code · pull · Aug 26, 2026 · Aug 26, 2026 · Aug 26, 2026 · Aug 26, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -3,6 +3,19 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+### Bug Fixes
+
+- **backend-native:** treat a client disconnect on /v1/cubesql as a graceful end ([#11649](https://github.com/cube-js/cube/issues/11649)) ([e803c6c](https://github.com/cube-js/cube/commit/e803c6cb58610c5da1a0710664a99d3047a6b3de))
+- **cubesql:** Prefer SQL pushdown over limitless post-processing ([#11559](https://github.com/cube-js/cube/issues/11559)) ([b022de1](https://github.com/cube-js/cube/commit/b022de166acefa29766c4760f81241e31cf9ac16))
+- **cubestore:** inline aggregate dropped rows past the first partition ([#11631](https://github.com/cube-js/cube/issues/11631)) ([6f3e66d](https://github.com/cube-js/cube/commit/6f3e66d4fcf89733a21d730d3e90fcb493a72dd0))
+- **schema-compiler:** a cube that extends another broke the parent's multi-stage measures ([#11641](https://github.com/cube-js/cube/issues/11641)) ([657f4e1](https://github.com/cube-js/cube/commit/657f4e18ae75c69dd4db4057e14867f8a7d91247))
+
+### Features
+
+- **cubesql:** Support `COPY ... FROM STDIN` ([#11538](https://github.com/cube-js/cube/issues/11538)) ([534f839](https://github.com/cube-js/cube/commit/534f8392830df33b7934129cbcbe068984e42903))
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 ### Bug Fixes

diff --git a/docs-mintlify/docs/pre-aggregations/cube-store-architecture.mdx b/docs-mintlify/docs/pre-aggregations/cube-store-architecture.mdx
@@ -996,6 +996,42 @@ Because detection is timestamp-based and cancellation is idempotent, it
 does not matter which instance notices first: recovery works even if the
 failed node never comes back.
 
+### Message size limits
+
+Cube talks to the cache and queue store over a WebSocket connection, and
+every cache entry, queue payload, and query result crosses it as one
+message. That transport has a hard ceiling:
+
+| Limit | Environment variable | Default | Allowed range |
+|---|---|---|---|
+| Transport message size | `CUBESTORE_TRANSPORT_MAX_MESSAGE_SIZE` | 64 MiB | 16 MiB — 256 MiB |
+| Transport frame size | `CUBESTORE_TRANSPORT_MAX_FRAME_SIZE` | 64 MiB | 4 MiB — 256 MiB |
+| Single cache entry | `CUBESTORE_CACHE_MAX_ENTRY_SIZE` | 63 MiB | up to transport message size − 1 MiB |
+
+Query results are the usual reason these limits are reached. A result is
+handed to the queue store so that every API instance waiting on that query
+can pick it up, and it is written to the cache under its cache key — so a
+result set larger than the transport limit cannot be delivered at all,
+however fast the query that produced it was.
+
+A cache entry at or above `CUBESTORE_CACHE_MAX_ENTRY_SIZE` is rejected explicitly,
+with `Unable to SET cache with '<key>' key, exceeds maximum allowed size for
+payload: <size>, max allowed: <limit>`.
+
+<Warning>
+
+**Known limitation.** A message above the *transport* limit is not answered
+with an error. The deployment then reports `ConnectionError: CubeStore connection error:
+write EPIPE`.
+
+</Warning>
+
+If a query hits this limit, reduce the size of its result set — add filters
+or a lower `limit`, drop dimensions, or split it into several queries.
+Self-hosted deployments can raise the ceiling instead, but
+`CUBESTORE_TRANSPORT_MAX_MESSAGE_SIZE` and `CUBESTORE_TRANSPORT_MAX_FRAME_SIZE`
+have to go up together, since a message is sent as a single frame.
+
 ### Why it lives in Cube Store
 
 Folding the cache and queue into Cube Store is itself a design decision in

diff --git a/docs-mintlify/reference/configuration/environment-variables.mdx b/docs-mintlify/reference/configuration/environment-variables.mdx
@@ -1870,6 +1870,18 @@ The address/port pair for Cube Store's MySQL-compatible interface.
 | ------------------------- | ---------------------- | --------------------- |
 | A valid address/port pair | `0.0.0.0:3306`         | `0.0.0.0:3306`        |
 
