org.apache.iceberg.hive

Class HiveSchemaUtil

java.lang.Object

org.apache.iceberg.hive.HiveSchemaUtil

public final class HiveSchemaUtil
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static org.apache.iceberg.Schema	convert(java.util.List<org.apache.hadoop.hive.metastore.api.FieldSchema> fieldSchemas) Converts a Hive schema (list of FieldSchema objects) to an Iceberg schema.
static org.apache.iceberg.Schema	convert(java.util.List<org.apache.hadoop.hive.metastore.api.FieldSchema> fieldSchemas, boolean autoConvert) Converts a Hive schema (list of FieldSchema objects) to an Iceberg schema.
static org.apache.iceberg.Schema	convert(java.util.List<java.lang.String> names, java.util.List<org.apache.hadoop.hive.serde2.typeinfo.TypeInfo> types, java.util.List<java.lang.String> comments) Converts the Hive list of column names and column types to an Iceberg schema.
static org.apache.iceberg.Schema	convert(java.util.List<java.lang.String> names, java.util.List<org.apache.hadoop.hive.serde2.typeinfo.TypeInfo> types, java.util.List<java.lang.String> comments, boolean autoConvert) Converts the Hive list of column names and column types to an Iceberg schema.
static java.util.List<org.apache.hadoop.hive.metastore.api.FieldSchema>	convert(org.apache.iceberg.Schema schema) Converts the Iceberg schema to a Hive schema (list of FieldSchema objects).
static org.apache.hadoop.hive.serde2.typeinfo.TypeInfo	convert(org.apache.iceberg.types.Type type) Converts an Iceberg type to a Hive TypeInfo object.
static org.apache.iceberg.types.Type	convert(org.apache.hadoop.hive.serde2.typeinfo.TypeInfo typeInfo) Converts a Hive typeInfo object to an Iceberg type.
static org.apache.iceberg.PartitionSpec	spec(org.apache.iceberg.Schema schema, java.util.List<org.apache.hadoop.hive.metastore.api.FieldSchema> fieldSchemas) Converts the Hive partition columns to Iceberg identity partition specification.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

convert

public static java.util.List<org.apache.hadoop.hive.metastore.api.FieldSchema> convert(org.apache.iceberg.Schema schema)

Converts the Iceberg schema to a Hive schema (list of FieldSchema objects).

Parameters:

schema - The original Iceberg schema to convert

Returns:

The Hive column list generated from the Iceberg schema

convert

public static org.apache.iceberg.Schema convert(java.util.List<org.apache.hadoop.hive.metastore.api.FieldSchema> fieldSchemas)

Converts a Hive schema (list of FieldSchema objects) to an Iceberg schema. If some of the types are not convertible then exception is thrown.

Parameters:

fieldSchemas - The list of the columns

Returns:

An equivalent Iceberg Schema

convert

public static org.apache.iceberg.Schema convert(java.util.List<org.apache.hadoop.hive.metastore.api.FieldSchema> fieldSchemas,
                                                boolean autoConvert)

Converts a Hive schema (list of FieldSchema objects) to an Iceberg schema.

Parameters:

fieldSchemas - The list of the columns

autoConvert - If true then TINYINT and SMALLINT is converted to INTEGER and VARCHAR and CHAR is converted to STRING. Otherwise if these types are used in the Hive schema then exception is thrown.

Returns:

An equivalent Iceberg Schema

spec

public static org.apache.iceberg.PartitionSpec spec(org.apache.iceberg.Schema schema,
                                                    java.util.List<org.apache.hadoop.hive.metastore.api.FieldSchema> fieldSchemas)

Converts the Hive partition columns to Iceberg identity partition specification.

Parameters:

schema - The Iceberg schema

fieldSchemas - The partition column specification

Returns:

The Iceberg partition specification

convert

public static org.apache.iceberg.Schema convert(java.util.List<java.lang.String> names,
                                                java.util.List<org.apache.hadoop.hive.serde2.typeinfo.TypeInfo> types,
                                                java.util.List<java.lang.String> comments)

Converts the Hive list of column names and column types to an Iceberg schema. If some of the types are not convertible then exception is thrown.

Parameters:

names - The list of the Hive column names

types - The list of the Hive column types

comments - The list of the Hive column comments

Returns:

The Iceberg schema

convert

public static org.apache.iceberg.Schema convert(java.util.List<java.lang.String> names,
                                                java.util.List<org.apache.hadoop.hive.serde2.typeinfo.TypeInfo> types,
                                                java.util.List<java.lang.String> comments,
                                                boolean autoConvert)

Converts the Hive list of column names and column types to an Iceberg schema.

Parameters:

names - The list of the Hive column names

types - The list of the Hive column types

comments - The list of the Hive column comments, can be null

autoConvert - If true then TINYINT and SMALLINT is converted to INTEGER and VARCHAR and CHAR is converted to STRING. Otherwise if these types are used in the Hive schema then exception is thrown.

Returns:

The Iceberg schema

convert

public static org.apache.hadoop.hive.serde2.typeinfo.TypeInfo convert(org.apache.iceberg.types.Type type)

Converts an Iceberg type to a Hive TypeInfo object.

Parameters:

type - The Iceberg type

Returns:

The Hive type

convert

public static org.apache.iceberg.types.Type convert(org.apache.hadoop.hive.serde2.typeinfo.TypeInfo typeInfo)

Converts a Hive typeInfo object to an Iceberg type.

Parameters:

typeInfo - The Hive type

Returns:

The Iceberg type