Revert "SERVER-36385 Remove code and tests about index key limit size"

This reverts commit 7ef5348a2282a5442ec7dc50bb0b99c94b83396c.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mongo/db/catalog/index_consistency.h b/src/mongo/db/catalog/index_consistency.h
index e70c9a1a9ea..ea707d51679 100644
--- a/src/mongo/db/catalog/index_consistency.h
+++ b/src/mongo/db/catalog/index_consistency.h
@@ -60,6 +60,8 @@ struct IndexInfo {
     std::unique_ptr<KeyString> ks;
     // The number of index entries belonging to the index.
     int64_t numKeys = 0;
+    // The number of long keys that are not indexed for the index.
+    int64_t numLongKeys = 0;
     // The number of records that have a key in their document that referenced back to the this
     // index.
     int64_t numRecords = 0;
@@ -112,6 +114,13 @@ public:
     size_t getMultikeyMetadataPathCount(IndexInfo* indexInfo);
 
     /**
+     * Add one to the `_longKeys` count for the given `indexNs`.
+     * This is required because index keys > `KeyString::kMaxKeyBytes` are not indexed.
+     * TODO SERVER-36385: Completely remove the key size check in 4.4
+     */
+    void addLongIndexKey(IndexInfo* indexInfo);
+
+    /**
      * Returns true if any value in the `_indexKeyCount` map is not equal to 0, otherwise
      * return false.
      */