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体验新版 GitCode,发现更多精彩内容 >>
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02c0eb65
编写于
11月 26, 1996
作者:
B
Bryan Henderson
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差异文件
Properly structure ProcedureNameIndexScan so it doesn't generate
"may be used before being set" warnings.
上级
bf140172
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
53 addition
and
38 deletion
+53
-38
src/backend/catalog/indexing.c
src/backend/catalog/indexing.c
+53
-38
未找到文件。
src/backend/catalog/indexing.c
浏览文件 @
02c0eb65
...
...
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/indexing.c,v 1.
6 1996/11/13 20:47:57 scrappy
Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/indexing.c,v 1.
7 1996/11/26 02:45:05 bryanh
Exp $
*
*-------------------------------------------------------------------------
*/
...
...
@@ -352,26 +352,36 @@ ProcedureOidIndexScan(Relation heapRelation, Oid procId)
return
tuple
;
}
HeapTuple
ProcedureNameIndexScan
(
Relation
heapRelation
,
char
*
procName
,
int
nargs
,
Oid
*
argTypes
)
char
*
procName
,
int
nargs
,
Oid
*
argTypes
)
{
Relation
idesc
;
ScanKeyData
skey
;
HeapTuple
tuple
;
HeapTuple
tuple
;
/* tuple being tested */
HeapTuple
return_tuple
;
/* The tuple pointer we eventually return */
IndexScanDesc
sd
;
RetrieveIndexResult
indexRes
;
Buffer
buffer
;
Form_pg_proc
pgProcP
;
bool
bufferUsed
=
FALSE
;
bool
ScanComplete
;
/* The index scan is complete, i.e. we've scanned everything there
is to scan.
*/
bool
FoundMatch
;
/* In scanning pg_proc, we have found a row that meets our search
criteria.
*/
ScanKeyEntryInitialize
(
&
skey
,
(
bits16
)
0x0
,
(
AttrNumber
)
1
,
(
RegProcedure
)
NameEqualRegProcedure
,
(
Datum
)
procName
);
(
bits16
)
0x0
,
(
AttrNumber
)
1
,
(
RegProcedure
)
NameEqualRegProcedure
,
(
Datum
)
procName
);
idesc
=
index_openr
(
ProcedureNameIndex
);
...
...
@@ -382,41 +392,46 @@ ProcedureNameIndexScan(Relation heapRelation,
* by hand, so that we can check that the other keys match. when
* multi-key indices are added, they will be used here.
*/
do
{
tuple
=
(
HeapTuple
)
NULL
;
if
(
bufferUsed
)
{
ReleaseBuffer
(
buffer
);
bufferUsed
=
FALSE
;
}
indexRes
=
index_getnext
(
sd
,
ForwardScanDirection
);
if
(
indexRes
)
{
ItemPointer
iptr
;
iptr
=
&
indexRes
->
heap_iptr
;
tuple
=
heap_fetch
(
heapRelation
,
NowTimeQual
,
iptr
,
&
buffer
);
pfree
(
indexRes
);
if
(
HeapTupleIsValid
(
tuple
))
{
pgProcP
=
(
Form_pg_proc
)
GETSTRUCT
(
tuple
);
bufferUsed
=
TRUE
;
}
}
else
break
;
}
while
(
!
HeapTupleIsValid
(
tuple
)
||
pgProcP
->
pronargs
!=
nargs
||
!
oid8eq
(
&
(
pgProcP
->
proargtypes
[
0
]),
argTypes
));
if
(
HeapTupleIsValid
(
tuple
))
{
tuple
=
heap_copytuple
(
tuple
);
ReleaseBuffer
(
buffer
);
tuple
=
(
HeapTuple
)
NULL
;
/* initial value */
ScanComplete
=
false
;
/* Scan hasn't begun yet */
FoundMatch
=
false
;
/* No match yet; haven't even looked. */
while
(
!
FoundMatch
&&
!
ScanComplete
)
{
indexRes
=
index_getnext
(
sd
,
ForwardScanDirection
);
if
(
indexRes
)
{
ItemPointer
iptr
;
iptr
=
&
indexRes
->
heap_iptr
;
tuple
=
heap_fetch
(
heapRelation
,
NowTimeQual
,
iptr
,
&
buffer
);
pfree
(
indexRes
);
if
(
HeapTupleIsValid
(
tuple
))
{
/* Here's a row for a procedure that has the sought procedure
name. To be a match, though, we need it to have the
right number and type of arguments too, so we check that
now.
*/
pgProcP
=
(
Form_pg_proc
)
GETSTRUCT
(
tuple
);
if
(
pgProcP
->
pronargs
==
nargs
&&
oid8eq
(
&
(
pgProcP
->
proargtypes
[
0
]),
argTypes
))
FoundMatch
=
true
;
else
ReleaseBuffer
(
buffer
);
}
}
else
ScanComplete
=
true
;
}
if
(
FoundMatch
)
{
Assert
(
HeapTupleIsValid
(
tuple
));
return_tuple
=
heap_copytuple
(
tuple
);
ReleaseBuffer
(
buffer
);
}
else
return_tuple
=
(
HeapTuple
)
NULL
;
index_endscan
(
sd
);
index_close
(
idesc
);
return
tuple
;
return
return_
tuple
;
}
HeapTuple
ProcedureSrcIndexScan
(
Relation
heapRelation
,
text
*
procSrc
)
{
...
...
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