diff --git a/web-console/src/utils/druid-query.spec.ts b/web-console/src/utils/druid-query.spec.ts
index 2a6835da92d..d3b3a1321a3 100644
--- a/web-console/src/utils/druid-query.spec.ts
+++ b/web-console/src/utils/druid-query.spec.ts
@@ -18,13 +18,7 @@
 
 import { sane } from 'druid-query-toolkit/build/test-utils';
 
-import {
-  DruidError,
-  getDruidErrorMessage,
-  parseHtmlError,
-  parseQueryPlan,
-  trimSemicolon,
-} from './druid-query';
+import { DruidError, getDruidErrorMessage, parseHtmlError, trimSemicolon } from './druid-query';
 
 describe('DruidQuery', () => {
   describe('DruidError.parsePosition', () => {
@@ -227,10 +221,6 @@ describe('DruidQuery', () => {
     it('parseHtmlError', () => {
       expect(getDruidErrorMessage({})).toMatchInlineSnapshot(`undefined`);
     });
-
-    it('parseQueryPlan', () => {
-      expect(parseQueryPlan('start')).toMatchInlineSnapshot(`"start"`);
-    });
   });
 
   describe('.trimSemicolon', () => {
diff --git a/web-console/src/utils/druid-query.ts b/web-console/src/utils/druid-query.ts
index e3e958b0296..b9ac79390ce 100644
--- a/web-console/src/utils/druid-query.ts
+++ b/web-console/src/utils/druid-query.ts
@@ -17,6 +17,7 @@
  */
 
 import axios, { AxiosResponse } from 'axios';
+import { SqlRef } from 'druid-query-toolkit';
 
 import { Api } from '../singletons';
 
@@ -296,73 +297,15 @@ export async function queryDruidSql<T = any>(sqlQueryPayload: Record<string, any
   return sqlResultResp.data;
 }
 
-export interface BasicQueryExplanation {
+export interface QueryExplanation {
   query: any;
-  signature: string | null;
+  signature: { name: string; type: string }[];
 }
 
-export interface SemiJoinQueryExplanation {
-  mainQuery: BasicQueryExplanation;
-  subQueryRight: BasicQueryExplanation;
-}
-
-function parseQueryPlanResult(queryPlanResult: string): BasicQueryExplanation {
-  if (!queryPlanResult) {
-    return {
-      query: null,
-      signature: null,
-    };
-  }
-
-  const queryAndSignature = queryPlanResult.split(', signature=');
-  const queryValue = new RegExp(/query=(.+)/).exec(queryAndSignature[0]);
-  const signatureValue = queryAndSignature[1];
-
-  let parsedQuery: any;
-
-  if (queryValue && queryValue[1]) {
-    try {
-      parsedQuery = JSON.parse(queryValue[1]);
-    } catch (e) {}
-  }
-
-  return {
-    query: parsedQuery || queryPlanResult,
-    signature: signatureValue || null,
-  };
-}
-
-export function parseQueryPlan(
-  raw: string,
-): BasicQueryExplanation | SemiJoinQueryExplanation | string {
-  let plan: string = raw;
-  plan = plan.replace(/\n/g, '');
-
-  if (plan.includes('DruidOuterQueryRel(')) {
-    return plan; // don't know how to parse this
-  }
-
-  let queryArgs: string;
-  const queryRelFnStart = 'DruidQueryRel(';
-  const semiJoinFnStart = 'DruidSemiJoin(';
-
-  if (plan.startsWith(queryRelFnStart)) {
-    queryArgs = plan.substring(queryRelFnStart.length, plan.length - 1);
-  } else if (plan.startsWith(semiJoinFnStart)) {
-    queryArgs = plan.substring(semiJoinFnStart.length, plan.length - 1);
-    const leftExpressionsArgs = ', leftExpressions=';
-    const keysArgumentIdx = queryArgs.indexOf(leftExpressionsArgs);
-    if (keysArgumentIdx !== -1) {
-      return {
-        mainQuery: parseQueryPlanResult(queryArgs.substring(0, keysArgumentIdx)),
-        subQueryRight: parseQueryPlan(queryArgs.substring(queryArgs.indexOf(queryRelFnStart))),
-      } as SemiJoinQueryExplanation;
-    }
-  } else {
-    return plan;
-  }
-
-  return parseQueryPlanResult(queryArgs);
+export function formatSignature(queryExplanation: QueryExplanation): string {
+  return queryExplanation.signature
+    .map(({ name, type }) => `${SqlRef.column(name)}::${type}`)
+    .join(', ');
 }
 
