Primary key.
cgsi_dbnameEdit
cgsi_interwikiEdit
Schema summaryEdit
CREATE TABLE IF NOT EXISTS /*_*/cognate_sites (
cgsi_key BIGINT SIGNED PRIMARY KEY NOT NULL,
cgsi_dbname VARBINARY(32) NOT NULL,
cgsi_interwiki VARBINARY(32) NOT NULL
)/*$wgDBTableOptions*/;
(see source here)