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Fix pg_dump to handle collations applied to columns of composite types.

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CREATE TYPE and ALTER TYPE ADD ATTRIBUTE handle this, so I suppose it's
an intended feature, but pg_dump didn't know about it.
This commit is contained in:
Tom Lane 2011-04-17 16:55:04 -04:00
parent 49a642ab18
commit acfa1f45ed
1 changed files with 57 additions and 11 deletions
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58
src/bin/pg_dump/pg_dump.c
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@ -7944,6 +7944,7 @@ dumpCompositeType(Archive *fout, TypeInfo *tyinfo)
int ntups;
int i_attname;
int i_atttypdefn;
int i_attcollation;
int i_typrelid;
int i;
@ -7951,17 +7952,42 @@ dumpCompositeType(Archive *fout, TypeInfo *tyinfo)
selectSourceSchema(tyinfo->dobj.namespace->dobj.name);
/* Fetch type specific details */
/* We assume here that remoteVersion must be at least 70300 */
if (fout->remoteVersion >= 90100)
{
/*
* attcollation is new in 9.1. Since we only want to dump COLLATE
* clauses for attributes whose collation is different from their
* type's default, we use a CASE here to suppress uninteresting
* attcollations cheaply.
*/
appendPQExpBuffer(query, "SELECT a.attname, "
"pg_catalog.format_type(a.atttypid, a.atttypmod) AS atttypdefn, "
"typrelid "
"FROM pg_catalog.pg_type t, pg_catalog.pg_attribute a "
"WHERE t.oid = '%u'::pg_catalog.oid "
"AND a.attrelid = t.typrelid "
"CASE WHEN a.attcollation <> at.typcollation "
"THEN a.attcollation ELSE 0 END AS attcollation, "
"ct.typrelid "
"FROM pg_catalog.pg_type ct, pg_catalog.pg_attribute a, "
"pg_catalog.pg_type at "
"WHERE ct.oid = '%u'::pg_catalog.oid "
"AND a.attrelid = ct.typrelid "
"AND a.atttypid = at.oid "
"AND NOT a.attisdropped "
"ORDER BY a.attnum ",
tyinfo->dobj.catId.oid);
}
else
{
/* We assume here that remoteVersion must be at least 70300 */
appendPQExpBuffer(query, "SELECT a.attname, "
"pg_catalog.format_type(a.atttypid, a.atttypmod) AS atttypdefn, "
"0 AS attcollation, "
"ct.typrelid "
"FROM pg_catalog.pg_type ct, pg_catalog.pg_attribute a "
"WHERE ct.oid = '%u'::pg_catalog.oid "
"AND a.attrelid = ct.typrelid "
"AND NOT a.attisdropped "
"ORDER BY a.attnum ",
tyinfo->dobj.catId.oid);
}
res = PQexec(g_conn, query->data);
check_sql_result(res, g_conn, query->data, PGRES_TUPLES_OK);
@ -7970,6 +7996,7 @@ dumpCompositeType(Archive *fout, TypeInfo *tyinfo)
i_attname = PQfnumber(res, "attname");
i_atttypdefn = PQfnumber(res, "atttypdefn");
i_attcollation = PQfnumber(res, "attcollation");
i_typrelid = PQfnumber(res, "typrelid");
if (binary_upgrade)
@ -7987,11 +8014,30 @@ dumpCompositeType(Archive *fout, TypeInfo *tyinfo)
{
char *attname;
char *atttypdefn;
Oid attcollation;
attname = PQgetvalue(res, i, i_attname);
atttypdefn = PQgetvalue(res, i, i_atttypdefn);
attcollation = atooid(PQgetvalue(res, i, i_attcollation));
appendPQExpBuffer(q, "\n\t%s %s", fmtId(attname), atttypdefn);
/* Add collation if not default for the column type */
if (OidIsValid(attcollation))
{
CollInfo *coll;
coll = findCollationByOid(attcollation);
if (coll)
{
/* always schema-qualify, don't try to be smart */
appendPQExpBuffer(q, " COLLATE %s.",
fmtId(coll->dobj.namespace->dobj.name));
appendPQExpBuffer(q, "%s",
fmtId(coll->dobj.name));
}
}
if (i < ntups - 1)
appendPQExpBuffer(q, ",");
}