CREATE TABLE

Function

CREATE TABLE is specific to DataArts Fabric SQL. It is used to create a table with a specified name on LakeFormation.

Precautions

• Columns appearing in PARTITIONED BY must not be described among the regular columns of the table. Partition columns are always positioned after the regular columns.
• The CLUSTERED BY syntax is applicable only to ORC and Parquet tables, and not to Hudi and Iceberg tables.
• ctid and xc_node_id cannot be used as column names.

Syntax

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CREATE [ EXTERNAL ] TABLE [ IF NOT EXISTS ] [schema_name.]table_name 
[ ( col_name col_type [ COMMENT col_comment ] [, ... ] ) ]
[ COMMENT table_comment ]
[ PARTITION BY ( col_name col_type COMMENT col_comment [, ... ] ) ]
[ CLUSTERED BY (col_name [,...]) INTO ( bucket_num ) BUCKETS ]
[ TABLEPROPERTIES ( option_key = option_value [, ... ] ) ]
[ STORE AS table_format ]
[ LOCATION table_path ]
AS select_stmt;

Parameter Description

• EXTERNAL

  Specifying this keyword creates an EXTERNAL table. Omitting it defaults to creating a MANAGED table, where files, metadata, and statistical information are all managed by DataArts Fabric SQL.

• IF NOT EXISTS

  Issues a notice rather than throwing an error if a table with the same name already exists.

• schema_name

  The name of the database to which the table belongs. If no database name is specified, the table is created within the current_schema.

• table_name

  The name of the table to be created, which should not exceed 63 characters in length.

• col_name

  The name of the column to be created in the table, also limited to 63 characters. The combined total of regular and partition columns must not exceed 5,000.

• col_type

  The data type of the column to be created, with supported ranges as follows:

  Column Type	Can Be Declared As Partition Column	Supports ORC Format	Supports Parquet Format	Supports Iceberg Format
  SmallInt	√	√	√	√
  Int	√	√	√	√
  BigInt	√	√	√	√
  Float	×	√	√	√
  Double	×	√	√	√
  Decimal	√	√	√	√
  Numeric	√	√	√	√
  Timestamp	√	√	√	√
  Date	√	√	√	√
  Varchar	√	√	√	√
  Char	√	√	√	√
  Bool	×	√	√	√
  Bytea	×	√	√	√
  Text	√	√	√	√

• col_comment

  Comment for the column, which can be any string.

• table_comment

  Comment for the table, which can also be any string.

• bucket_num

  Number of buckets.

• option_key = option_value

  Setting parameters at the table level, with supported parameter ranges as follows:

  Table 1 Value range of the option_key parameter

  option_key	option_value	Description	Applicable Scope
  orc.compress	zlib, snappy, lz4	Compression method for ORC files.	ORC
  parquet.compression	zlib, snappy, lz4	Compression method for Parquet files.	PARQUET
  julian_adjust	true, false	Whether to convert to Julian date.	PARQUET
  checkencoding	high, low, no	Whether to check character encoding.	ORC, PARQUET
  column_index_access	true, false	Matching method between table-defined columns and file columns during reading. Defaults to true for column index matching, false for column name matching.	ORC, PARQUET
  filesize	Certificates ranging from 1 to 1,024 bits	Size of external table files generated.	ORC, PARQUET
  write.delete.mode	copy-on-write, merge-on-read	Mode setting for deletion: cow or mor.	Iceberg
  write.update.mode	copy-on-write, merge-on-read	Mode setting for updates: cow or mor.
  write.merge.mode	copy-on-write, merge-on-read	Mode setting for merges: cow or mor.
  write.parquet.compression-codec	zstd, lz4, snappy, gzip,uncompressed	Compression method for Parquet files.
  write.merge.isolation-level	snapshot, serializable	Isolation level for merge commands.
  write.metadata.delete-after-commit.enabled	true, false	Controls whether the oldest tracked version metadata file is deleted after committing.
  write.update.isolation-level	snapshot, serializable	Isolation level for update commands.
  write.delete.isolation-level	snapshot, serializable	Isolation level for delete commands.
  write.metadata.previous-versions-max	An integer greater than 0	Number of older metadata files to retain.
  write.parquet.bloom-filter-enabled.column.col1	true, false	Whether to write the col1 column to the bloom filter index.

  • table_format

    Table storage formats, supporting ORC, PARQUET, and ICEBERG.

  • table_path

    Table storage path. The value must be a valid OBS path. OBS buckets and parallel file systems are supported. If the path is an OBS bucket path, the table is read-only. Otherwise, the table can be read and written. If the table to be created is a managed table, the table storage path cannot be specified. The table storage path is specified by the system as the path with the same name as the table name in the schema path, and the path must be empty during table creation.

  • select_stmt

    Query statement. External tables do not support CTAS statements.

Examples

Create an ORC table.

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CREATE TABLE test_table1 (a int, b bool, c text) store as orc;