Thanks Wes. I was using 0.14 before. BTW, it seems the doc for data types didn't updated fully. I'll submit a PR for this.
On Thu, Feb 13, 2020 at 12:28 AM Wes McKinney <wesmck...@gmail.com> wrote: > It was added between 0.15.0 and 0.16.0. Any feedback from using it > would be welcome > > > https://github.com/apache/arrow/commit/e0c1ffe9c38d1759f1b5311f95864b0e2a406c51 > > On Wed, Feb 12, 2020 at 5:12 AM Shawn Yang <shawn.ck.y...@gmail.com> > wrote: > > > > Thanks François, I didn't find it in pyarrow. I'll check again. > > > > On Fri, Feb 7, 2020 at 9:18 PM Francois Saint-Jacques < > > fsaintjacq...@gmail.com> wrote: > > > > > Arrow does have a Map type [1][2][3]. It is represented as a list of > pairs. > > > > > > François > > > > > > [1] > > > > https://github.com/apache/arrow/blob/762202418541e843923b8cae640d15b4952a0af6/format/Schema.fbs#L60-L87 > > > [2] > > > > https://github.com/apache/arrow/blob/762202418541e843923b8cae640d15b4952a0af6/cpp/src/arrow/type.h#L691-L719 > > > [3] > > > > https://github.com/apache/arrow/blob/762202418541e843923b8cae640d15b4952a0af6/java/vector/src/main/java/org/apache/arrow/vector/complex/MapVector.java#L36-L47 > > > > > > On Fri, Feb 7, 2020 at 3:55 AM Shawn Yang <shawn.ck.y...@gmail.com> > wrote: > > > > > > > > Hi guys, > > > > I'm writing an cross-language row-oriented serialization framework > mainly > > > > for java/python for now. I detained many data types and schema, > field, > > > such > > > > as Byte, short, int, long, double, float, map, array, struct,. But > then I > > > > find using Arrow schema is a better choice. Since my framework need > to > > > > support conversion between my row-format and arrow columnar format. > If I > > > do > > > > all it by myself, I need to support schema conversion and schema > > > > serialization. Which is not necessary if I use arrow schema. > > > > > > > > But I find that arrow doesn't have a map data type, which is I needed > > > > exactly. I know I can use struct to mock it or ExtensionType for it. > But > > > > it's not very convenient. So I want to know whether will Map type > be > > > > supported by arrow? > > > > > > > > Thanks. Regards > > > >
