From 5dcaabd6cd0f02569cd99bf8c48bbc5f24c98b90 Mon Sep 17 00:00:00 2001
From: Daniel Harvey <danieljamesharvey@gmail.com>
Date: Fri, 20 Dec 2024 17:32:08 +0000
Subject: [PATCH] Remove unused constructors and packages (#46)

* Remove unused constructors and packages, add cargo machete job to CI

* Rebuild Cargo.lock
---
 .github/workflows/cargo-machete.yaml          |   28 +
 Cargo.lock                                    | 1034 +----------------
 architecture.md                               |  173 ---
 crates/cli/Cargo.toml                         |    7 +-
 crates/configuration/Cargo.toml               |   10 -
 crates/connectors/ndc-bigquery/Cargo.toml     |    9 -
 .../ndc-bigquery/src/error/convert.rs         |    9 -
 .../ndc-bigquery/src/error/record.rs          |    8 +-
 crates/connectors/ndc-bigquery/src/state.rs   |    2 -
 crates/query-engine/execution/Cargo.toml      |    5 -
 crates/query-engine/execution/src/error.rs    |   31 -
 crates/query-engine/execution/src/metrics.rs  |  112 +-
 crates/query-engine/metadata/Cargo.toml       |    2 -
 crates/query-engine/sql/Cargo.toml            |    2 -
 crates/query-engine/translation/Cargo.toml    |    3 +-
 crates/tests/tests-common/Cargo.toml          |   11 -
 16 files changed, 69 insertions(+), 1377 deletions(-)
 create mode 100644 .github/workflows/cargo-machete.yaml
 delete mode 100644 architecture.md

diff --git a/.github/workflows/cargo-machete.yaml b/.github/workflows/cargo-machete.yaml
new file mode 100644
index 00000000..c05dfa5e
--- /dev/null
+++ b/.github/workflows/cargo-machete.yaml
@@ -0,0 +1,28 @@
+name: find unused dependencies
+
+on:
+  push:
+
+jobs:
+  cargo-machete:
+    name: find unused dependencies with cargo machete
+    runs-on: ubuntu-latest
+    env:
+      CARGO_NET_GIT_FETCH_WITH_CLI: "true"
+      RUSTFLAGS: "-D warnings" # fail on warnings
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: install tools
+        run: |
+          rustup show
+          cargo install cargo-machete
+
+      - uses: Swatinem/rust-cache@v2
+        with:
+          shared-key: "build" # share the cache across jobs
+          save-if: false
+
+      - name: find unused dependencies
+        run: |
+          cargo machete --with-metadata
diff --git a/Cargo.lock b/Cargo.lock
index ba26e9fc..9b420921 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -17,20 +17,6 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
-[[package]]
-name = "ahash"
-version = "0.8.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
-dependencies = [
- "cfg-if",
- "getrandom",
- "once_cell",
- "serde",
- "version_check",
- "zerocopy",
-]
-
 [[package]]
 name = "aho-corasick"
 version = "1.0.4"
@@ -40,12 +26,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "allocator-api2"
-version = "0.2.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0942ffc6dcaadf03badf6e6a2d0228460359d5e34b57ccdc720b7382dfbd5ec5"
-
 [[package]]
 name = "android-tzdata"
 version = "0.1.1"
@@ -135,7 +115,7 @@ checksum = "16e62a023e7c117e27523144c5d2459f4397fcc3cab0085af8e2224f643a0193"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -146,16 +126,7 @@ checksum = "721cae7de5c34fbb2acd27e21e6d2cf7b886dce0c27388d46c4e6c47ea4318dd"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
-]
-
-[[package]]
-name = "atoi"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f28d99ec8bfea296261ca1af174f24225171fea9664ba9003cbebee704810528"
-dependencies = [
- "num-traits",
+ "syn",
 ]
 
 [[package]]
@@ -285,27 +256,6 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
-[[package]]
-name = "base64ct"
-version = "1.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c3c1a368f70d6cf7302d78f8f7093da241fb8e8807c05cc9e51a125895a6d5b"
-
-[[package]]
-name = "bit-set"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0700ddab506f33b20a03b13996eccd309a48e5ff77d0d95926aa0210fb4e95f1"
-dependencies = [
- "bit-vec",
-]
-
-[[package]]
-name = "bit-vec"
-version = "0.6.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
-
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -317,29 +267,6 @@ name = "bitflags"
 version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
-dependencies = [
- "serde",
-]
-
-[[package]]
-name = "block-buffer"
-version = "0.10.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
-dependencies = [
- "generic-array",
-]
-
-[[package]]
-name = "bstr"
-version = "0.2.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba3569f383e8f1598449f1a423e72e99569137b47740b1da11ef19af3d5c3223"
-dependencies = [
- "lazy_static",
- "memchr",
- "regex-automata 0.1.10",
-]
 
 [[package]]
 name = "build-data"
@@ -357,18 +284,6 @@ version = "3.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a3e2c3daef883ecc1b5d58c15adae93470a91d425f3532ba1695849656af3fc1"
 
-[[package]]
-name = "bytecount"
-version = "0.6.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ce89b21cab1437276d2650d57e971f9d548a2d9037cc231abdc0562b97498ce"
-
-[[package]]
-name = "byteorder"
-version = "1.4.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
-
 [[package]]
 name = "bytes"
 version = "1.9.0"
@@ -431,10 +346,10 @@ version = "4.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2bac35c6dafb060fd4d275d9a4ffae97917c13a6327903a8be2153cd964f7085"
 dependencies = [
- "heck 0.5.0",
+ "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -467,12 +382,6 @@ dependencies = [
  "windows-sys 0.45.0",
 ]
 
-[[package]]
-name = "const-oid"
-version = "0.9.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28c122c3980598d243d63d9a704629a2d748d101f278052ff068be5a4423ab6f"
-
 [[package]]
 name = "core-foundation"
 version = "0.9.3"
@@ -489,30 +398,6 @@ version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
 
