spark.sql not working on EMR (Serverless)

Question

The following script does not create the table in the S3 location indicated by the query. 
I tested it locally and the Delta Json file is created and contains the information about the created table.

```
from pyspark.sql import SparkSession

spark = (SparkSession
    .builder
    .enableHiveSupport()
    .appName('omop_ddl')
    .getOrCreate()
    )

spark.sql(f"""
CREATE
OR REPLACE TABLE CONCEPT (
  CONCEPT_ID LONG,
  CONCEPT_NAME STRING,
  DOMAIN_ID STRING,
  VOCABULARY_ID STRING,
  CONCEPT_CLASS_ID STRING,
  STANDARD_CONCEPT STRING,
  CONCEPT_CODE STRING,
  VALID_START_DATE DATE,
  VALID_END_DATE DATE,
  INVALID_REASON STRING
) USING DELTA
LOCATION 's3a://ls-dl-mvp-s3deltalake/health_lakehouse/silver/concept';
""")
```

The configuration parameters are the following ones:

```
--conf spark.jars=s3a://ls-dl-mvp-s3development/spark_jars/delta-core_2.12-2.1.0.jar,s3a://ls-dl-mvp-s3development/spark_jars/delta-storage-2.1.0.jar 
--conf spark.executor.cores=1 
--conf spark.executor.memory=4g 
--conf spark.driver.cores=1 
--conf spark.driver.memory=4g 
--conf spark.executor.instances=1 
```
I tried to modify the location in the query by inserting a non-existent bucket and the script did not go into error. Am I forgetting something?
Thank you very much for your help

Jen_F · Answer

Hi anselboro,

For the version you are using, additional configuration is required for EMR Serverless with Delta Lake according to the [EMR Serverless Delta Lake documentation](https://docs.aws.amazon.com/emr/latest/EMR-Serverless-UserGuide/using-delta-lake.html).

If you can provide which EMR version you are using, I can provide more specific configuration steps for that version.

**For EMR 6.9.0 and higher (Delta Lake included):**

```bash
--conf spark.jars=/usr/share/aws/delta/lib/delta-core.jar,/usr/share/aws/delta/lib/delta-storage.jar
--conf spark.sql.extensions=io.delta.sql.DeltaSparkSessionExtension
--conf spark.sql.catalog.spark_catalog=org.apache.spark.sql.delta.catalog.DeltaCatalog
```

**For EMR 7.0.0 and higher (Delta Lake 3.0.0+):**

```bash
--conf spark.jars=/usr/share/aws/delta/lib/delta-spark.jar,/usr/share/aws/delta/lib/delta-storage.jar
--conf spark.sql.extensions=io.delta.sql.DeltaSparkSessionExtension
--conf spark.sql.catalog.spark_catalog=org.apache.spark.sql.delta.catalog.DeltaCatalog
```

### What You're Missing

Your current configuration:
```bash
--conf spark.jars=s3a://ls-dl-mvp-s3development/spark_jars/delta-core_2.12-2.1.0.jar,s3a://ls-dl-mvp-s3development/spark_jars/delta-storage-2.1.0.jar
```

**Missing configurations:**
```bash
--conf spark.sql.extensions=io.delta.sql.DeltaSparkSessionExtension
--conf spark.sql.catalog.spark_catalog=org.apache.spark.sql.delta.catalog.DeltaCatalog
```

Without these, Spark doesn't register the Delta catalog plugin, so `USING DELTA` is not recognized.

Thank you.

spark.sql not working on EMR (Serverless)

What You're Missing

답변 추가

관련 콘텐츠