dlt.common.normalizers.json.relational

DataItemNormalizer Objects

class DataItemNormalizer(DataItemNormalizerBase[RelationalNormalizerConfig])

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C_DLT_ROOT_ID

unique id of top level parent

C_DLT_PARENT_ID

unique id of parent row

C_DLT_LIST_IDX

position in the list of rows

C_VALUE

for lists of simple types

EMPTY_KEY_IDENTIFIER

replace empty keys with this

__init__

def __init__(schema: Schema) -> None

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This item normalizer works with nested dictionaries. It flattens dictionaries and descends into lists. It yields row dictionaries at each nesting level.

extend_schema

def extend_schema(extend_tables: bool = True) -> None

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Extends Schema with normalizer-specific hints and settings.

This method is called by Schema when instance is created or restored from storage.

extend_table

def extend_table(table_name: str) -> None

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If the table has a merge write disposition, add propagation info to normalizer

Called by Schema when new table is added to schema or table is updated with partial table. Table name should be normalized.

remove_table

def remove_table(table_name: str) -> None

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Called by the Schema when table is removed from it.