Many files:

  Merge InnoDB-3.23.52c; improve AUTO-INC algorithm with SHOW TABLE STATUS; new checksum in log

1 files changed, 31 insertions, 8 deletions

diff --git a/innobase/dict/dict0dict.c b/innobase/dict/dict0dict.c
index 9ed1d088290..65f40d345d8 100644
--- a/innobase/dict/dict0dict.c
+++ b/innobase/dict/dict0dict.c
@@ -261,7 +261,7 @@ dict_table_get_index_noninline(
 {
 	return(dict_table_get_index(table, name));
 }
-
+	
 /************************************************************************
 Initializes the autoinc counter. It is not an error to initialize an already
 initialized counter. */
@@ -270,7 +270,7 @@ void
 dict_table_autoinc_initialize(
 /*==========================*/
 	dict_table_t*	table,	/* in: table */
-	ib_longlong	value)	/* in: value which was assigned to a row */
+	ib_longlong	value)	/* in: next value to assign to a row */
 {
 	mutex_enter(&(table->autoinc_mutex));
 
@@ -281,8 +281,8 @@ dict_table_autoinc_initialize(
 }
 
 /************************************************************************
-Gets the next autoinc value, 0 if not yet initialized. If initialized,
-increments the counter by 1. */
+Gets the next autoinc value (== autoinc counter value), 0 if not yet
+initialized. If initialized, increments the counter by 1. */
 
 ib_longlong
 dict_table_autoinc_get(
@@ -298,8 +298,8 @@ dict_table_autoinc_get(
 
 		value = 0;
 	} else {
-		table->autoinc = table->autoinc + 1;
 		value = table->autoinc;
+		table->autoinc = table->autoinc + 1;
 	}
 	
 	mutex_exit(&(table->autoinc_mutex));
@@ -334,20 +334,43 @@ dict_table_autoinc_read(
 }
 
 /************************************************************************
-Updates the autoinc counter if the value supplied is bigger than the
+Peeks the autoinc counter value, 0 if not yet initialized. Does not
+increment the counter. The read not protected by any mutex! */
+
+ib_longlong
+dict_table_autoinc_peek(
+/*====================*/
+				/* out: value of the counter */
+	dict_table_t*	table)	/* in: table */
+{
+	ib_longlong	value;
+
+	if (!table->autoinc_inited) {
+
+		value = 0;
+	} else {
+		value = table->autoinc;
+	}
+
+	return(value);
+}
+
+/************************************************************************
+Updates the autoinc counter if the value supplied is equal or bigger than the
 current value. If not inited, does nothing. */
 
 void
 dict_table_autoinc_update(
 /*======================*/
+
 	dict_table_t*	table,	/* in: table */
 	ib_longlong	value)	/* in: value which was assigned to a row */
 {
 	mutex_enter(&(table->autoinc_mutex));
 
 	if (table->autoinc_inited) {
-		if (value > table->autoinc) {
-			table->autoinc = value;
+		if (value >= table->autoinc) {
+			table->autoinc = value + 1;
 		}
 	}