 export function trimSemicolon(query: string): string {
diff --git a/web-console/src/views/query-view/explain-dialog/__snapshots__/explain-dialog.spec.tsx.snap b/web-console/src/views/query-view/explain-dialog/__snapshots__/explain-dialog.spec.tsx.snap
index ba424eb8d34..36df368d99e 100644
--- a/web-console/src/views/query-view/explain-dialog/__snapshots__/explain-dialog.spec.tsx.snap
+++ b/web-console/src/views/query-view/explain-dialog/__snapshots__/explain-dialog.spec.tsx.snap
@@ -86,7 +86,175 @@ exports[`ExplainDialog matches snapshot on loading 1`] = `
 </Blueprint3.Dialog>
 `;
 
-exports[`ExplainDialog matches snapshot on some data 1`] = `
+exports[`ExplainDialog matches snapshot on some data (many queries) 1`] = `
+<Blueprint3.Dialog
+  canOutsideClickClose={true}
+  className="explain-dialog"
+  isOpen={true}
+  onClose={[Function]}
+  title="Query plan"
+>
+  <div
+    className="bp3-dialog-body"
+  >
+    <Blueprint3.Tabs
+      animate={true}
+      large={false}
+      renderActiveTabPanelOnly={true}
+      vertical={true}
+    >
+      <Blueprint3.Tab
+        disabled={false}
+        id={0}
+        key="0"
+        panel={
+          <div
+            className="query-explanation"
+          >
+            <Blueprint3.FormGroup
+              className="query-group"
+              label="Query"
+            >
+              <Blueprint3.TextArea
+                readOnly={true}
+                value="{
+  \\"queryType\\": \\"scan\\",
+  \\"dataSource\\": {
+    \\"type\\": \\"table\\",
+    \\"name\\": \\"wikipedia\\"
+  },
+  \\"intervals\\": {
+    \\"type\\": \\"intervals\\",
+    \\"intervals\\": [
+      \\"-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z\\"
+    ]
+  },
+  \\"virtualColumns\\": [],
+  \\"resultFormat\\": \\"compactedList\\",
+  \\"batchSize\\": 20480,
+  \\"limit\\": 101,
+  \\"filter\\": null,
+  \\"columns\\": [
+    \\"channel\\"
+  ],
+  \\"legacy\\": false,
+  \\"context\\": {},
+  \\"descending\\": false,
+  \\"granularity\\": {
+    \\"type\\": \\"all\\"
+  }
+}"
+              />
+            </Blueprint3.FormGroup>
+            <Blueprint3.FormGroup
+              className="signature-group"
+              label="Signature"
+            >
+              <Blueprint3.InputGroup
+                defaultValue="channel::STRING"
+                readOnly={true}
+              />
+            </Blueprint3.FormGroup>
+            <Blueprint3.Button
+              className="open-query"
+              intent="primary"
+              minimal={true}
+              onClick={[Function]}
+              rightIcon="arrow-top-right"
+              text="Open query"
+            />
+          </div>
+        }
+        title="Query 1"
+      />
+      <Blueprint3.Tab
+        disabled={false}
+        id={1}
+        key="1"
+        panel={
+          <div
+            className="query-explanation"
+          >
+            <Blueprint3.FormGroup
+              className="query-group"
+              label="Query"
+            >
+              <Blueprint3.TextArea
+                readOnly={true}
+                value="{
+  \\"queryType\\": \\"scan\\",
+  \\"dataSource\\": {
+    \\"type\\": \\"table\\",
+    \\"name\\": \\"wikipedia\\"
+  },
+  \\"intervals\\": {
+    \\"type\\": \\"intervals\\",
+    \\"intervals\\": [
+      \\"-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z\\"
+    ]
+  },
+  \\"virtualColumns\\": [],
+  \\"resultFormat\\": \\"compactedList\\",
+  \\"batchSize\\": 20480,
+  \\"limit\\": 101,
+  \\"filter\\": {
+    \\"type\\": \\"selector\\",
+    \\"dimension\\": \\"channel\\",
+    \\"value\\": \\"#en.wikipedia\\",
+    \\"extractionFn\\": null
+  },
+  \\"columns\\": [
+    \\"channel\\"
+  ],
+  \\"legacy\\": false,
+  \\"context\\": {},
+  \\"descending\\": false,
+  \\"granularity\\": {
+    \\"type\\": \\"all\\"
+  }
+}"
+              />
+            </Blueprint3.FormGroup>
+            <Blueprint3.FormGroup
+              className="signature-group"
+              label="Signature"
+            >
+              <Blueprint3.InputGroup
+                defaultValue="channel::STRING"
+                readOnly={true}
+              />
+            </Blueprint3.FormGroup>
+            <Blueprint3.Button
+              className="open-query"
+              intent="primary"
+              minimal={true}
+              onClick={[Function]}
+              rightIcon="arrow-top-right"
+              text="Open query"
+            />
+          </div>
+        }
+        title="Query 2"
+      />
+      <Expander />
