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Overview
| Comment: | Fix a problem with resizing a hash table in sqlite3session.c. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | sessions |
| Files: | files | file ages | folders |
| SHA1: |
6e5907e14d3316d56313243c4f8ce8f1 |
| User & Date: | dan 2011-03-19 16:26:12 |
Context
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2011-03-19
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| 17:07 | Move session1.test from test/ to ext/session/. check-in: c4436a93 user: dan tags: sessions | |
| 16:26 | Fix a problem with resizing a hash table in sqlite3session.c. check-in: 6e5907e1 user: dan tags: sessions | |
| 15:37 | Fix some bugs in sqlite3changeset_apply(). check-in: 7250318d user: dan tags: sessions | |
Changes
Changes to ext/session/session2.test.
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CREATE TABLE t1(a PRIMARY KEY, b);
CREATE TABLE t2(a, b INTEGER PRIMARY KEY);
CREATE TABLE t3(a, b, c, PRIMARY KEY(a, b));
}
foreach {tn sql} {
1 { INSERT INTO t1 VALUES(1, 2) }
2 {
INSERT INTO t2 VALUES(1, NULL);
INSERT INTO t2 VALUES(2, NULL);
INSERT INTO t2 VALUES(3, NULL);
DELETE FROM t2 WHERE a = 2;
INSERT INTO t2 VALUES(4, NULL);
UPDATE t2 SET b=0 WHERE b=1;
}
3 { INSERT INTO t3 SELECT *, NULL FROM t2 }
4 {
INSERT INTO t3 SELECT a||a, b||b, NULL FROM t3;
DELETE FROM t3 WHERE rowid%2;
}
5 { UPDATE t3 SET c = a||b }
6 { UPDATE t1 SET a = 32 }
} {
do_then_apply_sql $sql
do_test $tn { compare_db db db2 } {}
}
finish_test
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CREATE TABLE t1(a PRIMARY KEY, b);
CREATE TABLE t2(a, b INTEGER PRIMARY KEY);
CREATE TABLE t3(a, b, c, PRIMARY KEY(a, b));
}
foreach {tn sql} {
1 { INSERT INTO t1 VALUES(1, 2) }
2 {
INSERT INTO t2 VALUES(1, NULL);
INSERT INTO t2 VALUES(2, NULL);
INSERT INTO t2 VALUES(3, NULL);
DELETE FROM t2 WHERE a = 2;
INSERT INTO t2 VALUES(4, NULL);
UPDATE t2 SET b=0 WHERE b=1;
}
3 { INSERT INTO t3 SELECT *, NULL FROM t2 }
4 {
INSERT INTO t3 SELECT a||a, b||b, NULL FROM t3;
DELETE FROM t3 WHERE rowid%2;
}
5 { UPDATE t3 SET c = a||b }
6 { UPDATE t1 SET a = 32 }
7 {
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 2
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 4
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 8
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 16
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 32
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 64
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 128
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 256
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 512
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 1024
INSERT INTO t1 SELECT randomblob(32), randomblob(32) FROM t1; -- 2048
DELETE FROM t1 WHERE (rowid%3)==0;
}
} {
do_then_apply_sql $sql
do_test $tn { compare_db db db2 } {}
}
finish_test
|
Changes to ext/session/sqlite3session.c.
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}
}
*pnWrite += nByte;
return SQLITE_OK;
}
#define HASH_APPEND(hash, add) ((hash) << 3) ^ (hash) ^ (int)(add)
static int sessionHashAppendI64(int h, i64 i){
h = HASH_APPEND(h, i & 0xFFFFFFFF);
return HASH_APPEND(h, (i>>32)&0xFFFFFFFF);
}
static int sessionHashAppendBlob(int h, int n, const u8 *z){
int i;
for(i=0; i<n; i++) h = HASH_APPEND(h, z[i]);
return h;
}
/*
** This function calculates a hash based on the primary key values of
** the old.* or new.* row currently available.
*/
static int sessionPreupdateHash(
sqlite3 *db, /* Database handle */
SessionTable *pTab, /* Session table handle */
int bNew, /* True to hash the new.* PK */
int *piHash /* OUT: Hash value */
){
int h = 0;
int i;
assert( pTab->nCol==sqlite3_preupdate_count(db) );
for(i=0; i<pTab->nCol; i++){
if( pTab->abPK[i] ){
int rc;
int eType;
sqlite3_value *pVal;
................................................................................
}
}
*piHash = (h % pTab->nChange);
return SQLITE_OK;
}
static int sessionChangeHash(
sqlite3 *db,
SessionTable *pTab,
SessionChange *pChange,
int nBucket
){
int h = 0;
int i;
u8 *a = pChange->aRecord;
for(i=0; i<pTab->nCol; i++){
int eType = *a++;
int isPK = pTab->abPK[i];
if( isPK ) h = HASH_APPEND(h, eType);
switch( eType ){
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}
}
*pnWrite += nByte;
return SQLITE_OK;
}
#define HASH_APPEND(hash, add) ((hash) << 3) ^ (hash) ^ (unsigned int)(add)
static unsigned int sessionHashAppendI64(unsigned int h, i64 i){
h = HASH_APPEND(h, i & 0xFFFFFFFF);
return HASH_APPEND(h, (i>>32)&0xFFFFFFFF);
}
static unsigned int sessionHashAppendBlob(unsigned int h, int n, const u8 *z){
int i;
for(i=0; i<n; i++) h = HASH_APPEND(h, z[i]);
return h;
}
/*
** This function may only be called from within a pre-update callback.
** It calculates a hash based on the primary key values of the old.* or
** new.* row currently available. The value returned is guaranteed to
** be less than pTab->nBucket.
*/
static unsigned int sessionPreupdateHash(
sqlite3 *db, /* Database handle */
SessionTable *pTab, /* Session table handle */
int bNew, /* True to hash the new.* PK */
int *piHash /* OUT: Hash value */
){
unsigned int h = 0; /* Hash value to return */
int i; /* Used to iterate through columns */
assert( pTab->nCol==sqlite3_preupdate_count(db) );
for(i=0; i<pTab->nCol; i++){
if( pTab->abPK[i] ){
int rc;
int eType;
sqlite3_value *pVal;
................................................................................
}
}
*piHash = (h % pTab->nChange);
return SQLITE_OK;
}
/*
** Based on the primary key values stored in change pChange, calculate a
** hash key, assuming the has table has nBucket buckets. The hash keys
** calculated by this function are compatible with those calculated by
** sessionPreupdateHash().
*/
static unsigned int sessionChangeHash(
sqlite3 *db, /* Database handle */
SessionTable *pTab, /* Table handle */
SessionChange *pChange, /* Change handle */
int nBucket /* Assume this many buckets in hash table */
){
unsigned int h = 0; /* Value to return */
int i; /* Used to iterate through columns */
u8 *a = pChange->aRecord; /* Used to iterate through change record */
for(i=0; i<pTab->nCol; i++){
int eType = *a++;
int isPK = pTab->abPK[i];
if( isPK ) h = HASH_APPEND(h, eType);
switch( eType ){
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