-[[package]]
-name = "cpufeatures"
-version = "0.2.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a17b76ff3a4162b0b27f354a0c87015ddad39d35f9c0c36607a3bdd175dde1f1"
-dependencies = [
- "libc",
-]
-
-[[package]]
-name = "crc"
-version = "3.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86ec7a15cbe22e59248fc7eadb1907dab5ba09372595da4d73dd805ed4417dfe"
-dependencies = [
- "crc-catalog",
-]
-
-[[package]]
-name = "crc-catalog"
-version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cace84e55f07e7301bae1c519df89cdad8cc3cd868413d3fdbdeca9ff3db484"
-
 [[package]]
 name = "crc32fast"
 version = "1.4.2"
@@ -532,16 +417,6 @@ dependencies = [
  "crossbeam-utils",
 ]
 
-[[package]]
-name = "crossbeam-queue"
-version = "0.3.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1cfb3ea8a53f37c40dea2c7bedcbd88bdfae54f5e2175d6ecaff1c988353add"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
-]
-
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.16"
@@ -551,16 +426,6 @@ dependencies = [
  "cfg-if",
 ]
 
-[[package]]
-name = "crypto-common"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
-dependencies = [
- "generic-array",
- "typenum",
-]
-
 [[package]]
 name = "darling"
 version = "0.20.3"
@@ -582,7 +447,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim 0.10.0",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -593,18 +458,7 @@ checksum = "836a9bbc7ad63342d6d6e7b815ccab164bc77a2d95d84bc3117a8c0d5c98e2d5"
 dependencies = [
  "darling_core",
  "quote",
- "syn 2.0.69",
-]
-
-[[package]]
-name = "der"
-version = "0.7.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fffa369a668c8af7dbf8b5e56c9f744fbd399949ed171606040001947de40b1c"
-dependencies = [
- "const-oid",
- "pem-rfc7468",
- "zeroize",
+ "syn",
 ]
 
 [[package]]
@@ -616,24 +470,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "digest"
-version = "0.10.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
-dependencies = [
- "block-buffer",
- "const-oid",
- "crypto-common",
- "subtle",
-]
-
-[[package]]
-name = "dotenvy"
-version = "0.15.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1aaf95b3e5c8f23aa320147307562d361db0ae0d51242340f558153b4eb2439b"
-
 [[package]]
 name = "dyn-clone"
 version = "1.0.13"
@@ -645,9 +481,6 @@ name = "either"
 version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
-dependencies = [
- "serde",
-]
 
 [[package]]
 name = "encode_unicode"
@@ -681,7 +514,7 @@ checksum = "eecf8589574ce9b895052fa12d69af7a233f99e6107f5cb8dd1044f2a17bfdcb"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -734,39 +567,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "etcetera"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "136d1b5283a1ab77bd9257427ffd09d8667ced0570b6f938942bc7568ed5b943"
-dependencies = [
- "cfg-if",
- "home",
- "windows-sys 0.48.0",
-]
-
-[[package]]
-name = "event-listener"
-version = "2.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
-
-[[package]]
-name = "fallible-iterator"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
-
-[[package]]
-name = "fancy-regex"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b95f7c0680e4142284cf8b22c14a476e87d61b004a3a0861872b32ef7ead40a2"
-dependencies = [
- "bit-set",
- "regex",
-]
-
 [[package]]
 name = "fastrand"
 version = "2.0.0"
@@ -783,18 +583,6 @@ dependencies = [
  "miniz_oxide",
 ]
 
-[[package]]
-name = "flume"
-version = "0.10.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1657b4441c3403d9f7b3409e47575237dac27b1b5726df654a6ecbf92f0f7577"
-dependencies = [
- "futures-core",
- "futures-sink",
- "pin-project",
- "spin 0.9.8",
-]
-
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -825,16 +613,6 @@ dependencies = [
  "percent-encoding",
 ]
 
-[[package]]
-name = "fraction"
-version = "0.13.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3027ae1df8d41b4bed2241c8fdad4acc1e7af60c8e17743534b545e77182d678"
-dependencies = [
- "lazy_static",
- "num",
-]
-
 [[package]]
 name = "futures"
 version = "0.3.28"
@@ -877,17 +655,6 @@ dependencies = [
  "futures-util",
 ]
 
-[[package]]
-name = "futures-intrusive"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d930c203dd0b6ff06e0201a4a2fe9149b43c684fd4420555b26d21b1a02956f"
-dependencies = [
- "futures-core",
- "lock_api",
- "parking_lot",
-]
-
 [[package]]
 name = "futures-io"
 version = "0.3.28"
@@ -902,7 +669,7 @@ checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -958,16 +725,6 @@ dependencies = [
  "yup-oauth2",
 ]
 
-[[package]]
-name = "generic-array"
-version = "0.14.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
-dependencies = [
- "typenum",
- "version_check",
-]
-
 [[package]]
 name = "getrandom"
 version = "0.2.10"
@@ -975,10 +732,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "be4136b2a15dd319360be1c07d9933517ccf0be8f16bf62a3bee4f0d618df427"
 dependencies = [
  "cfg-if",
- "js-sys",
  "libc",
  "wasi",
- "wasm-bindgen",
 ]
 
 [[package]]
@@ -1023,28 +778,6 @@ name = "hashbrown"
 version = "0.14.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
-dependencies = [
- "ahash",
- "allocator-api2",
-]
-
-[[package]]
-name = "hashlink"
-version = "0.8.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e8094feaf31ff591f651a2664fb9cfd92bba7a60ce3197265e9482ebe753c8f7"
-dependencies = [
- "hashbrown 0.14.5",
-]
-
-[[package]]
-name = "heck"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
-dependencies = [
- "unicode-segmentation",
-]
 
 [[package]]
 name = "heck"
@@ -1058,33 +791,6 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
-[[package]]
-name = "hkdf"
-version = "0.12.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "791a029f6b9fc27657f6f188ec6e5e43f6911f6f878e0dc5501396e09809d437"
-dependencies = [
- "hmac",
-]
-
-[[package]]
-name = "hmac"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
-dependencies = [
- "digest",
-]
-
-[[package]]
-name = "home"
-version = "0.5.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5444c27eef6923071f7ebcc33e3444508466a76f7a2b93da00ed6e19f30c1ddb"
-dependencies = [
- "windows-sys 0.48.0",
-]
-
 [[package]]
 name = "http"
 version = "0.2.9"
@@ -1283,15 +989,6 @@ version = "1.70.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8478577c03552c21db0e2724ffb8986a5ce7af88107e6be5d2ee6e158c12800"
 
