Examples of org.apache.ws.jaxme.sqls.SelectStatement

org.apache.ws.jaxme.sqls.SelectStatement

Interface of a SELECT statement.
@author Jochen Wiedmann

    /** <p>Test for a LEFT OUTER JOIN statement.</p>
     */
    public void testLeftOuterJoin() {
        Table table = getPrimaryKeyTable();
        Table otherTable = getForeignKeyTable(table);
        SelectStatement statement = otherTable.getSelectStatement();
        SelectTableReference tableReference = statement.getSelectTableReference();
        JoinReference joinReference = tableReference.leftOuterJoin(table);
        
        TableReference refLocal = tableReference;
        TableReference refRef = tableReference.getRightJoinedTableReference();
        
        joinReference.getOn().addJoin((ForeignKey) otherTable.getForeignKeys().next(),
                refLocal, refRef);
        CombinedConstraint cc = statement.getWhere();
        BooleanConstraint bc = cc.createEQ();
        bc.addPart(tableReference.newColumnReference("MyIndex"));
        bc.addPlaceholder();
        
        SQLGenerator generator = getSQLGenerator();

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    /** <p>Test for an EXISTS clause.</p>
     */
    public void testExists() {
        Table table = getPrimaryKeyTable();
        Table otherTable = getForeignKeyTable(table);
        SelectStatement statement = table.getSelectStatement();
        SelectTableReference tableReference = statement.getSelectTableReference();
        SelectStatement existsStatement = otherTable.getSelectStatement();
        SelectTableReference existsTableReference = existsStatement.getSelectTableReference();
        BooleanConstraint bc = existsStatement.getWhere().createEQ();
        bc.addPart(existsTableReference.newColumnReference("RefIndex"));
        bc.addPart(tableReference.newColumnReference("MyIndex"));
        statement.getWhere().createEXISTS(existsStatement);
        
        SQLGenerator generator = getSQLGenerator();

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    /** <p>Test for composed primary keys.</p>
     */
    public void testComposedPrimaryKey() {
        Table table = getComposedKeyTable();
        
        SelectStatement statement = table.getSelectStatement();
        statement.getWhere().addColumnSetQuery(table.getPrimaryKey(), statement.getTableReference());
        SQLGenerator generator = getSQLGenerator();
        generator.setLineTerminator("\n");
        String s = generator.getQuery(statement);
        assertEquals("SELECT MyIndex, MyName, MyDate, VerNum FROM MySchema.MyTable WHERE (MyIndex=? AND VerNum=?)", s);
    }

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        Table otherTable = table.getSchema().newTable("OtherTable");
        Column otherIndex = otherTable.newColumn("MyIndex", Column.Type.INTEGER);
        otherTable.newPrimaryKey().addColumn(otherIndex);
        ForeignKey foreignKey = otherTable.newForeignKey(table);
        SelectStatement selectStatement = sqlFactory.newSelectStatement();
        selectStatement.setTable(otherTable);
        DeleteStatement deleteStatement = sqlFactory.newDeleteStatement();
        deleteStatement.setTable(table);
        List columns = new ArrayList();
        for (Iterator iter = table.getColumns();  iter.hasNext();  ) {
            Column column = (Column) iter.next();
            Column refColumn = otherTable.newColumn("Ref" + column.getName(), column.getType());
            foreignKey.addColumnLink(refColumn, column);
            if (column.isPrimaryKeyPart()) {
                selectStatement.addResultColumn(selectStatement.getTableReference().newColumnReference(refColumn));
                columns.add(deleteStatement.getTableReference().newColumnReference(column));
            }
        }
        BooleanConstraint eq = selectStatement.getWhere().createEQ();
        eq.addPart(selectStatement.getTableReference().newColumnReference("RefMyName"));
        eq.addPlaceholder();
        
        BooleanConstraint bc = deleteStatement.getWhere().createIN();
        bc.addPart((ColumnReference[]) columns.toArray(new ColumnReference[columns.size()]));
        bc.addPart(selectStatement);

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        assertEquals(expect, got);
    }
    
    public void testVirtualColumn() {
        Table table = getBasicTable();
        SelectStatement selectStatement = table.getSelectStatement();
        VirtualColumn col = new VirtualColumn("virtCol", Column.Type.VARCHAR);
        selectStatement.addResultColumn(col);
        col.setValue("null");
        SQLGenerator gen = getSQLGenerator();
        String query = gen.getQuery(selectStatement);
        assertEquals("SELECT MyIndex, MyName, MyDate, null AS virtCol FROM MySchema.MyTable", query);
    }

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        assertEquals("SELECT MyIndex, MyName, MyDate, null AS virtCol FROM MySchema.MyTable", query);
    }


    public void testNOT() {
        Table table = getBasicTable();
        SelectStatement selectStatement = table.getSelectStatement();
        SelectTableReference ref = selectStatement.getSelectTableReference();
        CombinedConstraint and = selectStatement.getWhere();
        BooleanConstraint bc = and.createLIKE();
        bc.addPart(ref.newColumnReference("MyName"));
        bc.addPart("%a%");
        CombinedConstraint or = and.createOrConstraint();
        or.setNOT(true);

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      }
      return result;
   }


   public SelectStatement getSelectStatement() {
      SelectStatement result = getSchema().getSQLFactory().newSelectStatement();
      result.setTable(this);
      TableReference ref = result.getTableReference();
      for (Iterator iter = getColumns();  iter.hasNext();  ) {
         Column column = (Column) iter.next();
         result.addResultColumn(new ColumnReferenceImpl(ref, column));
      }
      return result;
   }

