(SQL Server) CSV Column Names

Demonstrates how to access CSV column names.

The Chilkat CSV library/component/class is freeware. The downloads for .NET, C++, Perl, Java, Ruby, and Python contain all of the Chilkat classes, some of which are freeware and some of which require licensing.

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-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example program loads a file (sample.csv)
    -- that contains this content:
    -- 
    -- year,color,country,food
    -- 2001,red,France,cheese
    -- 2005,blue,"United States",hamburger
    -- 2008,green,Italy,pasta
    -- 1998,orange,Japan,sushi
    -- 
    -- The first row contains the column names.
    -- This file is available at:
    -- http://www.chilkatsoft.com/testData/sample.csv

    DECLARE @csv int
    -- Use "Chilkat_9_5_0.Csv" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Csv', @csv OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Prior to loading the CSV file, indicate that the 1st row
    -- should be treated as column names:
    EXEC sp_OASetProperty @csv, 'HasColumnNames', 1

    -- Load the CSV records from the file:
    DECLARE @success int

    EXEC sp_OAMethod @csv, 'LoadFile', @success OUT, 'sample.csv'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @csv, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @csv
        RETURN
      END

    -- Display the column names:
    DECLARE @i int

    DECLARE @colName nvarchar(4000)

    DECLARE @idx int

    EXEC sp_OAGetProperty @csv, 'NumColumns', @iTmp0 OUT
    SELECT @i = 0
    WHILE @i <= @iTmp0 - 1
      BEGIN
        EXEC sp_OAMethod @csv, 'GetColumnName', @colName OUT, @i


        PRINT @i + ': ' + @colName

        -- The following line demonstrates to to get the column
        -- index given a column name:
        EXEC sp_OAMethod @csv, 'GetIndex', @idx OUT, @colName


        PRINT @colName + ' is at column index ' + @idx
        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @csv


END
GO