115 lines
7.7 KiB
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115 lines
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<title>Copy data using CL commands</title>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Copy data using CL commands</h1>
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<div><p>There are two sets of CL commands that allow you to copy data between
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stream files and database file members.</p>
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<div class="section"><h4 class="sectiontitle"><span class="cmdname">CPYTOSTMF</span> and <span class="cmdname">CPYFRMSTMF</span> commands</h4><p>You
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can use the <span class="cmdname">Copy from Stream File (CPYFRMSTMF)</span> and <span class="cmdname">Copy
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to Stream File (CPYTOSTMF)</span> commands to copy data between stream
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files and database file members. You can create a stream file from a database
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file member by using the <span class="cmdname">CPYTOSTMF</span> command. You can also
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create a database file member from a stream file by using the <span class="cmdname">CPYFRMSTMF</span> command.
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If the file or member that is the target of the copy does not exist, it is
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created.</p>
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</div>
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<div class="section"><p>There are some limitations, however. The database file must be
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either a program-described physical file containing only one field or a source
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physical file containing only one text field. The commands give you a variety
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of options for converting and reformatting the data that is being copied.</p>
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</div>
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<div class="section"><p>The <span class="cmdname">CPYTOSTMF</span> and <span class="cmdname">CPYFRMSTMF</span> commands
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can also be used to copy data between a stream file and a save file.</p>
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</div>
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<div class="section"><h4 class="sectiontitle"><span class="cmdname">CPYTOIMPF</span> and <span class="cmdname">CPYFRMIMPF</span> commands</h4><p>You
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can also use the <span class="cmdname">Copy to Import File (CPYTOIMPF)</span> and <span class="cmdname">Copy
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from Import File (CPYFRMIMPF)</span> commands to copy data between stream
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files and database members. The <span class="cmdname">CPYTOSTMF</span> and <span class="cmdname">CPYFRMSTMF</span> commands
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do not allow you to move data from complex, externally-described (DDS-described)
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database files. The word <em>import file</em> refers to the stream type file;
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the term typically refers to a file created for purposes of copying data between
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heterogeneous databases.</p>
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</div>
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<div class="section"><p>When copying from a stream (or import) file, the <span class="cmdname">CPYFRMIMPF</span> command
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allows you to specify a field definition file (FDF), which describes the data
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in the stream file. Or, you can specify that the stream files is delimited,
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and what characters are used to mark string, field, and record boundaries.
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Options for converting special data types such as time and date are also provided. </p>
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</div>
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<div class="section"><p>Data conversion is provided on these commands if the target stream
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file or database member already exists. If the file does not exist, you can
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use the following two-step method to get the data converted:</p>
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</div>
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<div class="section"> <ol><li>Use the <span class="cmdname">CPYTOIMPF</span> and <span class="cmdname">CPYFRMIMPF</span> commands
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to copy the data between the externally-described file and a source physical
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file.</li>
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<li>Use the <span class="cmdname">CPYTOSTMF</span> and <span class="cmdname">CPYFRMSTMF</span> commands
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(which provide full data conversion regardless of whether the destination
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file exists) to copy between the source physical file and the stream file.</li>
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</ol>
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</div>
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<div class="section"><p>Here is an example:</p>
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</div>
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<div class="example"> <img src="./delta.gif" alt="Start of change" /><pre>CPYTOIMPF FROMFILE(DB2FILE) TOFILE(EXPFILE) DTAFMT(*DLM)
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FLDDLM(';') RCDDLM(X'07') STRDLM(*DBLQUOTE) DATFMT(*USA) TIMFMT(*USA) </pre><img src="./deltaend.gif" alt="End of change" />
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</div>
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<div class="section"><p>The DTAFMT parameter specifies that the input stream (import)
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file is delimited; the other choice is DTAFMT(*FIXED), which requires an field
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definition file to be specified. The FLDDLM, RCDDLM and STRDLM parameters
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identify the characters that act as the delimiters, or separators for fields,
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records, and strings.</p>
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</div>
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<div class="section"><p>The DATFMT and TIMFMT parameters indicate the format for any date
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and time information that is copied to the import file. </p>
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</div>
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<div class="section"><p>The commands are useful because they can be placed into a program,
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and they run entirely on your server. However, the interfaces are complex.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaaxstmpgm.htm" title="If you are familiar with operating on database files using record-oriented facilities such as data description specifications (DDS), you may find some fundamental differences in the way you operate on stream files.">Copy data between stream files and database files</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../cl/cpytostmf.htm">Copy to Stream File (CPYTOSTMF) command</a></div>
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<div><a href="../cl/cpyfrmstmf.htm">Copy from Stream File (CPYFRMSTMF) command</a></div>
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<div><a href="../cl/cpytoimpf.htm">Copy to Import File (CPYTOIMPF) command</a></div>
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<div><a href="../cl/cpyfrmimpf.htm">Copy from Import File (CPYFRMIMPF) command</a></div>
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<div><a href="../rbam6/rbam6clmain.htm">Control language (CL)</a></div>
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</div>
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</div>
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