Package io.trino.plugin.deltalake.transactionlog

Class DeltaLakeSchemaSupport

java.lang.Object

io.trino.plugin.deltalake.transactionlog.DeltaLakeSchemaSupport

public final class DeltaLakeSchemaSupport
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	DeltaLakeSchemaSupport.ColumnMappingMode

Field Summary

Fields

Modifier and Type	Field	Description
static final String	APPEND_ONLY_CONFIGURATION_KEY
static final String	COLUMN_MAPPING_MODE_CONFIGURATION_KEY

Method Summary

Modifier and Type	Method	Description
static boolean	changeDataFeedEnabled(MetadataEntry metadataEntry)
static List<ColumnMetadata>	extractColumnMetadata(MetadataEntry metadataEntry, TypeManager typeManager)
static List<DeltaLakeColumnHandle>	extractPartitionColumns(MetadataEntry metadataEntry, TypeManager typeManager)
static List<DeltaLakeColumnHandle>	extractPartitionColumns(List<DeltaLakeColumnMetadata> schema, List<String> canonicalPartitionColumns)
static List<DeltaLakeColumnMetadata>	extractSchema(MetadataEntry metadataEntry, TypeManager typeManager)
static Map<String,String>	getCheckConstraints(MetadataEntry metadataEntry)
static Map<String,String>	getColumnComments(MetadataEntry metadataEntry)
static Map<String,String>	getColumnInvariants(MetadataEntry metadataEntry)
static DeltaLakeSchemaSupport.ColumnMappingMode	getColumnMappingMode(MetadataEntry metadata)
static <T> Map<String,T>	getColumnProperties(MetadataEntry metadataEntry, Function<com.fasterxml.jackson.databind.JsonNode,T> extractor)
static Map<String,Map<String,Object>>	getColumnsMetadata(MetadataEntry metadataEntry)
static Map<String,Boolean>	getColumnsNullability(MetadataEntry metadataEntry)
static Map<String,String>	getGeneratedColumnExpressions(MetadataEntry metadataEntry)
static boolean	isAppendOnly(MetadataEntry metadataEntry)
static String	serializeSchemaAsJson(List<DeltaLakeColumnHandle> columns, Map<String,String> columnComments, Map<String,Boolean> columnNullability, Map<String,Map<String,Object>> columnMetadata)
static String	serializeStatsAsJson(DeltaLakeFileStatistics fileStatistics)
static void	validateType(Type type)
static void	verifySupportedColumnMapping(DeltaLakeSchemaSupport.ColumnMappingMode mappingMode)

Methods inherited from class java.lang.Object

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

Field Details

APPEND_ONLY_CONFIGURATION_KEY

public static final String APPEND_ONLY_CONFIGURATION_KEY

See Also:

• Constant Field Values

COLUMN_MAPPING_MODE_CONFIGURATION_KEY

public static final String COLUMN_MAPPING_MODE_CONFIGURATION_KEY

See Also:

• Constant Field Values

Method Details

isAppendOnly

public static boolean isAppendOnly(MetadataEntry metadataEntry)

getColumnMappingMode

public static DeltaLakeSchemaSupport.ColumnMappingMode getColumnMappingMode(MetadataEntry metadata)

extractPartitionColumns

public static List<DeltaLakeColumnHandle> extractPartitionColumns(MetadataEntry metadataEntry,
 TypeManager typeManager)

extractPartitionColumns

public static List<DeltaLakeColumnHandle> extractPartitionColumns(List<DeltaLakeColumnMetadata> schema,
 List<String> canonicalPartitionColumns)

serializeSchemaAsJson

public static String serializeSchemaAsJson(List<DeltaLakeColumnHandle> columns,
 Map<String,String> columnComments,
 Map<String,Boolean> columnNullability,
 Map<String,Map<String,Object>> columnMetadata)

validateType

public static void validateType(Type type)

serializeStatsAsJson

public static String serializeStatsAsJson(DeltaLakeFileStatistics fileStatistics)
                                   throws com.fasterxml.jackson.core.JsonProcessingException

Throws:

com.fasterxml.jackson.core.JsonProcessingException

extractColumnMetadata

public static List<ColumnMetadata> extractColumnMetadata(MetadataEntry metadataEntry,
 TypeManager typeManager)

extractSchema

public static List<DeltaLakeColumnMetadata> extractSchema(MetadataEntry metadataEntry,
 TypeManager typeManager)

verifySupportedColumnMapping

public static void verifySupportedColumnMapping(DeltaLakeSchemaSupport.ColumnMappingMode mappingMode)

getColumnComments

public static Map<String,String> getColumnComments(MetadataEntry metadataEntry)

getColumnsNullability

public static Map<String,Boolean> getColumnsNullability(MetadataEntry metadataEntry)

getColumnInvariants

public static Map<String,String> getColumnInvariants(MetadataEntry metadataEntry)

getGeneratedColumnExpressions

public static Map<String,String> getGeneratedColumnExpressions(MetadataEntry metadataEntry)

getCheckConstraints

public static Map<String,String> getCheckConstraints(MetadataEntry metadataEntry)

changeDataFeedEnabled

public static boolean changeDataFeedEnabled(MetadataEntry metadataEntry)

getColumnsMetadata

public static Map<String,Map<String,Object>> getColumnsMetadata(MetadataEntry metadataEntry)

getColumnProperties

public static <T> Map<String,T> getColumnProperties(MetadataEntry metadataEntry,
 Function<com.fasterxml.jackson.databind.JsonNode,T> extractor)