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Re: new patch for index DESC/NULLS FIRST/NULLS LAST

From: "Dave Page" <dpage(at)pgadmin(dot)org>
To: "Quan Zongliang" <quanzongliang(at)gmail(dot)com>
Cc: pgadmin-hackers(at)postgresql(dot)org
Subject: Re: new patch for index DESC/NULLS FIRST/NULLS LAST
Date: 2008-11-20 11:45:55
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgadmin-hackers

On Wed, Nov 19, 2008 at 12:38 PM, Quan Zongliang
<quanzongliang(at)gmail(dot)com> wrote:
> hi, all
> new version Patch for TODO item:
> - Add support for DESC/NULLS FIRST/NULLS LAST when creating indexes.
> The Go method in dlgIndex seems clumsy. Maybe we need a new
> pgIndexColumn class or another coding?

Hmm, it's getting that way - but another class seems a little
excessive at this point I think.

That code could use some formatting changes though - for example, in
pgAdmin we use:

if (foo == 0)


if (foo == 0) {

We also try to leave empty lines between distinct blocks of code to
aid readability.

> Now, OnAddCol, OnRemoveCol, GetColumns and OnChangeSize methods have
> different vesion in dlgIndex and dlgIndexConstraint.
> The OnChangeSize for Mac in dlgIndex rewrite to:
>        lstColumns->SetSize(wxDefaultCoord, wxDefaultCoord,
>            ev.GetSize().GetWidth(), ev.GetSize().GetHeight() - 800);
> I don't know whether the size is right.

The sizing looks OK on Mac.

> New method OnDescChange added to dlgIndex.

OK - some thoughts:

- lstColumns should always display the order and nulls values, not
just when they are non-default.

- The NULLs radio buttons should not have a shaded box around them.
See the Mode option on dlgFunction for an example.

- I think the dialogue design would look nicer if the DESC and and
NULLs options were on the same horizontal alignment, eg:

DESC []        NULLs    O FIRST    O LAST

What do you think?

- When creating an index with one column, using DESC, I clicked on the
SQL tab and got an assert:

Thread 0 Crashed:
0   libSystem.B.dylib             	0x919bab9e __kill + 10
1   libSystem.B.dylib             	0x91a31ec2 raise + 26
2   ...x_base_carbonud-2.8.0.dylib	0x01608f84 wxTrap() + 18
3   libwx_macud_core-2.8.0.dylib  	0x01022912
wxGUIAppTraitsBase::ShowAssertDialog(wxString const&) + 254
4   ...x_base_carbonud-2.8.0.dylib	0x016094f2 ShowAssertDialog(wchar_t
const*, int, wchar_t const*, wchar_t const*, wchar_t const*,
wxAppTraits*) + 412
5   ...x_base_carbonud-2.8.0.dylib	0x016097aa
wxAppConsole::OnAssertFailure(wchar_t const*, int, wchar_t const*,
wchar_t const*, wchar_t const*) + 60
6   ...x_base_carbonud-2.8.0.dylib	0x0160962c wxOnAssert(wchar_t
const*, int, char const*, wchar_t const*, wchar_t const*) + 232
7   libwx_macud_core-2.8.0.dylib  	0x00f78149
wxChoice::GetString(unsigned int) const + 97
8   libwx_macud_core-2.8.0.dylib  	0x00f7ada4 wxComboBox::GetValue() const + 116
9   pgAdmin3-Debug                	0x000b8fa4 dlgIndex::GetSql() + 664
10  pgAdmin3-Debug                	0x000ce29d
dlgProperty::FillSQLTextfield() + 383 (dlgProperty.cpp:615)
11  pgAdmin3-Debug                	0x000cfb0e
dlgProperty::OnPageSelect(wxNotebookEvent&) + 138

That aside, functionally, it seems to work as it should :-)


Dave Page
EnterpriseDB UK:

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Subject: Re: extending functionality strategy

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