+## `CUBESTORE_CACHE_MAX_ENTRY_SIZE`
+
+The maximum size of a single entry in Cube Store's
+[cache store](/docs/pre-aggregations/cube-store-architecture#cache-and-queue-store).
+Larger entries are rejected. Cannot exceed
+[`CUBESTORE_TRANSPORT_MAX_MESSAGE_SIZE`](#cubestore_transport_max_message_size)
+minus 1 MiB.
+
+| Possible Values | Default in Development | Default in Production |
+| --------------- | ---------------------- | --------------------- |
+| A size, e.g. `63MiB` | `63MiB`           | `63MiB`               |
+
 ## `CUBESTORE_DATA_DIR`
 
 A path on the local filesystem to store a local replica of the data. Must be
@@ -2134,6 +2146,26 @@ If `true`, then sends telemetry to Cube.
 | --------------- | ---------------------- | --------------------- |
 | `true`, `false` | `true`                 | `true`                |
 
+## `CUBESTORE_TRANSPORT_MAX_MESSAGE_SIZE`
+
+The maximum size of a single message on the WebSocket connection between Cube
+and Cube Store. Messages above this size close the connection; see
+[message size limits](/docs/pre-aggregations/cube-store-architecture#message-size-limits).
+
+| Possible Values | Default in Development | Default in Production |
+| --------------- | ---------------------- | --------------------- |
+| A size from `16MiB` to `256MiB` | `64MiB` | `64MiB`     |
+
+## `CUBESTORE_TRANSPORT_MAX_FRAME_SIZE`
+
+The maximum size of a single WebSocket frame on the connection between Cube
+and Cube Store. A message is split into frames, so this can be smaller than
+[`CUBESTORE_TRANSPORT_MAX_MESSAGE_SIZE`](#cubestore_transport_max_message_size).
+
+| Possible Values | Default in Development | Default in Production |
+| --------------- | ---------------------- | --------------------- |
+| A size from `4MiB` to `256MiB` | `64MiB`  | `64MiB`              |
+
 ## `CUBESTORE_WAL_SPLIT_THRESHOLD`
 
 The maximum number of rows to keep in a single chunk of data right after

diff --git a/lerna.json b/lerna.json
@@ -1,5 +1,5 @@
 {
-  "version": "1.7.26",
+  "version": "1.7.27",
   "npmClient": "yarn",
   "command": {
     "bootstrap": {

diff --git a/packages/cubejs-api-gateway/CHANGELOG.md b/packages/cubejs-api-gateway/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+**Note:** Version bump only for package @cubejs-backend/api-gateway
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 **Note:** Version bump only for package @cubejs-backend/api-gateway

diff --git a/packages/cubejs-api-gateway/package.json b/packages/cubejs-api-gateway/package.json
@@ -2,7 +2,7 @@
   "name": "@cubejs-backend/api-gateway",
   "description": "Cube API Gateway",
   "author": "Cube Dev, Inc.",
-  "version": "1.7.26",
+  "version": "1.7.27",
   "repository": {
     "type": "git",
     "url": "https://github.com/cube-js/cube.git",
@@ -27,9 +27,9 @@
     "dist/src/*"
   ],
   "dependencies": {
-    "@cubejs-backend/native": "1.7.26",
-    "@cubejs-backend/query-orchestrator": "1.7.26",
-    "@cubejs-backend/shared": "1.7.26",
+    "@cubejs-backend/native": "1.7.27",
+    "@cubejs-backend/query-orchestrator": "1.7.27",
+    "@cubejs-backend/shared": "1.7.27",
     "@ungap/structured-clone": "^0.3.4",
     "assert-never": "^1.4.0",
     "body-parser": "^1.19.0",
@@ -53,7 +53,7 @@
     "zod": "^4.1.13"
   },
   "devDependencies": {
-    "@cubejs-backend/linter": "1.7.26",
+    "@cubejs-backend/linter": "1.7.27",
     "@types/express": "^4.17.21",
     "@types/jest": "^29",
     "@types/jsonwebtoken": "^9.0.2",