+    </Blueprint3.Tabs>
+  </div>
+  <div
+    className="bp3-dialog-footer"
+  >
+    <div
+      className="bp3-dialog-footer-actions"
+    >
+      <Blueprint3.Button
+        onClick={[Function]}
+        text="Close"
+      />
+    </div>
+  </div>
+</Blueprint3.Dialog>
+`;
+
+exports[`ExplainDialog matches snapshot on some data (one query) 1`] = `
 <Blueprint3.Dialog
   canOutsideClickClose={true}
   className="explain-dialog"
@@ -98,9 +266,10 @@ exports[`ExplainDialog matches snapshot on some data 1`] = `
     className="bp3-dialog-body"
   >
     <div
-      className="one-query"
+      className="query-explanation"
     >
       <Blueprint3.FormGroup
+        className="query-group"
         label="Query"
       >
         <Blueprint3.TextArea
@@ -108,19 +277,71 @@ exports[`ExplainDialog matches snapshot on some data 1`] = `
           value="{
   \\"queryType\\": \\"topN\\",
   \\"dataSource\\": {
-    \\"type\\": \\"table\\",
-    \\"name\\": \\"kttm-multi-day\\"
+    \\"type\\": \\"join\\",
+    \\"left\\": {
+      \\"type\\": \\"table\\",
+      \\"name\\": \\"wikipedia\\"
+    },
+    \\"right\\": {
+      \\"type\\": \\"query\\",
+      \\"query\\": {
+        \\"queryType\\": \\"groupBy\\",
+        \\"dataSource\\": {
+          \\"type\\": \\"table\\",
+          \\"name\\": \\"wikipedia\\"
+        },
+        \\"intervals\\": {
+          \\"type\\": \\"intervals\\",
+          \\"intervals\\": [
+            \\"-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z\\"
+          ]
+        },
+        \\"virtualColumns\\": [],
+        \\"filter\\": {
+          \\"type\\": \\"selector\\",
+          \\"dimension\\": \\"channel\\",
+          \\"value\\": \\"#en.wikipedia\\",
+          \\"extractionFn\\": null
+        },
+        \\"granularity\\": {
+          \\"type\\": \\"all\\"
+        },
+        \\"dimensions\\": [
+          {
+            \\"type\\": \\"default\\",
+            \\"dimension\\": \\"channel\\",
+            \\"outputName\\": \\"d0\\",
+            \\"outputType\\": \\"STRING\\"
+          }
+        ],
+        \\"aggregations\\": [],
+        \\"postAggregations\\": [],
+        \\"having\\": null,
+        \\"limitSpec\\": {
+          \\"type\\": \\"NoopLimitSpec\\"
+        },
+        \\"context\\": {},
+        \\"descending\\": false
+      }
+    },
+    \\"rightPrefix\\": \\"j0.\\",
+    \\"condition\\": \\"(\\\\\\"channel\\\\\\" == \\\\\\"j0.d0\\\\\\")\\",
+    \\"joinType\\": \\"LEFT\\",
+    \\"leftFilter\\": null
   },
   \\"virtualColumns\\": [],
   \\"dimension\\": {
     \\"type\\": \\"default\\",
-    \\"dimension\\": \\"browser\\",
+    \\"dimension\\": \\"channel\\",
     \\"outputName\\": \\"d0\\",
     \\"outputType\\": \\"STRING\\"
   },
   \\"metric\\": {
-    \\"type\\": \\"numeric\\",
-    \\"metric\\": \\"a0\\"
+    \\"type\\": \\"dimension\\",
+    \\"previousStop\\": null,
+    \\"ordering\\": {
+      \\"type\\": \\"lexicographic\\"
+    }
   },
   \\"threshold\\": 101,
   \\"intervals\\": {
@@ -140,22 +361,28 @@ exports[`ExplainDialog matches snapshot on some data 1`] = `
     }
   ],
   \\"postAggregations\\": [],
-  \\"context\\": {
-    \\"sqlOuterLimit\\": 101,
-    \\"sqlQueryId\\": \\"5905fe8d-9a91-41e0-8f3a-d7a8ac21dce6\\"
-  },
+  \\"context\\": {},
   \\"descending\\": false
 }"
         />
       </Blueprint3.FormGroup>
       <Blueprint3.FormGroup
+        className="signature-group"
         label="Signature"
       >
         <Blueprint3.InputGroup
-          defaultValue="[{d0:STRING, a0:LONG}]"
+          defaultValue="d0::STRING, a0::LONG"
           readOnly={true}
         />
       </Blueprint3.FormGroup>
+      <Blueprint3.Button
+        className="open-query"
+        intent="primary"
+        minimal={true}
+        onClick={[Function]}
+        rightIcon="arrow-top-right"
+        text="Open query"
+      />
     </div>
   </div>
   <div
@@ -168,11 +395,6 @@ exports[`ExplainDialog matches snapshot on some data 1`] = `
         onClick={[Function]}
         text="Close"
       />
-      <Blueprint3.Button
-        intent="primary"
-        onClick={[Function]}
-        text="Open query"
-      />
     </div>
   </div>
 </Blueprint3.Dialog>
diff --git a/web-console/src/views/query-view/explain-dialog/explain-dialog.scss b/web-console/src/views/query-view/explain-dialog/explain-dialog.scss
index de1a088d1cc..e447fdf6d85 100644
--- a/web-console/src/views/query-view/explain-dialog/explain-dialog.scss
+++ b/web-console/src/views/query-view/explain-dialog/explain-dialog.scss
@@ -18,30 +18,54 @@
 
