diff --git a/.github/workflows/native-vcpkg.yml b/.github/workflows/native-vcpkg.yml
index 42c7faadf4..2a99875594 100644
--- a/.github/workflows/native-vcpkg.yml
+++ b/.github/workflows/native-vcpkg.yml
@@ -67,6 +67,7 @@ jobs:
       VCPKG_DEFAULT_BINARY_CACHE: ${{ github.workspace }}/vcpkg-cache
       VCPKG_DEFAULT_TRIPLET: ${{ matrix.triplet }}
       VCPKG_ROOT: ${{ github.workspace }}/vcpkg
+      CTEST_CONFIGURATION_TYPE: ${{ matrix.config }}
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -123,6 +124,32 @@ jobs:
           BUILD_DRIVER_SQLITE: "1"
         run: .\ci\scripts\cpp_test.ps1 $pwd\build\${{ matrix.config }} $pwd\local\${{ matrix.config }}
 
+      - name: Start PostgreSQL
+        # For now, we only test on x64-windows. As of 2026-10-02, windows-latest
+        # ships with PostgreSQL but windows-11-arm does not. The code here is
+        # copied from java.yml just to be uniform.
+        if: matrix.arch == 'x64'
+        run: |
+          "root" | Set-Content "$env:RUNNER_TEMP\postgres_password"
+          & "$env:PGBIN\initdb.exe" `
+            --pgdata="$env:RUNNER_TEMP\pgdata" `
+            --username postgres `
+            --pwfile="$env:RUNNER_TEMP\postgres_password" `
+            --auth="scram-sha-256" `
+            --encoding="UTF-8" `
+            --locale="en_US.UTF-8" `
+            --no-instructions
+          if (-not $?) { throw "Failed to initialize PostgreSQL" }
+          & "$env:PGBIN\pg_ctl.exe" start --pgdata="$env:RUNNER_TEMP\pgdata"
+          if (-not $?) { throw "Failed to start PostgreSQL" }
+      - name: Test Driver PostgreSQL
+        if: matrix.arch == 'x64'
+        env:
+          BUILD_ALL: "0"
+          BUILD_DRIVER_POSTGRESQL: "1"
+          ADBC_POSTGRESQL_TEST_URI: "postgresql://postgres:root@localhost:5432/postgres"
+        run: .\ci\scripts\cpp_test.ps1 $pwd\build\${{ matrix.config }} $pwd\local\${{ matrix.config }}
+
       - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
         with:
           check-latest: true
diff --git a/.github/workflows/native-windows.yml b/.github/workflows/native-windows.yml
index 5c9ad07ffd..10e24abe1e 100644
--- a/.github/workflows/native-windows.yml
+++ b/.github/workflows/native-windows.yml
@@ -146,20 +146,12 @@ jobs:
           # Force bundled gtest
           mamba uninstall gtest
 
-      - name: Build Driver Manager
+      - name: Build Drivers
         env:
           BUILD_ALL: "0"
           BUILD_DRIVER_MANAGER: "1"
           BUILD_DRIVER_MANAGER_USER_CONFIG_TEST: "1"
-        run: .\ci\scripts\cpp_build.ps1 $pwd $pwd\build
-      - name: Build Driver PostgreSQL
-        env:
-          BUILD_ALL: "0"
           BUILD_DRIVER_POSTGRESQL: "1"
-        run: .\ci\scripts\cpp_build.ps1 $pwd $pwd\build
-      - name: Build Driver SQLite
-        env:
-          BUILD_ALL: "0"
           BUILD_DRIVER_SQLITE: "1"
         run: .\ci\scripts\cpp_build.ps1 $pwd $pwd\build
       - name: Test Driver Manager
@@ -173,6 +165,26 @@ jobs:
           BUILD_ALL: "0"
           BUILD_DRIVER_SQLITE: "1"
         run: .\ci\scripts\cpp_test.ps1 $pwd\build
+      - name: Start PostgreSQL
+        run: |
+          "root" | Set-Content "$env:RUNNER_TEMP\postgres_password"
+          & "$env:PGBIN\initdb.exe" `
+            --pgdata="$env:RUNNER_TEMP\pgdata" `
+            --username postgres `
+            --pwfile="$env:RUNNER_TEMP\postgres_password" `
+            --auth="scram-sha-256" `
+            --encoding="UTF-8" `
+            --locale="en_US.UTF-8" `
+            --no-instructions
+          if (-not $?) { throw "Failed to initialize PostgreSQL" }
+          & "$env:PGBIN\pg_ctl.exe" start --pgdata="$env:RUNNER_TEMP\pgdata"
+          if (-not $?) { throw "Failed to start PostgreSQL" }
+      - name: Test Driver PostgreSQL
+        env:
+          BUILD_ALL: "0"
+          BUILD_DRIVER_POSTGRESQL: "1"
+          ADBC_POSTGRESQL_TEST_URI: "postgresql://postgres:root@localhost:5432/postgres"
+        run: .\ci\scripts\cpp_test.ps1 $pwd\build
 
