org.apache.spark.sql.execution.datasources.jdbc

JdbcUtils

object JdbcUtils extends Logging

Util functions for JDBC tables.

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  8. def createConnectionFactory(options: JDBCOptions): () ⇒ Connection

    Returns a factory for creating connections to the given JDBC URL.

    Returns a factory for creating connections to the given JDBC URL.

    options

    - JDBC options that contains url, table and other information.

  9. def createTable(conn: Connection, df: DataFrame, options: JDBCOptions): Unit

    Creates a table with a given schema.

  10. def dropTable(conn: Connection, table: String): Unit

    Drops a table from the JDBC database.

  11. final def eq(arg0: AnyRef): Boolean

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  13. def finalize(): Unit

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  14. final def getClass(): Class[_]

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  15. def getCommonJDBCType(dt: DataType): Option[JdbcType]

    Retrieve standard jdbc types.

    Retrieve standard jdbc types.

    dt

    The datatype (e.g. org.apache.spark.sql.types.StringType)

    returns

    The default JdbcType for this DataType

  16. def getInsertStatement(table: String, rddSchema: StructType, tableSchema: Option[StructType], isCaseSensitive: Boolean, dialect: JdbcDialect): String

    Returns an Insert SQL statement for inserting a row into the target table via JDBC conn.

  17. def getSchema(resultSet: ResultSet, dialect: JdbcDialect): StructType

    Takes a ResultSet and returns its Catalyst schema.

    Takes a ResultSet and returns its Catalyst schema.

    returns

    A StructType giving the Catalyst schema.

    Exceptions thrown
    SQLException

    if the schema contains an unsupported type.

  18. def getSchemaOption(conn: Connection, options: JDBCOptions): Option[StructType]

    Returns the schema if the table already exists in the JDBC database.

  19. def hashCode(): Int

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  20. def initializeLogIfNecessary(isInterpreter: Boolean): Unit

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  21. def isCascadingTruncateTable(url: String): Option[Boolean]

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  23. def isTraceEnabled(): Boolean

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  24. def log: Logger

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  25. def logDebug(msg: ⇒ String, throwable: Throwable): Unit

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  28. def logError(msg: ⇒ String): Unit

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  29. def logInfo(msg: ⇒ String, throwable: Throwable): Unit

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  30. def logInfo(msg: ⇒ String): Unit

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  31. def logName: String

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  32. def logTrace(msg: ⇒ String, throwable: Throwable): Unit

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  33. def logTrace(msg: ⇒ String): Unit

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  34. def logWarning(msg: ⇒ String, throwable: Throwable): Unit

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  35. def logWarning(msg: ⇒ String): Unit

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  38. final def notifyAll(): Unit

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  39. def resultSetToRows(resultSet: ResultSet, schema: StructType): Iterator[Row]

    Convert a ResultSet into an iterator of Catalyst Rows.

  40. def savePartition(getConnection: () ⇒ Connection, table: String, iterator: Iterator[Row], rddSchema: StructType, insertStmt: String, batchSize: Int, dialect: JdbcDialect, isolationLevel: Int): Iterator[Byte]

    Saves a partition of a DataFrame to the JDBC database.

    Saves a partition of a DataFrame to the JDBC database. This is done in a single database transaction (unless isolation level is "NONE") in order to avoid repeatedly inserting data as much as possible.

    It is still theoretically possible for rows in a DataFrame to be inserted into the database more than once if a stage somehow fails after the commit occurs but before the stage can return successfully.

    This is not a closure inside saveTable() because apparently cosmetic implementation changes elsewhere might easily render such a closure non-Serializable. Instead, we explicitly close over all variables that are used.

  41. def saveTable(df: DataFrame, tableSchema: Option[StructType], isCaseSensitive: Boolean, options: JDBCOptions): Unit

    Saves the RDD to the database in a single transaction.

  42. def schemaString(df: DataFrame, url: String, createTableColumnTypes: Option[String] = None): String

    Compute the schema string for this RDD.

  43. final def synchronized[T0](arg0: ⇒ T0): T0

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  44. def tableExists(conn: Connection, options: JDBCOptions): Boolean

    Returns true if the table already exists in the JDBC database.

  45. def toString(): String

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  46. def truncateTable(conn: Connection, table: String): Unit

    Truncates a table from the JDBC database.

  47. final def wait(): Unit

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  48. final def wait(arg0: Long, arg1: Int): Unit

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