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Overview
Comment:Fix to xTruncate and more journal mode tests for the multiplex VFS.
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SHA1: 65fa1164f035d270db48db6474da888aacfba3bd
User & Date: shaneh 2010-11-05 20:50:44
Context
2010-11-08
19:16
Changes to the multiplex VFS to optionally (compiler define) allow the "chunk extension" to overwrite the right-most chars of the filename instead of simply being appended. check-in: 07da0a0b user: shaneh tags: trunk
19:01
Experimental changes to EXPLAIN QUERY PLAN. check-in: f4747eb8 user: dan tags: experimental
2010-11-05
20:50
Fix to xTruncate and more journal mode tests for the multiplex VFS. check-in: 65fa1164 user: shaneh tags: trunk
18:07
Fix os_unix.c so that it works with the test_multiplex module. check-in: 72ba3e36 user: dan tags: trunk
Changes
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Changes to src/test_multiplex.c. 

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#include <assert.h>
#include "sqliteInt.h"

/************************ Shim Definitions ******************************/

#define SQLITE_MULTIPLEX_CHUNK_SIZE 0x40000000
#define SQLITE_MULTIPLEX_MAX_CHUNKS 32


/************************ Object Definitions ******************************/

/* Forward declaration of all object types */
typedef struct multiplexGroup multiplexGroup;
typedef struct multiplexConn multiplexConn;

................................................................................
static sqlite3_file *multiplexSubOpen(multiplexConn *pConn, int iChunk, int *rc, int *pOutFlags){
  multiplexGroup *pGroup = pConn->pGroup;
  sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;        /* Real VFS */
  if( iChunk<gMultiplex.nMaxChunks ){
    sqlite3_file *pSubOpen = pGroup->pReal[iChunk];    /* Real file descriptor */
    if( !pGroup->bOpen[iChunk] ){
      pGroup->zName[pGroup->nName] = '\0';
      if( iChunk ) sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, "-%04d", iChunk);
      *rc = pOrigVfs->xOpen(pOrigVfs, pGroup->zName, pSubOpen, pGroup->flags, pOutFlags);
      if( *rc==SQLITE_OK ){
        pGroup->bOpen[iChunk] = -1;
        return pSubOpen;
      }
      return NULL;
    }
................................................................................
  UNUSED_PARAMETER(pVfs);

  multiplexEnter();
  memcpy(gMultiplex.zName, zName, nName+1);
  for(i=0; i<gMultiplex.nMaxChunks; i++){
    int rc2;
    int exists = 0;
    if( i ) sqlite3_snprintf(nName+6, gMultiplex.zName+nName, "-%04d", i);
    rc2 = pOrigVfs->xAccess(pOrigVfs, gMultiplex.zName, SQLITE_ACCESS_EXISTS, &exists);
    if( rc2==SQLITE_OK && exists){
      /* if it exists, delete it */
      rc2 = pOrigVfs->xDelete(pOrigVfs, gMultiplex.zName, syncDir);
      if( rc2!=SQLITE_OK ) rc = rc2;
    }else{
      /* stop at first "gap" */
................................................................................
  /* delete the chunks above the truncate limit */
  for(i=(int)(size/gMultiplex.nChunkSize)+1; i<gMultiplex.nMaxChunks; i++){
    /* close any open chunks before deleting them */
    if( pGroup->bOpen[i] ){
      pSubOpen = pGroup->pReal[i];
      rc2 = pSubOpen->pMethods->xClose(pSubOpen);
      if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE;

    }
    sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, "-%04d", i);
    rc2 = pOrigVfs->xDelete(pOrigVfs, pGroup->zName, 0);
    if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE;
  }
  pSubOpen = multiplexSubOpen(p, (int)(size/gMultiplex.nChunkSize), &rc2, NULL);
  if( pSubOpen ){
    rc2 = pSubOpen->pMethods->xTruncate(pSubOpen, size%gMultiplex.nChunkSize);
    if( rc2!=SQLITE_OK ) rc = rc2;
................................................................................
    /* if not opened already, check to see if the chunk exists */
    if( pGroup->bOpen[i] ){
      pSubOpen = pGroup->pReal[i];
    }else{
      sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;   /* Real VFS */
      int exists = 0;
      pGroup->zName[pGroup->nName] = '\0';
      if( i ) sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, "-%04d", i);
      rc2 = pOrigVfs->xAccess(pOrigVfs, pGroup->zName, SQLITE_ACCESS_EXISTS, &exists);
      if( rc2==SQLITE_OK && exists){
        /* if it exists, open it */
        pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
      }else{
        /* stop at first "gap" */
        break;








