/ Check-in [497409e1]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Convert the implementation of the ".dbstat" dot-command of the command-line shell to use the sqlite_dbpage table.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | dbpage
Files: files | file ages | folders
SHA3-256:497409e167c7c025fbddc319b4fa9a8b965f70d05ac88c060dee469f70321388
User & Date: drh 2017-10-11 17:51:08
Context
2017-10-11
18:00
Add new extension "checkfreelist", which uses sqlite_dbpage to check that there are no invalid entries on the database free-list. check-in: 21930ef5 user: dan tags: dbpage
17:51
Convert the implementation of the ".dbstat" dot-command of the command-line shell to use the sqlite_dbpage table. check-in: 497409e1 user: drh tags: dbpage
17:13
Enable sqlite_dbpage and dbstat virtual tables in the shell, by default. check-in: 01bf856c user: drh tags: dbpage
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/shell.c.

4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976

4977
4978
4979
4980
4981
4982
4983

4984
4985



4986

4987
4988
4989
4990
4991
4992
4993
     { "number of triggers:",
       "SELECT count(*) FROM %s WHERE type='trigger'" },
     { "number of views:",
       "SELECT count(*) FROM %s WHERE type='view'" },
     { "schema size:",
       "SELECT total(length(sql)) FROM %s" },
  };
  sqlite3_file *pFile = 0;
  int i;
  char *zSchemaTab;
  char *zDb = nArg>=2 ? azArg[1] : "main";

  unsigned char aHdr[100];
  open_db(p, 0);
  if( p->db==0 ) return 1;
  sqlite3_file_control(p->db, zDb, SQLITE_FCNTL_FILE_POINTER, &pFile);
  if( pFile==0 || pFile->pMethods==0 || pFile->pMethods->xRead==0 ){
    return 1;
  }

  i = pFile->pMethods->xRead(pFile, aHdr, 100, 0);
  if( i!=SQLITE_OK ){



    raw_printf(stderr, "unable to read database header\n");

    return 1;
  }
  i = get2byteInt(aHdr+16);
  if( i==1 ) i = 65536;
  utf8_printf(p->out, "%-20s %d\n", "database page size:", i);
  utf8_printf(p->out, "%-20s %d\n", "write format:", aHdr[18]);
  utf8_printf(p->out, "%-20s %d\n", "read format:", aHdr[19]);







<



>



|
|
|
<
>
|
|
>
>
>

>







4966
4967
4968
4969
4970
4971
4972

4973
4974
4975
4976
4977
4978
4979
4980
4981
4982

4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
     { "number of triggers:",
       "SELECT count(*) FROM %s WHERE type='trigger'" },
     { "number of views:",
       "SELECT count(*) FROM %s WHERE type='view'" },
     { "schema size:",
       "SELECT total(length(sql)) FROM %s" },
  };

  int i;
  char *zSchemaTab;
  char *zDb = nArg>=2 ? azArg[1] : "main";
  sqlite3_stmt *pStmt = 0;
  unsigned char aHdr[100];
  open_db(p, 0);
  if( p->db==0 ) return 1;
  sqlite3_prepare_v2(p->db,"SELECT data FROM sqlite_dbpage(?1) WHERE pgno=1",
                     -1, &pStmt, 0);
  sqlite3_bind_text(pStmt, 1, zDb, -1, SQLITE_STATIC);

  if( sqlite3_step(pStmt)==SQLITE_ROW
   && sqlite3_column_bytes(pStmt,0)>100
  ){
    memcpy(aHdr, sqlite3_column_blob(pStmt,0), 100);
    sqlite3_finalize(pStmt);
  }else{
    raw_printf(stderr, "unable to read database header\n");
    sqlite3_finalize(pStmt);
    return 1;
  }
  i = get2byteInt(aHdr+16);
  if( i==1 ) i = 65536;
  utf8_printf(p->out, "%-20s %d\n", "database page size:", i);
  utf8_printf(p->out, "%-20s %d\n", "write format:", aHdr[18]);
  utf8_printf(p->out, "%-20s %d\n", "read format:", aHdr[19]);

Changes to src/shell.c.in.

3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616

3617
3618
3619
3620
3621
3622
3623

3624
3625



3626

3627
3628
3629
3630
3631
3632
3633
     { "number of triggers:",
       "SELECT count(*) FROM %s WHERE type='trigger'" },
     { "number of views:",
       "SELECT count(*) FROM %s WHERE type='view'" },
     { "schema size:",
       "SELECT total(length(sql)) FROM %s" },
  };
  sqlite3_file *pFile = 0;
  int i;
  char *zSchemaTab;
  char *zDb = nArg>=2 ? azArg[1] : "main";

  unsigned char aHdr[100];
  open_db(p, 0);
  if( p->db==0 ) return 1;
  sqlite3_file_control(p->db, zDb, SQLITE_FCNTL_FILE_POINTER, &pFile);
  if( pFile==0 || pFile->pMethods==0 || pFile->pMethods->xRead==0 ){
    return 1;
  }

  i = pFile->pMethods->xRead(pFile, aHdr, 100, 0);
  if( i!=SQLITE_OK ){



    raw_printf(stderr, "unable to read database header\n");

    return 1;
  }
  i = get2byteInt(aHdr+16);
  if( i==1 ) i = 65536;
  utf8_printf(p->out, "%-20s %d\n", "database page size:", i);
  utf8_printf(p->out, "%-20s %d\n", "write format:", aHdr[18]);
  utf8_printf(p->out, "%-20s %d\n", "read format:", aHdr[19]);







<



>



|
|
|
<
>
|
|
>
>
>

>







3606
3607
3608
3609
3610
3611
3612

3613
3614
3615
3616
3617
3618
3619
3620
3621
3622

3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
     { "number of triggers:",
       "SELECT count(*) FROM %s WHERE type='trigger'" },
     { "number of views:",
       "SELECT count(*) FROM %s WHERE type='view'" },
     { "schema size:",
       "SELECT total(length(sql)) FROM %s" },
  };

  int i;
  char *zSchemaTab;
  char *zDb = nArg>=2 ? azArg[1] : "main";
  sqlite3_stmt *pStmt = 0;
  unsigned char aHdr[100];
  open_db(p, 0);
  if( p->db==0 ) return 1;
  sqlite3_prepare_v2(p->db,"SELECT data FROM sqlite_dbpage(?1) WHERE pgno=1",
                     -1, &pStmt, 0);
  sqlite3_bind_text(pStmt, 1, zDb, -1, SQLITE_STATIC);

  if( sqlite3_step(pStmt)==SQLITE_ROW
   && sqlite3_column_bytes(pStmt,0)>100
  ){
    memcpy(aHdr, sqlite3_column_blob(pStmt,0), 100);
    sqlite3_finalize(pStmt);
  }else{
    raw_printf(stderr, "unable to read database header\n");
    sqlite3_finalize(pStmt);
    return 1;
  }
  i = get2byteInt(aHdr+16);
  if( i==1 ) i = 65536;
  utf8_printf(p->out, "%-20s %d\n", "database page size:", i);
  utf8_printf(p->out, "%-20s %d\n", "write format:", aHdr[18]);
  utf8_printf(p->out, "%-20s %d\n", "read format:", aHdr[19]);