:: DeveloperApi :: The primary workflow for executing relational queries using Spark.
Apply a schema defined by the schema to an RDD.
Apply a schema defined by the schema to an RDD. It is only used by PySpark.
Apply a schema defined by the schemaString to an RDD.
Apply a schema defined by the schemaString to an RDD. It is only used by PySpark.
Convert a BaseRelation created for external data sources into a DataFrame.
Convert a BaseRelation created for external data sources into a DataFrame.
Caches the specified table in-memory.
Caches the specified table in-memory.
Removes all cached tables from the in-memory cache.
Removes all cached tables from the in-memory cache.
Fewer partitions to speed up testing.
Fewer partitions to speed up testing.
Applies a schema to an RDD of Java Beans.
Applies a schema to an RDD of Java Beans.
WARNING: Since there is no guaranteed ordering for fields in a Java Bean, SELECT * queries will return the columns in an undefined order.
Applies a schema to an RDD of Java Beans.
Applies a schema to an RDD of Java Beans.
WARNING: Since there is no guaranteed ordering for fields in a Java Bean, SELECT * queries will return the columns in an undefined order.
Creates a DataFrame from an JavaRDD containing Rows by applying a seq of names of columns to this RDD, the data type for each column will be inferred by the first row.
Creates a DataFrame from an JavaRDD containing Rows by applying a seq of names of columns to this RDD, the data type for each column will be inferred by the first row.
an JavaRDD of Row
names for each column
DataFrame
:: DeveloperApi :: Creates a DataFrame from an JavaRDD containing Rows using the given schema.
:: DeveloperApi :: Creates a DataFrame from an JavaRDD containing Rows using the given schema. It is important to make sure that the structure of every Row of the provided RDD matches the provided schema. Otherwise, there will be runtime exception.
:: DeveloperApi :: Creates a DataFrame from an RDD containing Rows using the given schema.
:: DeveloperApi :: Creates a DataFrame from an RDD containing Rows using the given schema. It is important to make sure that the structure of every Row of the provided RDD matches the provided schema. Otherwise, there will be runtime exception. Example:
import org.apache.spark.sql._ import org.apache.spark.sql.types._ val sqlContext = new org.apache.spark.sql.SQLContext(sc) val schema = StructType( StructField("name", StringType, false) :: StructField("age", IntegerType, true) :: Nil) val people = sc.textFile("examples/src/main/resources/people.txt").map( _.split(",")).map(p => Row(p(0), p(1).trim.toInt)) val dataFrame = sqlContext.createDataFrame(people, schema) dataFrame.printSchema // root // |-- name: string (nullable = false) // |-- age: integer (nullable = true) dataFrame.registerTempTable("people") sqlContext.sql("select name from people").collect.foreach(println)
:: Experimental :: Creates a DataFrame from a local Seq of Product.
:: Experimental :: Creates a DataFrame from a local Seq of Product.
:: Experimental :: Creates a DataFrame from an RDD of case classes.
:: Experimental :: Creates a DataFrame from an RDD of case classes.
:: Experimental :: (Scala-specific) Create an external table from the given path based on a data source, a schema and a set of options.
:: Experimental :: (Scala-specific) Create an external table from the given path based on a data source, a schema and a set of options. Then, returns the corresponding DataFrame.
:: Experimental :: Create an external table from the given path based on a data source, a schema and a set of options.
:: Experimental :: Create an external table from the given path based on a data source, a schema and a set of options. Then, returns the corresponding DataFrame.
:: Experimental :: (Scala-specific) Creates an external table from the given path based on a data source and a set of options.
:: Experimental :: (Scala-specific) Creates an external table from the given path based on a data source and a set of options. Then, returns the corresponding DataFrame.
:: Experimental :: Creates an external table from the given path based on a data source and a set of options.
:: Experimental :: Creates an external table from the given path based on a data source and a set of options. Then, returns the corresponding DataFrame.
:: Experimental :: Creates an external table from the given path based on a data source and returns the corresponding DataFrame.
:: Experimental :: Creates an external table from the given path based on a data source and returns the corresponding DataFrame.
:: Experimental :: Creates an external table from the given path and returns the corresponding DataFrame.
:: Experimental :: Creates an external table from the given path and returns the corresponding DataFrame. It will use the default data source configured by spark.sql.sources.default.
Drops the temporary table with the given table name in the catalog.
Drops the temporary table with the given table name in the catalog. If the table has been cached/persisted before, it's also unpersisted.
the name of the table to be unregistered.
:: Experimental :: Returns a DataFrame with no rows or columns.
:: Experimental :: Returns a DataFrame with no rows or columns.