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#include <assert.h>
#include "sqliteInt.h"

/************************ Shim Definitions ******************************/

#define SQLITE_MULTIPLEX_CHUNK_SIZE 0x40000000
#define SQLITE_MULTIPLEX_MAX_CHUNKS 32
#define SQLITE_MULTIPLEX_EXT_FMT    "-%04d"

/************************ Object Definitions ******************************/

/* Forward declaration of all object types */
typedef struct multiplexGroup multiplexGroup;
typedef struct multiplexConn multiplexConn;

................................................................................
static sqlite3_file *multiplexSubOpen(multiplexConn *pConn, int iChunk, int *rc, int *pOutFlags){
  multiplexGroup *pGroup = pConn->pGroup;
  sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;        /* Real VFS */
  if( iChunk<gMultiplex.nMaxChunks ){
    sqlite3_file *pSubOpen = pGroup->pReal[iChunk];    /* Real file descriptor */
    if( !pGroup->bOpen[iChunk] ){
      pGroup->zName[pGroup->nName] = '\0';
      if( iChunk ) sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, SQLITE_MULTIPLEX_EXT_FMT, iChunk);
      *rc = pOrigVfs->xOpen(pOrigVfs, pGroup->zName, pSubOpen, pGroup->flags, pOutFlags);
      if( *rc==SQLITE_OK ){
        pGroup->bOpen[iChunk] = -1;
        return pSubOpen;
      }
      return NULL;
    }
................................................................................
  UNUSED_PARAMETER(pVfs);

  multiplexEnter();
  memcpy(gMultiplex.zName, zName, nName+1);
  for(i=0; i<gMultiplex.nMaxChunks; i++){
    int rc2;
    int exists = 0;
    if( i ) sqlite3_snprintf(nName+6, gMultiplex.zName+nName, SQLITE_MULTIPLEX_EXT_FMT, i);
    rc2 = pOrigVfs->xAccess(pOrigVfs, gMultiplex.zName, SQLITE_ACCESS_EXISTS, &exists);
    if( rc2==SQLITE_OK && exists){
      /* if it exists, delete it */
      rc2 = pOrigVfs->xDelete(pOrigVfs, gMultiplex.zName, syncDir);
      if( rc2!=SQLITE_OK ) rc = rc2;
    }else{
      /* stop at first "gap" */
................................................................................
  /* delete the chunks above the truncate limit */
  for(i=(int)(size/gMultiplex.nChunkSize)+1; i<gMultiplex.nMaxChunks; i++){
    /* close any open chunks before deleting them */
    if( pGroup->bOpen[i] ){
      pSubOpen = pGroup->pReal[i];
      rc2 = pSubOpen->pMethods->xClose(pSubOpen);
      if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE;
      pGroup->bOpen[i] = 0;
    }
    sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, SQLITE_MULTIPLEX_EXT_FMT, i);
    rc2 = pOrigVfs->xDelete(pOrigVfs, pGroup->zName, 0);
    if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE;
  }
  pSubOpen = multiplexSubOpen(p, (int)(size/gMultiplex.nChunkSize), &rc2, NULL);
  if( pSubOpen ){
    rc2 = pSubOpen->pMethods->xTruncate(pSubOpen, size%gMultiplex.nChunkSize);
    if( rc2!=SQLITE_OK ) rc = rc2;
................................................................................
    /* if not opened already, check to see if the chunk exists */
    if( pGroup->bOpen[i] ){
      pSubOpen = pGroup->pReal[i];
    }else{
      sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs;   /* Real VFS */
      int exists = 0;
      pGroup->zName[pGroup->nName] = '\0';
      if( i ) sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, SQLITE_MULTIPLEX_EXT_FMT, i);
      rc2 = pOrigVfs->xAccess(pOrigVfs, pGroup->zName, SQLITE_ACCESS_EXISTS, &exists);
      if( rc2==SQLITE_OK && exists){
        /* if it exists, open it */
        pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
      }else{
        /* stop at first "gap" */
        break;

Changes to test/multiplex.test. 

