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Diffstat (limited to 'doc/FAQ_DEV')
| -rw-r--r-- | doc/FAQ_DEV | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/doc/FAQ_DEV b/doc/FAQ_DEV index 6a6f1d51d5e..65d478471a4 100644 --- a/doc/FAQ_DEV +++ b/doc/FAQ_DEV @@ -1,7 +1,7 @@ Developer's Frequently Asked Questions (FAQ) for PostgreSQL - Last updated: Mon Jun 2 00:34:39 EDT 2003 + Last updated: Wed Oct 29 21:40:18 EST 2003 Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) @@ -34,7 +34,7 @@ 2.3) Why do we use Node and List to make data structures? 2.4) I just added a field to a structure. What else should I do? 2.5) Why do we use palloc() and pfree() to allocate memory? - 2.6) What is elog()? + 2.6) What is ereport()? 2.7) What is CommandCounterIncrement()? _________________________________________________________________ @@ -687,20 +687,21 @@ List *i, *list; are special non-query contexts that memory can be allocated in. These affect when the allocated memory is freed by the backend. - 2.6) What is elog()? + 2.6) What is ereport()? - elog() is used to send messages to the front-end, and optionally + ereport() is used to send messages to the front-end, and optionally terminate the current query being processed. The first parameter is an - elog level of DEBUG (levels 1-5), LOG, INFO, NOTICE, ERROR, FATAL, or - PANIC. NOTICE prints on the user's terminal and the postmaster logs. - INFO prints only to the user's terminal and LOG prints only to the - server logs. (These can be changed from postgresql.conf.) ERROR prints - in both places, and terminates the current query, never returning from - the call. FATAL terminates the backend process. The remaining - parameters of elog are a printf-style set of parameters to print. - - elog(ERROR) frees most memory and open file descriptors so you don't - need to clean these up before the call. + ereport level of DEBUG (levels 1-5), LOG, INFO, NOTICE, ERROR, FATAL, + or PANIC. NOTICE prints on the user's terminal and the postmaster + logs. INFO prints only to the user's terminal and LOG prints only to + the server logs. (These can be changed from postgresql.conf.) ERROR + prints in both places, and terminates the current query, never + returning from the call. FATAL terminates the backend process. The + remaining parameters of ereport are a printf-style set of parameters + to print. + + ereport(ERROR) frees most memory and open file descriptors so you + don't need to clean these up before the call. 2.7) What is CommandCounterIncrement()? |