SQLite

  } elseif {$file_to_analyze!=""} {
    usage
  } else {
    set file_to_analyze $arg
  }
}
if {$file_to_analyze==""} usage
set root_filename $file_to_analyze
regexp {^file:(//)?([^?]*)} $file_to_analyze all x1 root_filename
if {![file exists $file_to_analyze]} {
  puts stderr "No such file: $file_to_analyze"
if {![file exists $root_filename]} {
  puts stderr "No such file: $root_filename"
  exit 1
}
if {![file readable $file_to_analyze]} {
  puts stderr "File is not readable: $file_to_analyze"
if {![file readable $root_filename]} {
  puts stderr "File is not readable: $root_filename"
  exit 1
}
set true_file_size [file size $file_to_analyze]
set true_file_size [file size $root_filename]
if {$true_file_size<512} {
  puts stderr "Empty or malformed database: $file_to_analyze"
  puts stderr "Empty or malformed database: $root_filename"
  exit 1
}

# Compute the total file size assuming test_multiplexor is being used.
# Assume that SQLITE_ENABLE_8_3_NAMES might be enabled
#
set extension [file extension $file_to_analyze]
set pattern $file_to_analyze
set extension [file extension $root_filename]
set pattern $root_filename
append pattern {[0-3][0-9][0-9]}
foreach f [glob -nocomplain $pattern] {
  incr true_file_size [file size $f]
  set extension {}
}
if {[string length $extension]>=2 && [string length $extension]<=4} {
  set pattern [file rootname $file_to_analyze]
  set pattern [file rootname $root_filename]
  append pattern {.[0-3][0-9][0-9]}
  foreach f [glob -nocomplain $pattern] {
    incr true_file_size [file size $f]
  }
}

# Open the database
#
sqlite3 db $file_to_analyze
if {[catch {sqlite3 db $file_to_analyze -uri 1} msg]} {
  puts stderr "error trying to open $file_to_analyze: $msg"
  exit 1
}
register_dbstat_vtab db

db eval {SELECT count(*) FROM sqlite_master}
set pageSize [expr {wide([db one {PRAGMA page_size}])}]

if {$flags(-pageinfo)} {
  db eval {CREATE VIRTUAL TABLE temp.stat USING dbstat}

# set total_payload [mem eval "SELECT sum(payload) FROM space_used"]
set user_payload [mem one {SELECT int(sum(payload)) FROM space_used
     WHERE NOT is_index AND name NOT LIKE 'sqlite_master'}]
set user_percent [percent $user_payload $file_bytes]

# Output the summary statistics calculated above.
#
puts "/** Disk-Space Utilization Report For $file_to_analyze"
puts "/** Disk-Space Utilization Report For $root_filename"
catch {
  puts "*** As of [clock format [clock seconds] -format {%Y-%b-%d %H:%M:%S}]"
}
puts ""
statline {Page size in bytes} $pageSize
statline {Pages in the whole file (measured)} $file_pgcnt
statline {Pages in the whole file (calculated)} $file_pgcnt2