   # ------------------------------------------------------------
   # Go build
diff --git a/c/driver/postgresql/copy/writer.h b/c/driver/postgresql/copy/writer.h
index 4b38e710f7..eadbc528df 100644
--- a/c/driver/postgresql/copy/writer.h
+++ b/c/driver/postgresql/copy/writer.h
@@ -405,10 +405,9 @@ class PostgresCopyNumericFieldWriter : public PostgresCopyFieldWriter {
     int16_t dscale =
         static_cast<int16_t>((std::max)(0, parts.effective_scale - trailing_zeros));
 
-    // Optimize: remove trailing zero digit groups from fractional part
+    // Optimize: remove trailing zero digit groups
     int n_int_digit_groups = int_digits.size();
-    while (static_cast<int>(all_digits.size()) > n_int_digit_groups &&
-           all_digits.back() == 0) {
+    while (!all_digits.empty() && all_digits.back() == 0) {
       all_digits.pop_back();
     }
 
diff --git a/c/driver/postgresql/postgresql_test.cc b/c/driver/postgresql/postgresql_test.cc
index c157091b7c..2e10be9b69 100644
--- a/c/driver/postgresql/postgresql_test.cc
+++ b/c/driver/postgresql/postgresql_test.cc
@@ -396,7 +396,9 @@ TEST_F(PostgresConnectionTest, GetInfoMetadata) {
         }
         case ADBC_INFO_VENDOR_VERSION: {
           ArrowStringView val = ArrowArrayViewGetStringUnsafe(str_child, offset);
-#ifdef __WIN32
+// Fall back to a simpler version regex. This only really impacts WIN32/MSVC but
+// this is slightly more correct/portable.
+#if GTEST_USES_SIMPLE_RE
           const char* pater = "\\d\\d\\d\\d\\d\\d";
 #else
           const char* pater = "[0-9]{6}";
@@ -2947,49 +2949,49 @@ static std::initializer_list<TypeTestCase> kIntervalTypeCases = {
         "INTERVAL",
         "'P-1Y2M42DT1H1M1S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(-10, 42, (1L * 60 * 60 + 60L + 1L) * 1'000'000'000),
+        MonthDayNano(-10, 42, (1LL * 60 * 60 + 60LL + 1LL) * 1'000'000'000),
     },
     {
         "INTERVAL2",
         "INTERVAL",
         "'P0Y0M0DT0H0M0.1S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 100L * 1'000'000),
+        MonthDayNano(0, 0, 100LL * 1'000'000),
     },
     {
         "INTERVAL3",
         "INTERVAL",
         "'P0Y0M0DT0H0M0.01S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 10L * 1'000'000),
+        MonthDayNano(0, 0, 10LL * 1'000'000),
     },
     {
         "INTERVAL4",
         "INTERVAL",
         "'P0Y0M0DT0H0M0.001S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 1L * 1'000'000),
+        MonthDayNano(0, 0, 1LL * 1'000'000),
     },
     {
         "INTERVAL5",
         "INTERVAL",
         "'P0Y0M0DT0H0M0.0001S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 100'000L),
+        MonthDayNano(0, 0, 100'000LL),
     },
     {
         "INTERVAL6",
         "INTERVAL",
         "'P0Y0M0DT0H0M0.00001S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 10'000L),
