From f41f4d1c8a7c2c776bfbbf0b2d0edbc413dd410f Mon Sep 17 00:00:00 2001
From: Gabriel Marks <gabriel.marks@mongodb.com>
Date: Mon, 30 Jun 2025 14:39:24 -0400
Subject: [PATCH] Revert "SERVER-65769 Enable featureFlagQETextSearchPreview
 (#37871)" (#37929)

GitOrigin-RevId: 5e1b2e62da39bfece38aea46c815fa0e4171d8e4
---
 buildscripts/resmokelib/core/programs.py  |  5 +++
 src/mongo/db/pipeline/expression_test.cpp | 44 +++++++++++++++++++++++
 src/mongo/db/server_feature_flags.idl     |  3 +-
 3 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/buildscripts/resmokelib/core/programs.py b/buildscripts/resmokelib/core/programs.py
index bc71f63565b..6674943f519 100644
--- a/buildscripts/resmokelib/core/programs.py
+++ b/buildscripts/resmokelib/core/programs.py
@@ -515,6 +515,11 @@ def mongo_shell_program(
         val = str(mongo_set_parameters[key])
         args.append(f"--setShellParameter={key}={val}")
 
+    # if featureFlagQETextSearchPreview is enabled in setParameter, enable it in the shell also
+    # TODO: SERVER-65769 remove once FF is enabled by default
+    if mongod_set_parameters.get("featureFlagQETextSearchPreview"):
+        args.append("--setShellParameter=featureFlagQETextSearchPreview=true")
+
     # Apply the rest of the command line arguments.
     _apply_kwargs(args, kwargs)
 
diff --git a/src/mongo/db/pipeline/expression_test.cpp b/src/mongo/db/pipeline/expression_test.cpp
index ee157cc5ad5..6110a729a4c 100644
--- a/src/mongo/db/pipeline/expression_test.cpp
+++ b/src/mongo/db/pipeline/expression_test.cpp
@@ -2120,6 +2120,17 @@ TEST(ExpressionFilterTest, CorrectRedactionWithLimit) {
         serialized);
 }
 
+// This test fails since featureFlagQETextSearchPreview is disabled by default.
+// TODO SERVER-65769: Remove when feature flag is enabled by default.
+TEST(ExpressionFLEStartsWithTest, FeatureFlagDisabled) {
+    auto expCtx = ExpressionContextForTest();
+    auto vps = expCtx.variablesParseState;
+    {
+        auto expr = fromjson("{$encStrStartsWith: 12}");
+        ASSERT_THROWS_CODE(Parse::Object::parseObject(expr), DBException, 168);
+    }
+}
+
 TEST(ExpressionFLEStartsWithTest, ParseAssertConstraints) {
     auto expCtx = ExpressionContextForTest();
     auto vps = expCtx.variablesParseState;
@@ -2270,6 +2281,17 @@ TEST(ExpressionFLEStartsWithTest, ParseBinDataPayloadRoundtrip) {
     ASSERT_BSONOBJ_EQ(value.getDocument().toBson(), roundTripExpr);
 }
 
+// This test fails since featureFlagQETextSearchPreview is disabled by default.
+// TODO SERVER-65769: Remove when feature flag is enabled by default.
+TEST(ExpressionFLEEndsWithTest, FeatureFlagDisabled) {
+    auto expCtx = ExpressionContextForTest();
+    auto vps = expCtx.variablesParseState;
+    {
+        auto expr = fromjson("{$encStrEndsWith: 12}");
+        ASSERT_THROWS_CODE(Parse::Object::parseObject(expr), DBException, 168);
+    }
+}
+
 TEST(ExpressionFLEEndsWithTest, ParseAssertConstraints) {
     auto expCtx = ExpressionContextForTest();
     auto vps = expCtx.variablesParseState;
@@ -2420,6 +2442,17 @@ TEST(ExpressionFLEEndsWithTest, ParseBinDataPayloadRoundtrip) {
     ASSERT_BSONOBJ_EQ(value.getDocument().toBson(), roundTripExpr);
 }
 
+// This test fails since featureFlagQETextSearchPreview is disabled by default.
+// TODO SERVER-65769: Remove when feature flag is enabled by default.
+TEST(ExpressionFLEStrContainsTest, FeatureFlagDisabled) {
+    auto expCtx = ExpressionContextForTest();
+    auto vps = expCtx.variablesParseState;
+    {
+        auto expr = fromjson("{$encStrContains: 12}");
+        ASSERT_THROWS_CODE(Parse::Object::parseObject(expr), DBException, 168);
+    }
+}
+
 TEST(ExpressionFLEStrContainsTest, ParseAssertConstraints) {
     auto expCtx = ExpressionContextForTest();
     auto vps = expCtx.variablesParseState;
@@ -2568,6 +2601,17 @@ TEST(ExpressionFLEStrContainsTest, ParseBinDataPayloadRoundtrip) {
     ASSERT_BSONOBJ_EQ(value.getDocument().toBson(), roundTripExpr);
 }
 
+// This test fails since featureFlagQETextSearchPreview is disabled by default.
+// TODO SERVER-65769: Remove when feature flag is enabled by default.
+TEST(ExpressionFLEStrNormalizedEqTest, FeatureFlagDisabled) {
+    auto expCtx = ExpressionContextForTest();
+    auto vps = expCtx.variablesParseState;
+    {
+        auto expr = fromjson("{$encStrNormalizedEq: 12}");
+        ASSERT_THROWS_CODE(Parse::Object::parseObject(expr), DBException, 168);
+    }
+}
+
 TEST(ExpressionFLEStrNormalizedEqTest, ParseAssertConstraints) {
     auto expCtx = ExpressionContextForTest();
     auto vps = expCtx.variablesParseState;
diff --git a/src/mongo/db/server_feature_flags.idl b/src/mongo/db/server_feature_flags.idl
index 6db6a0ded49..ee84a728d38 100644
--- a/src/mongo/db/server_feature_flags.idl
+++ b/src/mongo/db/server_feature_flags.idl
@@ -133,8 +133,7 @@ feature_flags:
     featureFlagQETextSearchPreview:
         description: "Queryable Encryption text search"
         cpp_varname: gFeatureFlagQETextSearchPreview
-        default: true
-        version: 8.2
+        default: false
         fcv_gated: true
     featureFlagExposeClientIpInAuditLogs:
         description: "Expose client IP in audit logs for load-balanced connections"