Someone on IRC a while ago was complaining that there was no way to
specify an interval for pg_sleep, so I made one. Patch against today's
HEAD attached.
Usage: SELECT pg_sleep(interval '2 minutes');
I would add this to the next commitfest but I seem to be unable to log
in with my community account (I can log in to the wiki). Help appreciated.
*** a/doc/src/sgml/func.sgml
--- b/doc/src/sgml/func.sgml
***************
*** 7537,7550 **** SELECT TIMESTAMP 'now'; -- incorrect for use with DEFAULT
</indexterm>
<para>
! The following function is available to delay execution of the server
process:
<synopsis>
pg_sleep(<replaceable>seconds</replaceable>)
</synopsis>
<function>pg_sleep</function> makes the current session's process
! sleep until <replaceable>seconds</replaceable> seconds have
elapsed. <replaceable>seconds</replaceable> is a value of type
<type>double precision</>, so fractional-second delays can be specified.
For example:
--- 7537,7552 ----
</indexterm>
<para>
! The following functions are available to delay execution of the server
process:
<synopsis>
pg_sleep(<replaceable>seconds</replaceable>)
+ pg_sleep(<replaceable>interval</replaceable>)
</synopsis>
<function>pg_sleep</function> makes the current session's process
! sleep until <replaceable>seconds</replaceable> seconds (or the specified
! <replaceable>interval</replaceable>) have
elapsed. <replaceable>seconds</replaceable> is a value of type
<type>double precision</>, so fractional-second delays can be specified.
For example:
*** a/src/include/catalog/pg_proc.h
--- b/src/include/catalog/pg_proc.h
***************
*** 3017,3022 **** DATA(insert OID = 2625 ( pg_ls_dir PGNSP PGUID 12 1 1000 0 0 f f f f t t v 1 0
--- 3017,3024 ----
DESCR("list all files in a directory");
DATA(insert OID = 2626 ( pg_sleep PGNSP PGUID 12 1 0 0 0 f f f f t f v 1 0 2278 "701" _null_ _null_ _null_ _null_ pg_sleep _null_ _null_ _null_ ));
DESCR("sleep for the specified time in seconds");
+ DATA(insert OID = 3179 ( pg_sleep PGNSP PGUID 14 1 0 0 0 f f f f t f v 1 0 2278 "1186" _null_ _null_ _null_ _null_ "select pg_sleep(extract(epoch from now() + $1) - extract(epoch from now()))" _null_ _null_ _null_ ));
+ DESCR("sleep for the specified interval");
DATA(insert OID = 2971 ( text PGNSP PGUID 12 1 0 0 0 f f f f t f i 1 0 25 "16" _null_ _null_ _null_ _null_ booltext _null_ _null_ _null_ ));
DESCR("convert boolean to text");
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