Sample External CSV Data with READ_NOS | Native Object Store | Teradata Vantage - 17.10 - Sampling External Data In Place Using READ_NOS - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Native Object Store Getting Started Guide

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1214-171K
Language
English (United States)

Preview the contents of an external object store by using the READ_NOS table operator. In this example, the payload column contains the data.

The examples and results show a sample river flow data set. To use your own data, replace the table and column names, and authorization object.

  1. To run NOS-related commands, log on to the database as a user with the required privileges.
  2. To see sample rows without column names:
    SELECT TOP 2 * FROM READ_NOS_FM (
    USING
    LOCATION('/s3/td-usgs-public.s3.amazonaws.com/CSVDATA/')
    RETURNTYPE('NOSREAD_RECORD')
    ) AS D;

    See Variable Substitutions for Examples for the credentials and location values for the sample river flow data set.

    Your result will be similar to the following:

         Location /S3/s3.amazonaws.com/td-usgs-public/CSVDATA/09429070/2018/07/
      GageHeight2     ?
             Flow     ?
          site_no     9429070
         datetime 2018-07-02 14:35
    Precipitation  1.16
       GageHeight     ?
    
         Location /S3/s3.amazonaws.com/td-usgs-public/CSVDATA/09400815/2018/07/
      GageHeight2     ?
             Flow   .00
          site_no     9400815
         datetime 2018-07-10 00:00
    Precipitation   .00
       GageHeight  -.01

    The output is displayed vertically for readability.