Question

Using C++ (Visual Studio) and sqlite. How do I bind a date to a parameter?

sqlite3_stmt *statement;

const char *sql = 
    "INSERT INTO employees "
        "(full_name,"
        "date_started)" 
    " VALUES "
        "(@full_name,"
        "@date_started)";

sqlite3_prepare_v2(database_, sql, -1, &statement, NULL);

int parameterIndex = sqlite3_bind_parameter_index(statement, "@full_name");
sqlite3_bind_text(statement, parameterIndex, "John Smith", -1, SQLITE_TRANSIENT);

parameterIndex = sqlite3_bind_parameter_index(statement, "@date_started");

// <??? what goes here ???>
// I want to include the local current time, so I want to know:
// 1. what's the best way to get local time in C++
// 2. and what goes here for the date binding

sqlite3_step(statement);

sqlite3_finalize(statement);

Note: I don’t want to set the current time using sql (e.g, CURRENT_TIMESTAMP, etc.)

Answer 1

Here’s what I figured out. It’s working but I’m open to better methods.

time_t rawtime;
struct tm *currentTime;
time ( &rawtime );
currentTime = localtime ( &rawtime );

const int TIME_STRING_LENGTH = 20;
char buffer [TIME_STRING_LENGTH];

// SQLite expected date string format is "YYYY-MM-DD HH:MM:SS" (there are others too)
strftime(buffer, TIME_STRING_LENGTH, "%Y-%m-%d %H:%M:%S", currentTime);
sqlite3_bind_text(statement, parameterIndex, buffer, -1, SQLITE_TRANSIENT);