Function init_executor_methods

cpp/deeplake_pg/deeplake_executor.cpp:172–207

static CustomExecMethods count_executor_exec_methods;

static void init_executor_methods()
{
    static bool inited = false;
    if (inited) {
        return;
    }
    inited = true;

    // Initialize deeplake executor scan methods
    memset(&deeplake_executor_scan_methods, 0, sizeof(deeplake_executor_scan_methods));
    deeplake_executor_scan_methods.CustomName = "DeeplakeExecutor";
    deeplake_executor_scan_methods.CreateCustomScanState = deeplake_executor_create_scan_state;

    // Initialize deeplake executor exec methods
    memset(&deeplake_executor_exec_methods, 0, sizeof(deeplake_executor_exec_methods));
    deeplake_executor_exec_methods.CustomName = "DeeplakeExecutor";
    deeplake_executor_exec_methods.BeginCustomScan = deeplake_executor_begin_scan;
    deeplake_executor_exec_methods.ExecCustomScan = deeplake_executor_exec_scan;
    deeplake_executor_exec_methods.EndCustomScan = deeplake_executor_end_scan;
    deeplake_executor_exec_methods.ReScanCustomScan = deeplake_executor_rescan;
    deeplake_executor_exec_methods.ExplainCustomScan = deeplake_executor_explain;

    // Initialize COUNT(*) executor scan methods
    memset(&count_executor_scan_methods, 0, sizeof(count_executor_scan_methods));
    count_executor_scan_methods.CustomName = "CountExecutor";
    count_executor_scan_methods.CreateCustomScanState = count_executor_create_scan_state;

    // Initialize COUNT(*) executor exec methods
    memset(&count_executor_exec_methods, 0, sizeof(count_executor_exec_methods));
    count_executor_exec_methods.CustomName = "CountExecutor";
    count_executor_exec_methods.BeginCustomScan = count_executor_begin_scan;
    count_executor_exec_methods.ExecCustomScan = count_executor_exec_scan;
    count_executor_exec_methods.EndCustomScan = count_executor_end_scan;
    count_executor_exec_methods.ReScanCustomScan = count_executor_rescan;
    count_executor_exec_methods.ExplainCustomScan = count_executor_explain;
}

// Helper: Convert deeplake sample to PostgreSQL Datum
Datum deeplake_sample_to_datum(