- block_size (integer)
Reports the size of a disk block. It is determined by the value
of BLCKSZ when building the server. The default
value is 8192 bytes. The meaning of some configuration
variables (such as shared_buffers) is
influenced by block_size. See Section 18.4 for information.
- integer_datetimes (boolean)
Reports whether PostgreSQL was built
with support for 64-bit-integer dates and times. It is set by
configuring with --enable-integer-datetimes
when building PostgreSQL. The
default value is off.
- lc_collate (string)
Reports the locale in which sorting of textual data is done.
See Section 22.1 for more information.
The value is determined when the database cluster is initialized.
- lc_ctype (string)
Reports the locale that determines character classifications.
See Section 22.1 for more information.
The value is determined when the database cluster is initialized.
Ordinarily this will be the same as lc_collate,
but for special applications it might be set differently.
- max_function_args (integer)
Reports the maximum number of function arguments. It is determined by
the value of FUNC_MAX_ARGS when building the server. The
default value is 100 arguments.
- max_identifier_length (integer)
Reports the maximum identifier length. It is determined as one
less than the value of NAMEDATALEN when building
the server. The default value of NAMEDATALEN is
64; therefore the default
max_identifier_length is 63 bytes.
- max_index_keys (integer)
Reports the maximum number of index keys. It is determined by
the value of INDEX_MAX_KEYS when building the server. The
default value is 32 keys.
- server_encoding (string)
Reports the database encoding (character set).
It is determined when the database is created. Ordinarily,
clients need only be concerned with the value of client_encoding.
- server_version (string)
Reports the version number of the server. It is determined by the
value of PG_VERSION when building the server.
- server_version_num (integer)
Reports the version number of the server as an integer. It is determined
by the value of PG_VERSION_NUM when building the server.
