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Man Pages


Manual Reference Pages  -  DBIWRAPPER (3)

.ds Aq ’

NAME

DBIWrapper - Perl extension for generic DBI database access.

CONTENTS

SYNOPSIS



  use DBIWrapper;
  my $db = DBIWrapper->new(dbType => "Pg",
                           dbName => "test_db",
                           dbHost => "localhost",
                           dbUser => "nobody",
                           dbPasswd => "",
                           dbPort => "5432",
                           predefinedDSN => "",
                           printError => 1,
                           raiseError => 1,
                           autoCommit => 0);
  if ($db->error())
  {
    die $db->errorMessage();
  }

  my $sth = $db->read("SELECT * FROM test_tb");
  my $result = $db->write(sql => "INSERT INTO test_tb (name, value) VALUES (?, ?)",
    plug => [ $name, $value ]);
  # this used DBIs substitution features to plugin the name and value.

  $db->close();  # close down the database connection.  Any read()s
  # or write()s will no longer be valid with this object until a new() is
  # issued again.



DESCRIPTION

DBIWrapper is the generic database Object for accessing the DBI database interface. It provides the lowest level of functionality needed by any program wanting to access databases via the DBI. Currently, DBIWrapper is only aware of Pg (PostgreSQL), mysql (MySQL), Sybase and ODBC DBD modules and how to work with them correctly.

Support for transactions on MySQL is now checked for and if found to be available, the AutoCommit flag is turned off so that transactions will be used.

The substitution array (if used) will cause each ##?1##, ##?2##, etc. string in the sql string to be substituted for the corresponding value in the substitution array. It must start at ?1. It is up to the user to pass in the correct number of elements for both the plug and substitution arrays. The plug array is used to pass in the values for DBI to replace in the sql string of ? which is standard DBI notation.

DATABASE VERSION INFO The version info for the database in use, if determinable, is now stored as: <B>serverVersionB> = complete version string Ex: on Debian, PostgreSQL returns 8.1.0 MySQL returns 4.1.11-Debian_4sarge5-log

<B>serverVerMajorB> = The Major release number From the previous examples, PostgreSQL would be 8, MySQL would be 4.

<B>serverVerMinorB> = The Minor release number From the previous examples, PostgreSQL would be 1, MySQL would be 1.

<B>serverVerReleaseB> = The Point release number. This does not include any text after the point release value that may be included by the distro. From the previous examples, PostgreSQL would be 0, MySQL would be 11.

The stored database version info is used to determine if we can still do oid based lastID lookups in PostgreSQL or if we have to do something that doesn’t depend on the oid since PostgreSQL <B>8.1B> no longer enables oids by default.

Sybase NOTES

The getDataArray(), getDataArrayHeader(), getDataHash(), getDataHashHeader(), readXML(), readHTML() methods all properly handle multiple result sets being returned from Sybase. This could be the result of multiple select statements or a compute clause. In the case of the Header() methods, the header row is based on the first returned select statement, which may not be correct for the following statements or compute blocks.

Deadlock Detection NOTES

Initial support for detecting a deadlock scenario when using Sybase is now implemented. The code will attempt to retry the sql in question, either a read or write call, upto deadlockNumTries tries and sleeping for deadlockSleep seconds between tries. If deadlockRampSleep is enabled, which it is not by default, then we multiply the deadlockSleep by the current try #, if > 1, thus sleeping in multiples of deadlockSleep seconds.

There are currently no helper methods to change the values, but you can just assign new values to the dbObj instance you create as they are encapsulated within the object. The only thing that is not encapsulated is the deadlockEncountered global variable, due to the way the DBI error handler is defined. You should not have to touch this variable unless you wanted to know if a deadlock had been detected in your last read()/write() command. It is reset to false whenever a read()/write() is issued.

