Hi,
Strange behavior for a simple query
SQL1: Scan table1 using index table1 (all rows)
SQL2: Scan table1 using index table1_test_index
I think that the same behavior in SA11.

Why SA16 not use index table1_test_index for SQL1?
(yes, I can fix it with index hints)

create test database:
------------------
"%SQLANY16%\bin32\dbinit" -i -s -p 4096 -z 1251CYR test.db
"%SQLANY16%\bin32\dbisql" -c "uid=dba;pwd=sql;dbf=test.db" reload.sql
------------------
reload.sql:
------------------
CREATE TABLE "DBA"."table1" (
  "ID"   INTEGER NOT NULL DEFAULT AUTOINCREMENT,
  "col1" INTEGER NOT NULL,
  "col2" INTEGER NULL,
  "col3" INTEGER NULL,
  "col4" INTEGER NULL,
  "col5" INTEGER NULL,
  "col6" NUMERIC(10,2) NULL,
  "col7" NUMERIC(10,2) NULL,
  "col8" NUMERIC(10,2) NULL,
  PRIMARY KEY ( "ID" ASC )
);

CREATE INDEX "table1_test_index" ON "DBA"."table1" ( "col1" ASC, "col2" ASC );

// loads 5 000 000 records
LOAD TABLE "DBA"."table1"  
  FROM '723.dat';
commit;
------------------

plan for SQL1:
------------------
select min(id) from table1 where col1=1 and col2=1

plan for SQL2:
------------------
select min(id) from table1 where col1=1 and col2=1
union all
select min(id) from table1 where col1=1 and col2=1