database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-09-02 04:21:28 +03:00
Code Activity

Support deferrable uniqueness constraints.

Browse Source 
The current implementation fires an AFTER ROW trigger for each tuple that
looks like it might be non-unique according to the index contents at the
time of insertion.  This works well as long as there aren't many conflicts,
but won't scale to massive unique-key reassignments.  Improving that case
is a TODO item.

Dean Rasheed
This commit is contained in:
Tom Lane
2009-07-29 20:56:21 +00:00
parent 8504905793
commit 25d9bf2e3e
51 changed files with 1241 additions and 245 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/bin/pg_dump/pg_dump.c
View File

@@ -12,7 +12,7 @@
* by PostgreSQL
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.c,v 1.542 2009/07/23 22:59:40 tgl Exp $
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.c,v 1.543 2009/07/29 20:56:19 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -3655,6 +3655,8 @@ getIndexes(TableInfo tblinfo[], int numTables)
i_indisclustered,
i_contype,
i_conname,
i_condeferrable,
i_condeferred,
i_contableoid,
i_conoid,
i_tablespace,
@@ -3696,6 +3698,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"t.relnatts AS indnkeys, "
"i.indkey, i.indisclustered, "
"c.contype, c.conname, "
"c.condeferrable, c.condeferred, "
"c.tableoid AS contableoid, "
"c.oid AS conoid, "
"(SELECT spcname FROM pg_catalog.pg_tablespace s WHERE s.oid = t.reltablespace) AS tablespace, "
@@ -3722,6 +3725,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"t.relnatts AS indnkeys, "
"i.indkey, i.indisclustered, "
"c.contype, c.conname, "
"c.condeferrable, c.condeferred, "
"c.tableoid AS contableoid, "
"c.oid AS conoid, "
"(SELECT spcname FROM pg_catalog.pg_tablespace s WHERE s.oid = t.reltablespace) AS tablespace, "
@@ -3748,6 +3752,7 @@ getIndexes(TableInfo tblinfo[], int numTables)
"t.relnatts AS indnkeys, "
"i.indkey, i.indisclustered, "
"c.contype, c.conname, "
"c.condeferrable, c.condeferred, "
"c.tableoid AS contableoid, "
"c.oid AS conoid, "
"NULL AS tablespace, "
@@ -3776,6 +3781,8 @@ getIndexes(TableInfo tblinfo[], int numTables)
"CASE WHEN i.indisprimary THEN 'p'::char "
"ELSE '0'::char END AS contype, "
"t.relname AS conname, "
"false AS condeferrable, "
"false AS condeferred, "
"0::oid AS contableoid, "
"t.oid AS conoid, "
"NULL AS tablespace, "
@@ -3799,6 +3806,8 @@ getIndexes(TableInfo tblinfo[], int numTables)
"CASE WHEN i.indisprimary THEN 'p'::char "
"ELSE '0'::char END AS contype, "
"t.relname AS conname, "
"false AS condeferrable, "
"false AS condeferred, "
"0::oid AS contableoid, "
"t.oid AS conoid, "
"NULL AS tablespace, "
@@ -3824,6 +3833,8 @@ getIndexes(TableInfo tblinfo[], int numTables)
i_indisclustered = PQfnumber(res, "indisclustered");
i_contype = PQfnumber(res, "contype");
i_conname = PQfnumber(res, "conname");
i_condeferrable = PQfnumber(res, "condeferrable");
i_condeferred = PQfnumber(res, "condeferred");
i_contableoid = PQfnumber(res, "contableoid");
i_conoid = PQfnumber(res, "conoid");
i_tablespace = PQfnumber(res, "tablespace");
@@ -3884,6 +3895,8 @@ getIndexes(TableInfo tblinfo[], int numTables)
constrinfo[j].condef = NULL;
constrinfo[j].confrelid = InvalidOid;
constrinfo[j].conindex = indxinfo[j].dobj.dumpId;
constrinfo[j].condeferrable = *(PQgetvalue(res, j, i_condeferrable)) == 't';
constrinfo[j].condeferred = *(PQgetvalue(res, j, i_condeferred)) == 't';
constrinfo[j].conislocal = true;
constrinfo[j].separate = true;
@@ -3988,6 +4001,8 @@ getConstraints(TableInfo tblinfo[], int numTables)
constrinfo[j].condef = strdup(PQgetvalue(res, j, i_condef));
constrinfo[j].confrelid = atooid(PQgetvalue(res, j, i_confrelid));
constrinfo[j].conindex = 0;
constrinfo[j].condeferrable = false;
constrinfo[j].condeferred = false;
constrinfo[j].conislocal = true;
constrinfo[j].separate = true;
}
@@ -4072,6 +4087,8 @@ getDomainConstraints(TypeInfo *tinfo)
constrinfo[i].condef = strdup(PQgetvalue(res, i, i_consrc));
constrinfo[i].confrelid = InvalidOid;
constrinfo[i].conindex = 0;
constrinfo[i].condeferrable = false;
constrinfo[i].condeferred = false;
constrinfo[i].conislocal = true;
constrinfo[i].separate = false;
@@ -5071,6 +5088,8 @@ getTableAttrs(TableInfo *tblinfo, int numTables)
constrs[j].condef = strdup(PQgetvalue(res, j, 3));
constrs[j].confrelid = InvalidOid;
constrs[j].conindex = 0;
constrs[j].condeferrable = false;
constrs[j].condeferred = false;
constrs[j].conislocal = (PQgetvalue(res, j, 4)[0] == 't');
constrs[j].separate = false;
@@ -10454,6 +10473,13 @@ dumpConstraint(Archive *fout, ConstraintInfo *coninfo)
if (indxinfo->options && strlen(indxinfo->options) > 0)
appendPQExpBuffer(q, " WITH (%s)", indxinfo->options);
if (coninfo->condeferrable)
{
appendPQExpBuffer(q, " DEFERRABLE");
if (coninfo->condeferred)
appendPQExpBuffer(q, " INITIALLY DEFERRED");
}
appendPQExpBuffer(q, ";\n");
/* If the index is clustered, we need to record that. */