 .explain-dialog {
   &.bp3-dialog {
-    width: 600px;
+    width: 800px;
+    height: 90vh;
   }
 
   .bp3-dialog-body {
-    min-height: 70vh;
-  }
-
-  textarea {
-    width: 100%;
-  }
-
-  .one-query {
-    textarea {
-      height: 50vh !important;
+    .bp3-tabs {
+      width: 100%;
+      height: 100%;
     }
-  }
 
-  .two-queries {
-    textarea {
-      height: 25vh !important;
+    .bp3-tab-panel {
+      flex: 1;
     }
-  }
 
-  .generic-result {
-    overflow: scroll;
+    .query-explanation {
+      position: relative;
+      display: flex;
+      flex-direction: column;
+      height: 100%;
+
+      textarea {
+        width: 100%;
+        height: 100%;
+        resize: none;
+      }
+
+      .query-group {
+        flex: 1;
+
+        .bp3-form-content {
+          flex: 1;
+        }
+      }
+
+      .signature-group {
+        margin-bottom: 0;
+      }
+
+      .open-query {
+        position: absolute;
+        top: 30px;
+        right: 6px;
+      }
+    }
+
+    .generic-result {
+      overflow: scroll;
+      white-space: pre-wrap;
+    }
   }
 }
diff --git a/web-console/src/views/query-view/explain-dialog/explain-dialog.spec.tsx b/web-console/src/views/query-view/explain-dialog/explain-dialog.spec.tsx
index 2109e5ed2a0..ab5f046c820 100644
--- a/web-console/src/views/query-view/explain-dialog/explain-dialog.spec.tsx
+++ b/web-console/src/views/query-view/explain-dialog/explain-dialog.spec.tsx
@@ -19,17 +19,11 @@
 import { shallow } from 'enzyme';
 import React from 'react';
 
