d0ad381833
* test: add spark query unit test and check grammar * test: add select explain、lateralSubQuery、transform unit test * chore: fileName exchange --------- Co-authored-by: dilu <dilu@dtstack.com>
52 lines
1.4 KiB
SQL
52 lines
1.4 KiB
SQL
-- SELECT TRANSFORM ( expression [ , ... ] )
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-- [ ROW FORMAT row_format ]
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-- [ RECORDWRITER record_writer_class ]
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-- USING command_or_script [ AS ( [ col_name [ col_type ] ] [ , ... ] ) ]
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-- [ ROW FORMAT row_format ]
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-- [ RECORDREADER record_reader_class ]
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-- With specified output without data type
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SELECT TRANSFORM(zip_code, name, age)
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USING 'cat' AS (a, b, c)
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FROM person
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WHERE zip_code > 94511;
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-- With specified output with data type
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SELECT TRANSFORM(zip_code, name, age)
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USING 'cat' AS (a STRING, b STRING, c STRING)
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FROM person
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WHERE zip_code > 94511;
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-- Using ROW FORMAT DELIMITED
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SELECT TRANSFORM(name, age)
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ROW FORMAT DELIMITED
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FIELDS TERMINATED BY ','
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LINES TERMINATED BY '\n'
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NULL DEFINED AS 'NULL'
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USING 'cat' AS (name_age string)
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ROW FORMAT DELIMITED
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FIELDS TERMINATED BY '@'
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LINES TERMINATED BY '\n'
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NULL DEFINED AS 'NULL'
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FROM person;
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-- Using Hive Serde
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SELECT TRANSFORM(zip_code, name, age)
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ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
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WITH SERDEPROPERTIES (
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'field.delim' = '\t'
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)
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USING 'cat' AS (a STRING, b STRING, c STRING)
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ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
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WITH SERDEPROPERTIES (
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'field.delim' = '\t'
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)
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FROM person
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WHERE zip_code > 94511;
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-- Schema-less mode
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SELECT TRANSFORM(zip_code, name, age)
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USING 'cat'
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FROM person
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WHERE zip_code > 94500;
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