[jira] [Created] (ARROW-5601) [gandiva] Error when projector with a string field

["Sun Chenggen (JIRA)" <ji...@apache.org>]

Sun Chenggen created ARROW-5601:
-----------------------------------

             Summary: [gandiva] Error when projector with a string field
                 Key: ARROW-5601
                 URL: https://issues.apache.org/jira/browse/ARROW-5601
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++ - Gandiva
    Affects Versions: 0.13.0
         Environment: Ubuntu 16.04 x86_64
            Reporter: Sun Chenggen


when I try to select a string field by {{gandiva}} projector, it failed with errors.
{code:python}
import pandas as pd
import pyarrow as pa
from pyarrow import gandiva

a = pd.DataFrame({'col1': ["asdf", "abc"]})
tb = pa.Table.from_pandas(a)
teb = gandiva.TreeExprBuilder()
col1 = tb.schema[0]
node1 = teb.make_field(col1)
exp1 = teb.make_expression(node1, col1)
gandiva.make_projector(tb.schema, [exp1], pa.default_memory_pool())
{code}
Run the code above, it crashs with error like this:
{code:bash}

python: ../lib/IR/Instructions.cpp:1202: void llvm::StoreInst::AssertOK(): Assertion `getOperand(0)->getType() == cast<PointerType>(getOperand(1)->getType())->getElementType() && "Ptr must be a pointer to Val type!"' failed. Aborted
{code}



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