Batch Error on Integration w/ Directus.io

[ddcollins]

Describe the bug
Enabling batch for GraphQL Handler connection to Directus.io results in the error below.
The integration works disabling batch.

{
"GraphQLError: Cannot read property 'columns' of undefined",
        "    at Object.relocatedError (/Users/dustin/Projects/mesh-directus-replication/node_modules/@graphql-tools/utils/index.cjs.js:3894:12)",
        "    at mergeDataAndErrors (/Users/dustin/Projects/mesh-directus-replication/node_modules/@graphql-tools/delegate/index.cjs.js:1397:34)",
        "    at /Users/dustin/Projects/mesh-directus-replication/node_modules/@graphql-tools/delegate/index.cjs.js:1425:66",
        "    at Array.forEach (<anonymous>)",
        "    at mergeDataAndErrors (/Users/dustin/Projects/mesh-directus-replication/node_modules/@graphql-tools/delegate/index.cjs.js:1423:27)",
        "    at /Users/dustin/Projects/mesh-directus-replication/node_modules/@graphql-tools/delegate/index.cjs.js:1425:66",
        "    at Array.forEach (<anonymous>)",
        "    at mergeDataAndErrors (/Users/dustin/Projects/mesh-directus-replication/node_modules/@graphql-tools/delegate/index.cjs.js:1423:27)",
        "    at checkResultAndHandleErrors (/Users/dustin/Projects/mesh-directus-replication/node_modules/@graphql-tools/delegate/index.cjs.js:1386:38)",
        "    at CheckResultAndHandleErrors.transformResult (/Users/dustin/Projects/mesh-directus-replication/node_modules/@graphql-tools/delegate/index.cjs.js:1382:16)"

To Reproduce
Steps to reproduce the behavior:

This repo will get you set up: https://github.com/ddcollins/mesh-directus-replication

Just enable batch for the handler in the config.

The mesh config file also has commented out transforms that each result in an error when enabled.

Environment:

• OS: 10.15.7

"@graphql-mesh/cli": "0.19.2",
"@graphql-mesh/graphql": "^0.13.17",
"@graphql-mesh/json-schema": "^0.10.7",
"@graphql-mesh/transform-encapsulate": "^0.1.27",
"@graphql-mesh/transform-filter-schema": "^0.9.0",

[ardatan]

Cannot read property 'columns' of undefined
That errors seems to be coming from the remote API. Batching basically creates operations with multiple fields with aliases in the boundaries of the GraphQL Spec.
You can disable it with batch: false flag. Also you can learn more its algorithm;
https://www.graphql-tools.com/docs/batch-execution