Exported FUNCTIONS

<B>NOTEB>: bool = 1(true), 0(false)
scalar new(dbType, dbName, dbHost, dbUser, dbPasswd, dbPort, printError, raiseError, autoCommit, predefinedDSN, setDateStyle, logLevel, server, interfaces)


 Creates a new instance of the DBIWrapper object and opens
 a connection to the specified database.  If predefinedDSN is
 specified then it is used instead of the dbName, dbHost, dbPort
 values.  This is mainly to support ODBC easier.
 If setDateStyle is 1 (default) and dbType = Pg, then the datestyle
 for PostgreSQL is set to US (MM/DD/YYYY).
 logLevel defaults to 0.  There are 4 levels 0, 1, 2 and 3 which log
 the following items when an error occurs:
 0) Nothing is output
 1) dbType, dbHost, dbName, printError, raiseError, autoCommit,
   setDateStyle, supportsTransactions, transactionType, server,
   interfaces
 2) all of 1 plus dbUser, dbPort, predefinedDSN
 3) all of 2 plus dbPasswd

 Sybase specific:
 server allows you to specify the database server to connect to by name
   and must be defined in your interfaces file.
 interfaces allows you to specify the Sybase interfaces file needed
   to properly connect to the Sybase database.

 If you do not specify server and interfaces, then dbHost and dbPort
 will be used.



bool isValid()


 Returns 1 if the DBI object is valid, else 0 if invalid.



void close()


  Closes the connection to the database.



bool error(errorString)


 This method will set the error condition if an argument is
 specified.

 The current error state is returned, regardless of if we are
 setting an error or not.

 A \n is appended to the errorString so you dont have to provide it.
 errorString is prefixed with the callers full method name followed
 by the errorPhrase string.

 You can either specify the errorString value by name:

 $self->error(errorString => "This is an error!");

 or by value:

 $self->error("This is an error!");

 If you specify multiple arguments (in pass by value mode), then
 we check to see if the first argument contains %s that are not
 \ escaped and are not %%.  If this is the case, then the incoming
 arguments will be passed through sprintf() for formatting, else we
 just join them with a space   and append them to the current
 errorString.


 To see if an error happened:

 if ($self->error) { die "Error: " . $self->errorMessage; }



void setError(errorString)


 DEPRECATED: see error()

 optional: errorString
 returns: nothing
 Sets error = 1 and errorString = string passed in.
 The errorString is prefixed with the callers full
 method name followed by the errorPhrase string.

 You can either call as
 setError(errorString => $string)
 or setError($string)

 If you do not specify anything, we blow an error
 telling you to specify errorString.

 \n is appended to the contents of the errorString
 passed in.



void prefixError(errorString)


 optional: errorString
 returns: nothing
 Sets error = 1 and prefixes errorString with string passed in.
 The errorString is prefixed with the callers full
 method name followed by the errorPhrase string.

 You can either specify the errorString value by name:

 $self->prefixError(errorString => "This is an error!");

 or by value:

 $self->prefixError("This is an error!");

 If you specify multiple arguments (in pass by value mode), then
 we check to see if the first argument contains %s that are not
 \ escaped and are not %%.  If this is the case, then the incoming
 arguments will be passed through sprintf() for formatting, else we
 just join them with a space   and append them to the current
 errorString.


 If you dont specify anything then
   If you have a previous error, we prefix the caller info to
     that error message.



scalar didErrorOccur(void)


 DEPRECATED: see error()

 Returns the value of error.



scalar errorMessage(void)


 Returns the value of errorString.



scalar errorStr(void)


 Returns the value of errorString.

 Alternative to errorMessage().



void resetError(void)


 Resets the error condition flag and string.



void commit()


 causes the database to commit the current transaction.  Only works
 if AutoCommit is set to 0 and the database supports Transactions.



void rollback()


 causes the database to rollback the current transaction.  Only
 works if AutoCommit is set to 0 and the database supports
 Transactions.



ref read(sql => ‘‘’’, plug => [], substitute => [])


 (This function should only be called for SELECT statements).
 executes the specified sql statement passing in any values in plug
 to the execute method after doing any substitutions that are in
 substitute.  The resulting sql data is passed back to the user as a
 reference for them to do with as they please.



@ getDataArray(sql, plug, substitute)


 requires: sql
 optional: plug, substitute
 returns: array of arrayrefs as the result of
   $sth->fetchall_arrayref

 See read() for argument info.



@ getDataHash(sql, plug, substitute, case)


 requires: sql
 optional: plug, substitute, case
 returns: array of hashrefs where the column names are
   case preserved if case = 1, or lowercased if case = 0.

 case defaults to 0 (lowercase).

 See read() for argument info.



@ getDataArrayHeader(sql, plug, substitute, case)


 requires: sql
 optional: plug, substitute, case
 returns: array of arrayrefs

   The first row of the array is an array containing the
   column names in the order returned by the database.
   The column names are case preserved if case = 1, or
   lowercased if case = 0.

