History

Rory Jaffe cd9dbcc86d Varchar 1 2 or 3 changed to char and across all database types		2017-09-09 09:21:37 -07:00
..
DataImport	Add scripts for creating a schema and importing data into Impala.	2016-10-12 11:36:40 +01:00
VocabImport	Add scripts for creating a schema and importing data into Impala.	2016-10-12 11:36:40 +01:00
OMOP_CDM_ddl_Impala.sql	Varchar 1 2 or 3 changed to char and across all database types	2017-09-09 09:21:37 -07:00
OMOP_Parquet.sql	Closes cdm proposal #71 and updates headers for CDM v5.2	2017-07-14 10:28:17 -04:00
OMOP_Parquet_v5.1.sql	Change empty 'invalid_reason' field to null for compatibility with Atlas cohort generation.	2017-07-06 09:48:01 +01:00
OMOP_Parquet_v5.2.sql	Addresses cdm proposal #85	2017-07-14 15:44:35 -04:00
README.md	Add a step to transform data into Parquet, and use TIMESTAMP type for dates.	2017-04-18 11:05:47 +01:00

README.md

Common-Data-Model / Impala

This folder contains the SQL scripts for Impala.

In order to create your instantiation of the Common Data Model, we recommend following these steps:

Create an empty schema.

impala-shell -q 'CREATE DATABASE omop_cdm'

Execute the script OMOP_CDM_ddl_Impala.sql to create the tables and fields.

impala-shell -d omop_cdm -f OMOP_CDM_ddl_Impala.sql

Load your data into the schema.

a. Load the vocabulary tables.

First, download the data from http://www.ohdsi.org/web/athena/ and unzip into a cdmv5vocab directory, then run

hadoop fs -put cdmv5vocab cdmv5vocab
hadoop fs -chmod +w cdmv5vocab
impala-shell -d omop_cdm -f VocabImport/OMOP_CDM_vocabulary_load_Impala.sql --var=OMOP_VOCAB_PATH=/user/$USER/cdmv5vocab

b. Load the patient data.

For example, download the 1000 person sample of simulated CMS SynPUF patient data from http://www.ltscomputingllc.com/downloads/ and unzip into a synpuf directory, then run

hadoop fs -put synpuf synpuf
hadoop fs -chmod +w synpuf
impala-shell -d omop_cdm -f DataImport/OMOP_CDM_synpuf_load_Impala.sql --var=OMOP_SYNPUF_PATH=/user/$USER/synpuf

Convert to Parquet format.

impala-shell -q 'CREATE DATABASE omop_cdm_parquet'
impala-shell -f OMOP_Parquet.sql

Run simple queries to sanity check.

impala-shell -d omop_cdm_parquet -q 'SELECT COUNT(1) FROM concept'
impala-shell -d omop_cdm_parquet -q 'SELECT COUNT(1) FROM person'