-import {
-  BasicQueryExplanation,
-  parseQueryPlan,
-  QueryState,
-  SemiJoinQueryExplanation,
-} from '../../../utils';
+import { QueryExplanation, QueryState } from '../../../utils';
 
 import { ExplainDialog } from './explain-dialog';
 
-let explainState: QueryState<BasicQueryExplanation | SemiJoinQueryExplanation | string> =
-  QueryState.INIT;
+let explainState: QueryState<QueryExplanation[] | string> = QueryState.INIT;
 
 jest.mock('../../../hooks', () => {
   return {
@@ -64,11 +58,184 @@ describe('ExplainDialog', () => {
     expect(shallow(makeExplainDialog())).toMatchSnapshot();
   });
 
-  it('matches snapshot on some data', () => {
+  it('matches snapshot on some data (one query)', () => {
     explainState = new QueryState({
-      data: parseQueryPlan(
-        `DruidQueryRel(query=[{"queryType":"topN","dataSource":{"type":"table","name":"kttm-multi-day"},"virtualColumns":[],"dimension":{"type":"default","dimension":"browser","outputName":"d0","outputType":"STRING"},"metric":{"type":"numeric","metric":"a0"},"threshold":101,"intervals":{"type":"intervals","intervals":["-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z"]},"filter":null,"granularity":{"type":"all"},"aggregations":[{"type":"count","name":"a0"}],"postAggregations":[],"context":{"sqlOuterLimit":101,"sqlQueryId":"5905fe8d-9a91-41e0-8f3a-d7a8ac21dce6"},"descending":false}], signature=[{d0:STRING, a0:LONG}])`,
-      ),
+      data: [
+        {
+          query: {
+            queryType: 'topN',
+            dataSource: {
+              type: 'join',
+              left: {
+                type: 'table',
+                name: 'wikipedia',
+              },
+              right: {
+                type: 'query',
+                query: {
+                  queryType: 'groupBy',
+                  dataSource: {
+                    type: 'table',
+                    name: 'wikipedia',
+                  },
+                  intervals: {
+                    type: 'intervals',
+                    intervals: ['-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z'],
+                  },
+                  virtualColumns: [],
+                  filter: {
+                    type: 'selector',
+                    dimension: 'channel',
+                    value: '#en.wikipedia',
+                    extractionFn: null,
+                  },
+                  granularity: {
+                    type: 'all',
+                  },
+                  dimensions: [
+                    {
+                      type: 'default',
+                      dimension: 'channel',
+                      outputName: 'd0',
+                      outputType: 'STRING',
+                    },
+                  ],
+                  aggregations: [],
+                  postAggregations: [],
+                  having: null,
+                  limitSpec: {
+                    type: 'NoopLimitSpec',
+                  },
+                  context: {},
+                  descending: false,
+                },
+              },
+              rightPrefix: 'j0.',
+              condition: '("channel" == "j0.d0")',
+              joinType: 'LEFT',
+              leftFilter: null,
+            },
+            virtualColumns: [],
+            dimension: {
+              type: 'default',
+              dimension: 'channel',
+              outputName: 'd0',
+              outputType: 'STRING',
+            },
+            metric: {
+              type: 'dimension',
+              previousStop: null,
+              ordering: {
+                type: 'lexicographic',
+              },
+            },
+            threshold: 101,
+            intervals: {
+              type: 'intervals',
+              intervals: ['-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z'],
+            },
+            filter: null,
+            granularity: {
+              type: 'all',
+            },
+            aggregations: [
+              {
+                type: 'count',
+                name: 'a0',
+              },
+            ],
+            postAggregations: [],
+            context: {},
+            descending: false,
+          },
+          signature: [
+            {
+              name: 'd0',
+              type: 'STRING',
+            },
+            {
+              name: 'a0',
+              type: 'LONG',
+            },
+          ],
+        },
+      ],
+    });
+
+    expect(shallow(makeExplainDialog())).toMatchSnapshot();
+  });
+
+  it('matches snapshot on some data (many queries)', () => {
+    explainState = new QueryState({
+      data: [
+        {
+          query: {
+            queryType: 'scan',
+            dataSource: {
+              type: 'table',
+              name: 'wikipedia',
+            },
+            intervals: {
+              type: 'intervals',
+              intervals: ['-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z'],
+            },
+            virtualColumns: [],
+            resultFormat: 'compactedList',
+            batchSize: 20480,
+            limit: 101,
+            filter: null,
+            columns: ['channel'],
+            legacy: false,
+            context: {},
+            descending: false,
+            granularity: {
+              type: 'all',
+            },
+          },
+          signature: [
+            {
+              name: 'channel',
+              type: 'STRING',
+            },
+          ],
+        },
+        {
+          query: {
+            queryType: 'scan',
+            dataSource: {
+              type: 'table',
+              name: 'wikipedia',
+            },
+            intervals: {
+              type: 'intervals',
+              intervals: ['-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z'],
+            },
+            virtualColumns: [],
+            resultFormat: 'compactedList',
+            batchSize: 20480,
+            limit: 101,
+            filter: {
+              type: 'selector',
+              dimension: 'channel',
+              value: '#en.wikipedia',
+              extractionFn: null,
+            },
+            columns: ['channel'],
+            legacy: false,
+            context: {},
+            descending: false,
+            granularity: {
+              type: 'all',
+            },
+          },
+          signature: [
+            {
+              name: 'channel',
+              type: 'STRING',
+            },
+          ],
+        },
+      ],
     });
 
