83 lines
4.4 KiB
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83 lines
4.4 KiB
HTML
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<title>Examples of NODENAME with DB2 Multisystem</title>
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<h1 class="topictitle1">Examples of NODENAME with DB2<sup>®</sup> Multisystem</h1>
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<div><p>Here gives an example about how to use the NODENAME function.</p>
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<div class="section"> <ul><li>Find the node name and the partition number for every row of the EMPLOYEE
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table, and the corresponding value of the EMPNO columns for each row. <div class="p">SQL
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statement: <pre>SELECT NODENAME(CORPDATA.EMPLOYEE), PARTITION(CORPDATA.EMPLOYEE), EMPNO
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FROM CORPDATA.EMPLOYEE</pre>
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</div>
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</li>
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<li>Find the node name for every record of the EMPLOYEE table. <div class="p">OPNQRYF
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command: <pre>OPNQRYF FILE((CORPDATA/EMPLOYEE))
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FORMAT(FNAME)
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MAPFLD((NODENAME '%NODENAME(1)'))</pre>
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</div>
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</li>
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<li>Join the EMPLOYEE and DEPARTMENT tables, select the employee number (EMPNO)
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and determine the node from which each row involved in the join originated.
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<div class="p">SQL statement: <pre>SELECT EMPNO, NODENAME(X), NODENAME(Y)
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FROM CORPDATA.EMPLOYEE X, CORPDATA.DEPARTMENT Y
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WHERE X.DEPTNO=Y.DEPTNO</pre>
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</div>
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<div class="p">OPNQRYF command: <pre>OPNQRYF FILE((CORPDATA/EMPLOYEE) (CORPDATA/DEPARTMENT))
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FORMAT(FNAME)
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JFLD((EMPLOYEE/DEPTNO DEPARTMENT/DEPTNO *EQ))
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MAPFLD((EMPNO 'EMPLOYEE/EMPNO')
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(NODENAME1 '%NODENAME(1)')
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(NODENAME2 '%NODENAME(2)'))</pre>
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</div>
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</li>
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<li>Join the EMPLOYEE and DEPARTMENT tables, select all rows of the result
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where the rows of the two tables are on the same node. <div class="p">SQL statement:
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<pre>SELECT *
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FROM CORPDATA.EMPLOYEE X, CORPDATA.DEPARTMENT Y
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WHERE NODENAME(X)=NODENAME(Y)</pre>
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</div>
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<div class="p">OPNQRYF command:
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<pre>OPNQRYF FILE((CORPDATA/EMPLOYEE) (CORPDATA/DEPARTMENT))
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FORMAT(FNAME)
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JFLD((1/NODENAME1 2/NODENAME2 *EQ))
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MAPFLD((NODENAME1 '%NODENAME(1)')
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(NODENAME2 '%NODENAME(2)'))</pre>
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</div>
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</li>
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</ul>
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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="scalarnodename.htm" title="Through the NODENAME function, you can determine the name of the relational database (RDB) where a specific row of the distributed relational database is stored.">NODENAME with DB2 Multisystem</a></div>
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