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How to insert data into this table

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Rising Star

I have this table with what I believe is a nested column.

I created this table with the statement :

create table testtbl stored as AVRO TBLPROPERTIES ('avro.schema.url'='hdfs://testhost:8020/tmp/avroschemas/testtbl.json');

testtbl.json looks like :

{

"type" : "record",

"name" : "testtbl",

"namespace" : "orgn.data.domain",

"fields" : [ {

"name" : "id",

"type" : {

"type" : "record",

"name" : "Key",

"fields" : [ {

"name" : "TId",

"type" : "string"

}, {

"name" : "action",

"type" : "string"

}, {

"name" : "createdTS",

"type" : {

"type" : "long",

"logicalType" : "timestamp-millis"

}

} ]

}

}, {

"name" : "CId",

"type" : "string"

}, {

"name" : "ANumber",

"type" : "string"

} ]

}

Can somebody give me a valid insert statement to insert one row into the table.

Appreciate the help.

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Expert Contributor
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17 REPLIES 17

avatar
Rising Star

so is there no way to load the data automatically from the files coming into a particular directory in hdfs?

avatar
Expert Contributor

you can create external table with location & write the text files directly on that path.

eg., create external table staging1(id struct<tid:string,action:string,createdts:timestamp>, cid string, anumber string) row format delimited fields terminated by ',' collection items terminated by '|' stored as textfile LOCATION '/tmp/staging/';

All text files can be directly written at /tmp/staging/ by kafka or flume

If Kafka or flume will be able to generate Avro files, then you can skip the staging table & create external avro table & write avro files directly on to external table location.

avatar
Rising Star

naresh, you are the man!!! thanks so much!!!

avatar
Rising Star

any idea what is wrong with this :

CREATE EXTERNAL TABLE staging3

ROW FORMAT SERDE 'org.apache.hadoop.hive.serd2.avro.AvroSerDe'

STORED AS INPUTFORMAT 'org.apache.hadoop.hive.ql.io.avro.AvroContainerInputFormat'

OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.avro.AvroContainerOutputFormat'

TBLPROPERTIES ('avro.schema.url'='hdfs:///tmp/avroschemas/testtbl.json')

LOCATION '/tmp/staging';

I am getting :

FAILED: ParseException line 7:0 missing EOF at 'LOCATION' near ')'

avatar
Expert Contributor

@n c

its because that TBLPROPERTIES should the last one, use the below and it should help:

+++++++++++++++++

CREATE EXTERNAL TABLE staging3

ROW FORMAT SERDE 'org.apache.hadoop.hive.serd2.avro.AvroSerDe'

STORED AS INPUTFORMAT 'org.apache.hadoop.hive.ql.io.avro.AvroContainerInputFormat'

OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.avro.AvroContainerOutputFormat'

LOCATION '/tmp/staging'

TBLPROPERTIES ('avro.schema.url'='hdfs:///tmp/avroschemas/testtbl.json');

+++++++++++++++++

avatar
Rising Star

so with a table created as above, how should the data be to be able to load it in? in what format that is? because i am not specifying any delimiters etc. appreciate the insights.

avatar
Rising Star

@Mahesh Balakrishnan @Naresh P R @Shu

can i have feedback on how the data should be formatted to be loaded (load inpath command) into a table created as :

CREATE EXTERNAL TABLE staging3

ROW FORMAT SERDE 'org.apache.hadoop.hive.serd2.avro.AvroSerDe'

STORED AS INPUTFORMAT 'org.apache.hadoop.hive.ql.io.avro.AvroContainerInputFormat'

OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.avro.AvroContainerOutputFormat'

LOCATION '/tmp/staging'

TBLPROPERTIES ('avro.schema.url'='hdfs:///tmp/avroschemas/testtbl.json');

The schema is the same as described earlier. But there is no delimiter specified.

Appreciate if you could provide a sample piece of data for this.

avatar
Expert Contributor

There are multiple ways to populate avro tables.

1) Insert into avro_table values(<col1>,<col2>..,<colN>) -- This way hive will write avro files.

2) Generating avro files & copying directly to '/tmp/staging', You can read avro documentation to write avro files directly into hdfs path. Avro Reader/Writer APIs will take care of storing & retrieving records, we don't need to explicitly specify delimiters for avro files.