:: Experimental :: A collection of methods that are considered experimental, but can be used to hook into the query planner for advanced functionality.
:: Experimental :: A collection of methods that are considered experimental, but can be used to hook into the query planner for advanced functionality.
Return all the configuration properties that have been set (i.
Return all the configuration properties that have been set (i.e. not the default). This creates a new copy of the config properties in the form of a Map.
Return the value of Spark SQL configuration property for the given key.
Return the value of Spark SQL configuration property for the given key. If the key is not set
yet, return defaultValue
.
Return the value of Spark SQL configuration property for the given key.
Return the value of Spark SQL configuration property for the given key.
Returns a Catalyst Schema for the given java bean class.
Returns a Catalyst Schema for the given java bean class.
:: Experimental :: (Scala-specific) Implicit methods available in Scala for converting common Scala objects into DataFrames.
Returns true if the table is currently cached in-memory.
Returns true if the table is currently cached in-memory.
:: Experimental :: Construct a DataFrame representing the database table accessible via JDBC URL url named table.
:: Experimental :: Construct a DataFrame representing the database table accessible via JDBC URL url named table. The theParts parameter gives a list expressions suitable for inclusion in WHERE clauses; each one defines one partition of the DataFrame.
:: Experimental :: Construct a DataFrame representing the database table accessible via JDBC URL url named table.
:: Experimental :: Construct a DataFrame representing the database table accessible via JDBC URL url named table. Partitions of the table will be retrieved in parallel based on the parameters passed to this function.
the name of a column of integral type that will be used for partitioning.
the minimum value of columnName
to retrieve
the maximum value of columnName
to retrieve
the number of partitions. the range minValue
-maxValue
will be split
evenly into this many partitions
:: Experimental :: Construct a DataFrame representing the database table accessible via JDBC URL url named table.
:: Experimental :: Construct a DataFrame representing the database table accessible via JDBC URL url named table.
:: Experimental ::
:: Experimental ::
:: Experimental :: Loads a JSON file (one object per line) and applies the given schema, returning the result as a DataFrame.
:: Experimental :: Loads a JSON file (one object per line) and applies the given schema, returning the result as a DataFrame.
Loads a JSON file (one object per line), returning the result as a DataFrame.
Loads a JSON file (one object per line), returning the result as a DataFrame. It goes through the entire dataset once to determine the schema.
:: Experimental :: Loads a JavaRDD[String] storing JSON objects (one object per record) inferring the schema, returning the result as a DataFrame.
:: Experimental :: Loads a JavaRDD[String] storing JSON objects (one object per record) inferring the schema, returning the result as a DataFrame.
:: Experimental :: Loads an RDD[String] storing JSON objects (one object per record) inferring the schema, returning the result as a DataFrame.
:: Experimental :: Loads an RDD[String] storing JSON objects (one object per record) inferring the schema, returning the result as a DataFrame.
:: Experimental :: Loads an JavaRDD<String> storing JSON objects (one object per record) and applies the given schema, returning the result as a DataFrame.
:: Experimental :: Loads an JavaRDD<String> storing JSON objects (one object per record) and applies the given schema, returning the result as a DataFrame.
:: Experimental :: Loads an RDD[String] storing JSON objects (one object per record) and applies the given schema, returning the result as a DataFrame.
:: Experimental :: Loads an RDD[String] storing JSON objects (one object per record) and applies the given schema, returning the result as a DataFrame.
Loads an RDD[String] storing JSON objects (one object per record), returning the result as a DataFrame.
Loads an RDD[String] storing JSON objects (one object per record), returning the result as a DataFrame. It goes through the entire dataset once to determine the schema.
Loads an RDD[String] storing JSON objects (one object per record), returning the result as a DataFrame.
Loads an RDD[String] storing JSON objects (one object per record), returning the result as a DataFrame. It goes through the entire dataset once to determine the schema.
:: Experimental :: (Scala-specific) Returns the dataset specified by the given data source and a set of options as a DataFrame, using the given schema as the schema of the DataFrame.
:: Experimental :: (Scala-specific) Returns the dataset specified by the given data source and a set of options as a DataFrame, using the given schema as the schema of the DataFrame.
:: Experimental :: (Java-specific) Returns the dataset specified by the given data source and a set of options as a DataFrame, using the given schema as the schema of the DataFrame.
:: Experimental :: (Java-specific) Returns the dataset specified by the given data source and a set of options as a DataFrame, using the given schema as the schema of the DataFrame.
:: Experimental :: (Scala-specific) Returns the dataset specified by the given data source and a set of options as a DataFrame.
:: Experimental :: (Scala-specific) Returns the dataset specified by the given data source and a set of options as a DataFrame.
