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Be more wary in initdb's creation of platform-dependent collations.

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Discard any collation aliases that match the built-in pg_collation entries
(ie, "default", "C", "POSIX").  Such aliases would be refused by a CREATE
COLLATION command, but since initdb is injecting them via a simple INSERT,
it has to make the corresponding check for itself.  Per Martin Pitt's
report of funny behavior in a machine that had a bogus "C.UTF-8" locale.

Also, use E'' syntax for the output of escape_quotes, as per its header
comment.
This commit is contained in:
Tom Lane 2011-05-10 12:08:47 -04:00
parent 5059cf6ebf
commit 853c1750f9
1 changed files with 16 additions and 9 deletions
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25
src/bin/initdb/initdb.c
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@ -1595,6 +1595,7 @@ setup_collation(void)
size_t len;
int enc;
bool skip;
char *quoted_locale;
char alias[NAMEDATALEN];
len = strlen(localebuf);
@ -1645,8 +1646,10 @@ setup_collation(void)
count++;
PG_CMD_PRINTF2("INSERT INTO tmp_pg_collation (locale, encoding) VALUES ('%s', %d);\n",
escape_quotes(localebuf), enc);
quoted_locale = escape_quotes(localebuf);
PG_CMD_PRINTF3("INSERT INTO tmp_pg_collation VALUES (E'%s', E'%s', %d);\n",
quoted_locale, quoted_locale, enc);
/*
* Generate aliases such as "en_US" in addition to "en_US.utf8" for
@ -1654,29 +1657,33 @@ setup_collation(void)
* only, so this doesn't clash with "en_US" for LATIN1, say.
*/
if (normalize_locale_name(alias, localebuf))
PG_CMD_PRINTF3("INSERT INTO tmp_pg_collation (collname, locale, encoding) VALUES ('%s', '%s', %d);\n",
escape_quotes(alias), escape_quotes(localebuf), enc);
PG_CMD_PRINTF3("INSERT INTO tmp_pg_collation VALUES (E'%s', E'%s', %d);\n",
escape_quotes(alias), quoted_locale, enc);
}
/* Add an SQL-standard name */
PG_CMD_PRINTF1("INSERT INTO tmp_pg_collation (collname, locale, encoding) VALUES ('ucs_basic', 'C', %d);\n", PG_UTF8);
PG_CMD_PRINTF1("INSERT INTO tmp_pg_collation VALUES ('ucs_basic', 'C', %d);\n", PG_UTF8);
/*
* When copying collations to the final location, eliminate aliases that
* conflict with an existing locale name for the same encoding. For
* example, "br_FR.iso88591" is normalized to "br_FR", both for encoding
* LATIN1. But the unnormalized locale "br_FR" already exists for LATIN1.
* Prefer the collation that matches the OS locale name, else the first
* Prefer the alias that matches the OS locale name, else the first locale
* name by sort order (arbitrary choice to be deterministic).
*
* Also, eliminate any aliases that conflict with pg_collation's
* hard-wired entries for "C" etc.
*/
PG_CMD_PUTS("INSERT INTO pg_collation (collname, collnamespace, collowner, collencoding, collcollate, collctype) "
" SELECT DISTINCT ON (final_collname, collnamespace, encoding)"
" COALESCE(collname, locale) AS final_collname, "
" SELECT DISTINCT ON (collname, encoding)"
" collname, "
" (SELECT oid FROM pg_namespace WHERE nspname = 'pg_catalog') AS collnamespace, "
" (SELECT relowner FROM pg_class WHERE relname = 'pg_collation') AS collowner, "
" encoding, locale, locale "
" FROM tmp_pg_collation"
" ORDER BY final_collname, collnamespace, encoding, (collname = locale) DESC, locale;\n");
" WHERE NOT EXISTS (SELECT 1 FROM pg_collation WHERE collname = tmp_pg_collation.collname)"
" ORDER BY collname, encoding, (collname = locale) DESC, locale;\n");
pclose(locale_a_handle);
PG_CMD_CLOSE;