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[SPARK-10101] [SQL] Add maxlength to JDBC field metadata and override JDBCDialects for strings as VARCHAR. #8374

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[SPARK-10101] [SQL] Add maxlength to JDBC field metadata and override JDBCDialects for strings as VARCHAR. #8374

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c7abad3
Added stringDataType option to jdbc connection properties
rama-mullapudi Aug 22, 2015
f1d0b9e
Added maxlength for field metadata so string types can use for VARCHAR.
rama-mullapudi Aug 27, 2015
faff507
Added maxlength for field metadata so string types can use for VARCHAR.
rama-mullapudi Aug 27, 2015
c4b4477
Added maxlength for field metadata so string types can use for VARCHAR.
rama-mullapudi Aug 27, 2015
35e61f3
Added method override for getJDBCType to take 2 parameters DataType a…
rama-mullapudi Sep 14, 2015
dd22b2f
Sync to master
rama-mullapudi Sep 14, 2015
cd809c5
Sync Master
rama-mullapudi Sep 26, 2015
0cfeefa
Sync Master
rama-mullapudi Sep 26, 2015
dddc137
Updated a call with added parameter
rama-mullapudi Sep 26, 2015
5f532e8
Fixed spark code style where comment exceeded 100 chars, and changed …
rama-mullapudi Sep 28, 2015
03f4d96
Merge remote-tracking branch 'upstream/master'
rama-mullapudi Sep 28, 2015
27f118b
Fixed sync with master issue
rama-mullapudi Sep 28, 2015
44e1978
Fixed JDBCSuite for DB2 to send extra parameter for getJDBCType
rama-mullapudi Sep 28, 2015
e605a11
Fixed JDBCSuite for DB2 to send extra parameter for getJDBCType
rama-mullapudi Sep 28, 2015
4cae11b
Fixed JDBCSuite for DB2 to send extra parameter for getJDBCType
rama-mullapudi Sep 29, 2015
4c2a7a4
Updated JDBCDialects to save VARCHAR size to metadata
rama-mullapudi Sep 29, 2015
a0cb024
Updated JDBCDialects to save VARCHAR size to metadata
rama-mullapudi Sep 29, 2015
d50bdf7
Changed call for getJDBCType to call both methods with datatype and m…
rama-mullapudi Oct 4, 2015
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Added maxlength for field metadata so string types can use for VARCHAR. 
Changed  getJDBCType to take 2 parameters DataType and MetaData

Usage in Scala
import org.apache.spark.sql.types.MetadataBuilder
val metadata = new MetadataBuilder().putLong("maxlength", 10).build()
df.withColumn("colName", col("colName").as("colName", metadata)
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rama-mullapudi committed Aug 27, 2015
commit faff50776011aed42559c1ffe61923ebc5e57999
3 changes: 3 additions & 0 deletions sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
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Expand Up @@ -126,6 +126,9 @@ object JdbcDialects {

registerDialect(MySQLDialect)
registerDialect(PostgresDialect)
registerDialect(OracleDialect)
registerDialect(DB2Dialect)
registerDialect(NetezzaDialect)

/**
* Fetch the JdbcDialect class corresponding to a given database url.
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