json Many-to-one mapping#220
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QQhuxuhui wants to merge 1 commit intorcongiu:developfrom
QQhuxuhui:develop
Open
json Many-to-one mapping#220QQhuxuhui wants to merge 1 commit intorcongiu:developfrom QQhuxuhui:develop
QQhuxuhui wants to merge 1 commit intorcongiu:developfrom
QQhuxuhui:develop
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I encountered the problem of merging different JSON data sources，I solved the problem of mapping different data source fields in the following way：
different field names of source json data are mapped to the same field of the Hive table
configure：
`create external table TEST(
col1 string,
col2 string,
col3 string
)
partitioned by (dt int)
ROW FORMAT SERDE 'org.openx.data.jsonserde.JsonSerDe'
with serdeproperties(
"mapping.col1" = "key1|key2|key3"
)
`
Although key1,key2 and key3 come from different data sources, it represents the same data meaning. By configuring,they will be mapped to col1