Use the FCV mechanisms to guard the feature of unlimited index key. Things to remove include:
- The hardcoded size limits in the SortedDataInterface of each storage engine (wiredtiger_index.cpp, mobile_index.cpp, ephemeral_for_test_btree_impl.cpp)
- The hardcoded size limit for KeyString (key_string.h)
- The hardcoded size limit in index validations (record_store_validate_adaptor.cpp)
- depends on
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SERVER-36228 Extend the size of TypeBits in KeyString
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- Closed
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- is depended on by
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SERVER-36280 Create a new feature tracker bit indicating the existence of KeyString with long TypeBits
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- Closed
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- is duplicated by
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SERVER-3372 Allow indexing fields of arbitrary length
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- Closed
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- is related to
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SERVER-36385 Completely remove code and tests about index key size limit
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- Closed
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- related to
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SERVER-36476 Don't check index key size on the secondary
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- Closed
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