![]() The VALUE column structures each row as an object with elements identified by column position (i.e.įor example, add a VARCHAR column named mycol that references the first column in the staged CSV files: VALUE column and/or the METADATA$FILENAME pseudocolumn: VALUEĪ VARIANT type column that represents a single row in the external file. Add virtual columns as expressions using the When queried, the column returns results derived from this expression.Įxternal table columns are virtual columns, which are defined using an explicit expression. String that specifies the expression for the column. The data type must match the result of expr for the column.įor details about the data types that can be specified for table columns, see Data Types. String (constant) that specifies the data type for the column. All the requirements for table identifiers also apply to column identifiers.įor more details, see Identifier Requirements. String that specifies the column identifier (i.e. String (constant) that specifies the file format: FILE_FORMAT = ( TYPE = CSV | JSON | AVRO | ORC | PARQUET ) To point an external table to individual staged files, use the PATTERN parameter.įILE_FORMAT = ( FORMAT_NAME = ' file_format_name ' ) or. Note that the LOCATION value cannot reference specific filenames. Path a and the external table location includes path b, then the external table reads files staged in ![]() To view the stage definition,Įxecute DESC STAGE stage_name and check the url property value. The external table appends this path to any path specified in the stage definition. Paths are alternatively called prefixes or folders by different cloud storage services. files have names that begin with a common string) that limits the set of files to load. Path is an optional case-sensitive path for files in the cloud storage location (i.e. Optional if a database and schema are currently in use within the user session otherwise, it is required. Namespace is the database and/or schema in which the external stage resides, in the form of database_name. Partitions computed from expressions CREATE EXTERNAL TABLE ( ) cloudProviderParams ) ] LOCATION = externalStage ROW ACCESS POLICY ON ( VALUE ) ] TAG ( = ' ' ) ] CREATE SECURITY INTEGRATION (Snowflake OAuth).CREATE SECURITY INTEGRATION (External OAuth).External Table Created with Detected Column Definitions.External Table that References Files in a Delta Lake.Partitions Added Automatically From Partition Column Expressions. ![]()
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