Examples of org.apache.empire.db.DBColumn

org.apache.empire.db.DBColumn
This is the base class for all database columns that have a physical representation. i.e. either table or view columns (DBTableColumn oder DBViewColumn)
The column object describes a database column and thus provides metadata. Other non data model specific metadata may be added through attributes. @see org.apache.empire.db.DBTableColumn @see org.apache.empire.db.DBView.DBViewColumn

                    
                    if (dbTable != null)
                    {
                        
                        // check if the found column exists in the found DBTable
                        DBColumn col = dbTable.getColumn(columnName);
                        if (col == null)
                        {
                            log.warn("COLUMN NOT FOUND IN " + db.getClass().getName() + "\t: [" + tableName + "]["
                                           + columnName + "][" + dataType + "][" + dataLength + "]");
                            continue;

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     */
    public boolean isJoinOn(DBRowSet rowset)
    {
        if (rowset==null)
            return false;
        DBColumn l = (left !=null ? left .getUpdateColumn() : null);
        DBColumn r = (right!=null ? right.getUpdateColumn() : null);
        DBRowSet rsl = (l!=null ? l.getRowSet() : null);
        DBRowSet rsr = (r!=null ? r.getRowSet() : null);
        return rowset.equals(rsl) || rowset.equals(rsr);
    }

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      {
        DBCompareColExpr o = (DBCompareColExpr)other;
        DBColumnExpr oexpr = o.getColumnExpr();
        if (expr.equals(oexpr))
          return true;
        DBColumn col  = expr.getUpdateColumn();
        DBColumn ocol = oexpr.getUpdateColumn();
        return (col!=null) ? (col.equals(ocol)) : false;
      }
      return false;
    }

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    public boolean isJoinOn(DBRowSet rowset)
    {
        if (rowset==null)
            return false;
        DBColumn l = (left !=null ? left .getUpdateColumn() : null);
        DBColumn r = (right!=null ? right.getUpdateColumn() : null);
        DBRowSet rsl = (l!=null ? l.getRowSet() : null);
        DBRowSet rsr = (r!=null ? r.getRowSet() : null);
        return rowset.equals(rsl) || rowset.equals(rsr);
    }

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        // add Comments
        createComment(db, "TABLE", t, t.getComment(), script);
        columns = t.getColumns().iterator();
        while (columns.hasNext())
        {
            DBColumn c = columns.next();
            String com = c.getComment();
            if (com != null)
                createComment(db, "COLUMN", c, com, script);
        }
        // done
        return success();

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        sql.append("COMMENT ON ");
        sql.append(type);
        sql.append(" ");
        if (expr instanceof DBColumn)
        {
            DBColumn c = (DBColumn)expr;
            c.getRowSet().addSQL(sql, DBExpr.CTX_NAME);
            sql.append(".");
        }
        expr.addSQL(sql, DBExpr.CTX_NAME);
        sql.append(" IS '");
        sql.append(comment);

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                    if (dbTable != null)
                    {
                        
                        // check if the found column exists in the found DBTable
                        DBColumn col = dbTable.getColumn(columnName);
                        if (col == null)
                        {
                            log.warn("COLUMN NOT FOUND IN " + db.getClass().getName() + "\t: [" + tableName + "]["
                                           + columnName + "][" + dataType + "][" + dataLength + "]");
                            continue;

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      {
        DBCompareColExpr o = (DBCompareColExpr)other;
        DBColumnExpr oexpr = o.getColumnExpr();
        if (expr.equals(oexpr))
          return true;
        DBColumn col  = expr.getUpdateColumn();
        DBColumn ocol = oexpr.getUpdateColumn();
        return (col!=null) ? (col.equals(ocol)) : false;
      }
      return false;
    }

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                if (dbTable != null)
                {
                    
                    // check if the found column exists in the found DBTable
                    DBColumn col = dbTable.getColumn(columnName);
                    if (col == null)
                    {
                        log.warn("COLUMN NOT FOUND IN " + db.getClass().getName() + "\t: [" + tableName + "]["
                                       + columnName + "][" + dataType + "][" + dataLength + "]");
                        continue;

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        DBDatabase db = t.getDatabase();
        createComment(db, "TABLE", t, t.getComment(), script);
        Iterator<DBColumn> columns = t.getColumns().iterator();
        while (columns.hasNext())
        {
            DBColumn c = columns.next();
            String com = c.getComment();
            if (com != null)
                createComment(db, "COLUMN", c, com, script);
        }
    }

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