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Posted to issues@flink.apache.org by "Kurt Young (Jira)" <ji...@apache.org> on 2019/12/03 02:21:00 UTC
[jira] [Updated] (FLINK-14987) JDBCTableSource can't support
DataTypes.DECIMAL
[ https://issues.apache.org/jira/browse/FLINK-14987?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kurt Young updated FLINK-14987:
-------------------------------
Fix Version/s: 1.10.0
> JDBCTableSource can't support DataTypes.DECIMAL
> -----------------------------------------------
>
> Key: FLINK-14987
> URL: https://issues.apache.org/jira/browse/FLINK-14987
> Project: Flink
> Issue Type: Bug
> Components: Connectors / JDBC, Table SQL / API
> Affects Versions: 1.9.0, 1.9.1
> Reporter: Dezhi Cai
> Priority: Blocker
> Fix For: 1.10.0
>
>
>
> sample code 1 fail with ValidationException. After investigation, i find that the root cause may be related to the conversion between DecimalType and TypeInformation<BigDecimal>, please see sample code 2.
>
> sampe code 1:
> {code:java}
> public static void main(String[] args) {
> JDBCOptions options = JDBCOptions.builder()
> .setDBUrl("jdbc:mysql://127.0.0.1/test")
> .setTableName("table1")
> .setDriverName("com.mysql.jdbc.Driver")
> .setUsername("root")
> .setPassword("password")
> .build();
> TableSchema schema = TableSchema.builder()
> .field("a", DataTypes.INT())
> .field("b", DataTypes.BIGINT())
> .field("c", DataTypes.FLOAT())
> .field("d", DataTypes.DOUBLE())
> .field("e", DataTypes.DECIMAL(24,3))
> .field("f", DataTypes.TIMESTAMP(3))
> .build();
> JDBCTableSource source = JDBCTableSource.builder()
> .setOptions(options)
> .setSchema(schema)
> .build();
> TableSourceValidation.validateTableSource(source);
> }
> {code}
> Exception in thread "main" org.apache.flink.table.api.ValidationException: Type DECIMAL(24, 3) of table field 'LEGACY(BigDecimal)' does not match with type 'e; of the field 'LEGACY(BigDecimal)' of the TableSource return type.Exception in thread "main" org.apache.flink.table.api.ValidationException: Type DECIMAL(24, 3) of table field 'LEGACY(BigDecimal)' does not match with type 'e; of the field 'LEGACY(BigDecimal)' of the TableSource return type. at org.apache.flink.table.sources.TableSourceValidation.validateLogicalTypeEqualsPhysical(TableSourceValidation.java:184) at org.apache.flink.table.sources.TableSourceValidation.validateLogicalToPhysicalMapping(TableSourceValidation.java:156) at org.apache.flink.table.sources.TableSourceValidation.validateTableSource(TableSourceValidation.java:69) at com.moodys.demo.Demo.main(Demo.java:43)
>
> sample code 2 :
> {code:java}
> public static void main(String[] args) {
> DataType originalDataType = DataTypes.DECIMAL(24,3);
> TypeInformation legacyType = LegacyTypeInfoDataTypeConverter.toLegacyTypeInfo(originalDataType);
> DataType dataType = LegacyTypeInfoDataTypeConverter.toDataType(legacyType);
> System.out.println(originalDataType.equals(dataType));
> }
> // output: false{code}
>
>
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