Enhancement: Change atomic_writes table option to enum type. Now every file can either use atomic writes, not use it or use default.

SYNTAX: ATOMIC_WRITES=['DEFAULT','ON','OFF']

Idea here is to be able to define innodb_doublewrite = 1 but with following rules:

ATOMIC_WRITES='DEFAULT' - if innodb_use_atomic_writes = 1, we do not write to doublewrite buffer the changes
                          if innodb_use_atomic_writes = 0, we write to doublewrite buffer
ATOMIC_WRITES='ON'      - do not write to doublewrite buffer
ATOMIC_WRITES='OFF'     - write to doublewrite buffer

Note that doublewrite buffer can't be used if innodb_doublewrite = 0.

1 files changed, 6 insertions, 6 deletions

diff --git a/storage/innobase/include/dict0pagecompress.ic b/storage/innobase/include/dict0pagecompress.ic
index 98b64723542..fb9581fc657 100644
--- a/storage/innobase/include/dict0pagecompress.ic
+++ b/storage/innobase/include/dict0pagecompress.ic
@@ -168,24 +168,24 @@ dict_table_is_page_compressed(
 
 /********************************************************************//**
 Extract the atomic writes flag from table flags.
-@return	true if atomic writes are used, false if not used  */
+@return	enumerated value of atomic writes  */
 UNIV_INLINE
-ibool
+atomic_writes_t
 dict_tf_get_atomic_writes(
 /*======================*/
 	ulint	flags)			/*!< in: flags */
 {
-	return(DICT_TF_GET_ATOMIC_WRITES(flags));
+	return((atomic_writes_t)DICT_TF_GET_ATOMIC_WRITES(flags));
 }
 
 /********************************************************************//**
 Check whether the table uses the atomic writes.
-@return	true if atomic writes is used, false if not */
+@return	enumerated value of atomic writes */
 UNIV_INLINE
-ibool
+atomic_writes_t
 dict_table_get_atomic_writes(
 /*=========================*/
 	const dict_table_t* table)	/*!< in: table */
 {
-	return (dict_tf_get_atomic_writes(table->flags));
+	return ((atomic_writes_t)dict_tf_get_atomic_writes(table->flags));
 }