-[[package]]
-name = "iso8601"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "924e5d73ea28f59011fec52a0d12185d496a9b075d360657aed2a5707f701153"
-dependencies = [
- "nom",
-]
-
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -1316,44 +1013,11 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "jsonschema"
-version = "0.17.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a071f4f7efc9a9118dfb627a0a94ef247986e1ab8606a4c806ae2b3aa3b6978"
-dependencies = [
- "ahash",
- "anyhow",
- "base64 0.21.3",
- "bytecount",
- "clap",
- "fancy-regex",
- "fraction",
- "getrandom",
- "iso8601",
- "itoa",
- "memchr",
- "num-cmp",
- "once_cell",
- "parking_lot",
- "percent-encoding",
- "regex",
- "reqwest",
- "serde",
- "serde_json",
- "time",
- "url",
- "uuid",
-]
-
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-dependencies = [
- "spin 0.5.2",
-]
 
 [[package]]
 name = "libc"
@@ -1361,23 +1025,6 @@ version = "0.2.169"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
 
-[[package]]
-name = "libm"
-version = "0.2.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7012b1bbb0719e1097c47611d3898568c546d597c2e74d66f6087edd5233ff4"
-
-[[package]]
-name = "libsqlite3-sys"
-version = "0.26.0"
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- "vcpkg",
-]
-
 [[package]]
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@@ -1421,15 +1068,6 @@ version = "0.7.2"
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-
 [[package]]
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@@ -1511,14 +1149,11 @@ version = "1.0.0"
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- "axum-test-helper",
- "enum-iterator",
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@@ -1527,17 +1162,11 @@ dependencies = [
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  "reqwest",
- "schemars",
- "serde",
- "serde_derive",
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- "sqlx",
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  "tracing",
- "url",
  "yup-oauth2",
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@@ -1548,12 +1177,9 @@ dependencies = [
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- "serde_json",
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@@ -1563,21 +1189,14 @@ name = "ndc-bigquery-configuration"
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 dependencies = [
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- "sqlx",
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- "tracing",
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@@ -1669,93 +1288,6 @@ dependencies = [
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@@ -1763,7 +1295,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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 dependencies = [
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 ]
 
 [[package]]
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 dependencies = [
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- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
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@@ -2038,7 +1536,7 @@ checksum = "4359fd9c9171ec6e8c62926d6faaf553a8dc3f64e1507e76da7911b4f6a04405"
 dependencies = [
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+ "syn",
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- "md-5",
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-
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- "postgres-protocol",
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-
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@@ -2159,7 +1607,7 @@ dependencies = [
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  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -2174,25 +1622,19 @@ version = "1.0.0"
 dependencies = [
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- "ndc-models",
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- "sqlx",
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- "tracing",
 ]
 
 [[package]]
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 dependencies = [
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  "serde",
- "serde_json",
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 ]
 
@@ -2201,8 +1643,6 @@ name = "query-engine-sql"
 version = "1.0.0"
 dependencies = [
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- "schemars",
- "serde",
  "serde_json",
 ]
 
@@ -2225,7 +1665,6 @@ dependencies = [
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  "thiserror",
  "tokio",
- "tracing",
 ]
 
 [[package]]
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 dependencies = [
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  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -2383,7 +1822,7 @@ dependencies = [
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  "wasm-streams",
  "web-sys",
- "webpki-roots 0.25.2",
+ "webpki-roots",
  "winreg",
 ]
 
@@ -2411,32 +1850,10 @@ dependencies = [
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  "cfg-if",
  "getrandom",
- "libc",
- "spin 0.9.8",
- "untrusted 0.9.0",
- "windows-sys 0.52.0",
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-
-[[package]]
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- "num-traits",
- "pkcs1",
- "pkcs8",
- "rand_core",
- "signature",
- "spki",
- "subtle",
- "zeroize",
+ "libc",
+ "spin 0.9.8",
+ "untrusted 0.9.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -2647,7 +2064,7 @@ dependencies = [
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  "quote",
  "serde_derive_internals",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
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 dependencies = [
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- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
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 dependencies = [
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- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -2793,7 +2210,7 @@ dependencies = [
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  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -2809,28 +2226,6 @@ dependencies = [
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 ]
 
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@@ -2849,41 +2244,11 @@ dependencies = [
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- "atoi",
- "flume",
- "futures-channel",
- "futures-core",
- "futures-executor",
- "futures-intrusive",
- "futures-util",
- "libsqlite3-sys",
- "log",
- "percent-encoding",
- "serde",
- "sqlx-core",
- "tracing",
- "url",
- "uuid",
-]
-
-[[package]]
-name = "stringprep"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db3737bde7edce97102e0e2b15365bf7a20bfdb5f60f4f9e8d7004258a51a8da"
-dependencies = [
- "unicode-bidi",
- "unicode-normalization",
-]
-
 [[package]]
 name = "strsim"
 version = "0.10.0"
@@ -3184,17 +2324,6 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "81cdd64d312baedb58e21336b31bc043b77e01cc99033ce76ef539f78e965ebc"
 
-[[package]]
-name = "syn"
-version = "1.0.109"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
-dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
-]
-
 [[package]]
 name = "syn"
 version = "2.0.69"
@@ -3250,23 +2379,13 @@ dependencies = [
 name = "tests-common"
 version = "1.0.0"
 dependencies = [
- "anyhow",
  "axum",
  "axum-test-helper",
- "env_logger",
- "hyper",
- "ndc-bigquery",
  "ndc-sdk",
- "ndc-test",
- "reqwest",
  "serde",
  "serde_derive",
  "serde_json",
- "sqlx",
- "tokio",
- "tokio-postgres",
  "tracing",
- "uuid",
 ]
 
 [[package]]
@@ -3286,7 +2405,7 @@ checksum = "46c3384250002a6d5af4d114f2845d37b57521033f30d5c3f46c4d70e1197533"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -3380,7 +2499,7 @@ checksum = "693d596312e88961bc67d7f1f97af8a70227d9f90c31bba5806eec004978d752"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -3393,32 +2512,6 @@ dependencies = [
  "tokio",
 ]
 
