el-autocomplete in el-table inline suggestion.

inline-el-autocomplete.vue

<template lang="pug">
el-table(:data="data" border)
  el-table-column(label="批次")
    template(scope="scope")
      el-autocomplete(v-model="scope.row.rowTempModel.batch" :maxlength="50" style="width:100%;"
        :fetch-suggestions="(queryString, cb) => {\
          searchBatchOpt(scope.row, scope.$index).then(batchs => { \
            let suggestions = batchs.map(batch => ({value: batch})); \
            queryString ? cb(suggestions.filter(suggestion => suggestion.value.indexOf(queryString) > -1)) : cb(suggestions.slice(0,6))\
          });\
        }")
</template>

<script>
import { listMaterialBatch } from '@/xhr'; 

export default {
  data() {
    return {
      data: []
    }
  },
  methods: {
    searchBatchOpt(row, index) {
      return new Promise((resolve, reject) => {
        if (!row.rowTempModel.batchOpts) {
          listMaterialBatch({materialId: row.id}).then(({data}) => {
            row.rowTempModel.batchOpts = data.data.data.sort((x, y) => y.id - x.id).map(item => item.batch);
            resolve(row.rowTempModel.batchOpts);
          });
        } else {
          resolve(row.rowTempModel.batchOpts);
        }
      });
    }
  }
}
</script>

You need listMaterialBatch function and element-ui to run it.