SERVER-54604 Add support of $_testApiVersion expression in SBE

2 files changed, 3 insertions, 4 deletions

diff --git a/src/mongo/db/pipeline/expression_test_api_version.cpp b/src/mongo/db/pipeline/expression_test_api_version.cpp
index bd3f3c2e47e..7c77895bfff 100644
--- a/src/mongo/db/pipeline/expression_test_api_version.cpp
+++ b/src/mongo/db/pipeline/expression_test_api_version.cpp
@@ -38,9 +38,7 @@ REGISTER_TEST_EXPRESSION(_testApiVersion, ExpressionTestApiVersion::parse);
 ExpressionTestApiVersion::ExpressionTestApiVersion(ExpressionContext* const expCtx,
                                                    bool unstable,
                                                    bool deprecated)
-    : Expression(expCtx), _unstable(unstable), _deprecated(deprecated) {
-    expCtx->sbeCompatible = false;
-}
+    : Expression(expCtx), _unstable(unstable), _deprecated(deprecated) {}
 
 boost::intrusive_ptr<Expression> ExpressionTestApiVersion::parse(ExpressionContext* const expCtx,
                                                                  BSONElement expr,
diff --git a/src/mongo/db/query/sbe_stage_builder_expression.cpp b/src/mongo/db/query/sbe_stage_builder_expression.cpp
index a345e99d21f..820035e8450 100644
--- a/src/mongo/db/query/sbe_stage_builder_expression.cpp
+++ b/src/mongo/db/query/sbe_stage_builder_expression.cpp
@@ -2435,7 +2435,8 @@ public:
         visitConditionalExpression(expr);
     }
     void visit(ExpressionTestApiVersion* expr) final {
-        unsupportedExpression("$_testApiVersion");
+        _context->pushExpr(
+            makeConstant(sbe::value::TypeTags::NumberInt32, sbe::value::bitcastFrom<int32_t>(1)));
     }
     void visit(ExpressionToLower* expr) final {
         generateStringCaseConversionExpression(_context, "toLower");