-[[package]]
-name = "tokio-postgres"
-version = "0.7.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d340244b32d920260ae7448cb72b6e238bddc3d4f7603394e7dd46ed8e48f5b8"
-dependencies = [
- "async-trait",
- "byteorder",
- "bytes",
- "fallible-iterator",
- "futures-channel",
- "futures-util",
- "log",
- "parking_lot",
- "percent-encoding",
- "phf",
- "pin-project-lite",
- "postgres-protocol",
- "postgres-types",
- "rand",
- "socket2",
- "tokio",
- "tokio-util",
- "whoami",
-]
-
 [[package]]
 name = "tokio-rustls"
 version = "0.24.1"
@@ -3569,7 +2662,7 @@ checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
 [[package]]
@@ -3663,15 +2756,9 @@ checksum = "1f718dfaf347dcb5b983bfc87608144b0bad87970aebcbea5ce44d2a30c08e63"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
 ]
 
-[[package]]
-name = "typenum"
-version = "1.16.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "497961ef93d974e23eb6f433eb5fe1b7930b659f06d12dec6fc44a8f554c0bba"
-
 [[package]]
 name = "unicase"
 version = "2.7.0"
@@ -3702,12 +2789,6 @@ dependencies = [
  "tinyvec",
 ]
 
-[[package]]
-name = "unicode-segmentation"
-version = "1.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1dd624098567895118886609431a7c3b8f516e41d30e0643f03d94592a147e36"
-
 [[package]]
 name = "unicode_categories"
 version = "0.1.1"
@@ -3755,28 +2836,6 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
-[[package]]
-name = "uuid"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79daa5ed5740825c40b389c5e50312b9c86df53fccd33f281df655642b43869d"
-dependencies = [
- "getrandom",
- "rand",
- "uuid-macro-internal",
-]
-
-[[package]]
-name = "uuid-macro-internal"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7e1ba1f333bd65ce3c9f27de592fcbc256dafe3af2717f56d7c87761fbaccf4"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.69",
-]
-
 [[package]]
 name = "valuable"
 version = "0.1.0"
@@ -3831,7 +2890,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
  "wasm-bindgen-shared",
 ]
 
@@ -3865,7 +2924,7 @@ checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.69",
+ "syn",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -3909,31 +2968,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "webpki-roots"
-version = "0.24.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b291546d5d9d1eab74f069c77749f2cb8504a12caa20f0f2de93ddbf6f411888"
-dependencies = [
- "rustls-webpki 0.101.4",
-]
-
 [[package]]
 name = "webpki-roots"
 version = "0.25.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "14247bb57be4f377dfb94c72830b8ce8fc6beac03cf4bf7b9732eadd414123fc"
 
-[[package]]
-name = "whoami"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "22fc3756b8a9133049b26c7f61ab35416c130e8c09b660f5b3958b446f52cc50"
-dependencies = [
- "wasm-bindgen",
- "web-sys",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -4216,26 +3256,6 @@ dependencies = [
  "url",
 ]
 
