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Added GWBUF type GWBUF_TYPE_SINGLE_STMT to indicate that buffer only includes single complete stmt. Added macro for checking the flag and changed existing routines as necessary.

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This commit is contained in:
VilhoRaatikka
2014-06-24 21:51:54 +03:00
parent 619aeb4afa
commit 442ac7fefb
2 changed files with 29 additions and 27 deletions
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43
server/core/buffer.c
View File

@ -185,30 +185,28 @@ GWBUF *gwbuf_clone_transform(
goto return_clonebuf;
}
switch (src_type)
if (GWBUF_IS_TYPE_MYSQL(head))
{
case GWBUF_TYPE_MYSQL:
if (targettype == GWBUF_TYPE_PLAINSQL)
{
/** Crete reference to string part of buffer */
clonebuf = gwbuf_clone_portion(
head,
5,
GWBUF_LENGTH(head)-5);
ss_dassert(clonebuf != NULL);
/** Overwrite the type with new format */
clonebuf->gwbuf_type = targettype;
}
else
{
clonebuf = NULL;
}
break;
default:
if (GWBUF_TYPE_PLAINSQL == targettype)
{
/** Crete reference to string part of buffer */
clonebuf = gwbuf_clone_portion(
head,
5,
GWBUF_LENGTH(head)-5);
ss_dassert(clonebuf != NULL);
/** Overwrite the type with new format */
gwbuf_set_type(clonebuf, targettype);
}
else
{
clonebuf = NULL;
break;
} /*< switch (src_type) */
}
}
else
{
clonebuf = NULL;
}
return_clonebuf:
return clonebuf;
@ -308,6 +306,7 @@ bool gwbuf_set_type(
case GWBUF_TYPE_MYSQL:
case GWBUF_TYPE_PLAINSQL:
case GWBUF_TYPE_UNDEFINED:
case GWBUF_TYPE_SINGLE_STMT: /*< buffer contains one stmt */
buf->gwbuf_type |= type;
succp = true;
break;

13
server/include/buffer.h
View File

@ -46,13 +46,16 @@
typedef enum
{
GWBUF_TYPE_UNDEFINED = 0x00,
GWBUF_TYPE_PLAINSQL = 0x01,
GWBUF_TYPE_MYSQL = 0x02
GWBUF_TYPE_UNDEFINED = 0x00,
GWBUF_TYPE_PLAINSQL = 0x01,
GWBUF_TYPE_MYSQL = 0x02,
GWBUF_TYPE_SINGLE_STMT = 0x04
} gwbuf_type_t;
#define GWBUF_IS_TYPE_PLAINSQL(b) (b->gwbuf_type & GWBUF_TYPE_PLAINSQL)
#define GWBUF_IS_TYPE_MYSQL(b) (b->gwbuf_type & GWBUF_TYPE_MYSQL)
#define GWBUF_IS_TYPE_UNDEFINED(b) (b->gwbuf_type == 0)
#define GWBUF_IS_TYPE_PLAINSQL(b) (b->gwbuf_type & GWBUF_TYPE_PLAINSQL)
#define GWBUF_IS_TYPE_MYSQL(b) (b->gwbuf_type & GWBUF_TYPE_MYSQL)
#define GWBUF_IS_TYPE_SINGLE_STMT(b) (b->gwbuf_type & GWBUF_TYPE_SINGLE_STMT)
/**
* A structure to encapsulate the data in a form that the data itself can be