From 7f0d10e9c2c65527fbb01acd777366d00596e72c Mon Sep 17 00:00:00 2001 From: Fujii Masao Date: Fri, 8 Nov 2024 00:34:55 +0900 Subject: [PATCH v3] pgbench: Ensure previous progress message is fully cleared when updating. During pgbench's table initialization, progress updates could display leftover characters from the previous message if the new message was shorter. This commit resolves the issue by appending spaces to the current message to fully overwrite any remaining characters from the previous line. Back-patch to all the supported versions. Author: Yushi Ogiwara, Tatsuo Ishii, Fujii Masao Reviewed-by: Tatsuo Ishii, Fujii Masao Discussion: https://postgr.es/m/9a9b8b95b6a709877ae48ad5b0c59bb9@oss.nttdata.com --- src/bin/pgbench/pgbench.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/src/bin/pgbench/pgbench.c b/src/bin/pgbench/pgbench.c index ba247f3f85..19a82244b5 100644 --- a/src/bin/pgbench/pgbench.c +++ b/src/bin/pgbench/pgbench.c @@ -4944,6 +4944,7 @@ initPopulateTable(PGconn *con, const char *table, int64 base, int n; int64 k; int chars = 0; + int prev_chars = 0; PGresult *res; PQExpBufferData sql; char copy_statement[256]; @@ -5004,10 +5005,10 @@ initPopulateTable(PGconn *con, const char *table, int64 base, double elapsed_sec = PG_TIME_GET_DOUBLE(pg_time_now() - start); double remaining_sec = ((double) total - j) * elapsed_sec / j; - chars = fprintf(stderr, INT64_FORMAT " of " INT64_FORMAT " tuples (%d%%) of %s done (elapsed %.2f s, remaining %.2f s)%c", + chars = fprintf(stderr, INT64_FORMAT " of " INT64_FORMAT " tuples (%d%%) of %s done (elapsed %.2f s, remaining %.2f s)", j, total, (int) ((j * 100) / total), - table, elapsed_sec, remaining_sec, eol); + table, elapsed_sec, remaining_sec); } /* let's not call the timing for each row, but only each 100 rows */ else if (use_quiet && (j % 100 == 0)) @@ -5018,15 +5019,25 @@ initPopulateTable(PGconn *con, const char *table, int64 base, /* have we reached the next interval (or end)? */ if ((j == total) || (elapsed_sec >= log_interval * LOG_STEP_SECONDS)) { - chars = fprintf(stderr, INT64_FORMAT " of " INT64_FORMAT " tuples (%d%%) of %s done (elapsed %.2f s, remaining %.2f s)%c", + chars = fprintf(stderr, INT64_FORMAT " of " INT64_FORMAT " tuples (%d%%) of %s done (elapsed %.2f s, remaining %.2f s)", j, total, (int) ((j * 100) / total), - table, elapsed_sec, remaining_sec, eol); + table, elapsed_sec, remaining_sec); /* skip to the next interval */ log_interval = (int) ceil(elapsed_sec / LOG_STEP_SECONDS); } } + + /* + * If the previous progress message is longer than the current one, + * add spaces to the current line to fully overwrite any remaining + * characters from the previous message. + */ + if (prev_chars > chars) + fprintf(stderr, "%*c", prev_chars - chars, ' '); + fputc(eol, stderr); + prev_chars = chars; } if (chars != 0 && eol != '\n') -- 2.47.0