-[[package]]
-name = "zerocopy"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
-dependencies = [
- "zerocopy-derive",
-]
-
-[[package]]
-name = "zerocopy-derive"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.69",
-]
-
 [[package]]
 name = "zeroize"
 version = "1.6.0"
diff --git a/architecture.md b/architecture.md
deleted file mode 100644
index 2aa9d5e9..00000000
--- a/architecture.md
+++ /dev/null
@@ -1,173 +0,0 @@
-# General architecture
-
-## Query Engine
-
-The query engine's job is to take a `QueryRequest`, which contains information about the query a user would like to run,
-translate it to PostgreSQL SQL, execute it against the database, and return the results as a `QueryResponse`.
-
-One place in particular that uses the Query Engine is the `/query` endpoint (defined in the `ndc-hub` repository).
-
-`/query` endpoints receives a `QueryRequest`, and calls the `translate` function from the Query Engine
-with it and with the information about the tables tracked in the metadata to receive and `ExecutionPlan`.
-It then calls the `execute` function from the Query Engine with the same `ExecutionPlan`
-(which then runs it against postgres) and gets back a `QueryResponse` which it can then return to the caller.
-
-API:
-
-```rs
-pub fn translate(
-    metadata: &metadata::Metadata,
-    query_request: models::QueryRequest,
-) -> Result<ExecutionPlan, Error>
-```
-
-```rs
-pub async fn execute(
-    pool: sqlx::PgPool,
-    plan: translation::ExecutionPlan,
-) -> Result<models::QueryResponse, sqlx::Error>
-```
-
-### Translation
-
-The translation step is essentially side-effect free - we use information from the request, as well as the information
-about the metadata to translate the query request into steps to run against the database.
-
-This process is currently found in the [translation/query/](/crates/query-engine/translation/src/translation/query/) directory
-and are split to several modules roughly mimicing the query parts as they are specified in the spec. The API
-is the following function in the [mod.rs](/crates/query-engine/translation/src/translation/query/mod.rs) file:
-
-```rs
-pub fn translate(
-    metadata: &metadata::Metadata,
-    query_request: models::QueryRequest,
-) -> Result<ExecutionPlan, Error>
-```
-
-The `translate` function returns a `ExecutionPlan`.
-
-```rs
-pub struct ExecutionPlan {
-    pub root_field: String,
-    /// Run before the query. Should be a sql::ast in the future.
-    pub pre: Vec<sql::string::DDL>,
-    /// The query.
-    pub query: sql::ast::Select,
-    /// Run after the query. Should be a sql::ast in the future.
-    pub post: Vec<sql::string::DDL>,
-}
-```
-
-Right now we don't expect `pre` and `post` to be populated, but it could be used for things like Stored Procedures.
-
-### SQL AST
-
-We maintain a SQL AST represented as Rust data types in [sql/ast.rs](/crates/query-engine/sql/src/sql/ast.rs).
-We implement our own representation because we want more control over this core component of our application,
-and we want to implement exactly what we want and not more or less. Other external libraries such as `sqlparser`
-do not have the same goals as us, and we'll have to make compromises that will affect our codebase's complexity
-and development velocity.
-
-We have a few guidelines for the SQL AST:
-
-#### The SQL AST should mimic PostgreSQL directly
-
-The SQL AST should look like a **subset** of PostgreSQL SQL, and not contain any high-level abstractions, or try to abstract
-multiple SQL ASTs. We should implement exactly what we need, and be precise about it.
-
-Should we need a higher-level of abstraction, and additional IR should be constructed that will sit before the SQL AST.
-
-#### Implement what you need and not more
-
-The SQL AST should contain structures we actively use, and not contain structures we don't use.
-
-One such example is window functions - we don't need to include them in the AST currently because we don't have features
-that use them from GraphQL.
-
-#### Use sql::helpers to build the AST
-
-Sometimes we'd like a shorthand to build specific repeating patterns,
-such as `SELECT coalesce(json_agg(row_to_json(<table_alias>)), '[]') AS <column_alias> FROM <query> as <table_alias>`.
-The [sql/helpers.rs](/crates/query-engine/sql/src/sql/helpers.rs) module can come in handy to help
-codify certain SQL AST generation patterns. If you end up meeting a repeating long pattern that is used in multiple places,
-it might be a good candidate to codify it as a `helpers` function.
-
-### SQL string
-
-The SQL string is a stringify representation of the SQL AST. It can be found in [sql/string.rs](/crates/query-engine/sql/src/sql/string.rs).
-
-We separate the SQL to AST and string representation so we can write transformations and optimizations on the SQL AST.
-
-The SQL string representation should be generated from the SQL AST by pretty printing the result.
-The result of converting ([sql/convert.rs](/crates/query-engine/sql/src/sql/convert.rs)) a sql ast to string should produce
-a query string that can be run against postgres as a parameterized query, as well as the parameters that are supplied by the user.
-
-Please use the API provided by the `SQL` type. It provides functions for constructing SQL strings in an easy way, such as appending syntax (like keywords and punctuation),
-identifiers, and params. Don't use `append_syntax` for things that are not syntax.
-
-### Query Execution
-
-The query execution receives a pool and a plan and executes it against postgres. It then returns the results from the query part
-back to the caller of the function.
-The code can be found in [execution.rs](/crates/query-engine/execution/src/execution.rs)
-
-```rs
-pub async fn execute(
-    pool: sqlx::PgPool,
-    plan: translation::ExecutionPlan,
-) -> Result<models::QueryResponse, sqlx::Error>
-```
-
-## Patterns and guiding principles
-
-Here are a few ideas we want to maintain and why:
-
-### Optimize for inspectability
-
-One of the most important tools we have to figure out how a program behaves is run it and examine
-the way data changes throughout the program. To do so we want to make sure the flow of the program
-is easy to follow, and we can examine the relevant data in any given point. Here are a few suggestions:
-
-1. Prefer functions over abstract trait methods - makes jump to definition easier.
-2. Annotate data types with `Debug` so that they can be traced, and prefer data shapes that can be `Debug`ged over those that can't.
-3. Prefer to encode information in a way that is inspectable at runtime.
-
-### Prefer flexibility over rigidness until knowing better
-
-Abstractions should come up from usage pain points rather than theoretical ideas.
-Often we don't know exactly what a good solution looks like in terms of code, and it is better to do a simple thing first and even
-duplicate code when in doubt.
-Abstracting or extracting duplicate code to a single place too early may lead to rigidness to a codebase before we understand the trade-offs,
-so if there's no real necessity (that arises from usage) it might not be worth to "fix" it.
-
-A possible rule of thumb is that creating an abstraction to build a new thing might raise an alarm bell,
-and building an abstraction in the middle of building yet another thing using the same pattern might be more appropriate.
-Though still, You Might Not Need It.
-
-### Simplify testing and avoid infrastructure code
-
-At this point in time we've settled on a fairly sweet spot for testing, where infrastructure code is very limited and contained in one place.
-Since testing can very easily become complex and "another project to maintain", we want to deliberately put limitations to how wildly it can grow,
-and contain all infrastructure code to a single module - `tests/common/mod.rs` (in each relevant crate), without infra code in tests.
-
-We do this so that we will notice when it grows too large and requires some explicit and calculated attention.
-
-We would also like, in general, to keep infrastructure code to the required minimum, and not add things we'll need to maintain before using them.
-
-### Consider the generated SQL
-
-When working on a feature or fixing a bug, consider the generated SQL first.
-What does it currently look like? What would you like it to look like?
-
-Compose a simplified yet runnable example and run it against the database (`just repl-postgres` can be helpful here),
-find a query that returns the results you expect, examine edge cases, and then consider the rust implementation of this idea.
-
-### General coding style ideas
-
-- Use meaningful names (not shorthands). No need to skimp on vowels.
-- Comment code with intention and reasons when those are not trivial. Comment modules, functions and types with a summary of what they are supposed to do.
-  Often writing summary comments helps us understand our code better and where it can be improved.
-- Avoid using dummy values. Prefer throwing an error when in doubt.
-- Prefer to avoid generics, traits and macros if possible. The majority of functions and types have a single usecase, and the ones that have multiple
-  use-cases probably don't have more than a handful of them. Duplicating code is often cheaper than the wrong abstraction, and we can always refactor.
-  Simple functions can go a long way.
diff --git a/crates/cli/Cargo.toml b/crates/cli/Cargo.toml
index d652979b..fe436f88 100644
--- a/crates/cli/Cargo.toml
+++ b/crates/cli/Cargo.toml
@@ -13,7 +13,6 @@ ndc-bigquery-configuration = { path = "../configuration" }
 anyhow = { workspace = true }
 clap = { workspace = true, features = ["derive", "env"] }
 serde = { workspace = true, features = ["derive"] }
-serde_json = { workspace = true }
 serde_yaml = { workspace = true }
 thiserror = { workspace = true }
 tokio = { workspace = true, features = ["full"] }
@@ -21,9 +20,5 @@ tokio = { workspace = true, features = ["full"] }
 [build-dependencies]
 build-data = { workspace = true }
 
