How can I list all the column names of a table by programming?
Hi,
Now I want to write an function which has the following features:
Firstly, The function was given a parameter as table name.
Then, it will lists all the columns names of the table.
e.g
table: person
---firstName------lastName----+
Michale Jackson
We can get the columns 'firstname' and 'lastName' by calling the function with table name 'person'.
And I also wonder that where I can get reference book or any other materials?
Thanks.
Edited by: wenjing wang on Feb 15, 2008 6:42 AM
Edited by: wenjing wang on Feb 15, 2008 6:57 AM
hi,
hope the below code helps u. Just take the headee which contains the field name and split it like below and compare it with the field name u want here 'last name'.
here,
'First name' will be in wt_filedata1 and remaining field names in wt_filedata2, so 'do' continues.
c_tab must be the separator, either , or + or tab etc..
CODE:
read table person into wl_header index 1.
do.
split wl_header at c_tab into: wt_filedata1 wt_filedata2.
if wt_filedata1 <> 'lastname'.
cnt1 = cnt1 + 1.
wl_header = wt_filedata2.
else.
exit.
endif.
enddo.
Please reward if it is useful.
regards,
sri
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This is a working example of a search form.
In the JSP page we have several texts box, a table bound to a DataProvider with the rowSet in the SessionBean and a search button.
JSP source:
<ui:body binding="#{PackageAirtime.body1}" id="body1">
<ui:form binding="#{PackageAirtime.form1}" id="form1">
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<tr>
<td>
<table border="0" width="100%">
<tr>
<td>
<ui:label binding="#{PackageAirtime.pageTitle}" id="pageTitle" text="Package Airtime"/>
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<br/>
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</tr>
<tr>
<td>
<table border="0" cellpadding="2" cellspacing="2">
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<td>Package ID:</td>
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<ui:textField binding="#{PackageAirtime.textPackageID}"
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<td>Airtime Code:</td>
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<ui:textField binding="#{PackageAirtime.textAirtimeCode}"
id="textAirtimeCode"/>
<ui:button
action="#{PackageAirtime.buttonAirtimeCode_action}"
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onClick="handleAirtimeCodePopup(); return false;" text="..." toolTip="Open airtime code locator"/>
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</tr>
<tr>
<td></td>
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<ui:staticText binding="#{PackageAirtime.staticTextSearchResults}" id="staticTextSearchResults"/>
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<ui:table binding="#{PackageAirtime.searchResults}" id="searchResults" paginationControls="true">
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/* ----- Functions for Table Preferences Panel ----- */
* Toggle the table preferences panel open or closed
function togglePreferencesPanel() {
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/* ----- Functions for Filter Panel ----- */
* Return true if the filter menu has actually changed,
* so the corresponding event should be allowed to continue.
function filterMenuChanged() {
var table = document.getElementById("form1:table1");
return table.filterMenuChanged();
* Toggle the custom filter panel (if any) open or closed.
function toggleFilterPanel() {
var table = document.getElementById("form1:table1");
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/* ----- Functions for Table Actions ----- */
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public void prerender() {
search_action();
public String search_action() {
try {
String command = "SELECT s23_package, s23_at_code, prsm_pk_start, prsm_pk_end, prsm_pk_units, subr_at_prepaid_period_val, subr_at_prepaid_type, subr_disc_type, subr_disc_rate, subr_disc_value, subr_disc_perm, subr_at_prepaid_bill_per_val, subr_at_prepaid_recurring, s23_package_fwd, s23_at_code_fwd, prsm_pk_start_fwd, subr_ppa_infinite, subr_ppa_carry_over, rom_plan_carry_lmt FROM s23_package_airtime, ROM_23_PPLAN_COMP where rom_23_pack_plan = s23_package";
String where = "";
String packageID = (String)textPackageID.getText();
if (packageID == null) {
packageID = "";
packageID = packageID.replace("'", "''");
if (packageID != "") {
if (where != "") {
where += " AND ";
where += "upper(S23_PACKAGE) LIKE upper('" + packageID + "%')";
String airtimeCode = (String)textAirtimeCode.getText();
if (airtimeCode == null) {
airtimeCode = "";
airtimeCode = airtimeCode.replace("'", "''");
if (airtimeCode != "") {
if (where != "") {
where += " AND ";
where += " upper(S23_AT_CODE) LIKE upper('" + airtimeCode + "%')";
if (where != "") {
command += " AND " + where;
this.getSessionBean1().getS23_package_airtimeRowSet().setCommand(command);
this.staticTextSearchResults.setText(tdi.business.Utils.getRowCountMessage(s23_package_airtimeDataProvider.getRowCount()));
catch (Exception e) {
log("Error during search for packages airtime", e);
return null;
public String searchButton_action() {
search_action();
this.tableRowGroup1.setFirst(0);
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}I put the search_action() call in the prerender() to have data in my table when the page is open. For a large resultset the best aproach is to let the user select some search criteria and then call the search_action() using a button (searchButton_action() ).
I've added a hyperlink column to my table, it is used to display the current record details in a new page.
I have defined in my SessionBean a getRowkey/setRowkey methods.
When the user click on a "View" hiperlink the following code is executed:
public String viewpackageAT_action() {
RowKey row = tableRowGroup1.getRowKey();
this.getSessionBean1().setPackageAirtimeRowKey(row);
return "packageairtime_details";
}I will step over the "Page Navigation".
In the Detail Page I have the following code:
public void init() {
this.s23_package_airtimeDataProvider.setCursorRow(this.getSessionBean1().getPackageAirtimeRowKey());
}Now I have the detail page opened and also the DataProvider opened at the saved RowKey value.
Finally, in the SessionBean:
* Holds value of property packageAirtimeRowKey.
private RowKey packageAirtimeRowKey;
* Getter for property packageAirtimeRowKey.
* @return Value of property packageAirtimeRowKey.
public RowKey getPackageAirtimeRowKey() {
return this.packageAirtimeRowKey;
* Setter for property packageAirtimeRowKey.
* @param packageAirtimeRowKey New value of property packageAirtimeRowKey.
public void setPackageAirtimeRowKey(RowKey packageAirtimeRowKey) {
this.packageAirtimeRowKey = packageAirtimeRowKey;
}Note: You should enable page navigation in the result(s) table.
That's about it :)
Hope this helps,
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