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2014-06-30

how-to create mysql table with all datatypes

/* Create Table Example 1. */
CREATE TABLE TableWithAllTypes (
col_boolean       BOOL,                 -- boolean
col_byte          TINYINT,              -- byte
col_short         SMALLINT,             -- short
col_int           INTEGER,              -- int
col_long          BIGINT,               -- long
col_float         FLOAT,                -- float
col_double        DOUBLE PRECISION,     -- double
col_bigdecimal    DECIMAL(13,0),        -- BigDecimal
col_string        VARCHAR(254),         -- String
col_date          DATE,                 -- Date
col_time          TIME,                 -- Time
col_timestamp     TIMESTAMP,            -- Timestamp
col_asciistream1  TINYTEXT,             -- Clob ( 2^8 bytes)
col_asciistream2  TEXT,                 -- Clob ( 2^16 bytes)
col_asciistream3  MEDIUMTEXT,           -- Clob (2^24 bytes)
col_asciistream4  LONGTEXT,             -- Clob ( 2^32 bytes)
col_blob1         TINYBLOB,             -- Blob ( 2^8 bytes)
col_blob2         BLOB,                 -- Blob ( 2^16 bytes)
col_blob3         MEDIUMBLOB,           -- Blob ( 2^24 bytes)
col_blob4         LONGBLOB              -- Blob ( 2^32 bytes)
);
 
show tables like 'TableWithAllTypes' ;

2014-06-24

how-to deal with file paths with spaces from file paths containing list files


# answer : imitate find $dir -print0 - turn the new lines into nulls 
cat $include_file | perl -ne 's|\n|\000|g;print'| xargs -0 zip $zip_file

2014-06-21

how-to perform upsert from excel to mysql with perl

    use Spreadsheet::XLSX;
    use Text::Iconv;
    
    
    
    #
    # -----------------------------------------------------------------------------
    # runs the insert sql by passed data part 
    # by convention is assumed that the first column is unique and update could 
    # be performed on it ... should there be duplicates the update should fail
    # -----------------------------------------------------------------------------
    sub RunUpsertSql {
    
       my $self         = shift ; 
       my $table_name   = shift ; 
       my $refHeaders   = shift ; 
       my $refData      = shift ; 
       my $data_str     = '' ; 
       my @headers      = @$refHeaders ; 
       my @data         = @$refData ; 
    
       print ( "\@data : @data" ) ; 
       print ( "\@headers: @headers" ) ; 
    
       my $sql_str = " INSERT INTO $table_name " ; 
       $sql_str   .= '(' ; 
       for ( $i=0; $i<scalar (@headers);$i++ ) {
          $sql_str .= " $headers[$i] " . ' , ' ; 
    
       } #eof for
    
       for (1..3) { chop ( $sql_str) } ; 
       $sql_str   .= ')' ; 
    
       foreach my $cellValue ( @data ) {
          # replace the ' chars with \'
          $cellValue       =~ s|\'|\\\'|g ; 
          $data_str .= "'" . "$cellValue" . "' , " ; 
       }
       #eof foreach ' replacement
    
       # remove the " , " at the end 
       for (1..3) { chop ( $data_str ) } ; 
    
       $sql_str   .=  " VALUES (" . "$data_str" . ')' ; 
       $sql_str   .= ' ON DUPLICATE KEY UPDATE ' ; 
    
       for ( $i=0; $i<scalar(@headers);$i++ ) {
          $sql_str .= "$headers[$i]" . ' = ' . "'" . "$data[$i]" . "' , " ; 
       } #eof for
    
       for (1..3) { chop ( $sql_str) } ; 
    
       print ( "sql_str : $sql_str " ); 
    
       $sth = $dbh->prepare($sql_str ) ; 
       $sth->execute( );
    
    }
    #eof sub RunUpsertSql
    
    
    #
    # -----------------------------------------------------------------------------
    # walk trough the Excel and build the data part of the insert sql
    # -----------------------------------------------------------------------------
    sub ParseExcel {
    
       my $self = shift ; 
       print (  " == START == " ) ; 
       # not sure if it could work without the next line
       # for utf8 strings - slavic , japanese etc. 
       my $converter = Text::Iconv -> new ("utf-8", "utf-8");
    
       # http://search.cpan.org/~dmow/Spreadsheet-XLSX-0.13-withoutworldwriteables/lib/Spreadsheet/XLSX.pm
       my $objExcelParser = Spreadsheet::XLSX -> new ("$FileInputExcel", $converter);
    
       # iterate the sheets
       foreach my $objSheet (@{$objExcelParser-> {Worksheet}}) {
    
          return unless ( $objSheet->{'Name'} eq 'Issue' ) ; 
          print("Sheet: " . $objSheet->{'Name'});
    
          my $rowCount = 0 ; 
          # iterate the rows 
          my @headerData               = ();
          foreach my $row ($objSheet -> {'MinRow'} .. $objSheet -> {'MaxRow'}) {
             my @rowData               = (); 
             $objSheet -> {'MaxCol'} ||= $objSheet -> {'MinCol'};
    
             # iterate the coloumns
             foreach my $col ($objSheet -> {'MinCol'} ..  $objSheet -> {'MaxCol'}) {
                my $cell = $objSheet -> {'Cells'} [$row] [$col];
                if ($cell) {
                   #debug printf("( %s , %s ) => %s\n", $row, $col, $cell -> {'Val'});
                   # the unformatted value
                   #my $cellValue = $cell->{'Val'}  ; 
                   # push the formatted value
                   push ( @rowData , $cell->value() )       if $rowCount != 0 ; 
                   push ( @headerData , $cell->value() )    if $rowCount == 0 ; 
    
                }  #eof if the cell is defined
             } 
             #eof foreach col
          # by convention the name of the xls sheet is the same as the table name
          $self->RunUpsertSql ( $objSheet->{'Name'} , \@headerData , \@rowData) 
             if $rowCount != 0 ; 
    
             $rowCount++ ; 
          }
          #eof foreach row
    
       } 
       #eof foreach $objSheet
    
       print (  " == STOP  == " ) ; 
    
    } #eof sub ParseExcel
    

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