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-rw-r--r--mysql-test/include/binlog_start_pos.inc28
1 files changed, 28 insertions, 0 deletions
diff --git a/mysql-test/include/binlog_start_pos.inc b/mysql-test/include/binlog_start_pos.inc
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+##############################################################################
+#
+# binlog_start_pos is the postion of the the first event in the binary log
+# which follows the Format description event. Intended to reduce test suite
+# dependance on the Format description event length changes (e.g. in case
+# of adding new events). Evaluated as:
+#
+# binlog_start_pos = 4 /* binlog header */ +
+# (Format_description_log_event length)
+#
+# Format_description_log_event length =
+# 19 /* event common header */ +
+# 57 /* misc stuff in the Format description header */ +
+# number of events +
+# 1 /* Checksum algorithm */ +
+# 4 /* CRC32 length */
+#
+# With current number of events = 171,
+#
+# binlog_start_pos = 4 + 19 + 57 + 171 + 1 + 4 = 256.
+#
+##############################################################################
+
+--disable_query_log
+set @binlog_start_pos=256 + @@encrypt_binlog * (36 + (@@binlog_checksum != 'NONE') * 4);
+--enable_query_log
+let $binlog_start_pos=`select @binlog_start_pos`;
+