     expect(shallow(makeExplainDialog())).toMatchSnapshot();
diff --git a/web-console/src/views/query-view/explain-dialog/explain-dialog.tsx b/web-console/src/views/query-view/explain-dialog/explain-dialog.tsx
index db4713de784..d1b4301c644 100644
--- a/web-console/src/views/query-view/explain-dialog/explain-dialog.tsx
+++ b/web-console/src/views/query-view/explain-dialog/explain-dialog.tsx
@@ -23,20 +23,22 @@ import {
   FormGroup,
   InputGroup,
   Intent,
+  Tab,
+  Tabs,
   TextArea,
 } from '@blueprintjs/core';
+import { IconNames } from '@blueprintjs/icons';
 import * as JSONBig from 'json-bigint-native';
 import React from 'react';
 
 import { Loader } from '../../../components';
 import { useQueryManager } from '../../../hooks';
 import {
-  BasicQueryExplanation,
+  formatSignature,
   getDruidErrorMessage,
-  parseQueryPlan,
   queryDruidSql,
+  QueryExplanation,
   QueryWithContext,
-  SemiJoinQueryExplanation,
   trimSemicolon,
 } from '../../../utils';
 import { isEmptyContext } from '../../../utils/query-context';
@@ -63,16 +65,17 @@ export interface ExplainDialogProps {
 export const ExplainDialog = React.memo(function ExplainDialog(props: ExplainDialogProps) {
   const { queryWithContext, onClose, setQueryString, mandatoryQueryContext } = props;
 
-  const [explainState] = useQueryManager<
-    QueryWithContext,
-    BasicQueryExplanation | SemiJoinQueryExplanation | string
-  >({
+  const [explainState] = useQueryManager<QueryWithContext, QueryExplanation[] | string>({
     processQuery: async (queryWithContext: QueryWithContext) => {
       const { queryString, queryContext, wrapQueryLimit } = queryWithContext;
 
       let context: Record<string, any> | undefined;
       if (!isEmptyContext(queryContext) || wrapQueryLimit || mandatoryQueryContext) {
-        context = { ...queryContext, ...(mandatoryQueryContext || {}) };
+        context = {
+          ...queryContext,
+          ...(mandatoryQueryContext || {}),
+          useNativeQueryExplain: true,
+        };
         if (typeof wrapQueryLimit !== 'undefined') {
           context.sqlOuterLimit = wrapQueryLimit + 1;
         }
@@ -88,88 +91,73 @@ export const ExplainDialog = React.memo(function ExplainDialog(props: ExplainDia
         throw new Error(getDruidErrorMessage(e));
       }
 
