Re^8: using system command in regex

Hey Programatic you are also doing the same but you are passing all the column names once by using join & map. Good thought. But in place holders If i place table name its showing a error.

DBD::mysql::st execute failed: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''CDR' where Date = '13-10-2015' and Hour like '00:%'' at line 1 at DB_Test.pl line 25.

So I replaced my '?' with table name. Then its working good. Even though I used your logic I need to maintain all my column names in array. I want to change that. Here I am writing all columns in program into big arrays which is looking odd. Can I get that coloumn names from db???

Sample (Tested)

#!/usr/bin/perl
use strict;
use warnings;

use DBI;
my $db_date=$ARGV[0]; #04-10-2015

my $hour = "00";
my $db_name   = "ravi";
my $table_name = "CDR";
my $host      = "xxx.xx.x.xxx";

my @CDR_array = ("Total_MO","Total_MO_sucess","MO_userdep_error","MO_s
+ubcrib_error","MO_system_error","Total_MO_success_rate","Total_AO","T
+otal_AO_sucess","AO_userdep_error","AO_subcrib_error","AO_system_erro
+r","Total_AO_success_rate","Total_MT_P2P","Total_MT_sucess_P2P","MT_P
+2P_userdep_error","MT_P2P_subcrib_error","MT_P2P_system_error","Total
+_MT_P2P_success_rate","Total_MT_A2P","Total_MT_sucess_A2P","MT_A2P_us
+erdep_error","MT_A2P_subcrib_error","MT_A2P_system_error","Total_MT_A
+2P_success_rate","Total_AT","Total_AT_sucess","AT_ESMEdep_error","AT_
+network_error","AT_system_error","Total_AT_success_rate","P2P_FDA_cou
+nt","P2P_FDA_success_count","P2P_FDA_success_rate","A2P_FDA_count","A
+2P_FDA_success_count","A2P_FDA_success_rate","Total_Count","Total_TPS
+","Greatest_TPS");

my $dbh = DBI->connect("DBI:mysql:database=$db_name;host=$host;mysql_s
+ocket=/opt/lampstack-5.5.27-0/mysql/tmp/mysql.sock","root","",{'Raise
+Error' => 1});

my $sql = "select ".join ",", map { "sum($_)" } @CDR_array;
$sql .= " from CDR where Date = ? and Hour like ?";

my $sth = $dbh->prepare( $sql ) or die "Cant get prepare";
$sth->execute($db_date, "$hour:%") or die $DBI::errstr;

my @my_array = $sth->fetchrow_array();

print $my_array[1],$/;
print @my_array,$/;
[download]

Comment on Re^8: using system command in regex Select or Download Code

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Re^9: using system command in regex by shmem (Chancellor) on Oct 16, 2015 at 07:27 UTC
Can I get that coloumn names from db??? You can get table and column names from the db using queries: `my (@tables, %map); my $q = $dbh->prepare("show tables"); $q->execute or die "Error listing tables"; while ( my ($table) = $q->fetchrow_array ) { push @tables, $table; } $q->finish; for my $table (@tables) { $q = $dbh->prepare("describe $table"); $q->execute or die "Error describing table $table"; while ( my $hr = $q->fetchrow_hashref ) { push @{ $map{$table} }, $hr->{Field}; } $q->finish; }` [download] Now you have a hash `%map` keyed on table names, whose values are anonymous arrays containing column names. Use this array to build your query: `my $table_name = "CDR"; my $sql = "select ".join ",", map { "sum($_)" } @{$map{$table_name}}; $sql .= " from $table_name where Date = ? and Hour like ?";` [download] perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'	[reply] [d/l] [select]
Re^10: using system command in regex by ravi45722 (Pilgrim) on Oct 16, 2015 at 09:50 UTC
Sorry. Its my mistake to not saying for you clearly. Here if I am using join & map its returning all the sum of the columns. but I have percentages in the middle. The percentages also adding and its returning like "590.04%". After seeing this result I changed my program to my $sql = "select sum(Total_MO),sum(Total_MO_sucess),sum(MO_userdep_er +ror),sum(MO_subcrib_error),sum(MO_system_error),sum(Total_MO_success_ +rate)/(select count(Total_MO_success_rate) from CDR where Date = '13- +10-2015' and Hour like '00:%'),sum(Total_AO),sum(Total_AO_sucess),sum +(AO_userdep_error),sum(AO_subcrib_error),sum(AO_system_error),sum(Tot +al_AO_success_rate)/(select count(Total_AO_success_rate) from CDR whe +re Date = '13-10-2015' and Hour like '00:%'),sum(Total_MT_P2P),sum(To +tal_MT_sucess_P2P),sum(MT_P2P_userdep_error),sum(MT_P2P_subcrib_error +),sum(MT_P2P_system_error),sum(Total_MT_P2P_success_rate)/(select cou +nt(Total_AO_success_rate) from CDR where Date = '13-10-2015' and Hour + like '00:%'),sum(Total_MT_A2P),sum(Total_MT_sucess_A2P),sum(MT_A2P_u +serdep_error),sum(MT_A2P_subcrib_error),sum(MT_A2P_system_error),sum( +Total_MT_A2P_success_rate)/(select count(Total_AO_success_rate) from +CDR where Date = '13-10-2015' and Hour like '00:%'),sum(Total_AT),sum +(Total_AT_sucess),sum(AT_ESMEdep_error),sum(AT_network_error),sum(AT_ +system_error),sum(Total_AT_success_rate)/(select count(Total_AO_succe +ss_rate) from CDR where Date = '13-10-2015' and Hour like '00:%'),sum +(P2P_FDA_count),sum(P2P_FDA_success_count),sum(P2P_FDA_success_rate)/ +(select count(Total_AO_success_rate) from CDR where Date = '13-10-201 +5' and Hour like '00:%'),sum(A2P_FDA_count),sum(A2P_FDA_success_count +),sum(A2P_FDA_success_rate)/(select count(Total_AO_success_rate) from + CDR where Date = '13-10-2015' and Hour like '00:%'),sum(Total_Count) +,sum(Total_TPS),max(Greatest_TPS) from CDR where Date = ? and Hour li +ke ?"; foreach my $hour ("00","01","02","03","04","05","06","07","08","09",10 +..23) { $sth->execute($date, "$hour:%") or die $DBI::errstr; my @my_array = (); push(@my_array,$hour); push(@my_array,$sth->fetchrow_array()); my $col = 0; print @my_array,$/; foreach my $value (@my_array) { $sheet->AddCell( $row, $col, $value ); ++$col; } $row++; } [download] Its too ugly I know. But have a look. Here I have Percentages & the last column is Greatest tps. To achieve this `sum(A2P_FDA_success_rate)/(select count(Total_AO_success_rate) from CD +R where Date = '13-10-2015' and Hour like '00:%') max(Greatest_TPS)` [download] I need to write like this. Now show me a shortcut please.	[reply] [d/l] [select]