-[dev-dependencies]
-insta = { workspace = true }
-tempfile = { workspace = true }
-
 [package.metadata.cargo-machete]
-ignored = ["build_data"] # apparently cargo-machete doesn't find dependencies used by build scripts
+ignored = ["build_data", "build-data"] # apparently cargo-machete doesn't find dependencies used by build scripts
diff --git a/crates/configuration/Cargo.toml b/crates/configuration/Cargo.toml
index 22169b0e..f4f0ecda 100644
--- a/crates/configuration/Cargo.toml
+++ b/crates/configuration/Cargo.toml
@@ -10,22 +10,12 @@ workspace = true
 [dependencies]
 ndc-models = { workspace = true }
 query-engine-metadata = { path = "../query-engine/metadata" }
-query-engine-sql = { path = "../query-engine/sql" }
 
 anyhow = { workspace = true }
-# We only use clap for the derive.
-clap = { workspace = true, features = ["derive", "env"] }
-prometheus = {workspace = true }
 schemars = { workspace = true, features = ["smol_str", "preserve_order"] }
 serde = { workspace = true }
 serde_json = { workspace = true, features = ["raw_value"] }
-smol_str = { workspace = true }
-sqlx = { workspace = true, features = ["json", "postgres", "runtime-tokio-rustls"] }
 thiserror = { workspace = true }
 tokio = { workspace = true, features = ["full"] }
-tracing = { workspace = true }
 yup-oauth2 = { workspace = true }
 gcp-bigquery-client = { workspace = true }
-
-[dev-dependencies]
-jsonschema = { workspace = true }
diff --git a/crates/connectors/ndc-bigquery/Cargo.toml b/crates/connectors/ndc-bigquery/Cargo.toml
index 8f970b30..08dd53c9 100644
--- a/crates/connectors/ndc-bigquery/Cargo.toml
+++ b/crates/connectors/ndc-bigquery/Cargo.toml
@@ -24,29 +24,20 @@ ndc-bigquery-configuration = { path = "../../configuration" }
 ndc-sdk = { workspace = true }
 
 async-trait = { workspace = true }
-enum-iterator = { workspace = true }
 gcp-bigquery-client = { workspace = true }
 prometheus = { workspace = true }
-schemars = { workspace = true, features = ["smol_str", "preserve_order"] }
-serde = { workspace = true }
-serde_derive = { workspace = true }
 serde_json = { workspace = true, features = ["raw_value"] }
-sqlx = { workspace = true, features = [ "json", "postgres", "runtime-tokio-rustls" ] }
 tokio = { workspace = true, features = ["full"] }
 tracing = { workspace = true }
 thiserror = { workspace = true }
 yup-oauth2 = { workspace = true }
 
 [dev-dependencies]
-ndc-models = { workspace = true }
 ndc-test = { workspace = true }
 tests-common = { path = "../../tests/tests-common" }
 
 axum = { workspace = true }
-axum-test-helper = { workspace = true }
 insta = { workspace = true, features = ["json"] }
 env_logger = { workspace = true }
 hyper = { workspace = true, features = ["tcp"] }
 reqwest = { workspace = true, features = ["rustls-tls"] }
-similar-asserts = { workspace = true }
-url = { workspace = true }
diff --git a/crates/connectors/ndc-bigquery/src/error/convert.rs b/crates/connectors/ndc-bigquery/src/error/convert.rs
index 223f7fba..44321c01 100644
--- a/crates/connectors/ndc-bigquery/src/error/convert.rs
+++ b/crates/connectors/ndc-bigquery/src/error/convert.rs
@@ -13,16 +13,7 @@ pub fn execution_error_to_response(error: query_engine_execution::error::Error)
             QueryError::NotSupported(_) => {
                 connector::QueryError::new_unsupported_operation(&query_error.to_string()).into()
             }
-            QueryError::DBError(_) => {
-                connector::QueryError::new_unprocessable_content(&query_error.to_string()).into()
-            }
-            QueryError::DBConstraintError(_) | QueryError::MutationConstraintFailed => {
-                connector::MutationError::new_constraint_not_met(&query_error.to_string()).into()
-            }
         },
-        Error::DB(_) => {
-            ErrorResponse::new_internal_with_details(serde_json::Value::String(error.to_string()))
-        }
     }
 }
 
diff --git a/crates/connectors/ndc-bigquery/src/error/record.rs b/crates/connectors/ndc-bigquery/src/error/record.rs
index 82294d6f..1f337e6f 100644
--- a/crates/connectors/ndc-bigquery/src/error/record.rs
+++ b/crates/connectors/ndc-bigquery/src/error/record.rs
@@ -8,19 +8,13 @@ pub fn execution_error(error: &query_engine_execution::error::Error, metrics: &m
     tracing::error!("{}", error);
     match error {
         Error::Query(err) => match &err {
-            QueryError::VariableNotFound(_)
-            | QueryError::DBError(_)
-            | QueryError::MutationConstraintFailed
-            | QueryError::DBConstraintError(_) => {
+            QueryError::VariableNotFound(_) => {
                 metrics.error_metrics.record_invalid_request();
             }
             QueryError::NotSupported(_) => {
                 metrics.error_metrics.record_unsupported_feature();
             }
         },
-        Error::DB(_) => {
-            metrics.error_metrics.record_database_error();
-        }
     }
 }
 
diff --git a/crates/connectors/ndc-bigquery/src/state.rs b/crates/connectors/ndc-bigquery/src/state.rs
index 5830b7b4..5f4446d5 100644
--- a/crates/connectors/ndc-bigquery/src/state.rs
+++ b/crates/connectors/ndc-bigquery/src/state.rs
@@ -53,8 +53,6 @@ pub async fn create_state(
 /// State initialization error.
 #[derive(Debug, Error)]
 pub enum InitializationError {
-    #[error("unable to initialize connection pool: {0}")]
-    UnableToCreatePool(sqlx::Error),
     #[error("error initializing metrics: {0}")]
     MetricsError(prometheus::Error),
 }
diff --git a/crates/query-engine/execution/Cargo.toml b/crates/query-engine/execution/Cargo.toml
index 2d825a91..31f7c94d 100644
--- a/crates/query-engine/execution/Cargo.toml
+++ b/crates/query-engine/execution/Cargo.toml
@@ -8,15 +8,10 @@ license.workspace = true
 workspace = true
 
 [dependencies]
-ndc-models = { workspace = true }
-
 query-engine-sql = { path = "../sql" }
 
 gcp-bigquery-client = { workspace = true }
 prometheus = { workspace = true }
 serde_json = { workspace = true }
-sqlformat = { workspace = true }
-sqlx = { workspace = true, features = [ "json", "postgres", "runtime-tokio-rustls", "uuid" ] }
 thiserror = { workspace = true }
-tracing = { workspace = true }
 bytes = { workspace = true }
diff --git a/crates/query-engine/execution/src/error.rs b/crates/query-engine/execution/src/error.rs
index a0c5e519..75f1f39c 100644
--- a/crates/query-engine/execution/src/error.rs
+++ b/crates/query-engine/execution/src/error.rs
@@ -3,8 +3,6 @@
 pub enum Error {
     #[error("{0}")]
     Query(QueryError),
-    #[error("{0}")]
-    DB(sqlx::Error),
 }
 
