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Levin Zimmermann
neoppod
Commits
bbc76236
Commit
bbc76236
authored
Feb 15, 2018
by
Kirill Smelkov
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parent
c70467a6
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1 changed file
with
33 additions
and
8 deletions
+33
-8
go/neo/storage/sqlite/sqlite.go
go/neo/storage/sqlite/sqlite.go
+33
-8
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go/neo/storage/sqlite/sqlite.go
View file @
bbc76236
...
...
@@ -36,10 +36,10 @@ import (
_
"github.com/mattn/go-sqlite3"
)
const
version
=
2
// ---- schema ----
const
schemaVersion
=
2
// table "config" stores configuration parameters which affect the persistent data.
//
// XXX
...
...
@@ -79,7 +79,8 @@ const obj = `
tid INTEGER NOT NULL,
data_id INTEGER, -- -> data.id
value_tid INTEGER, -- data_tid for zodb
-- XXX ^^^ can be NOT NULL with 0 serving instead
PRIMARY KEY (partition, oid, tid)
`
// `(partition, tid, oid)`
...
...
@@ -172,7 +173,7 @@ func (b *Backend) LastOid(ctx context.Context) (zodb.Oid, error) {
err
:=
b
.
query1
(
ctx
,
"SELECT MAX(oid) FROM pt, obj WHERE nid=? AND rid=partition"
,
myID
)
.
Scan
(
lastOid
)
myID
)
.
Scan
(
&
lastOid
)
if
err
!=
nil
{
// no objects
...
...
@@ -193,19 +194,31 @@ func (b *Backend) Load(ctx context.Context, xid zodb.Xid) (_ *proto.AnswerObject
}
}()
obj
:=
&
proto
.
AnswerObject
{
Oid
:
xid
.
Oid
}
var
data
sql
.
RawBytes
obj
:=
&
proto
.
AnswerObject
{
Oid
:
xid
.
Oid
,
DataSerial
:
0
}
// TODO reenable, but XXX we have to use Query, not QueryRow for RawBytes support
//var data sql.RawBytes
var
data
[]
byte
// hash is variable-length BLOB - Scan refuses to put it into [20]byte
//var hash sql.RawBytes
var
hash
[]
byte
// obj.value_tid can be null
var
valueTid
sql
.
NullInt64
// XXX ok not to uint64 - max tid is max signed int64
// FIXME pid = getReadablePartition (= oid % Np; error if pid not readable)
pid
:=
0
// XXX somehow detect errors in sql misuse and log them as 500 without reporting to client?
// XXX such errors start with "unsupported Scan, "
err
=
b
.
query1
(
ctx
,
"SELECT tid, compression, data.hash, value, value_tid"
+
" FROM obj LEFT JOIN data ON obj.data_id = data.id"
+
" WHERE partition=? AND oid=? AND tid<=?"
+
" ORDER BY tid DESC LIMIT 1"
,
pid
,
xid
.
Oid
,
xid
.
At
)
.
Scan
(
&
obj
.
Serial
,
&
obj
.
Compression
,
&
obj
.
Checksum
,
&
data
,
&
obj
.
DataSerial
)
Scan
(
&
obj
.
Serial
,
&
obj
.
Compression
,
&
hash
,
&
data
,
&
valueTid
)
if
err
!=
nil
{
if
err
==
sql
.
ErrNoRows
{
...
...
@@ -231,6 +244,18 @@ func (b *Backend) Load(ctx context.Context, xid zodb.Xid) (_ *proto.AnswerObject
return
nil
,
err
}
// hash -> obj.Checksum
if
len
(
hash
)
!=
len
(
obj
.
Checksum
)
{
return
nil
,
fmt
.
Errorf
(
"data corrupt: len(hash) = %d"
,
len
(
hash
))
}
copy
(
obj
.
Checksum
[
:
],
hash
)
// valueTid -> obj.DataSerial
if
valueTid
.
Valid
{
obj
.
DataSerial
=
zodb
.
Tid
(
valueTid
.
Int64
)
}
// data -> obj.Data
obj
.
Data
=
mem
.
BufAlloc
(
len
(
data
))
copy
(
obj
.
Data
.
Data
,
data
)
...
...
@@ -309,7 +334,7 @@ func openURL(ctx context.Context, u *url.URL) (_ storage.Backend, err error) {
}
}
checkConfig
(
"version"
,
v
ersion
)
checkConfig
(
"version"
,
schemaV
ersion
)
checkConfig
(
"nid"
,
proto
.
UUID
(
proto
.
STORAGE
,
1
))
checkConfig
(
"partitions"
,
1
)
checkConfig
(
"replicas"
,
1
)
...
...
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