diff --git a/packages/cubejs-athena-driver/CHANGELOG.md b/packages/cubejs-athena-driver/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+**Note:** Version bump only for package @cubejs-backend/athena-driver
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 **Note:** Version bump only for package @cubejs-backend/athena-driver

diff --git a/packages/cubejs-athena-driver/package.json b/packages/cubejs-athena-driver/package.json
@@ -2,7 +2,7 @@
   "name": "@cubejs-backend/athena-driver",
   "description": "Cube.js Athena database driver",
   "author": "Cube Dev, Inc.",
-  "version": "1.7.26",
+  "version": "1.7.27",
   "repository": {
     "type": "git",
     "url": "https://github.com/cube-js/cube.git",
@@ -31,12 +31,12 @@
   "dependencies": {
     "@aws-sdk/client-athena": "^3.22.0",
     "@aws-sdk/credential-providers": "^3.22.0",
-    "@cubejs-backend/base-driver": "1.7.26",
-    "@cubejs-backend/shared": "1.7.26"
+    "@cubejs-backend/base-driver": "1.7.27",
+    "@cubejs-backend/shared": "1.7.27"
   },
   "devDependencies": {
-    "@cubejs-backend/linter": "1.7.26",
-    "@cubejs-backend/testing-shared": "1.7.26",
+    "@cubejs-backend/linter": "1.7.27",
+    "@cubejs-backend/testing-shared": "1.7.27",
     "@types/ramda": "^0.27.40",
     "typescript": "~5.2.2"
   },

diff --git a/packages/cubejs-backend-cloud/CHANGELOG.md b/packages/cubejs-backend-cloud/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+**Note:** Version bump only for package @cubejs-backend/cloud
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 **Note:** Version bump only for package @cubejs-backend/cloud

diff --git a/packages/cubejs-backend-cloud/package.json b/packages/cubejs-backend-cloud/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cubejs-backend/cloud",
-  "version": "1.7.26",
+  "version": "1.7.27",
   "description": "Cube Cloud package",
   "main": "dist/src/index.js",
   "typings": "dist/src/index.d.ts",
@@ -30,15 +30,15 @@
   "devDependencies": {
     "@babel/core": "^7.24.5",
     "@babel/preset-env": "^7.24.5",
-    "@cubejs-backend/linter": "1.7.26",
+    "@cubejs-backend/linter": "1.7.27",
     "@types/fs-extra": "^9.0.8",
     "@types/jest": "^29",
     "jest": "^29",
     "typescript": "~5.2.2"
   },
   "dependencies": {
     "@cubejs-backend/dotenv": "^9.0.2",
-    "@cubejs-backend/shared": "1.7.26",
+    "@cubejs-backend/shared": "1.7.27",
     "chokidar": "^3.5.1",
     "env-var": "^6.3.0",
     "form-data": "^4.0.0",

diff --git a/packages/cubejs-backend-maven/CHANGELOG.md b/packages/cubejs-backend-maven/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+**Note:** Version bump only for package @cubejs-backend/maven
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 **Note:** Version bump only for package @cubejs-backend/maven

diff --git a/packages/cubejs-backend-maven/package.json b/packages/cubejs-backend-maven/package.json
@@ -2,7 +2,7 @@
   "name": "@cubejs-backend/maven",
   "description": "Cube.js Maven Wrapper for java dependencies downloading",
   "author": "Cube Dev, Inc.",
-  "version": "1.7.26",
+  "version": "1.7.27",
   "license": "Apache-2.0",
   "repository": {
     "type": "git",
@@ -31,12 +31,12 @@
     "dist/src/*"
   ],
   "dependencies": {
-    "@cubejs-backend/shared": "1.7.26",
+    "@cubejs-backend/shared": "1.7.27",
     "source-map-support": "^0.5.19",
     "xmlbuilder2": "^2.4.0"
   },
   "devDependencies": {
-    "@cubejs-backend/linter": "1.7.26",
+    "@cubejs-backend/linter": "1.7.27",
     "@types/jest": "^29",
     "@types/node": "^22",
     "jest": "^29",

