Fix dblink_build_sql_insert() and related functions to handle dropped
columns correctly. In passing, get rid of some dead logic in the underlying get_sql_insert() etc functions --- there is no caller that will pass null value-arrays to them. Per bug report from Robert Voinea.
This commit is contained in:
Tom Lane
parent
4a96908575
commit
3b3706d2cf
|
|
@ -8,7 +8,7 @@
|
|||
* Darko Prenosil <Darko.Prenosil@finteh.hr>
|
||||
* Shridhar Daithankar <shridhar_daithankar@persistent.co.in>
|
||||
*
|
||||
* $PostgreSQL: pgsql/contrib/dblink/dblink.c,v 1.96 2010/06/15 16:22:19 tgl Exp $
|
||||
* $PostgreSQL: pgsql/contrib/dblink/dblink.c,v 1.97 2010/06/15 19:04:15 tgl Exp $
|
||||
* Copyright (c) 2001-2010, PostgreSQL Global Development Group
|
||||
* ALL RIGHTS RESERVED;
|
||||
*
|
||||
|
|
@ -1741,7 +1741,7 @@ get_sql_insert(Relation rel, int *pkattnums, int pknumatts, char **src_pkattvals
|
|||
appendStringInfo(&buf, ") VALUES(");
|
||||
|
||||
/*
|
||||
* remember attvals are 1 based
|
||||
* Note: i is physical column number (counting from 0).
|
||||
*/
|
||||
needComma = false;
|
||||
for (i = 0; i < natts; i++)
|
||||
|
|
@ -1752,12 +1752,9 @@ get_sql_insert(Relation rel, int *pkattnums, int pknumatts, char **src_pkattvals
|
|||
if (needComma)
|
||||
appendStringInfo(&buf, ",");
|
||||
|
||||
if (tgt_pkattvals != NULL)
|
||||
key = get_attnum_pk_pos(pkattnums, pknumatts, i);
|
||||
else
|
||||
key = -1;
|
||||
key = get_attnum_pk_pos(pkattnums, pknumatts, i);
|
||||
|
||||
if (key > -1)
|
||||
if (key >= 0)
|
||||
val = tgt_pkattvals[key] ? pstrdup(tgt_pkattvals[key]) : NULL;
|
||||
else
|
||||
val = SPI_getvalue(tuple, tupdesc, i + 1);
|
||||
|
|
@ -1802,10 +1799,6 @@ get_sql_delete(Relation rel, int *pkattnums, int pknumatts, char **tgt_pkattvals
|
|||
appendStringInfoString(&buf,
|
||||
quote_ident_cstr(NameStr(tupdesc->attrs[pkattnum]->attname)));
|
||||
|
||||
if (tgt_pkattvals == NULL)
|
||||
/* internal error */
|
||||
elog(ERROR, "target key array must not be NULL");
|
||||
|
||||
if (tgt_pkattvals[i] != NULL)
|
||||
appendStringInfo(&buf, " = %s",
|
||||
quote_literal_cstr(tgt_pkattvals[i]));
|
||||
|
|
@ -1845,6 +1838,9 @@ get_sql_update(Relation rel, int *pkattnums, int pknumatts, char **src_pkattvals
|
|||
|
||||
appendStringInfo(&buf, "UPDATE %s SET ", relname);
|
||||
|
||||
/*
|
||||
* Note: i is physical column number (counting from 0).