 /// Query planning error.
@@ -14,33 +12,4 @@ pub enum QueryError {
     VariableNotFound(String),
     #[error("{0} are not supported.")]
     NotSupported(String),
-    #[error("{0}")]
-    DBError(sqlx::Error),
-    #[error("{0}")]
-    DBConstraintError(sqlx::Error),
-    #[error("Mutation constraint failed.")]
-    MutationConstraintFailed,
-}
-
-impl From<sqlx::Error> for Error {
-    fn from(err: sqlx::Error) -> Error {
-        match err
-            .as_database_error()
-            .and_then(|e| e.try_downcast_ref())
-            .map(|e: &sqlx::postgres::PgDatabaseError| e.code())
-        {
-            None => Error::DB(err),
-            Some(code) => {
-                // We want to map data and constraint exceptions to query errors
-                // https://www.postgresql.org/docs/current/errcodes-appendix.html
-                if code.starts_with("22") {
-                    Error::Query(QueryError::DBError(err))
-                } else if code.starts_with("23") {
-                    Error::Query(QueryError::DBConstraintError(err))
-                } else {
-                    Error::DB(err)
-                }
-            }
-        }
-    }
 }
diff --git a/crates/query-engine/execution/src/metrics.rs b/crates/query-engine/execution/src/metrics.rs
index 0e388f39..8df01350 100644
--- a/crates/query-engine/execution/src/metrics.rs
+++ b/crates/query-engine/execution/src/metrics.rs
@@ -1,8 +1,6 @@
 //! Metrics setup and update for our connector.
 
-use std::time::Duration;
-
-use prometheus::{Gauge, Histogram, HistogramTimer, IntCounter, IntGauge, Registry};
+use prometheus::{Histogram, HistogramTimer, IntCounter, Registry};
 
 /// The collection of all metrics exposed through the `/metrics` endpoint.
 #[derive(Debug, Clone)]
@@ -11,11 +9,6 @@ pub struct Metrics {
     explain_total: IntCounter,
     query_plan_time: Histogram,
     query_execution_time: Histogram,
-    pool_max_connections: IntGauge,
-    pool_min_connections: IntGauge,
-    pool_acquire_timeout: Gauge,
-    pool_max_lifetime: Gauge,
-    pool_idle_timeout: Gauge,
     pub error_metrics: ErrorMetrics,
 }
 
@@ -24,58 +17,28 @@ impl Metrics {
     pub fn initialize(metrics_registry: &mut Registry) -> Result<Self, prometheus::Error> {
         let query_total = add_int_counter_metric(
             metrics_registry,
-            "postgres_ndc_query_total",
+            "bigquery_ndc_query_total",
             "Total successful queries.",
         )?;
 
         let explain_total = add_int_counter_metric(
             metrics_registry,
-            "postgres_ndc_explain_total",
+            "bigquery_ndc_explain_total",
             "Total successful explains.",
         )?;
 
         let query_plan_time = add_histogram_metric(
             metrics_registry,
-            "postgres_ndc_query_plan_time",
+            "bigquery_ndc_query_plan_time",
             "Time taken to plan a query for execution, in seconds.",
         )?;
 
         let query_execution_time = add_histogram_metric(
             metrics_registry,
-            "postgres_ndc_query_execution_time",
+            "bigquery_ndc_query_execution_time",
             "Time taken to execute an already-planned query, in seconds.",
         )?;
 
-        let pool_max_connections = add_int_gauge_metric(
-            metrics_registry,
-            "postgres_ndc_pool_max_connections",
-            "The maximum number of connections that this pool should maintain.",
-        )?;
-
-        let pool_min_connections = add_int_gauge_metric(
-            metrics_registry,
-            "postgres_ndc_pool_min_connections",
-            "The minimum number of connections that this pool should maintain.",
-        )?;
-
-        let pool_acquire_timeout = add_gauge_metric(
-            metrics_registry,
-            "postgres_ndc_pool_acquire_timeout",
-            "Get the maximum amount of time to spend waiting for a connection, in seconds.",
-        )?;
-
-        let pool_idle_timeout = add_gauge_metric(
-            metrics_registry,
-            "postgres_ndc_pool_idle_timeout",
-            "Get the maximum idle duration for individual connections, in seconds.",
-        )?;
-
-        let pool_max_lifetime = add_gauge_metric(
-            metrics_registry,
-            "postgres_ndc_pool_max_lifetime",
-            "Get the maximum lifetime of individual connections, in seconds.",
-        )?;
-
         let error_metrics = ErrorMetrics::initialize(metrics_registry)?;
 
         Ok(Self {
@@ -83,11 +46,6 @@ impl Metrics {
             explain_total,
             query_plan_time,
             query_execution_time,
-            pool_max_connections,
-            pool_min_connections,
-            pool_acquire_timeout,
-            pool_max_lifetime,
-            pool_idle_timeout,
             error_metrics,
         })
     }
@@ -107,34 +65,6 @@ impl Metrics {
     pub fn time_query_execution(&self) -> Timer {
         Timer(self.query_execution_time.start_timer())
     }
-
-    // Set the metrics populated from the pool options.
-    //
-    // This only needs to be called once, as the options don't change.
-    pub fn set_pool_options_metrics(&self, pool_options: &sqlx::pool::PoolOptions<sqlx::Postgres>) {
-        let max_connections: i64 = pool_options.get_max_connections().into();
-        self.pool_max_connections.set(max_connections);
-
-        let min_connections: i64 = pool_options.get_min_connections().into();
-        self.pool_min_connections.set(min_connections);
-
-        let acquire_timeout: f64 = pool_options.get_acquire_timeout().as_secs_f64();
-        self.pool_acquire_timeout.set(acquire_timeout);
-
-        // if nothing is set, return 0
-        let idle_timeout: f64 = pool_options
-            .get_idle_timeout()
-            .unwrap_or(Duration::ZERO)
-            .as_secs_f64();
-        self.pool_idle_timeout.set(idle_timeout);
-
-        // if nothing is set, return 0
-        let max_lifetime: f64 = pool_options
-            .get_max_lifetime()
-            .unwrap_or(Duration::ZERO)
-            .as_secs_f64();
-        self.pool_max_lifetime.set(max_lifetime);
-    }
 }
 
