information_schema.parameters.character_octet_length

Note:

Same as the CHARACTER_MAXIMUM_LENGTH except for multi-byte character sets.

Note:

Always null, since this information is not applied to parameter data types in PostgreSQL

Note:

Always null, since this information is not applied to parameter data types in PostgreSQL

Note:

Always NULL.

Note:

Maximum length, in bytes, for binary or character data types. -1 for xml and large-value type data. Otherwise, returns NULL.