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This patch implements FOR EACH STATEMENT triggers, per my email to

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-hackers a couple days ago.

Notes/caveats:

        - added regression tests for the new functionality, all
          regression tests pass on my machine

        - added pg_dump support

        - updated PL/PgSQL to support per-statement triggers; didn't
          look at the other procedural languages.

        - there's (even) more code duplication in trigger.c than there
          was previously. Any suggestions on how to refactor the
          ExecXXXTriggers() functions to reuse more code would be
          welcome -- I took a brief look at it, but couldn't see an
          easy way to do it (there are several subtly-different
          versions of the code in question)

        - updated the documentation. I also took the liberty of
          removing a big chunk of duplicated syntax documentation in
          the Programmer's Guide on triggers, and moving that
          information to the CREATE TRIGGER reference page.

        - I also included some spelling fixes and similar small
          cleanups I noticed while making the changes. If you'd like
          me to split those into a separate patch, let me know.

Neil Conway
This commit is contained in:
Bruce Momjian
2002-11-23 03:59:09 +00:00
parent ea29b32758
commit 1b7f3cc02d
24 changed files with 702 additions and 411 deletions
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12
src/backend/utils/adt/pg_lzcompress.c
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@@ -1,7 +1,7 @@
/* ----------
* pg_lzcompress.c -
*
* $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_lzcompress.c,v 1.15 2002/09/04 20:31:28 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_lzcompress.c,v 1.16 2002/11/23 03:59:08 momjian Exp $
*
* This is an implementation of LZ compression for PostgreSQL.
* It uses a simple history table and generates 2-3 byte tags
@@ -87,7 +87,7 @@
* OOOO LLLL OOOO OOOO
*
* This limits the offset to 1-4095 (12 bits) and the length
* to 3-18 (4 bits) because 3 is allways added to it. To emit
* to 3-18 (4 bits) because 3 is always added to it. To emit
* a tag of 2 bytes with a length of 2 only saves one control
* bit. But we lose one byte in the possible length of a tag.
*
@@ -230,7 +230,7 @@ static PGLZ_Strategy strategy_default_data = {
PGLZ_Strategy *PGLZ_strategy_default = &strategy_default_data;
static PGLZ_Strategy strategy_allways_data = {
static PGLZ_Strategy strategy_always_data = {
0, /* Chunks of any size are compressed */
0, /* */
0, /* We want to save at least one single
@@ -239,7 +239,7 @@ static PGLZ_Strategy strategy_allways_data = {
* bytes is found */
6 /* Look harder for a good match. */
};
PGLZ_Strategy *PGLZ_strategy_allways = &strategy_allways_data;
PGLZ_Strategy *PGLZ_strategy_always = &strategy_always_data;
static PGLZ_Strategy strategy_never_data = {
@@ -247,7 +247,7 @@ static PGLZ_Strategy strategy_never_data = {
0, /* */
0, /* */
0, /* Zero indicates "store uncompressed
* allways" */
* always" */
0 /* */
};
PGLZ_Strategy *PGLZ_strategy_never = &strategy_never_data;
@@ -716,7 +716,7 @@ pglz_decompress(PGLZ_Header *source, char *dest)
/*
* Now we copy the bytes specified by the tag from OUTPUT
* to OUTPUT. It is dangerous and platform dependant to
* to OUTPUT. It is dangerous and platform dependent to
* use memcpy() here, because the copied areas could
* overlap extremely!
*/