   NOTE:
   If 0 rows were returned, we still return an array with
   1 row in it, which is the header row.

 case defaults to 0 (lowercase).

 See read() for argument info.



@ getDataHashHeader(sql, plug, substitute, case)


 requires: sql
 optional: plug, substitute, case
 returns: array of hashrefs where the column names are
   case preserved if case = 1, or lowercased if case = 0.

   The first row of the array is an array containing the
   column names in the order returned by the database.
   The column names respect the case flag.

   NOTE:
   If 0 rows were returned, we still return an array with
   1 row in it, which is the header row.

 case defaults to 0 (lowercase).

 See read() for argument info.



scalar readXML(sql, plug, substitute, columns, displayNULLAs, ignoreTags, sequence, displaySQL)


 requires: sql
 optional: plug, substitute, columns = 0, displayNULLAs, ignoreTags,
           sequence, displaySQL = 1
 returns:  valid XML document describing the data selected from the
  database.  Uses getDataHashHeader() to actually validate the data and
  execute the SELECT statement.  The resulting XML document
  will either have an error condition set (if read() signaled
  an error occured) or will be the result of traversing the
  data returned from getDataHashHeader().

  If displaySQL = 0, then we do not output the <select />
  tag in the xml, thus allowing you to send the xml to a web browser
  without potentially giving out sensitive information.

  Any undefined values (NULL) will be output using the displayNULLAs
  variable which defaults to NULL.

  All values are run through the formEncodeString() method to
  make sure that any html/xml tags are properly encoded.  If you
  do not want certain tags encoded, use the ignoreTags and/or
  sequence arguments to affect how the formEncodeString() method
  fixes up the value.  See the formEncodeString() documentation for
  more details.

  If columns = 0, then all info will be returned in the <row>
  tag as attributes where the column name = column value.
  Ex.  <row name="test" value="testing" other="something else"/>
  When the column names were name, value and other.

  If columns = 1, then all info will be returned in <column>
  tags which are children of the <row> tag.  A column tag has
  attributes name and value.  name = column name and value =
  column value.
  Ex.
  <row>
    <column name="name" value="test"/>
    <column name="value" value="testing"/>
  </row>

  If columns = 2, then each row has tags defined named after the
  column with the contents being the value.  They are output in the
  order that the database returned them in.  The column value is not
  encoded, but is wrapped in <![CDATA[ ]]> tags so that any html/xml
  tags are safely ignored without having to be encoded.
  Ex:
  <row>
    <name><![CDATA[test]]></name>
    <value><![CDATA[testing]]></value>
  </row>

  Where there were 2 columns returned with names of name and value, in
  that order.

  The XML format is as follows:
  <?xml version="1.0" encoding="ISO-8859-1"?>
  <resultset version="1.2">
    <select sql="" plug=""/>
    <status result="" error=""/>
    <rows numRows="" columns="0|1|2">
      <row/>
    </rows>
  </resultset>

  If the XML document is an error document, then:
  <status result="Error" error="Error message"/>
  else
  <status result="Ok" error=""/>

  In <select> tag, sql = The sql SELECT string, plug = the
  string made when joining all the plug array entries
  together and comma seperating them.  The entries are
  single quoted.  Ex. plug="" would represent no plug
  entries used.  plug="x, y" would mean that 2 entries
  were passed in: x, y.

  In <rows> numRows will be equal to the number of rows
  being returned or 0 if an error had occured.

  The <row> tag will depend on the value of columns.



scalar fixupAttributes(string) Attempts to make sure that the given string can be a valid attribute in an xml document.

Converts (, ), -, \, /, =, >, <, & to _ Deletes ’, ", \n

scalar readHTML(sql, plug, substitute, tableClass, alternateRows, displayNumRows, displayNULLAs, ignoreTags, sequence, headers, footer)


 requires: sql
 optional: plug, substitute, tableClass, alternateRows,
  displayNumRows, displayNULLAs, ignoreTags, sequence, headers, footer
 returns:  valid HTML <table> describing the data selected from the
  database.  Uses getDataHashHeader() to actually validate the data and
  execute the SELECT statement.  The resulting HTML <table>
  will either have the error displayed (if read() signaled
  an error occured) or will be the result of traversing the
  data returned from getDataHashHeader().