 /// Create a new int counter metric and register it with the provided Prometheus Registry
@@ -148,26 +78,6 @@ fn add_int_counter_metric(
     register_collector(metrics_registry, int_counter)
 }
 
-/// Create a new int gauge metric and register it with the provided Prometheus Registry
-fn add_int_gauge_metric(
-    metrics_registry: &mut Registry,
-    metric_name: &str,
-    metric_description: &str,
-) -> Result<IntGauge, prometheus::Error> {
-    let int_gauge = IntGauge::with_opts(prometheus::Opts::new(metric_name, metric_description))?;
-    register_collector(metrics_registry, int_gauge)
-}
-
-/// Create a new gauge metric and register it with the provided Prometheus Registry
-fn add_gauge_metric(
-    metrics_registry: &mut Registry,
-    metric_name: &str,
-    metric_description: &str,
-) -> Result<Gauge, prometheus::Error> {
-    let gauge = Gauge::with_opts(prometheus::Opts::new(metric_name, metric_description))?;
-    register_collector(metrics_registry, gauge)
-}
-
 /// Create a new histogram metric using the default buckets, and register it with the provided
 /// Prometheus Registry.
 fn add_histogram_metric(
@@ -249,37 +159,37 @@ impl ErrorMetrics {
     ) -> Result<Self, prometheus::Error> {
         let invalid_request_total = add_int_counter_metric(
             metrics_registry,
-            "ndc_postgres_error_invalid_request_total_count",
+            "ndc_bigquery_error_invalid_request_total_count",
             "Total number of invalid requests encountered.",
         )?;
 
         let unsupported_capability_total = add_int_counter_metric(
             metrics_registry,
-            "ndc_postgres_error_unsupported_capability_total_count",
+            "ndc_bigquery_error_unsupported_capability_total_count",
             "Total number of invalid requests with unsupported capabilities encountered.",
         )?;
 
         let unsupported_feature_total = add_int_counter_metric(
             metrics_registry,
-            "ndc_postgres_error_unsupported_capabilities_total_count",
+            "ndc_bigquery_error_unsupported_capabilities_total_count",
             "Total number of invalid requests with unsupported capabilities encountered.",
         )?;
 
         let connector_error_total = add_int_counter_metric(
             metrics_registry,
-            "ndc_postgres_error_connector_error_total_count",
+            "ndc_bigquery_error_connector_error_total_count",
             "Total number of requests failed due to an internal conenctor error.",
         )?;
 
         let database_error_total = add_int_counter_metric(
             metrics_registry,
-            "ndc_postgres_error_database_error_total_count",
+            "ndc_bigquery_error_database_error_total_count",
             "Total number of requests failed due to a database error.",
         )?;
 
         let connection_acquisition_error_total = add_int_counter_metric(
             metrics_registry,
-            "ndc_postgres_error_connection_acquisition_error_total_count",
+            "ndc_bigquery_error_connection_acquisition_error_total_count",
             "Total number of failures to acquire a database connection.",
         )?;
 
diff --git a/crates/query-engine/metadata/Cargo.toml b/crates/query-engine/metadata/Cargo.toml
index da4519b2..6cf6cf29 100644
--- a/crates/query-engine/metadata/Cargo.toml
+++ b/crates/query-engine/metadata/Cargo.toml
@@ -11,7 +11,5 @@ workspace = true
 
 ndc-models = { workspace = true }
 smol_str = { workspace = true }
-enum-iterator = { workspace = true }
 schemars = { workspace = true, features = ["smol_str"] }
 serde = { workspace = true, features = ["derive"] }
-serde_json = { workspace = true }
diff --git a/crates/query-engine/sql/Cargo.toml b/crates/query-engine/sql/Cargo.toml
index 7abc9e84..e539c8c9 100644
--- a/crates/query-engine/sql/Cargo.toml
+++ b/crates/query-engine/sql/Cargo.toml
@@ -10,6 +10,4 @@ workspace = true
 [dependencies]
 ndc-models = { workspace = true }
 
-schemars = { workspace = true, features = ["smol_str", "preserve_order"] }
-serde = { workspace = true }
 serde_json = { workspace = true }
diff --git a/crates/query-engine/translation/Cargo.toml b/crates/query-engine/translation/Cargo.toml
index 8f143a75..5c5e5e32 100644
--- a/crates/query-engine/translation/Cargo.toml
+++ b/crates/query-engine/translation/Cargo.toml
@@ -17,10 +17,9 @@ multimap = { workspace = true }
 ref-cast = { workspace = true }
 serde_json = { workspace = true }
 thiserror = { workspace = true }
-tracing = { workspace = true }
 anyhow = { workspace = true }
 tokio = { workspace = true }
 
 [dev-dependencies]
 insta = { workspace = true, features = ["json"] }
-sqlformat = { workspace = true }
\ No newline at end of file
+sqlformat = { workspace = true }
diff --git a/crates/tests/tests-common/Cargo.toml b/crates/tests/tests-common/Cargo.toml
index 7f478fe9..2fb34cb6 100644
--- a/crates/tests/tests-common/Cargo.toml
+++ b/crates/tests/tests-common/Cargo.toml
@@ -12,22 +12,11 @@ name = "tests_common"
 path = "src/lib.rs"
 
 [dependencies]
-ndc-bigquery = { path = "../../connectors/ndc-bigquery" }
-
 ndc-sdk = { workspace = true }
-ndc-test = { workspace = true }
 
-anyhow = { workspace = true }
 axum = { workspace = true }
 axum-test-helper = { workspace = true }
-env_logger = { workspace = true }
-hyper = { workspace = true, features = ["tcp"] }
-reqwest = { workspace = true }
 serde = { workspace = true }
 serde_json = { workspace = true, features = ["raw_value"] }
 serde_derive = { workspace = true }
-sqlx = { workspace = true, features = [ "json", "postgres", "runtime-tokio-rustls" ] }
-tokio = { workspace = true, features = ["full"] }
-tokio-postgres = { workspace = true }
 tracing = { workspace = true }
-uuid = { workspace = true, features = [ "v4", "fast-rng", "macro-diagnostics" ] }