Drop column by column number in MapBasic?

[Alan Carr]

Hi guys,

I'm trying to get MapBasic to drop COL13, it's probably a really obvious answer:

Alter Table "Gully_Group0" & gNum (Drop COL13)

MapInfo seems to be looking for a column named COL13 in this case, how do I make it so I don't have to use the column name?

Thanks,

Alan

[Thomas Bacon]

Alan,

 

You can get the column name using the ColumnInfo function:

 

sColName = ColumnInfo(Gully_Group0, “COL13”, COL_INFO_NAME)

 

HTH,

 

Tom Bacon

GIS Engineer, Mouchel

T 01444 472380 │ E thomas...@mouchel.com │ W www.mouchel.com

Our values: innovation │ excellence │ integrity │ responsibility

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[Alan Carr]

Thanks, just out of curiosity, how come COL13 works in my other lines such as:

Add Column "Gully_Group0" & gNum (COL4)

From "Gully_Group0" & gNum & "_Processing"

Set To COL4 where COL13 = COL13

But not this one?

[Thomas Bacon]

I’m not sure tbh. Could just be one of those quirks of MapBasic!

 

Tom Bacon

GIS Engineer, Mouchel

T 01444 472380 │ E thomas...@mouchel.com │ W www.mouchel.com

Our values: innovation │ excellence │ integrity │ responsibility

 

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