[
https://issues.apache.org/jira/browse/BEAM-13242?focusedWorklogId=681743&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-681743
]
ASF GitHub Bot logged work on BEAM-13242:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Nov/21 22:21
Start Date: 15/Nov/21 22:21
Worklog Time Spent: 10m
Work Description: borovikovd opened a new pull request #15982:
URL: https://github.com/apache/beam/pull/15982
This is a fix for IllegalArgumentException that happens during reading of a
numeric column. The issue is following: say you have a numeric field with
precision 15 and scale 2. When JdbcIO reads values they might have smaller
precision, say 6. I loosen the check so if the precision and the scale are less
or equal than defined for a column we allow it.
------------------------
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`ValidatesRunner` compliance status (on master branch)
--------------------------------------------------------
<table>
<thead>
<tr>
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<th>Flink</th>
<th>Samza</th>
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<tr>
<td>Python</td>
<td>---</td>
<td>---</td>
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<td>---</td>
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<td>XLang</td>
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Issue Time Tracking
-------------------
Worklog Id: (was: 681743)
Time Spent: 20m (was: 10m)
> IllegalArgumentException while reading a Numeric column with a fixed precision
> ------------------------------------------------------------------------------
>
> Key: BEAM-13242
> URL: https://issues.apache.org/jira/browse/BEAM-13242
> Project: Beam
> Issue Type: Bug
> Components: io-java-jdbc
> Affects Versions: 2.33.0
> Environment: openjdk version "11.0.10" 2021-01-19
> macOS 11.1
> Reporter: Denis
> Priority: P1
> Time Spent: 20m
> Remaining Estimate: 0h
>
> *Error*
>
> I am trying to read a table in a Postgresql database. One of columns has a
> type definition
> {code:java}
> Numeric(15, 2){code}
>
> At runtime I am getting:
> {code:java}
> Caused by: java.lang.IllegalArgumentException: Expected BigDecimal base to be
> null or have precision = 15 (was 6), scale = 2 (was 2) at
> org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Preconditions.checkArgument(Preconditions.java:477)
> at
> org.apache.beam.sdk.io.jdbc.LogicalTypes$FixedPrecisionNumeric.toInputType(LogicalTypes.java:268)
> at
> org.apache.beam.sdk.io.jdbc.LogicalTypes$FixedPrecisionNumeric.toInputType(LogicalTypes.java:246)
> at
> org.apache.beam.sdk.io.jdbc.SchemaUtil.lambda$createLogicalTypeExtractor$ca0ab2ec$1(SchemaUtil.java:289)
> at
> org.apache.beam.sdk.io.jdbc.SchemaUtil$BeamRowMapper.mapRow(SchemaUtil.java:354)
> at
> org.apache.beam.sdk.io.jdbc.SchemaUtil$BeamRowMapper.mapRow(SchemaUtil.java:332)
> at
> org.apache.beam.sdk.io.jdbc.JdbcIO$ReadFn.processElement(JdbcIO.java:1172)
> {code}
>
> It seems that when JdbcIO reads a numeric column it might have smaller
> precision/scale than defined in DDL.
>
> *How to reproduce*
>
> {code:java}
> import org.apache.beam.sdk.io.jdbc.JdbcIO
> import org.apache.beam.sdk.testing.PAssert
> import org.apache.beam.sdk.testing.TestPipeline
> import org.apache.beam.sdk.transforms.MapElements
> import org.apache.beam.sdk.transforms.ProcessFunction
> import org.apache.beam.sdk.values.TypeDescriptors
> import org.junit.AfterClass
> import org.junit.BeforeClass
> import org.junit.Test
> import org.testcontainers.containers.PostgreSQLContainer
> import java.math.BigDecimal
> import java.sql.Connection
> import java.sql.DriverManager
> class PostgresNumericBugTest {
> companion object {
> val pgContainer = PostgreSQLContainer<Nothing>("postgres:14.0")
> @BeforeClass
> @JvmStatic
> fun start() {
> pgContainer.start()
> getConnection().use {
> val stmt = it.createStatement()
> stmt.execute(
> """create table account (
> id integer not null primary key,
> balance numeric(15, 2)
> )
> """.trimIndent()
> )
> stmt.execute("insert into account(id, balance) values(1,
> 5755.94)")
> }
> }
> @AfterClass
> @JvmStatic
> fun stop() {
> pgContainer.stop()
> }
> private fun getConnection(): Connection {
> return DriverManager.getConnection(
> pgContainer.jdbcUrl, pgContainer.username,
> pgContainer.password
> )
> }
> private fun getDataSourceConfiguration():
> JdbcIO.DataSourceConfiguration =
> JdbcIO.DataSourceConfiguration.create(
> pgContainer.driverClassName,
> pgContainer.jdbcUrl
> )
> .withUsername(pgContainer.username)
> .withPassword(pgContainer.password)
> }
> @Test
> fun readNumeric() {
> val pipeline =
> TestPipeline.create().enableAbandonedNodeEnforcement(false)
> val pBalance = pipeline
> .apply(
> "Read Account from DB",
> JdbcIO
> .readRows()
> .withQuery("select balance from account")
> .withDataSourceConfiguration(getDataSourceConfiguration())
> )
> .apply(
> "Get Balance",
>
> MapElements.into(TypeDescriptors.bigdecimals()).via(ProcessFunction {
> it.getDecimal(0) })
> )
> PAssert.that(pBalance).containsInAnyOrder(BigDecimal("5755.94"))
> pipeline.run()
> }
> }
> {code}
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