The CSV storage engine does not support
indexing.
Partitioning is not supported for tables using the
CSV storage engine. Beginning with MySQL
5.1.12, it is no longer possible to create partitioned
CSV tables. (See Bug#19307)
Beginning with MySQL 5.1.23, tables using the
CSV storage engine can no longer be created
with NULL columns. However, for backward
compatibility, you can continue to use such tables that were
created in previous MySQL releases. (Bug#32050)

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