return {
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'image': 'ex_citus_worker_task.svg',
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'image_text': imageText
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};
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},
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'CTE Scan': {
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'image': 'ex_cte_scan.svg',
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'image_text': 'CTE Scan',
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},
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'Custom Scan': function(data) {
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const customPlanProvider = data['Custom Plan Provider'];
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let image;
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switch (customPlanProvider) {
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case 'Citus Adaptive':
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image = 'ex_citus.svg';
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break;
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default:
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image = 'ex_unknown.svg';
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break;
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}
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return {
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'image': image,
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'image_text': data['Custom Plan Provider']
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};
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},
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'Function Scan': {
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'image': 'ex_result.svg',
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'image_text': 'Function Scan',
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@ -350,6 +350,46 @@ function parsePlan(data, ctx) {
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}
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}
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const citusDistributedQuery = data['Distributed Query'];
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if (citusDistributedQuery) {
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// This is a Citus Distributed Query plan.
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// It contains a 'Job' with one or more 'Tasks' in it.
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// We'll convert those Tasks into sub-Plans of this main plan and process it
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// with the regular Plan layout code.
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delete data['Distributed Query'];
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// Convert the Job into a 'Citus Job' sub-plan.
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// That allows us to show details of the Task count etc.
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const citusJob = citusDistributedQuery['Job'];
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const jobPlan = {
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'Node Type': 'Citus Job',
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...citusJob
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};
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data['Plans'] = [jobPlan];
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// Convert each of the Tasks into 'Citus Task' sub-plans of the Job plan.
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const citusTasks = jobPlan['Tasks'];
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if (citusTasks) {
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delete jobPlan['Tasks'];
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const citusTaskPlans = citusTasks.map(citusJobTask => {
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const taskPlan = {
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'Node Type': 'Citus Task',
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...citusJobTask
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};
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// A Citus Task contains a 'Remote Plan' which is the actual plan
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// executed on the worker nodes. It's actually an array of arrays.
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const remotePlan = taskPlan['Remote Plan'];
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delete taskPlan['Remote Plan'];
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// A Remote Plan is an array of arrays of Plans.
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taskPlan['Plans'] = remotePlan.flatMap(arr => arr.map(planLevel1Entry => planLevel1Entry['Plan']));
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return taskPlan;
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});
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jobPlan['Plans'] = citusTaskPlans;
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}
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}
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// Start calculating xpos, ypos, width and height for child plans if any
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if ('Plans' in data) {
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data['width'] += offsetX;
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