OPENC command: Difference between revisions

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</dl>
</dl>
==Syntax==
==Syntax==
<p class="syntax">OPENC {[FILE] filename [AT location]
<p class="syntax">OPENC {[FILE] filename [AT <var class="term">location</var>]
   [[,defupdt1] [,defupdt2]]  
   [[,<var class="term">defupdt1</var>] [,<var class="term">defupdt2</var>]]  
   | [PERM | TEMP] [GROUP] groupname}
   | [PERM | TEMP] [GROUP] <var class="term">groupname</var>}
</p>
</p>
   
   
<b>Where:</b>
<b>Where:</b>
<table>
<tr>
<th><var class="term">filename</var></th>
<td>The name of the <var class="product">Model&nbsp;204</var> file to be opened.</td>
</tr>
<tr>
<th>location</th>
<td>
<ul>  
<ul>  
<li>
<li>
<p>filename is the name of the <var class="product">Model&nbsp;204</var> file to be opened.</p>
For Parallel Query Option/204 files, the symbolic name (as many as eight characters) that refers to the location of the node on which the remote file resides. An unquoted equal sign (=) specifies that the file is local.
</li>
</li>
<li>
<li>
<p>location</p>
If remote, must match a symbolic destination name specified in the DESTINATION parameter of the relevant local client DEFINE PROCESS command.
<ul>
<li>
<p>For Parallel Query Option/204 files, is the symbolic name (as many as eight characters) that refers to the location of the node on which the remote file resides. An unquoted equal sign (=) specifies that the file is local.</p>
</li>
<li>
<p>If remote, must match a symbolic destination name specified in the DESTINATION parameter of the relevant local client DEFINE PROCESS command.</p>
</li>
</ul>
</li>
<li>
<p>defupdt1 is the name (one to eight characters in the form TAPExxxx) of the fixed-length deferred update data set. If you specify this option, deferred updates to the hashed index (KEY and NUMERIC RANGE fields) are written to this data set.</p>
</li>
</li>
  </ul>
  </ul>
</td>
</tr>
<tr>
<th><var class="term">defupdt1</var></th>
<td>The name (one to eight characters in the form TAPE<var class="term">xxxx</var>) of the fixed-length deferred update data set. If you specify this option, deferred updates to the hashed index (KEY and NUMERIC RANGE fields) are written to this data set.
<p>Deferred updates are updates to the <var class="product">Model&nbsp;204</var> file that are saved and applied all at the same time.    </p>
<p>Deferred updates are updates to the <var class="product">Model&nbsp;204</var> file that are saved and applied all at the same time.    </p>
<p>For information about opening remote files in deferred update mode, see the <var>Parallel Query Option/204 User's Guide.</var> </p>
<p>For information about opening remote files in deferred update mode, see [[PQO: Remote files and scattered groups]].</p>
<table>  
</td>
</tr>
 
<tr>
<tr>
<th>defupdt2</th>
<th><var class="term">defupdt2</var></th>
<td> is the name (one to eight characters in the form TAPExxxx) of the variable-length deferred update data set. If you specify this option, deferred updates to ORDERED fields are written to this data set.  
<td>The name (one to eight characters in the form TAPE<var class="term">xxxx</var>) of the variable-length deferred update data set. If you specify this option, deferred updates to ORDERED fields are written to this data set.  
<p>All index updates are written to defupdt2 if defupdt1 is not specified. If defupdt2 is not specified, updates to ORDERED fields are not deferred.</p>
<p>All index updates are written to <var class="term">defupdt2</var> if <var class="term">defupdt1</var> is not specified. If <var class="term">defupdt2</var> is not specified, updates to ORDERED fields are not deferred.</p>
</td>
</td>
</tr>
</tr>
 
<tr>
<tr>
<th>groupname</th>
<th>groupname</th>
<td> is the name of the <var class="product">Model&nbsp;204</var> file group to be opened.</td>
<td>The name of the <var class="product">Model&nbsp;204</var> file group to be opened.</td>
</tr>
</tr>
   
   
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<p>A comma is required if a deferred update data set is specified. If the comma is omitted, the data set is ignored and no message is generated.</p>
<p>A comma is required if a deferred update data set is specified. If the comma is omitted, the data set is ignored and no message is generated.</p>
<p>If neither FILE nor GROUP is specified, <var class="product">Model&nbsp;204</var> searches for a temporary group, followed by a permanent group, followed by a file. If neither TEMP nor PERM is specified, <var class="product">Model&nbsp;204</var> assumes a temporary group.</p>
<p>If neither FILE nor GROUP is specified, <var class="product">Model&nbsp;204</var> searches for a temporary group, followed by a permanent group, followed by a file. If neither TEMP nor PERM is specified, <var class="product">Model&nbsp;204</var> assumes a temporary group.</p>
==Example==
==Example==
<p class="code">OPENC FILE CENSUS
<p class="code">OPENC FILE CENSUS
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<p>Like the OPEN command, you can use OPENC to open a file or a permanent or temporary group. Unlike OPEN, however, OPENC preserves the previous default file or group.</p>
<p>Like the OPEN command, you can use OPENC to open a file or a permanent or temporary group. Unlike OPEN, however, OPENC preserves the previous default file or group.</p>
<p>The syntax and use of the OPENC command is identical to that described for the OPEN command.</p>
<p>The syntax and use of the OPENC command is identical to that described for the OPEN command.</p>
[[Category: General user commands]]
[[Category: User commands]]
[[Category:Commands]]
[[Category:Commands]]

Latest revision as of 23:14, 14 April 2017

Summary

Privileges
Any user
Function
Opens a Model 204 file or a temporary or permanent group, preserving the previous default file or group

Syntax

OPENC {[FILE] filename [AT location] [[,defupdt1] [,defupdt2]] | [PERM | TEMP] [GROUP] groupname}

Where:

filename The name of the Model 204 file to be opened.
location
  • For Parallel Query Option/204 files, the symbolic name (as many as eight characters) that refers to the location of the node on which the remote file resides. An unquoted equal sign (=) specifies that the file is local.
  • If remote, must match a symbolic destination name specified in the DESTINATION parameter of the relevant local client DEFINE PROCESS command.
defupdt1 The name (one to eight characters in the form TAPExxxx) of the fixed-length deferred update data set. If you specify this option, deferred updates to the hashed index (KEY and NUMERIC RANGE fields) are written to this data set.

Deferred updates are updates to the Model 204 file that are saved and applied all at the same time.

For information about opening remote files in deferred update mode, see PQO: Remote files and scattered groups.
defupdt2 The name (one to eight characters in the form TAPExxxx) of the variable-length deferred update data set. If you specify this option, deferred updates to ORDERED fields are written to this data set.

All index updates are written to defupdt2 if defupdt1 is not specified. If defupdt2 is not specified, updates to ORDERED fields are not deferred.
groupname The name of the Model 204 file group to be opened.

Syntax notes

A comma is required if a deferred update data set is specified. If the comma is omitted, the data set is ignored and no message is generated.

If neither FILE nor GROUP is specified, Model 204 searches for a temporary group, followed by a permanent group, followed by a file. If neither TEMP nor PERM is specified, Model 204 assumes a temporary group.

Example

OPENC FILE CENSUS OPENC WEEK OPENC PERM GROUP GDATA

Usage notes

Like the OPEN command, you can use OPENC to open a file or a permanent or temporary group. Unlike OPEN, however, OPENC preserves the previous default file or group.

The syntax and use of the OPENC command is identical to that described for the OPEN command.

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