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#   multiplex-2.4.*: Try to shutdown the multiplex system before closing the db
#                file. Check that this fails and the multiplex system still works
#                afterwards. Then close the database and successfully shut
#                down the multiplex system.
#
#   multiplex-2.5.*: More reading/writing.
#
#   multiplex-2.6.*: More reading/writing with varying small chunk sizes.


sqlite3_multiplex_initialize "" 1
multiplex_set 32768 16

do_test multiplex-2.1.2 {
  sqlite3 db test.db
  execsql {
................................................................................

do_test multiplex-2.5.99 {
  db close
  sqlite3_multiplex_shutdown
} {SQLITE_OK}




for {set sz 151} {$sz<8000} {set sz [expr $sz+419]} {

  do_test multiplex-2.6.1.$sz {
    multiplex_delete test.db
    sqlite3_multiplex_initialize "" 1
    multiplex_set $sz 32
  } {SQLITE_OK}

  do_test multiplex-2.6.2.$sz {
    sqlite3 db test.db
    execsql {

      PRAGMA page_size = 1024;
      PRAGMA journal_mode = delete;
      PRAGMA auto_vacuum = off;
      CREATE TABLE t1(a PRIMARY KEY, b);
    }
  } {delete}


  do_test multiplex-2.6.3.$sz { 
    execsql { 

      INSERT INTO t1 VALUES(1, 'one');
      INSERT INTO t1 VALUES(2, randomblob($g_chunk_size));
    }
  } {}

  do_test multiplex-2.6.4.$sz {
    db eval {SELECT b FROM t1 WHERE a=1}
  } {one}

  do_test multiplex-2.6.5.$sz {
    db eval {SELECT length(b) FROM t1 WHERE a=2}
  } [list $g_chunk_size]

  do_test multiplex-2.6.6.$sz { file size test.db } [list $g_chunk_size]

  do_test multiplex-2.6.99.$sz {
    db close
    sqlite3_multiplex_shutdown
  } {SQLITE_OK}


}

#-------------------------------------------------------------------------
# Try some tests with more than one connection to a database file. Still
# in rollback mode.
#
#   multiplex-3.1.*: Two connections to a single database file.








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#   multiplex-2.4.*: Try to shutdown the multiplex system before closing the db
#                file. Check that this fails and the multiplex system still works
#                afterwards. Then close the database and successfully shut
#                down the multiplex system.
#
#   multiplex-2.5.*: More reading/writing.
#
#   multiplex-2.6.*: More reading/writing with varying small chunk sizes, as
#                well as varying journal mode.

sqlite3_multiplex_initialize "" 1
multiplex_set 32768 16

do_test multiplex-2.1.2 {
  sqlite3 db test.db
  execsql {
................................................................................

do_test multiplex-2.5.99 {
  db close
  sqlite3_multiplex_shutdown
} {SQLITE_OK}


set all_journal_modes {delete persist truncate memory off}
foreach jmode $all_journal_modes {
  for {set sz 151} {$sz<8000} {set sz [expr $sz+419]} {

    do_test multiplex-2.6.1.$sz.$jmode {
      multiplex_delete test.db
      sqlite3_multiplex_initialize "" 1
      multiplex_set $sz 32
    } {SQLITE_OK}

    do_test multiplex-2.6.2.$sz.$jmode {
      sqlite3 db test.db

      db eval {
        PRAGMA page_size = 1024;

        PRAGMA auto_vacuum = off;

      }
      db eval "PRAGMA journal_mode = $jmode;"
    } $jmode

    do_test multiplex-2.6.3.$sz.$jmode { 
      execsql { 
        CREATE TABLE t1(a PRIMARY KEY, b);
        INSERT INTO t1 VALUES(1, 'one');
        INSERT INTO t1 VALUES(2, randomblob($g_chunk_size));
      }
    } {}

    do_test multiplex-2.6.4.$sz.$jmode {
      db eval {SELECT b FROM t1 WHERE a=1}
    } {one}

    do_test multiplex-2.6.5.$sz.$jmode {
      db eval {SELECT length(b) FROM t1 WHERE a=2}
    } [list $g_chunk_size]

    do_test multiplex-2.6.6.$sz.$jmode { file size test.db } [list $g_chunk_size]

    do_test multiplex-2.6.99.$sz.$jmode {
      db close
      sqlite3_multiplex_shutdown
    } {SQLITE_OK}

  }
}

#-------------------------------------------------------------------------
# Try some tests with more than one connection to a database file. Still
# in rollback mode.
#
#   multiplex-3.1.*: Two connections to a single database file.

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