pt_table_checksum

Summary

pt_table_checksum
Variables
$checksum_table_data
$fetch_sth
$update_sth
$savesince_sth
$crc_wid
$md5sum_fmt
$already_checksummed
%tables_to_checksum
Functions
main
get_all_tbls_info
is_oversize_chunk	Determine if the chunk is oversize.
is_chunkable_table	Determine if the table is chunkable.
_explain	EXPLAIN a chunk or table.

Variables

$checksum_table_data

my $checksum_table_data

$fetch_sth

my $fetch_sth

$update_sth

my $update_sth

$savesince_sth

my $savesince_sth

$crc_wid

my $crc_wid

$md5sum_fmt

my $md5sum_fmt

$already_checksummed

my $already_checksummed

%tables_to_checksum

my %tables_to_checksum

Functions

main

sub main

get_all_tbls_info

sub get_all_tbls_info

is_oversize_chunk

Determine if the chunk is oversize.

Parameters

%args

Arguments

Required Arguments

dbh - dbh
db - db name, not quoted
tbl - tbl name, not quoted
chunk_size - chunk size in number of rows
chunk - chunk, e.g. “`a` > 10”
limit - oversize if rows > factor * chunk_size
Quoter - Quoter object

Optional Arguments

where - Arrayref of WHERE clauses added to chunk
index_hint - FORCE INDEX clause

Returns

True if EXPLAIN rows is >= chunk_size * limit, else false

is_chunkable_table

Determine if the table is chunkable.

Parameters

%args

Arguments

Required Arguments

dbh - dbh
db - db name, not quoted
tbl - tbl name, not quoted
chunk_size - chunk size in number of rows
Quoter - Quoter object

Optional Arguments

where - Arrayref of WHERE clauses added to chunk
index_hint - FORCE INDEX clause

Returns

True if EXPLAIN rows is <= chunk_size, else false

_explain

EXPLAIN a chunk or table.

Parameters

%args

Arguments

Required Arguments

dbh - dbh
db - db name, not quoted
tbl - tbl name, not quoted
Quoter - Quoter object

Optional Arguments

where - Arrayref of WHERE clauses added to chunk
index_hint - FORCE INDEX clause

Returns

Hashref of first EXPLAIN row