prereqColumn     117614 ext/sqlite3/libsqlite/sqlite3.c     Bitmask prereqColumn, prereqExpr;
prereqColumn     117619 ext/sqlite3/libsqlite/sqlite3.c     prereqColumn = exprTableUsage(pMaskSet, pLeft);
prereqColumn     117620 ext/sqlite3/libsqlite/sqlite3.c     if( (prereqExpr & prereqColumn)==0 ){