@Andrew Pilloud<mailto:apill...@google.com> thanks for your suggestions. I 
tried CAST and TRIM but it did not work:

Sql Stmt I am using: SELECT 'CAST(id AS VARCHAR)' FROM PCOLLECTION

Logs:

[main] INFO org.apache.beam.sdk.extensions.sql.impl.CalciteQueryPlanner - SQL:
SELECT 'CAST(id AS VARCHAR)'
FROM `beam`.`PCOLLECTION` AS `PCOLLECTION`
[main] INFO org.apache.beam.sdk.extensions.sql.impl.CalciteQueryPlanner - 
SQLPlan>
LogicalProject(EXPR$0=['CAST(id AS VARCHAR)'])
  BeamIOSourceRel(table=[[beam, PCOLLECTION]])

[main] INFO org.apache.beam.sdk.extensions.sql.impl.CalciteQueryPlanner - 
BEAMPlan>
BeamCalcRel(expr#0..44=[{inputs}], expr#45=['CAST(id AS VARCHAR)'], 
EXPR$0=[$t45])
  BeamIOSourceRel(table=[[beam, PCOLLECTION]])

Exception in thread "main" java.lang.RuntimeException: Unhandled logical type 
SqlCharType
                at 
org.apache.beam.sdk.schemas.utils.AvroUtils.getFieldSchema(AvroUtils.java:911)
                at 
org.apache.beam.sdk.schemas.utils.AvroUtils.toAvroField(AvroUtils.java:306)
                at 
org.apache.beam.sdk.schemas.utils.AvroUtils.toAvroSchema(AvroUtils.java:341)
                at 
org.apache.beam.sdk.schemas.utils.AvroUtils.toAvroSchema(AvroUtils.java:348)

From: Andrew Pilloud <apill...@google.com>
Reply-To: "user@beam.apache.org" <user@beam.apache.org>
Date: Monday, May 10, 2021 at 7:46 PM
To: user <user@beam.apache.org>
Cc: Yuan Feng <yua...@zillowgroup.com>
Subject: Re: A problem with calcite sql

For the first one you have 
https://issues.apache.org/jira/browse/BEAM-5251<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fissues.apache.org%2Fjira%2Fbrowse%2FBEAM-5251&data=04%7C01%7Ctaol%40zillow.com%7Cd0d024cf363d4a0df9a708d914270a8b%7C033464830d1840e7a5883784ac50e16f%7C0%7C0%7C637562980181312070%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=QGT5TNbR17Bb2T2MjBVxD7mfxzIe4XG9%2Bfgr%2BjBvRzY%3D&reserved=0>
For the second, I opened a new issue for you: 
https://issues.apache.org/jira/browse/BEAM-12323<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fissues.apache.org%2Fjira%2Fbrowse%2FBEAM-12323&data=04%7C01%7Ctaol%40zillow.com%7Cd0d024cf363d4a0df9a708d914270a8b%7C033464830d1840e7a5883784ac50e16f%7C0%7C0%7C637562980181322031%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=BZ1y7IQcb5Hw93b%2BcrZpe6G%2BDw3E0KcPUDuxjWuV%2BDw%3D&reserved=0>

Your second issue is because our Avro conversion library doesn't know how to 
handle fixed length strings. These normally show up in SQL when you are 
outputting a constant. I'm not sure exactly how to work around it, if you can 
get the output type to be a VARCHAR (instead of CHAR) this problem will go 
away. You might be able to do something like 'CAST("Your String Literal" AS 
VARCHAR)' , 'TRIM("Your String Literal")' or ' "Your String Literal" || "" '.

On Mon, May 10, 2021 at 7:25 PM Tao Li 
<t...@zillow.com<mailto:t...@zillow.com>> wrote:
Sorry to bug with another question. I was saving a data set with below schema 
(this dataset comes from sql query). Saw the SqlCharType issue. Did anyone see 
this issue before?

