[arrow-datafusion] branch master updated: python: fix generated table name in dataframe creation (#1078)

[houqp]

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houqp pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/arrow-datafusion.git


The following commit(s) were added to refs/heads/master by this push:
     new 91a677c  python: fix generated table name in dataframe creation (#1078)
91a677c is described below

commit 91a677c074e968be21fa4ef304de4b918dbb5a92
Author: QP Hou <q...@scribd.com>
AuthorDate: Mon Oct 11 21:50:43 2021 -0700

    python: fix generated table name in dataframe creation (#1078)
---
 .github/workflows/python_test.yaml | 2 +-
 python/src/context.rs              | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/python_test.yaml 
b/.github/workflows/python_test.yaml
index b2d8551..5419adb 100644
--- a/.github/workflows/python_test.yaml
+++ b/.github/workflows/python_test.yaml
@@ -56,7 +56,7 @@ jobs:
           source venv/bin/activate
           cd python
           maturin develop
-          pytest -v .
+          RUST_BACKTRACE=1 pytest -v .
         env:
           CARGO_HOME: "/home/runner/.cargo"
           CARGO_TARGET_DIR: "/home/runner/target"
diff --git a/python/src/context.rs b/python/src/context.rs
index 4d48556..4c47058 100644
--- a/python/src/context.rs
+++ b/python/src/context.rs
@@ -83,8 +83,9 @@ impl ExecutionContext {
             errors::wrap(MemTable::try_new(partitions[0][0].schema(), 
partitions))?;
 
         // generate a random (unique) name for this table
-        let name = rand::thread_rng()
-            .sample_iter(&Alphanumeric)
+        // table name cannot start with numeric digit
+        let name = std::iter::once('c')
+            .chain(rand::thread_rng().sample_iter(&Alphanumeric))
             .take(10)
             .collect::<String>();