  Any undefined values (NULL) will be output using the displayNULLAs
  variable which defaults to NULL.

  All values are run through the formEncodeString() method to
  make sure that any html/xml tags are properly encoded.  If you
  do not want certain tags encoded, use the ignoreTags and/or
  sequence arguments to affect how the formEncodeString() method
  fixes up the value.  See the formEncodeString() documentation for
  more details.

 If an error occured, then the generated tr and td will have
 class="sqlError" assigned to them so you can change the way the
 sql Error row is displayed.  The error output will also be
 wrapped in a <span class="sqlError"></span> so you can change
 the display behaviour.

 tableClass defines the class to assign to this table so it knows
 how to display itself.  Defaults to "".  This allows you to have
 different readHTML generated tables on the same page and let them
 look different (border, width, cellspacing, cellpadding, etc.).

 alternateRows (boolean) lets the caller indicate they want to
 possibly have different row characteristics on every other row.
 Defaults to 1.

 displayNumRows (boolean) lets the caller indicate they want a <div>
 above the generated table that tells the user how many rows were
 returned.  Defaults to 1.  The generated div has
 class="sqlNumRows" assigned to it so the caller can affect the
 characteristics of the output and the NumRows statement is wrapped
 in a <span class="sqlNumRows"></span>.

 The table header will be made up from the returned columns in the
 sql statement.  Each <th> will have the css class="column_name"
 defined so that the callers style can have th.column_name defined
 to dictate how the <th> is to be displayed.  The <tr> for the table
 header will have class="sqlHeader" assigned to it.  **

 The headings can be specified by passing in a reference to a hash
 called headers.  If you wish to use special characters and/or
 simply change the label for a column that was used in the SQL assign
 it to the hash entry with the column as key.
   $headers{column1} = "Some other text";
   readHTML(headers => \%headers);
 Any columns not specified in the hash will default to the name used
 in the sql query.

 The footer flag is boolean (0|1) and defaults to 0.  If set to 1 the
 heading row will be duplicated as a footer row inside of <tfoot> tags.

 Each <tr> will have class="sqlRow" assigned, unless alternateRows
 is enabled, which then causes the even rows to have
 class="sqlRow sqlEven" and the odd rows to have class="sqlRow sqlOdd"
 assigned. Each <td> will have the css class="column_name" defined so
 the callers style can have td.column_name defined to dictate how the
 <td> is to be displayed. The contents of the <td> entry will be
 wrapped in <span class="column_name"></span> to allow even more
 display control.  **

 ** The column_name is run through the fixupAttributes()
 method to remove any bad values and convert all illegal css
 characters in a name to _.  You should run your column names
 through the fixupAttributes() method to have the same class
 name to work with.



scalar readCSV(sql =>, plug =>, quote =>, quoteAll =>, delimeter =>, sep =>, header =>, computeRowHeader =>, case => ) or readCSV(’SELECT foo FROM bar’)


  This returns the data selected in sql query in comma separated value
  format.  Returns undef if an error occured.

  Optional parameters:
  sep - defaults to , , but can be whatever you want to seperate fields
    with.
  header - (boolean) defaults to 0.  If 1 (true), then we output the
    column names as the first line of the output.  If using Sybase and
    COMPUTE rows, then at each detected compute row, we output the
    compute rows headers before the compute rows data and prefix the
    compute row headers with (!!COMPUTE ROW!!).  This is so scripts
    can detect a compute row and handle accordingly.
  computeRowHeader - (boolean) defaults to 1. determines if the string
    (!!COMPUTE ROW!!) should be prefixed to compute row headers
    if using Sybase and header => 1.
  case - (boolean) defaults to 0.  If 1 then we preserve the case for
    column names in the header row.  If 0 then we lowercase all column
    names in the header row.
  quote - defaults to single quotes.  will escape any found in data with
    backslash.
  quoteAll - (boolean) defaults to 1.  If 1 (true), then all data is
    quoted using the quote value.  If 0 (false), then only those fields
    detected to be non-numeric are quoted.
  delimeter - defaults to newline (\n).  Will escape any found in data
    with backslash (\\n)



@ readSpreadSheet(sql =>, plug =>, case =>, sheetName =>, formats => {}, returnFile =>, workbook => )
@ readSpreadSheet(’SELECT foo FROM bar’)


  This returns the data selected in sql query in a Excel(R) SpreadSheet.
  NOTE:  You must call binmode() on whatever file handle you are
  planning on printing the results to.  This is an IO::Scalar instance.

