hiveInsert Statement


Syntax

  • Standard syntax:

  • INSERT OVERWRITE TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...) [IF NOT EXISTS]] select_statement1 FROM from_statement;

  • INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] select_statement1 FROM from_statement;

  • INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] (z,y) select_statement1 FROM from_statement;

  • Hive extension (multiple inserts):

  • FROM from_statement
    INSERT OVERWRITE TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...) [IF NOT EXISTS]] select_statement1
    [INSERT OVERWRITE TABLE tablename2 [PARTITION ... [IF NOT EXISTS]] select_statement2]
    [INSERT INTO TABLE tablename2 [PARTITION ...] select_statement2] ...;

  • FROM from_statement
    INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] select_statement1
    [INSERT INTO TABLE tablename2 [PARTITION ...] select_statement2]
    [INSERT OVERWRITE TABLE tablename2 [PARTITION ... [IF NOT EXISTS]] select_statement2] ...;

  • Hive extension (dynamic partition inserts):

  • INSERT OVERWRITE TABLE tablename PARTITION (partcol1[=val1], partcol2[=val2] ...) select_statement FROM from_statement;

  • INSERT INTO TABLE tablename PARTITION (partcol1[=val1], partcol2[=val2] ...) select_statement FROM from_statement;

Remarks

insert overwrite
An insert overwrite statement deletes any existing files in the target table or partition before adding new files based off of the select statement used. Note that when there are structure changes to a table or to the DML used to load the table that sometimes the old files are not deleted. When loading to a table using dynamic partitioning only partitions defined by the select statement will be overwritten. Any preexisting partitions in the target will remain and will not be deleted.

insert into
An insert into statement appends new data into a target table based off of the select statement used.