Backporting WL#4398 WL#1720

Backporting BUG#44058 BUG#42244 BUG#45672 BUG#45673
Backporting BUG#45819 BUG#45973 BUG#39012

2 files changed, 88 insertions, 1 deletions

diff --git a/include/mysql/plugin.h b/include/mysql/plugin.h
index 2e59262d061..45d0234cb67 100644
--- a/include/mysql/plugin.h
+++ b/include/mysql/plugin.h
@@ -16,6 +16,11 @@
 #ifndef _my_plugin_h
 #define _my_plugin_h
 
+/* size_t */
+#include <stdlib.h>
+
+typedef struct st_mysql MYSQL;
+
 
 /*
   On Windows, exports from DLL need to be declared
@@ -75,7 +80,8 @@ typedef struct st_mysql_xid MYSQL_XID;
 #define MYSQL_FTPARSER_PLUGIN        2  /* Full-text parser plugin      */
 #define MYSQL_DAEMON_PLUGIN          3  /* The daemon/raw plugin type */
 #define MYSQL_INFORMATION_SCHEMA_PLUGIN  4  /* The I_S plugin type */
-#define MYSQL_MAX_PLUGIN_TYPE_NUM    5  /* The number of plugin types   */
+#define MYSQL_REPLICATION_PLUGIN     5	/* The replication plugin type */
+#define MYSQL_MAX_PLUGIN_TYPE_NUM    6  /* The number of plugin types   */
 
 /* We use the following strings to define licenses for plugins */
 #define PLUGIN_LICENSE_PROPRIETARY 0
@@ -650,6 +656,17 @@ struct st_mysql_information_schema
   int interface_version;
 };
 
+/*
+  API for Replication plugin. (MYSQL_REPLICATION_PLUGIN)
+*/
+ #define MYSQL_REPLICATION_INTERFACE_VERSION 0x0100
+ 
+ /**
+    Replication plugin descriptor
+ */
+ struct Mysql_replication {
+   int interface_version;
+ };
 
 /*
   st_mysql_value struct for reading values from mysqld.
@@ -801,6 +818,64 @@ void mysql_query_cache_invalidate4(MYSQL_THD thd,
                                    const char *key, unsigned int key_length,
                                    int using_trx);
 
+/**
+   Get the value of user variable as an integer.
+
+   This function will return the value of variable @a name as an
+   integer. If the original value of the variable is not an integer,
+   the value will be converted into an integer.
+
+   @param name     user variable name
+   @param value    pointer to return the value
+   @param null_value if not NULL, the function will set it to true if
+   the value of variable is null, set to false if not
+
+   @retval 0 Success
+   @retval 1 Variable not found
+*/
+int get_user_var_int(const char *name,
+                     long long int *value, int *null_value);
+
+/**
+   Get the value of user variable as a double precision float number.
+
+   This function will return the value of variable @a name as real
+   number. If the original value of the variable is not a real number,
+   the value will be converted into a real number.
+
+   @param name     user variable name
+   @param value    pointer to return the value
+   @param null_value if not NULL, the function will set it to true if
+   the value of variable is null, set to false if not
+
+   @retval 0 Success
+   @retval 1 Variable not found
+*/
+int get_user_var_real(const char *name,
+                      double *value, int *null_value);
+
+/**
+   Get the value of user variable as a string.
+
+   This function will return the value of variable @a name as
+   string. If the original value of the variable is not a string,
+   the value will be converted into a string.
+
+   @param name     user variable name
+   @param value    pointer to the value buffer
+   @param len      length of the value buffer
+   @param precision precision of the value if it is a float number
+   @param null_value if not NULL, the function will set it to true if
+   the value of variable is null, set to false if not
+
+   @retval 0 Success
+   @retval 1 Variable not found
+*/
+int get_user_var_str(const char *name,
+                     char *value, unsigned long len,
+                     unsigned int precision, int *null_value);
+
+  
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/mysql/plugin.h.pp b/include/mysql/plugin.h.pp
index 50511f515ab..d864140333b 100644
--- a/include/mysql/plugin.h.pp
+++ b/include/mysql/plugin.h.pp
@@ -1,3 +1,5 @@
+#include <stdlib.h>
+typedef struct st_mysql MYSQL;
 struct st_mysql_lex_string
 {
   char *str;
@@ -105,6 +107,9 @@ struct st_mysql_information_schema
 {
   int interface_version;
 };
+struct Mysql_replication {
+  int interface_version;
+};
 struct st_mysql_value
 {
   int (*value_type)(struct st_mysql_value *);
@@ -137,3 +142,10 @@ void thd_get_xid(const void* thd, MYSQL_XID *xid);
 void mysql_query_cache_invalidate4(void* thd,
                                    const char *key, unsigned int key_length,
                                    int using_trx);
+int get_user_var_int(const char *name,
+                     long long int *value, int *null_value);
+int get_user_var_real(const char *name,
+                      double *value, int *null_value);
+int get_user_var_str(const char *name,
+                     char *value, unsigned long len,
+                     unsigned int precision, int *null_value);