  The returned array contains the following entries:
    [0] = excel spreadsheet or the Spreadsheet::WriteExcel object
    [1] = # rows of data processed
    [2] = # rows changed by callback handler
    [3] = # compute rows encountered
    [4] = # compute rows changed by callback handler

  Returns undef if an error occured.

  Optional parameters:
  returnFile - (boolean) defaults to 1.  If 1, then we return the
    spreadsheet data ready to be written to a file.
    If 0, then we return the Spreadsheet::WriteExcel object to allow
    the caller to continue modifying things or to pass back into us
    for another sheets worth of data.
  workbook - Spreadsheet::WriteExcel object to work with.
    Defaults to undef.
  case - (boolean) defaults to 0.  If 1 then we preserve the case for
    column names in the header row.  If 0 then we lowercase all column
    names in the header row.
  sheetName - defaults to "Sheet1".  Specify the name of the sheet
    being created.  If you specify workbook, then I check to make sure
    that the given sheetName has not already been created.  If it has,
    then I let the module pick the next valid name, else I use the
    name you specified.
  formats - (hash ref) defaults to {}.  Define the name of the format
    and then the attributes you want it to have, where each format
    is a hashref containing the attributes.
    Ex:  { header => { bold => 1, align => "center" },
           date => { num_format => "yyyy-mm-dd", align => "right" }
         }
    If you define an entry called header, it will be used as the
    format when displaying the header row and outputting the
    column headers, otherwise no formatting will be done.
  headers - (hash ref) defaults to {}.  Allows you to override the
    displayed name for each data column.
    Ex:  { start_date => "Start Date" }
  columnWidths - (hash ref) defaults to {}.  Allows you to specify
    which columns need a specific width set.  Only those columns
    that have an index value defined, will have their width set.
    The index value is based on the column name returned by the
    result set using the case flag to determine if it is all
    lowercase or left alone.  This allows you to re-order your
    output and still have the correct column widths defined.
    Ex:  { start_date => 35, num_users => 12, whatever => 15 }
  types - (hash ref) defaults to {}.  Allows you to specify the
    type of each column, indexed by the column name.  If you
    dont specify a type for a column, then it defaults to string.
    See columnWidths for a description of the column name index.
    The possible types are:
      string, date, time, date_time, number, url, 0number

    0number displays this field as a string, thus keeping any leading 0s.

    date appends the "T" required by excel to indicate there is no time part.

    time prepends the "T" required by excel to indicate there is no date part.

    date_time assumes you have inserted the "T" between the date and time parts,
    with no surrounding spaces, otherwise it wont display properly.

    You must also specify a format so that your date and/or time values
    display properly.

    Ex:  { start_date => "date", num_users => "number",
           whatever => "string" }

  Callback handlers:

    rowHandler - anonymous sub that will be called and passed in
      a hashref that contains the following entries:
        data - array ref with each columns value indexed from 0
        format - array ref with each columns format to be applied
        type - array ref with each columns default type
        row - int containing the current excel row # being processed.
      You can delete, modify or insert entries into each of the arrays.
      Make sure you also delete or insert the appropriate entries from
      the format and type arrays so they stay in sync with the data
      array.
      If you make changes, return the hashref, else return undef to
      indicate we should use the original values.

    computeRowHandler - callback handler that handles compute rows.
      See rowHandler for details on the input and output handling.

  CAVEATS
    If you want to run multiple sql queries and generate a seperate
    sheet per query, you must instantiate your own instance of the
    Spreadsheet::WriteExcel module and pass it in, specifying
    returnFile => 0.  You then must close() the workbook before
    trying to work with the result, otherwise you wont get any
    output as desired.

    Example:

    # instantiate my workbook instance.
    my $workbook;
    unless ($workbook = new Spreadsheet::WriteExcel("test.xls"))
    {
      die "Failed to instantiate Spreadsheet::WriteExcel instance!  $!";
    }

    # do a loop that passes in the workbook and turns off returnFile.
    .
    .
    .

    $workbook->close();



int write(sql => ‘‘’’, plug => [], substitute => [])


 (This function should be called for any sql statement other than
 SELECT).
 executes the specified sql statement passing in any values in plug
 to the execute method after doing any substitutions that are in
 substitute.

