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76 lines
2.9 KiB
Transact-SQL
76 lines
2.9 KiB
Transact-SQL
USE sales
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GO
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-- Create data source for HDFS inside SQL big data cluster using the HADOOP type.
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-- The HADOOP data source type was introduced in SQL Server 2016 to query data in
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-- Hadoop clusters and relies on Java Hadoop client libraries and Map/Reduce for query
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-- execution.
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--
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IF NOT EXISTS(SELECT * FROM sys.external_data_sources WHERE name = 'HadoopData')
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IF SERVERPROPERTY('ProductLevel') = 'CTP2.4'
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CREATE EXTERNAL DATA SOURCE HadoopData
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WITH(
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TYPE=HADOOP,
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LOCATION='hdfs://mssql-master-pool-0.service-master-pool:9000/',
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RESOURCE_MANAGER_LOCATION='mssql-master-pool-0.service-master-pool:8032'
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);
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ELSE IF SERVERPROPERTY('ProductLevel') = 'CTP2.5'
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CREATE EXTERNAL DATA SOURCE HadoopData
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WITH(
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TYPE=HADOOP,
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LOCATION='hdfs://nmnode-0-0.nmnode-0-svc:9000/',
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RESOURCE_MANAGER_LOCATION='master-0.master-svc:8032'
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);
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-- Create file format for orc file with appropriate properties.
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--
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IF NOT EXISTS(SELECT * FROM sys.external_file_formats WHERE name = 'orc_file')
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CREATE EXTERNAL FILE FORMAT orc_file
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WITH (
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FORMAT_TYPE = ORC,
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DATA_COMPRESSION = 'org.apache.hadoop.io.compress.SnappyCodec'
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);
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-- Create external table over HDFS data source using HADOOP type in
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-- SQL Server 2019 big data cluster. The HADOOP data source is existing
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-- PolyBase v1 syntax available by specifying location to HDFS namenode in
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-- SQL Server big data cluster.
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--
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IF NOT EXISTS(SELECT * FROM sys.external_tables WHERE name = 'web_clickstreams_hdfs_orc')
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CREATE EXTERNAL TABLE [web_clickstreams_hdfs_orc]
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("wcs_click_date_sk" BIGINT , "wcs_click_time_sk" BIGINT , "wcs_sales_sk" BIGINT , "wcs_item_sk" BIGINT , "wcs_web_page_sk" BIGINT , "wcs_user_sk" BIGINT)
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WITH
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(
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DATA_SOURCE = HadoopData,
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LOCATION = '/user/hive/warehouse/web_clickstreams_orc',
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FILE_FORMAT = orc_file
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);
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GO
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-- Join external table with local tables
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--
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SELECT
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wcs_user_sk,
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SUM( CASE WHEN i_category = 'Books' THEN 1 ELSE 0 END) AS book_category_clicks,
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SUM( CASE WHEN i_category_id = 1 THEN 1 ELSE 0 END) AS [Home & Kitchen],
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SUM( CASE WHEN i_category_id = 2 THEN 1 ELSE 0 END) AS [Music],
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SUM( CASE WHEN i_category_id = 3 THEN 1 ELSE 0 END) AS [Books],
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SUM( CASE WHEN i_category_id = 4 THEN 1 ELSE 0 END) AS [Clothing & Accessories],
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SUM( CASE WHEN i_category_id = 5 THEN 1 ELSE 0 END) AS [Electronics],
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SUM( CASE WHEN i_category_id = 6 THEN 1 ELSE 0 END) AS [Tools & Home Improvement],
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SUM( CASE WHEN i_category_id = 7 THEN 1 ELSE 0 END) AS [Toys & Games],
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SUM( CASE WHEN i_category_id = 8 THEN 1 ELSE 0 END) AS [Movies & TV],
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SUM( CASE WHEN i_category_id = 9 THEN 1 ELSE 0 END) AS [Sports & Outdoors]
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FROM [dbo].[web_clickstreams_hdfs_orc]
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INNER JOIN item it ON (wcs_item_sk = i_item_sk
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AND wcs_user_sk IS NOT NULL)
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GROUP BY wcs_user_sk;
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GO
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-- Cleanup
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/*
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DROP EXTERNAL TABLE [dbo].[web_clickstreams_hdfs_orc];
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GO
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*/
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