Extension:Cognate/cognate titles table

cgti_raw_key
Primary key.

Schema summary
CREATE TABLE IF NOT EXISTS /*_*/cognate_titles (	 cgti_raw VARBINARY(255) NOT NULL,	  cgti_raw_key BIGINT SIGNED NOT NULL PRIMARY KEY,	  cgti_normalized_key BIGINT SIGNED NOT NULL	  )/*$wgDBTableOptions*/;

(see source here).