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Posted to issues@arrow.apache.org by "Igor Suhorukov (Jira)" <ji...@apache.org> on 2022/09/06 13:58:00 UTC

[jira] [Created] (ARROW-17629) Bind DB column to Arrow Map type in JdbcToArrowUtils

Igor Suhorukov created ARROW-17629:
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             Summary: Bind DB column to Arrow Map type in JdbcToArrowUtils
                 Key: ARROW-17629
                 URL: https://issues.apache.org/jira/browse/ARROW-17629
             Project: Apache Arrow
          Issue Type: New Feature
          Components: Java
    Affects Versions: 9.0.0
            Reporter: Igor Suhorukov


I want to convert into Apache Arrow IPC data format in Java existing data from PostgreSQL database.

[JdbcToArrowUtils.jdbcToArrowSchema|https://github.com/apache/arrow/blob/50a7d15dfb4cbc4dd449ff2bb3ba2b1cde62a3ab/java/adapter/jdbc/src/main/java/org/apache/arrow/adapter/jdbc/JdbcToArrowUtils.java#L111] allows do it for scalar types and arrays.

org.postgresql.jdbc.PgResultSetMetaData instance from PostgreSQL jdbc driver provide all required info related to column types pgResultSetMetaData.getColumnTypeName().

But looks like current implementation support only [ArrowType.List|https://github.com/apache/arrow/blob/50a7d15dfb4cbc4dd449ff2bb3ba2b1cde62a3ab/java/adapter/jdbc/src/main/java/org/apache/arrow/adapter/jdbc/JdbcToArrowUtils.java#L266] with no support of Map type mapping in code



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