Dear Ivan,
thanks a lot, that is helpful.
Still, I feel that default partial matching cripples the functionality
of data.frame for larger tables.
Thanks again and best regards
Hilmar
On 12.12.23 13:55, Ivan Krylov wrote:
В Mon, 11 Dec 2023 21:11:48 +0100
Hilmar Berger via R-devel <r-devel@r-project.org> пишет:
What was unexpected is that in this case was that [.data.frame was
hanging for a long time (I waited about 10 minutes and then restarted
R). Also, this cannot be interrupted in interactive mode.
That's unfortunate. If an operation takes a long time, it ought to be
interruptible. Here's a patch that passes make check-devel:
--- src/main/unique.c (revision 85667)
+++ src/main/unique.c (working copy)
@@ -1631,6 +1631,7 @@
}
}
+ unsigned int ic = 9999;
if(nexact < n_input) {
/* Second pass, partial matching */
for (R_xlen_t i = 0; i < n_input; i++) {
@@ -1642,6 +1643,10 @@
mtch = 0;
mtch_count = 0;
for (int j = 0; j < n_target; j++) {
+ if (!--ic) {
+ R_CheckUserInterrupt();
+ ic = 9999;
+ }
if (no_dups && used[j]) continue;
if (strncmp(ss, tar[j], temp) == 0) {
mtch = j + 1;
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