ksql_trace —
enable SQLite logging
library “ksql”
#include
  <sys/types.h>
#include
  <stdint.h>
#include
  <ksql.h>
enum ksqlc
ksql_trace(
struct
  ksql *sql);
This function causes SQLite to emit error and debug messages. Messages are
  passed to the error message handler set during
  
ksql_alloc(3) or
  
ksql_alloc_child(3). It may be disabled with
  
ksql_untrace(3).
The 
ksql_trace() function may only be called
  prior to 
ksql_open(3).
This returns 
KSQL_ALREADYOPEN if invoked
  after 
ksql_open(3) or
  
KSQL_SYSTEM on system error. Otherwise, it
  returns 
KSQL_OK.
ksql_untrace(3)