[SERVER-36278] Remove the 1KB index key size limit - MongoDB Jira

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Backwards Compatibility:
Fully Compatible
Sprint:
Storage NYC 2018-07-30, Storage NYC 2018-08-13, Storage NYC 2018-08-27
Linked BF Score:
0

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

SERVER-36228 Extend the size of TypeBits in KeyString

is depended on by

SERVER-36280 Create a new feature tracker bit indicating the existence of KeyString with long TypeBits

is documented by

DOCS-12032 Docs for SERVER-36278: Remove the 1KB index key size limit

is duplicated by

SERVER-3372 Allow indexing fields of arbitrary length

is related to

SERVER-36385 Completely remove code and tests about index key size limit

related to

SERVER-36476 Don't check index key size on the secondary

(1 related to)