+        MonthDayNano(0, 0, 10'000LL),
     },
     {
         "INTERVAL7",
         "INTERVAL",
         "'P0Y0M0DT0H0M0.000001S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 1'000L),
+        MonthDayNano(0, 0, 1'000LL),
     },
     {
         "INTERVAL_YEAR",
@@ -3017,21 +3019,21 @@ static std::initializer_list<TypeTestCase> kIntervalTypeCases = {
         "INTERVAL HOUR",
         "'12H'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 12L * 60 * 60 * 1'000'000'000),
+        MonthDayNano(0, 0, 12LL * 60 * 60 * 1'000'000'000),
     },
     {
         "INTERVAL_MINUTE",
         "INTERVAL MINUTE",
         "'P0Y0M0DT0H-5M0S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, -5L * 60 * 1'000'000'000),
+        MonthDayNano(0, 0, -5LL * 60 * 1'000'000'000),
     },
     {
         "INTERVAL_SECOND",
         "INTERVAL SECOND",
         "'P0Y0M0DT0H0M42S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 42L * 1'000'000'000),
+        MonthDayNano(0, 0, 42LL * 1'000'000'000),
     },
     {
         "INTERVAL_YEAR_TO_MONTH",
@@ -3045,42 +3047,42 @@ static std::initializer_list<TypeTestCase> kIntervalTypeCases = {
         "INTERVAL DAY TO HOUR",
         "'P0Y0M1DT-2H0M0S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 1, -2L * 60 * 60 * 1'000'000'000),
+        MonthDayNano(0, 1, -2LL * 60 * 60 * 1'000'000'000),
     },
     {
         "INTERVAL_DAY_TO_MINUTE",
         "INTERVAL DAY TO MINUTE",
         "'P0Y0M1DT-2H1M0S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 1, (-2L * 60 + 1L) * 60 * 1'000'000'000),
+        MonthDayNano(0, 1, (-2LL * 60 + 1LL) * 60 * 1'000'000'000),
     },
     {
         "INTERVAL_DAY_TO_SECOND",
         "INTERVAL DAY TO SECOND",
         "'P0Y0M1DT-2H1M-1S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 1, ((-2L * 60 + 1L) * 60 - 1L) * 1'000'000'000),
+        MonthDayNano(0, 1, ((-2LL * 60 + 1LL) * 60 - 1LL) * 1'000'000'000),
     },
     {
         "INTERVAL_HOUR_TO_MINUTE",
         "INTERVAL HOUR TO MINUTE",
         "'P0Y0M0DT-2H1M0S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, (-2L * 60 + 1L) * 60 * 1'000'000'000),
+        MonthDayNano(0, 0, (-2LL * 60 + 1LL) * 60 * 1'000'000'000),
     },
     {
         "INTERVAL_HOUR_TO_SECOND",
         "INTERVAL HOUR TO SECOND",
         "'P0Y0M0DT-2H1M-1S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, ((-2L * 60 + 1L) * 60 - 1L) * 1'000'000'000),
+        MonthDayNano(0, 0, ((-2LL * 60 + 1LL) * 60 - 1LL) * 1'000'000'000),
     },
     {
         "INTERVAL_MINUTE_TO_SECOND",
         "INTERVAL MINUTE TO SECOND",
         "'P0Y0M0DT0H1M-1S'",
         NANOARROW_TYPE_INTERVAL_MONTH_DAY_NANO,
-        MonthDayNano(0, 0, 59L * 1'000'000'000),
+        MonthDayNano(0, 0, 59LL * 1'000'000'000),
     },
 };
 static std::initializer_list<TypeTestCase> kTimeTypeCases = {