Add concat_column in ElasticDL feature column#1719

Merged

brightcoder01 merged 6 commits intosql-machine-learning:developfrom

brightcoder01:gml/add-concat-column

Feb 20, 2020

Commits on Feb 9, 2020

Add concat_column in elasticdl feature column
mingliang.gml
committed

Commits on Feb 10, 2020

Update the output type of concat_column from tf.int32 to tf.int64
mingliang.gml
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Add the placeholder for concat_column test case
mingliang.gml
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Add test case for concat_column
mingliang.gml
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Commits on Feb 11, 2020

Add the syntax example for wide and deep model
mingliang.gml
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Commits on Feb 15, 2020

Merge with develop and resolve conflicts
brightcoder01
committed