hoge_column=`aws dynamodb scan \ --table-name hoge-table \ --filter-expression 'hoge_bar = :g' \ --expression-attribute-values '{ ":g": {"S":"ほげたろ"} }'
これでJSON返ってくる
それ使う
hoge_column=`aws dynamodb scan \ --table-name hoge-table \ --filter-expression 'hoge_bar = :g' \ --expression-attribute-values '{ ":g": {"S":"ほげたろ"} }' | jq '.Items[0].hoge_column.S'` echo $hoge_column
aws dynamodb scan \ --table-name bar-table \ --filter-expression 'hoge_fuga = :g' \ --expression-attribute-values '{ ":g": {"S":'${hoge_column}'} }'