-      return parseQueryPlan(result[0]['PLAN']);
+      const plan = result[0]['PLAN'];
+      if (typeof plan !== 'string') {
+        throw new Error(`unexpected result from server`);
+      }
+
+      try {
+        return JSONBig.parse(plan);
+      } catch {
+        return plan;
+      }
     },
     initQuery: queryWithContext,
   });
 
   let content: JSX.Element;
-  let queryString: string | undefined;
 
   const { loading, error: explainError, data: explainResult } = explainState;
+
+  function renderQueryExplanation(queryExplanation: QueryExplanation) {
+    const queryString = JSONBig.stringify(queryExplanation.query, undefined, 2);
+    return (
+      <div className="query-explanation">
+        <FormGroup className="query-group" label="Query">
+          <TextArea readOnly value={queryString} />
+        </FormGroup>
+        <FormGroup className="signature-group" label="Signature">
+          <InputGroup defaultValue={formatSignature(queryExplanation)} readOnly />
+        </FormGroup>
+        <Button
+          className="open-query"
+          text="Open query"
+          rightIcon={IconNames.ARROW_TOP_RIGHT}
+          intent={Intent.PRIMARY}
+          minimal
+          onClick={() => {
+            setQueryString(queryString);
+            onClose();
+          }}
+        />
+      </div>
+    );
+  }
+
   if (loading) {
     content = <Loader />;
   } else if (explainError) {
     content = <div>{explainError.message}</div>;
   } else if (!explainResult) {
     content = <div />;
-  } else if ((explainResult as BasicQueryExplanation).query) {
-    queryString = JSONBig.stringify(
-      (explainResult as BasicQueryExplanation).query[0],
-      undefined,
-      2,
-    );
-    content = (
-      <div className="one-query">
-        <FormGroup label="Query">
-          <TextArea readOnly value={queryString} />
-        </FormGroup>
-        {(explainResult as BasicQueryExplanation).signature && (
-          <FormGroup label="Signature">
-            <InputGroup
-              defaultValue={(explainResult as BasicQueryExplanation).signature || ''}
-              readOnly
+  } else if (Array.isArray(explainResult) && explainResult.length) {
+    if (explainResult.length === 1) {
+      content = renderQueryExplanation(explainResult[0]);
+    } else {
+      content = (
+        <Tabs animate renderActiveTabPanelOnly vertical>
+          {explainResult.map((queryExplanation, i) => (
+            <Tab
+              id={i}
+              key={i}
+              title={`Query ${i + 1}`}
+              panel={renderQueryExplanation(queryExplanation)}
             />
-          </FormGroup>
-        )}
-      </div>
-    );
-  } else if (
-    (explainResult as SemiJoinQueryExplanation).mainQuery &&
-    (explainResult as SemiJoinQueryExplanation).subQueryRight
-  ) {
-    content = (
-      <div className="two-queries">
-        <FormGroup label="Main query">
-          <TextArea
-            readOnly
-            value={JSONBig.stringify(
-              (explainResult as SemiJoinQueryExplanation).mainQuery.query,
-              undefined,
-              2,
-            )}
-          />
-        </FormGroup>
-        {(explainResult as SemiJoinQueryExplanation).mainQuery.signature && (
-          <FormGroup label="Signature">
-            <InputGroup
-              defaultValue={(explainResult as SemiJoinQueryExplanation).mainQuery.signature || ''}
-              readOnly
-            />
-          </FormGroup>
-        )}
-        <FormGroup label="Sub query">
-          <TextArea
-            readOnly
-            value={JSONBig.stringify(
-              (explainResult as SemiJoinQueryExplanation).subQueryRight.query,
-              undefined,
-              2,
-            )}
-          />
-        </FormGroup>
-        {(explainResult as SemiJoinQueryExplanation).subQueryRight.signature && (
-          <FormGroup label="Signature">
-            <InputGroup
-              defaultValue={
-                (explainResult as SemiJoinQueryExplanation).subQueryRight.signature || ''
-              }
-              readOnly
-            />
-          </FormGroup>
-        )}
-      </div>
-    );
+          ))}
+          <Tabs.Expander />
+        </Tabs>
+      );
+    }
   } else {
     content = <div className="generic-result">{explainResult}</div>;
   }
@@ -180,16 +168,6 @@ export const ExplainDialog = React.memo(function ExplainDialog(props: ExplainDia
       <div className={Classes.DIALOG_FOOTER}>
         <div className={Classes.DIALOG_FOOTER_ACTIONS}>
           <Button text="Close" onClick={onClose} />
-          {queryString && (
-            <Button
-              text="Open query"
-              intent={Intent.PRIMARY}
-              onClick={() => {
-                if (queryString) setQueryString(queryString);
-                onClose();
-              }}
-            />
-          )}
         </div>
       </div>
     </Dialog>