:: Experimental :: (Java-specific) Returns the dataset specified by the given data source and a set of options as a DataFrame.
:: Experimental :: (Java-specific) Returns the dataset specified by the given data source and a set of options as a DataFrame.
:: Experimental :: Returns the dataset stored at path as a DataFrame, using the given data source.
:: Experimental :: Returns the dataset stored at path as a DataFrame, using the given data source.
:: Experimental :: Returns the dataset stored at path as a DataFrame, using the default data source configured by spark.
:: Experimental :: Returns the dataset stored at path as a DataFrame, using the default data source configured by spark.sql.sources.default.
Turn a logical plan into a DataFrame.
Turn a logical plan into a DataFrame. This should be removed once we have an easier way to construct DataFrame directly out of local data without relying on implicits.
Loads a Parquet file, returning the result as a DataFrame.
Loads a Parquet file, returning the result as a DataFrame. This function returns an empty DataFrame if no paths are passed in.
Parses the data type in our internal string representation.
Parses the data type in our internal string representation. The data type string should
have the same format as the one generated by toString
in scala.
It is only used by PySpark.
Prepares a planned SparkPlan for execution by inserting shuffle operations as needed.
Prepares a planned SparkPlan for execution by inserting shuffle operations as needed.
Set the given Spark SQL configuration property.
Set the given Spark SQL configuration property.
Set Spark SQL configuration properties.
Set Spark SQL configuration properties.
Executes a SQL query using Spark, returning the result as a DataFrame.
Executes a SQL query using Spark, returning the result as a DataFrame. The dialect that is used for SQL parsing can be configured with 'spark.sql.dialect'.
Returns the specified table as a DataFrame.
Returns the specified table as a DataFrame.
Returns the names of tables in the given database as an array.
Returns the names of tables in the given database as an array.
Returns the names of tables in the current database as an array.
Returns the names of tables in the current database as an array.
Returns a DataFrame containing names of existing tables in the given database.
Returns a DataFrame containing names of existing tables in the given database. The returned DataFrame has two columns, tableName and isTemporary (a Boolean indicating if a table is a temporary one or not).
Returns a DataFrame containing names of existing tables in the current database.
Returns a DataFrame containing names of existing tables in the current database. The returned DataFrame has two columns, tableName and isTemporary (a Boolean indicating if a table is a temporary one or not).
A collection of methods for registering user-defined functions (UDF).
A collection of methods for registering user-defined functions (UDF).
The following example registers a Scala closure as UDF:
sqlContext.udf.register("myUdf", (arg1: Int, arg2: String) => arg2 + arg1)
The following example registers a UDF in Java:
sqlContext.udf().register("myUDF", new UDF2<Integer, String, String>() { @Override public String call(Integer arg1, String arg2) { return arg2 + arg1; } }, DataTypes.StringType);
Or, to use Java 8 lambda syntax:
sqlContext.udf().register("myUDF", (Integer arg1, String arg2) -> arg2 + arg1), DataTypes.StringType);
Removes the specified table from the in-memory cache.
Removes the specified table from the in-memory cache.
Applies a schema to an RDD of Java Beans.
Applies a schema to an RDD of Java Beans.
WARNING: Since there is no guaranteed ordering for fields in a Java Bean, SELECT * queries will return the columns in an undefined order.
(Since version 1.3.0) use createDataFrame
Applies a schema to an RDD of Java Beans.
Applies a schema to an RDD of Java Beans.
WARNING: Since there is no guaranteed ordering for fields in a Java Bean, SELECT * queries will return the columns in an undefined order.
(Since version 1.3.0) use createDataFrame
(Since version 1.3.0) use createDataFrame
:: DeveloperApi :: Creates a DataFrame from an RDD containing Rows by applying a schema to this RDD.
:: DeveloperApi :: Creates a DataFrame from an RDD containing Rows by applying a schema to this RDD. It is important to make sure that the structure of every Row of the provided RDD matches the provided schema. Otherwise, there will be runtime exception. Example:
import org.apache.spark.sql._ import org.apache.spark.sql.types._ val sqlContext = new org.apache.spark.sql.SQLContext(sc) val schema = StructType( StructField("name", StringType, false) :: StructField("age", IntegerType, true) :: Nil) val people = sc.textFile("examples/src/main/resources/people.txt").map( _.split(",")).map(p => Row(p(0), p(1).trim.toInt)) val dataFrame = sqlContext. applySchema(people, schema) dataFrame.printSchema // root // |-- name: string (nullable = false) // |-- age: integer (nullable = true) dataFrame.registerTempTable("people") sqlContext.sql("select name from people").collect.foreach(println)
(Since version 1.3.0) use createDataFrame
A SQLContext that can be used for local testing.