|
||||
*/
|
||||
needComma = false;
|
||||
for (i = 0; i < natts; i++)
|
||||
{
|
||||
|
|
@ -1857,12 +1853,9 @@ get_sql_update(Relation rel, int *pkattnums, int pknumatts, char **src_pkattvals
|
|||
appendStringInfo(&buf, "%s = ",
|
||||
quote_ident_cstr(NameStr(tupdesc->attrs[i]->attname)));
|
||||
|
||||
if (tgt_pkattvals != NULL)
|
||||
key = get_attnum_pk_pos(pkattnums, pknumatts, i);
|
||||
else
|
||||
key = -1;
|
||||
key = get_attnum_pk_pos(pkattnums, pknumatts, i);
|
||||
|
||||
if (key > -1)
|
||||
if (key >= 0)
|
||||
val = tgt_pkattvals[key] ? pstrdup(tgt_pkattvals[key]) : NULL;
|
||||
else
|
||||
val = SPI_getvalue(tuple, tupdesc, i + 1);
|
||||
|
|
@ -1889,16 +1882,10 @@ get_sql_update(Relation rel, int *pkattnums, int pknumatts, char **src_pkattvals
|
|||
appendStringInfo(&buf, "%s",
|
||||
quote_ident_cstr(NameStr(tupdesc->attrs[pkattnum]->attname)));
|
||||
|
||||
if (tgt_pkattvals != NULL)
|
||||
val = tgt_pkattvals[i] ? pstrdup(tgt_pkattvals[i]) : NULL;
|
||||
else
|
||||
val = SPI_getvalue(tuple, tupdesc, pkattnum + 1);
|
||||
val = tgt_pkattvals[i];
|
||||
|
||||
if (val != NULL)
|
||||
{
|
||||
appendStringInfo(&buf, " = %s", quote_literal_cstr(val));
|
||||
pfree(val);
|
||||
}
|
||||
else
|
||||
appendStringInfo(&buf, " IS NULL");
|
||||
}
|
||||
|
|
@ -1964,18 +1951,12 @@ get_tuple_of_interest(Relation rel, int *pkattnums, int pknumatts, char **src_pk
|
|||
{
|
||||
char *relname;
|
||||
TupleDesc tupdesc;
|
||||
int natts;
|
||||
StringInfoData buf;
|
||||
int ret;
|
||||
HeapTuple tuple;
|
||||
int i;
|
||||
|
||||
initStringInfo(&buf);
|
||||
|
||||
/* get relation name including any needed schema prefix and quoting */
|
||||
relname = generate_relation_name(rel);
|
||||
|
||||
tupdesc = rel->rd_att;
|
||||
|
||||
/*
|
||||
* Connect to SPI manager
|
||||
*/
|
||||
|
|
@ -1983,11 +1964,36 @@ get_tuple_of_interest(Relation rel, int *pkattnums, int pknumatts, char **src_pk
|
|||
/* internal error */
|
||||
elog(ERROR, "SPI connect failure - returned %d", ret);
|
||||
|
||||
initStringInfo(&buf);
|
||||
|
||||
/* get relation name including any needed schema prefix and quoting */
|
||||
relname = generate_relation_name(rel);
|
||||
|
||||
tupdesc = rel->rd_att;
|
||||
natts = tupdesc->natts;
|
||||
|
||||
/*
|
||||
* Build sql statement to look up tuple of interest Use src_pkattvals as
|
||||
* the criteria.
|
||||
* Build sql statement to look up tuple of interest, ie, the one matching
|
||||
* src_pkattvals. We used to use "SELECT *" here, but it's simpler to
|
||||
* generate a result tuple that matches the table's physical structure,
|
||||
* with NULLs for any dropped columns. Otherwise we have to deal with
|
||||
* two different tupdescs and everything's very confusing.
