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[doc] Add more examples of insert overwrite partition #5366

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Merged
JingsongLi merged 1 commit into from
Mar 28, 2025
Merged

[doc] Add more examples of insert overwrite partition #5366

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15 changes: 15 additions & 0 deletions docs/content/spark/sql-write.md
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,8 @@ INSERT INTO my_table VALUES (1, 'p1'), (2, 'p2');

-- Static overwrite (Overwrite the whole table)
INSERT OVERWRITE my_table VALUES (3, 'p1');
-- or
INSERT OVERWRITE my_table PARTITION (pt) VALUES (3, 'p1');

SELECT * FROM my_table;
/*
Expand All @@ -95,6 +97,19 @@ SELECT * FROM my_table;
+---+---+
*/

-- Static overwrite with specified partitions (Only overwrite pt='p1')
INSERT OVERWRITE my_table PARTITION (pt='p1') VALUES (3);

SELECT * FROM my_table;
/*
+---+---+
| id| pt|
+---+---+
| 2| p2|
| 3| p1|
+---+---+
*/

-- Dynamic overwrite (Only overwrite pt='p1')
SET spark.sql.sources.partitionOverwriteMode=dynamic;
INSERT OVERWRITE my_table VALUES (3, 'p1');
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33 changes: 33 additions & 0 deletions ...on-spark-ut/src/test/scala/org/apache/paimon/spark/sql/InsertOverwriteTableTestBase.scala
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Expand Up @@ -575,4 +575,37 @@ abstract class InsertOverwriteTableTestBase extends PaimonSparkTestBase {
}
}
}

test("Paimon Insert: dynamic insert overwrite partition") {
withTable("my_table") {
sql("CREATE TABLE my_table (id INT, pt STRING) PARTITIONED BY (pt)")

for (mode <- Seq("static", "dynamic")) {
withSparkSQLConf("spark.sql.sources.partitionOverwriteMode" -> mode) {
sql("INSERT OVERWRITE my_table VALUES (1, 'p1'), (2, 'p2')")
// INSERT OVERWRITE table
sql("INSERT OVERWRITE my_table VALUES (3, 'p1')")
if (mode == "dynamic") {
checkAnswer(sql("SELECT * FROM my_table ORDER BY id"), Seq(Row(2, "p2"), Row(3, "p1")))
} else {
checkAnswer(sql("SELECT * FROM my_table ORDER BY id"), Row(3, "p1"))
}

sql("INSERT OVERWRITE my_table VALUES (1, 'p1'), (2, 'p2')")
// INSERT OVERWRITE table PARTITION (pt)
sql("INSERT OVERWRITE my_table PARTITION (pt) VALUES (3, 'p1')")
if (mode == "dynamic") {
checkAnswer(sql("SELECT * FROM my_table ORDER BY id"), Seq(Row(2, "p2"), Row(3, "p1")))
} else {
checkAnswer(sql("SELECT * FROM my_table ORDER BY id"), Row(3, "p1"))
}

sql("INSERT OVERWRITE my_table VALUES (1, 'p1'), (2, 'p2')")
// INSERT OVERWRITE table PARTITION (pt='p1')
sql("INSERT OVERWRITE my_table PARTITION (pt='p1') VALUES (3)")
checkAnswer(sql("SELECT * FROM my_table ORDER BY id"), Seq(Row(2, "p2"), Row(3, "p1")))
}
}
}
}
}
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