Commits
Mike Pigott authored and Pindikura Ravindra committed 5aaf700e968
ARROW-4142: [Java] JDBC Array -> Arrow ListVector https://issues.apache.org/jira/browse/ARROW-4142 This adds support for reading JDBC arrays and converting them to Arrow ListVectors. JDBC does not provide a great way to get the array type; there is a ResultSet object for walking the array, but its ResultSetMetaData may not contain the right value type (H2, for example, returns a JDBC type of NULL). This is based on #3134, which includes ARROW-3965 and ARROW-3966. I found Arrow arrays to be very confusing, and I am not sure if I am using them correctly here. One thing I noticed was if I added a null array to a ListVector of VarCharVectors, the next value in the VarCharVector would be empty. I would appreciate any help on why! The ListVector unit tests weren't very helpful. For all other cases, this code seems to work. I look forward to your review! Author: Mike Pigott <mpigott@gmail.com> Closes #3294 from mikepigott/jdbc-array-field and squashes the following commits: 66376dda <Mike Pigott> Support for reading Array records to ListVector from JDBC