|
||||
*/
|
||||
appendStringInfo(&buf, "SELECT * FROM %s WHERE ", relname);
|
||||
appendStringInfoString(&buf, "SELECT ");
|
||||
|
||||
for (i = 0; i < natts; i++)
|
||||
{
|
||||
if (i > 0)
|
||||
appendStringInfoString(&buf, ", ");
|
||||
|
||||
if (tupdesc->attrs[i]->attisdropped)
|
||||
appendStringInfoString(&buf, "NULL");
|
||||
else
|
||||
appendStringInfoString(&buf,
|
||||
quote_ident_cstr(NameStr(tupdesc->attrs[i]->attname)));
|
||||
}
|
||||
|
||||
appendStringInfo(&buf, " FROM %s WHERE ", relname);
|
||||
|
||||
for (i = 0; i < pknumatts; i++)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -887,3 +887,40 @@ SELECT dblink_disconnect();
|
|||
OK
|
||||
(1 row)
|
||||
|
||||
-- test dropped columns in dblink_build_sql_insert, dblink_build_sql_update
|
||||
CREATE TEMP TABLE test_dropped
|
||||
(
|
||||
col1 INT NOT NULL DEFAULT 111,
|
||||
id SERIAL PRIMARY KEY,
|
||||
col2 INT NOT NULL DEFAULT 112,
|
||||
col2b INT NOT NULL DEFAULT 113
|
||||
);
|
||||
NOTICE: CREATE TABLE will create implicit sequence "test_dropped_id_seq" for serial column "test_dropped.id"
|
||||
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "test_dropped_pkey" for table "test_dropped"
|
||||
INSERT INTO test_dropped VALUES(default);
|
||||
ALTER TABLE test_dropped
|
||||
DROP COLUMN col1,
|
||||
DROP COLUMN col2,
|
||||
ADD COLUMN col3 VARCHAR(10) NOT NULL DEFAULT 'foo',
|
||||
ADD COLUMN col4 INT NOT NULL DEFAULT 42;
|
||||
SELECT dblink_build_sql_insert('test_dropped', '2', 1,
|
||||
ARRAY['1'::TEXT], ARRAY['2'::TEXT]);
|
||||
dblink_build_sql_insert
|
||||
---------------------------------------------------------------------------
|
||||
INSERT INTO test_dropped(id,col2b,col3,col4) VALUES('2','113','foo','42')
|
||||
(1 row)
|
||||
|
||||
SELECT dblink_build_sql_update('test_dropped', '2', 1,
|
||||
ARRAY['1'::TEXT], ARRAY['2'::TEXT]);
|
||||
dblink_build_sql_update
|
||||
-------------------------------------------------------------------------------------------
|
||||
UPDATE test_dropped SET id = '2', col2b = '113', col3 = 'foo', col4 = '42' WHERE id = '2'
|
||||
(1 row)
|
||||
|
||||
SELECT dblink_build_sql_delete('test_dropped', '2', 1,
|
||||
ARRAY['2'::TEXT]);
|
||||
dblink_build_sql_delete
|
||||
-----------------------------------------
|
||||
DELETE FROM test_dropped WHERE id = '2'
|
||||
(1 row)
|
||||
|
||||
|
|
|
|||
|
|
@ -412,3 +412,29 @@ SELECT notify_name, be_pid = (select t.be_pid from dblink('select pg_backend_pid
|
|||
SELECT * from dblink_get_notify();
|
||||
|
||||
SELECT dblink_disconnect();
|
||||
|
||||
-- test dropped columns in dblink_build_sql_insert, dblink_build_sql_update
|
||||
CREATE TEMP TABLE test_dropped
|
||||
(
|
||||
col1 INT NOT NULL DEFAULT 111,
|
||||
id SERIAL PRIMARY KEY,
|
||||
col2 INT NOT NULL DEFAULT 112,
|
||||
col2b INT NOT NULL DEFAULT 113
|
||||
);
|
||||
|
||||
INSERT INTO test_dropped VALUES(default);
|
||||
|
||||
ALTER TABLE test_dropped
|
||||
DROP COLUMN col1,
|
||||
DROP COLUMN col2,
|
||||
ADD COLUMN col3 VARCHAR(10) NOT NULL DEFAULT 'foo',
|
||||
ADD COLUMN col4 INT NOT NULL DEFAULT 42;
|
||||
|
||||
SELECT dblink_build_sql_insert('test_dropped', '2', 1,
|
||||
ARRAY['1'::TEXT], ARRAY['2'::TEXT]);
|
||||
|
||||
SELECT dblink_build_sql_update('test_dropped', '2', 1,
|
||||
ARRAY['1'::TEXT], ARRAY['2'::TEXT]);
|
||||
|
||||
SELECT dblink_build_sql_delete('test_dropped', '2', 1,
|
||||
ARRAY['2'::TEXT]);
|
||||
|
|
|
|||
Loading…
Reference in New Issue