Validate a Presto-to-Teradata Link | QueryGrid - Validating a Presto-to-Teradata Link - Teradata QueryGrid

QueryGrid™ Installation and User Guide - 3.06

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
Lake
VMware
Product
Teradata QueryGrid
Release Number
3.06
Published
December 2024
ft:locale
en-US
ft:lastEdition
2024-12-07
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ndp1726122159943.ditamap
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dita:id
lxg1591800469257
Product Category
Analytical Ecosystem
Complete these steps to verify a Presto-to-Teradata link. For example, for a Presto-to-Teradata link:
  1. Log on as the Presto user to master node on which the Presto connector is installed.
  2. Confirm setup of the Presto-to-Teradata link properties file by invoking the Trino CLI, then running SHOW CATALOGS. For example, for a Presto-to-Teradata connector link:
    tdh234m1:~ # trino-cli --server localhost:8090
    trino> use hive.testuser;
    trino:testuser> show catalogs;
    The following output indicates that the Presto-to-Teradata link properties file tdh234m1sdld0461_active is set up and recognized as a catalog by Presto:
    Catalog
    -------------------------
    hive
    system
    tdh234m1sdld0461_active
    tpch
  3. Retrieve all databases on a Teradata system by running SHOW SCHEMAS FROM <catalog_name>. For example:
    trino:testuser> show schemas from tdh234m1sdld0461_active;
    The following output indicates retrieval of all databases including system databases that reside on the target Teradata system:
    Schema
    -------------------------
    PUBLIC
    SQLJ
    SYSBAR
    …
    testuser
    …
  4. Retrieve all tables in a Teradata system by running SHOW TABLES FROM <catalog_name>.<schema_name>. For example:
    trino:testuser> show tables from tdh234m1sdld0461_active.testuser;
    The following output indicates retrieval of all tables in the testuser database that reside on the target Teradata system:
    Schema
    -------------------------
    testtable1
    testtable2
    …
  5. Confirm that enable_dynamic_filtering is set to false in Presto:
    show session

    Confirm that dynamic filtering is disabled, if not set to false. Teradata recommends performing one of the options described in Disabling Dynamic Filtering. You must restart the Presto server for modifications to a configuration file to take effect.