diff --git a/packages/cubejs-backend-native/CHANGELOG.md b/packages/cubejs-backend-native/CHANGELOG.md
@@ -3,6 +3,12 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+### Bug Fixes
+
+- **backend-native:** treat a client disconnect on /v1/cubesql as a graceful end ([#11649](https://github.com/cube-js/cube/issues/11649)) ([e803c6c](https://github.com/cube-js/cube/commit/e803c6cb58610c5da1a0710664a99d3047a6b3de))
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 **Note:** Version bump only for package @cubejs-backend/native

diff --git a/packages/cubejs-backend-native/package.json b/packages/cubejs-backend-native/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cubejs-backend/native",
-  "version": "1.7.26",
+  "version": "1.7.27",
   "author": "Cube Dev, Inc.",
   "description": "Native module for Cube.js (binding to Rust codebase)",
   "main": "dist/js/index.js",
@@ -39,7 +39,7 @@
     "dist/js"
   ],
   "devDependencies": {
-    "@cubejs-backend/linter": "1.7.26",
+    "@cubejs-backend/linter": "1.7.27",
     "@types/jest": "^29",
     "@types/node": "^22",
     "cargo-cp-artifact": "^0.1.9",
@@ -50,8 +50,8 @@
     "uuid": "^11.1.1"
   },
   "dependencies": {
-    "@cubejs-backend/cubesql": "1.7.26",
-    "@cubejs-backend/shared": "1.7.26",
+    "@cubejs-backend/cubesql": "1.7.27",
+    "@cubejs-backend/shared": "1.7.27",
     "@cubejs-infra/post-installer": "^0.1.2"
   },
   "resources": {

diff --git a/packages/cubejs-backend-shared/CHANGELOG.md b/packages/cubejs-backend-shared/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+**Note:** Version bump only for package @cubejs-backend/shared
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 ### Features

diff --git a/packages/cubejs-backend-shared/package.json b/packages/cubejs-backend-shared/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cubejs-backend/shared",
-  "version": "1.7.26",
+  "version": "1.7.27",
   "description": "Shared code for Cube.js backend packages",
   "main": "dist/src/index.js",
   "typings": "dist/src/index.d.ts",
@@ -27,7 +27,7 @@
   },
   "license": "Apache-2.0",
   "devDependencies": {
-    "@cubejs-backend/linter": "1.7.26",
+    "@cubejs-backend/linter": "1.7.27",
     "@types/bytes": "^3.1.5",
     "@types/cli-progress": "^3.9.1",
     "@types/jest": "^29",

diff --git a/packages/cubejs-base-driver/CHANGELOG.md b/packages/cubejs-base-driver/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+**Note:** Version bump only for package @cubejs-backend/base-driver
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 ### Features

diff --git a/packages/cubejs-base-driver/package.json b/packages/cubejs-base-driver/package.json
@@ -2,7 +2,7 @@
   "name": "@cubejs-backend/base-driver",
   "description": "Cube.js Base Driver",
   "author": "Cube Dev, Inc.",
-  "version": "1.7.26",
+  "version": "1.7.27",
   "repository": {
     "type": "git",
     "url": "https://github.com/cube-js/cube.git",
@@ -33,11 +33,11 @@
     "@aws-sdk/s3-request-presigner": "^3.49.0",
     "@azure/identity": "^4.4.1",
     "@azure/storage-blob": "^12.9.0",
-    "@cubejs-backend/shared": "1.7.26",
+    "@cubejs-backend/shared": "1.7.27",
     "@google-cloud/storage": "^7.13.0"
   },
   "devDependencies": {
-    "@cubejs-backend/linter": "1.7.26",
+    "@cubejs-backend/linter": "1.7.27",
     "@types/jest": "^29",
     "@types/node": "^22",
     "jest": "^29",

diff --git a/packages/cubejs-bigquery-driver/CHANGELOG.md b/packages/cubejs-bigquery-driver/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+## [1.7.27](https://github.com/cube-js/cube/compare/v1.7.26...v1.7.27) (2026-08-26)
+
+**Note:** Version bump only for package @cubejs-backend/bigquery-driver
+
 ## [1.7.26](https://github.com/cube-js/cube/compare/v1.7.25...v1.7.26) (2026-08-24)
 
 **Note:** Version bump only for package @cubejs-backend/bigquery-driver