 Returns the number of rows affected.

 If the sql to execute is an INSERT statement, then the oid or
 insertid (Postgresql or MySQL) values will be stored in the
 oid value in this object, for later access by getID().



scalar getID(‘‘table.column’’) This method will attempt to return the ID value of the just INSERTed statement as implemented by MySQL, Sybase and PostgreSQL. This is assuming that you just used the write() method and that is was able to update the oid value.

This method requires a string value specifying the table.column that is the ID field for the INSERT statement that just executed, if you are using a PostgreSQL backend.

If using PostgreSQL <= 8.0, then the old oid lookup code will be run, otherwise the ID has already been looked-up in the write() method and will be returned.

If using MySQL, you do not need to specify the table.column value, but your table must have an AUTO_INCREMENT field defined.

If using Sybase, you do not need to specify the table.column value, but you may not get a valid ID back if you used ? substitution or the INSERT was in a stored procedure. See the DBD::Sybase man-page for more information.

UPDATE: At this point, I can’t reliably get this to work with Sybase, so it will always return a value of 0 until I can get this figured out. Sorry if this causes an issue.

If the database type is unsupported or an error happened, a value of 0 will be returned.

string debugMessage()


 Returns the string that contains all the info that is to be logged
 at the current logLevel level.  If logLevel is not 0, 1, 2 or 3
 then a default of 3 is used.



int getLogLevel()


 returns the current logLevel value.



int setLogLevel(logLevel => 1)


 sets the logLevel value.  If the value is not specified then it
 defaults to logLevel 1.

 Returns 1 on Success, 0 on Error.

 We validate that the logLevel is 1, 2 or 3.



string boolToDBI(string)


 Takes the string and returns a 1 for 1|t|true,
 returns a 0 for anything else.

 This method basically will output a true or false
 value that any database should recognize based upon
 the input string.



string dbiToBool(string)


 Takes the 1 or 0 from the DBI and returns
 true or false.



scalar formEncodeString(string, ignoreTags, sequence)
scalar formEncodeString(scalar)


 In scalar mode, takes the incoming string and encodes it to
 escape all <, > values as <, > unless they are \ escaped.

 To have the \ showup, you will have to do a \\ when defining this
 in perl, otherwise perl interprets the \whatever internally.

 In non-scalar mode, you specify the arguments by name.

 optional:
   string - string to encode all &, <, > characters to their html
     equivalents of &, <, >.
   ignoreTags - string of pipe (|) seperated tag names that should not
     be encoded.  Ex:  ignoreTags => "b|i|u|span" would ignore all
     <b>, </b>, <i>, </i>, <u>, </u>, <span>, </span> tags that were
     not \ escaped.
   sequence - a named set of ignoreTags values that you want used.
     If both sequence and ignoreTags are specified, the ignoreTags
     value is used.  If you want to apply multiple sequences, specify
     them in a comma delimited format.
     Ex: sequence => formatting,seperator

     available sequences are:
       formatting - "b|i|u|span|sub|sup|big|code|font|h1|h2|h3|h4|h5|h6|pre|small|strike|strong"
       block - "p|div|form"
       tables - "table|tr|td|th|tbody|tfoot|thead"
       seperator - "br|hr"
       formItems - "input|textarea|select|option"
       grouping - "ol|ul|li"

 returns: form encoded string ignoring those entries defined in
   ignoreTags or sequence and where the &, <, > was not \ escaped.

   Any &, <, > that were \ escaped will have the \ removed on output.



bool sybaseErrorHandler() returns 0 if the error is an informational error from sybase that we can safely ignore. Currently ignores the Text conversion errors that are causing the connect to fail.

returns 1 for all other errors to cause DBI to process them.

NOTE:



 All data fields are accessible by specifying the object and
 variable as follows:
 Ex.  $value = $obj->variable;

 Any methods where it is possible to specify just a single
 argument and still have it be valid, you can now specify
 the argument without having to name it first.

 Ex:  calling read() without using the substitute or plug
 options can be done as $dbi->read("SELECT * from test");

 Methods updated to support this:
 setError, read, readXML, write, setLogLevel



AUTHOR

James A. Pattie, james at pcxperience dot com

SEE ALSO

perl(1), DBI(3), DBIWrapper::XMLParser(3), DBIWrapper::ResultSet(3)
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