Hi >> +#define PG_STAT_STATEMENTS_COLS_V1_4 25 > > I thought it was needed when adding new columns, isn't it ?
Yes, this is needed. I mean it should be PG_STAT_STATEMENTS_COLS_V1_8: because such change was made for 1.8 pg_stat_statements version. Same thing for other version-specific places. regards, Sergei