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     * </pre></p>
     */
    private ColumnReference getCountStatement(String pColumnName, String pFilter,
                        TableReference pAkteReference, String pTableAlias) {
        // SELECT COUNT(*) FROM DBBeteiligte klc WHERE klc.aFilter='Klaeger' AND klc.aAktenId=a.aID
        SelectStatement st = sqlFactory.newSelectStatement();
        st.setTable(dbBeteiligte);
        SelectTableReference tRef = st.getSelectTableReference();
        tRef.setAlias(pTableAlias);
        addEQ(tRef, st.getWhere(), dbBeteiligte.getColumn("aFilter"), pFilter);
        addAktenId(st.getWhere(), pAkteReference, tRef);
        VirtualColumn vc = new VirtualColumn(pColumnName, Column.Type.INTEGER);
        vc.setValue("COUNT(*)");
        st.addResultColumn(vc);


        VirtualColumn result = new VirtualColumn(pColumnName, Column.Type.INTEGER);
        result.setValue(st);
        return result;
    }

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      Column aName = dbBeteiligte.getColumn("aName");
        Column aVorname = dbBeteiligte.getColumn("aVorname");
        Column aAktenId = dbBeteiligte.getColumn("aAktenId");
        Column aFilter = dbBeteiligte.getColumn("aFilter");


        SelectStatement st = sqlFactory.newSelectStatement();
        st.setTable(dbBeteiligte);
        SelectTableReference ref = st.getSelectTableReference();
        VirtualColumn num = new VirtualColumn("NUM", Column.Type.INTEGER);
        num.setValue("COUNT(*) OVER (PARTITION BY " + aAktenId.getName() + ")");
        st.addResultColumn(num);
        VirtualColumn minAName = new VirtualColumn("MINANAME", Column.Type.VARCHAR);
        minAName.setValue("MIN(UPPER(" + aName.getName() + ")) OVER (PARTITION BY " +
                      aAktenId.getName() + ")");
        st.addResultColumn(minAName);
        VirtualColumn minAVorname = new VirtualColumn("MINAVORNAME", Column.Type.VARCHAR);
        minAVorname.setValue("MIN(UPPER(NVL(" + aVorname.getName() +
                       ", ' '))) OVER (PARTITION BY " +
                        aAktenId.getName() + ", UPPER(" + aName.getName() +
                        "))");
        st.addResultColumn(minAVorname);
        st.addResultColumn(ref.newColumnReference(aName));
        st.addResultColumn(ref.newColumnReference(aVorname));
        st.addResultColumn(ref.newColumnReference(aAktenId));
        BooleanConstraint bc = st.getWhere().createEQ();
        bc.addPart(st.getTableReference().newColumnReference(aFilter));
        bc.addPart(pFilter);
        Table t = st.createView((Table.Name) null);


        SelectStatement st2 = sqlFactory.newSelectStatement();
        st2.setTable(t);
        SelectTableReference ref2 = st2.getSelectTableReference();
        st2.addResultColumn(ref2.newColumnReference(t.getColumn("NUM")));
        Column aName2 = t.getColumn(aName.getName());
        st2.addResultColumn(ref2.newColumnReference(aName2));
        Column aVorname2 = t.getColumn(aVorname.getName());
        st2.addResultColumn(ref2.newColumnReference(aVorname2));
        st2.addResultColumn(ref2.newColumnReference(t.getColumn(aAktenId.getName())));


        bc = st2.getWhere().createEQ();
        bc.addPart(ref2.newColumnReference(t.getColumn("MINAVORNAME")));
        Function f = st2.createFunction("MIN");
        Function f2 = st.createFunction("UPPER");
        Function f3 = st.createFunction("NVL");
        f3.addPart(ref2.newColumnReference(aVorname2));
        f3.addPart(" ");
        f2.addPart(f3);
        bc.addPart(f);


        bc = st2.getWhere().createEQ();
        bc.addPart(ref2.newColumnReference(t.getColumn("MINANAME")));
        f = st2.createFunction("MIN");
        f2 = st.createFunction("UPPER");
        f2.addPart(ref2.newColumnReference(aName2));
        f.addPart(f2);
        bc.addPart(f);
        Table t2 = st2.createView(pTableAlias);


        JoinReference result = pJoinReference.leftOuterJoin(t2);
        bc = result.getOn().createEQ();
        bc.addPart(pAkteReference.newColumnReference(dbAkte.getColumn("aId")));
        bc.addPart(result.newColumnReference(t2.getColumn(aAktenId.getName())));

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        Function f = pAkteReference.getStatement().createFunction("UPPER");
        f.addPart(result.newColumnReference(dbBeteiligte.getColumn("aName")));
        bc.addPart(f);
        
        SelectStatement minStatement = sqlFactory.newSelectStatement();
        minStatement.setTable(dbBeteiligte);
        SelectTableReference minTableRef = minStatement.getSelectTableReference();
        minTableRef.setAlias(pTableAlias + "min");
        BooleanConstraint bc2 = minStatement.getWhere().createEQ();
        bc2.addPart(result.newColumnReference(dbBeteiligte.getColumn("aAktenId")));
        bc2.addPart(minTableRef.newColumnReference(dbBeteiligte.getColumn("aAktenId")));
        
        bc2 = minStatement.getWhere().createEQ();
        bc2.addPart(minTableRef.newColumnReference(dbBeteiligte.getColumn("aFilter")));
        bc2.addPart(pFilter);


        f = pAkteReference.getStatement().createFunction("MIN");
        Function f2 = pAkteReference.getStatement().createFunction("UPPER");
        f.addPart(f2);
        f2.addPart(minTableRef.newColumnReference(dbBeteiligte.getColumn("aName")));
        VirtualColumn vc = new VirtualColumn("MIN", Column.Type.VARCHAR);
        vc.setValue(f);
        minStatement.addResultColumn(vc);


        bc.addPart(minStatement);
        return result;
    }

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