17.10 - Example: NOSREAD_SCHEMA with Parquet Schema - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Operators and User-Defined Functions

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Administration
Programming Reference
Publication ID
B035-1210-171K
Language
English (United States)

If not already done, create the authorization object. See Example: Create an Authorization Object.

Run the READ_NOS command:

SELECT * FROM (
LOCATION='/s3/td-usgs-public.s3.amazonaws.com/PARQUETDATA/'
AUTHORIZATION=MyAuthObj
RETURNTYPE='NOSREAD_SCHEMA'
) AS d;

Your result will be similar to the following:

ColPosition      1
        Name GageHeight2
TdatDataType FLOAT
PhysicalType DOUBLE
 LogicalType NONE
   Precision           0
       Scale           0
   MinLength           0
   MaxLength           0
   NullFound    1
    FileType parquet
    Location /S3/s3.amazonaws.com/td-usgs-public/PARQUETDATA/

 ColPosition      2
        Name Flow
TdatDataType FLOAT
PhysicalType DOUBLE
 LogicalType NONE
   Precision           0
       Scale           0
   MinLength           0
   MaxLength           0
   NullFound    1
    FileType parquet
    Location /S3/s3.amazonaws.com/td-usgs-public/PARQUETDATA/

The output is displayed vertically for readability.