[main] INFO com.zillow.pipeler.core.transform.DatasetFlattenerCore - Fields:
Field{name=id, description=, type=LOGICAL_TYPE NOT NULL, options={{}}}
Field{name=user_tmp, description=, type=LOGICAL_TYPE NOT NULL, options={{}}}
Field{name=market_name, description=, type=LOGICAL_TYPE NOT NULL, options={{}}}
Field{name=market_transactionManagement_transactionManagers_email, 
description=, type=LOGICAL_TYPE NOT NULL, options={{}}}
Field{name=market_transactionManagement_transactionManagers_name, description=, 
type=LOGICAL_TYPE NOT NULL, options={{}}}
Field{name=market_transactionManagement_transactionProfileId, description=, 
type=LOGICAL_TYPE NOT NULL, options={{}}}
Options:{{}}
Exception in thread "main" java.lang.RuntimeException: Unhandled logical type 
SqlCharType
                at 
org.apache.beam.sdk.schemas.utils.AvroUtils.getFieldSchema(AvroUtils.java:911)
                at 
org.apache.beam.sdk.schemas.utils.AvroUtils.toAvroField(AvroUtils.java:306)
                at 
org.apache.beam.sdk.schemas.utils.AvroUtils.toAvroSchema(AvroUtils.java:341)
                at 
org.apache.beam.sdk.schemas.utils.AvroUtils.toAvroSchema(AvroUtils.java:348)


From: Tao Li <t...@zillow.com<mailto:t...@zillow.com>>
Reply-To: "user@beam.apache.org<mailto:user@beam.apache.org>" 
<user@beam.apache.org<mailto:user@beam.apache.org>>
Date: Monday, May 10, 2021 at 7:19 PM
To: "user@beam.apache.org<mailto:user@beam.apache.org>" 
<user@beam.apache.org<mailto:user@beam.apache.org>>
Cc: Yuan Feng <yua...@zillowgroup.com<mailto:yua...@zillowgroup.com>>
Subject: Re: A problem with calcite sql

Never mind. Looks like “user” is a reserved name.

From: Tao Li <t...@zillow.com<mailto:t...@zillow.com>>
Reply-To: "user@beam.apache.org<mailto:user@beam.apache.org>" 
<user@beam.apache.org<mailto:user@beam.apache.org>>
Date: Monday, May 10, 2021 at 7:10 PM
To: "user@beam.apache.org<mailto:user@beam.apache.org>" 
<user@beam.apache.org<mailto:user@beam.apache.org>>
Cc: Yuan Feng <yua...@zillowgroup.com<mailto:yua...@zillowgroup.com>>
Subject: A problem with calcite sql

Hi Beam community,

I am seeing a weird issue by using calcite sql. I don’t understand why it’s 
complaining my query is not valid. Once I removed “user AS user”, it worked 
fine. Please advise. Thanks.

Exception in thread "main" 
org.apache.beam.sdk.extensions.sql.impl.ParseException: Unable to parse query 
SELECT id AS id, user AS user, market_name AS market_name, 
market_transactionManagement_transactionManagers.email AS 
market_transactionManagement_transactionManagers_email, 
market_transactionManagement_transactionManagers.name AS 
market_transactionManagement_transactionManagers_name, 
market_transactionManagement_transactionProfileId AS 
market_transactionManagement_transactionProfileId FROM PCOLLECTION
                at 
org.apache.beam.sdk.extensions.sql.impl.CalciteQueryPlanner.convertToBeamRel(CalciteQueryPlanner.java:214)
                at 
org.apache.beam.sdk.extensions.sql.impl.BeamSqlEnv.parseQuery(BeamSqlEnv.java:111)
                at 
org.apache.beam.sdk.extensions.sql.SqlTransform.expand(SqlTransform.java:171)
                at 
org.apache.beam.sdk.extensions.sql.SqlTransform.expand(SqlTransform.java:109)
                at org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:547)
                at 
org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:498)
                at 
org.apache.beam.sdk.values.PCollection.apply(PCollection.java:370)
                at 
com.zillow.pipeler.core.transform.DatasetFlattenerCore.updateSchemaBasedOnAvroSchema(DatasetFlattenerCore.java:85)
                at 
com.zillow.pipeler.core.transform.DatasetFlattenerCore.execute(DatasetFlattenerCore.java:61)
                at 
com.zillow.pipeler.core.transform.DatasetFlattenerCore.execute(DatasetFlattenerCore.java:29)
                at 
com.zillow.pipeler.orchestrator.BaseOrchestrator.run(BaseOrchestrator.java:61)
                at 
com.zillow.pipeler.orchestrator.transform.DatasetFlattenerOrchestrator.main(DatasetFlattenerOrchestrator.java:71)
Caused by: 
org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.sql.parser.SqlParseException:
 Encountered "AS user" at line 1, column 23.
Was expecting one of:
    <EOF>
    "ORDER" ...
    "LIMIT" ...

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