This has been deprecated and effectively unused for a long time.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
<entry><structfield>conbin</structfield></entry>
<entry><type>pg_node_tree</type></entry>
<entry></entry>
- <entry>If a check constraint, an internal representation of the expression</entry>
- </row>
-
- <row>
- <entry><structfield>consrc</structfield></entry>
- <entry><type>text</type></entry>
- <entry></entry>
- <entry>If a check constraint, a human-readable representation of the expression</entry>
+ <entry>If a check constraint, an internal representation of the
+ expression. (It's recommended to use
+ <function>pg_get_constraintdef()</function> to extract the definition of
+ a check constraint.)</entry>
</row>
</tbody>
</tgroup>
index.)
</para>
- <note>
- <para>
- <structfield>consrc</structfield> is not updated when referenced objects
- change; for example, it won't track renaming of columns. Rather than
- relying on this field, it's best to use <function>pg_get_constraintdef()</function>
- to extract the definition of a check constraint.
- </para>
- </note>
-
<note>
<para>
<literal>pg_class.relchecks</literal> needs to agree with the
bool is_no_inherit, bool is_internal)
{
char *ccbin;
- char *ccsrc;
List *varList;
int keycount;
int16 *attNos;
*/
ccbin = nodeToString(expr);
- /*
- * Also deparse it to form the mostly-obsolete consrc field.
- */
- ccsrc = deparse_expression(expr,
- deparse_context_for(RelationGetRelationName(rel),
- RelationGetRelid(rel)),
- false, false);
-
/*
* Find columns of rel that are used in expr
*
NULL, /* not an exclusion constraint */
expr, /* Tree form of check constraint */
ccbin, /* Binary form of check constraint */
- ccsrc, /* Source form of check constraint */
is_local, /* conislocal */
inhcount, /* coninhcount */
is_no_inherit, /* connoinherit */
is_internal); /* internally constructed? */
pfree(ccbin);
- pfree(ccsrc);
return constrOid;
}
indexInfo->ii_ExclusionOps,
NULL, /* no check constraint */
NULL,
- NULL,
islocal,
inhcount,
noinherit,
const Oid *exclOp,
Node *conExpr,
const char *conBin,
- const char *conSrc,
bool conIsLocal,
int conInhCount,
bool conNoInherit,
else
nulls[Anum_pg_constraint_conexclop - 1] = true;
- /*
- * initialize the binary form of the check constraint.
- */
if (conBin)
values[Anum_pg_constraint_conbin - 1] = CStringGetTextDatum(conBin);
else
nulls[Anum_pg_constraint_conbin - 1] = true;
- /*
- * initialize the text form of the check constraint
- */
- if (conSrc)
- values[Anum_pg_constraint_consrc - 1] = CStringGetTextDatum(conSrc);
- else
- nulls[Anum_pg_constraint_consrc - 1] = true;
-
tup = heap_form_tuple(RelationGetDescr(conDesc), values, nulls);
conOid = CatalogTupleInsert(conDesc, tup);
NULL,
NULL,
NULL,
- NULL,
false,
1, false, true);
subclone = lappend_oid(subclone, constrOid);
NULL, /* no exclusion constraint */
NULL, /* no check constraint */
NULL,
- NULL,
true, /* islocal */
0, /* inhcount */
true, /* isnoinherit */
NULL, /* no exclusion */
NULL, /* no check constraint */
NULL,
- NULL,
true, /* islocal */
0, /* inhcount */
true, /* isnoinherit */
const char *domainName, ObjectAddress *constrAddr)
{
Node *expr;
- char *ccsrc;
char *ccbin;
ParseState *pstate;
CoerceToDomainValue *domVal;
*/
ccbin = nodeToString(expr);
- /*
- * Deparse it to produce text for consrc.
- */
- ccsrc = deparse_expression(expr,
- NIL, false, false);
-
/*
* Store the constraint in pg_constraint
*/
NULL, /* not an exclusion constraint */
expr, /* Tree form of check constraint */
ccbin, /* Binary form of check constraint */
- ccsrc, /* Source form of check constraint */
true, /* is local */
0, /* inhcount */
false, /* connoinherit */
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 201811011
+#define CATALOG_VERSION_NO 201811012
#endif
* If a check constraint, nodeToString representation of expression
*/
pg_node_tree conbin;
-
- /*
- * If a check constraint, source-text representation of expression
- */
- text consrc;
#endif
} FormData_pg_constraint;
const Oid *exclOp,
Node *conExpr,
const char *conBin,
- const char *conSrc,
bool conIsLocal,
int conInhCount,
bool conNoInherit,
CREATE TABLE ac (aa TEXT);
alter table ac add constraint ac_check check (aa is not null);
CREATE TABLE bc (bb TEXT) INHERITS (ac);
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+----------+---------+------------+-------------+------------------
ac | ac_check | c | t | 0 | (aa IS NOT NULL)
alter table bc drop constraint ac_check; -- fail, disallowed
ERROR: cannot drop inherited constraint "ac_check" of relation "bc"
alter table ac drop constraint ac_check;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+---------+---------+------------+-------------+--------
(0 rows)
-- try the unnamed-constraint case
alter table ac add check (aa is not null);
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+-------------+---------+------------+-------------+------------------
ac | ac_aa_check | c | t | 0 | (aa IS NOT NULL)
alter table bc drop constraint ac_aa_check; -- fail, disallowed
ERROR: cannot drop inherited constraint "ac_aa_check" of relation "bc"
alter table ac drop constraint ac_aa_check;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+---------+---------+------------+-------------+--------
(0 rows)
alter table ac add constraint ac_check check (aa is not null);
alter table bc no inherit ac;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+----------+---------+------------+-------------+------------------
ac | ac_check | c | t | 0 | (aa IS NOT NULL)
(2 rows)
alter table bc drop constraint ac_check;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+----------+---------+------------+-------------+------------------
ac | ac_check | c | t | 0 | (aa IS NOT NULL)
(1 row)
alter table ac drop constraint ac_check;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+---------+---------+------------+-------------+--------
(0 rows)
create table bc (a int constraint check_a check (a <> 0), b int constraint check_b check (b <> 0)) inherits (ac);
NOTICE: merging column "a" with inherited definition
NOTICE: merging constraint "check_a" with inherited definition
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+---------+---------+------------+-------------+----------
ac | check_a | c | t | 0 | (a <> 0)
create table ac (a int constraint check_a check (a <> 0));
create table bc (b int constraint check_b check (b <> 0));
create table cc (c int constraint check_c check (c <> 0)) inherits (ac, bc);
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+---------+---------+------------+-------------+----------
ac | check_a | c | t | 0 | (a <> 0)
(5 rows)
alter table cc no inherit bc;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
relname | conname | contype | conislocal | coninhcount | consrc
---------+---------+---------+------------+-------------+----------
ac | check_a | c | t | 0 | (a <> 0)
CREATE TABLE ac (aa TEXT);
alter table ac add constraint ac_check check (aa is not null);
CREATE TABLE bc (bb TEXT) INHERITS (ac);
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
insert into ac (aa) values (NULL);
insert into bc (aa) values (NULL);
alter table bc drop constraint ac_check; -- fail, disallowed
alter table ac drop constraint ac_check;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
-- try the unnamed-constraint case
alter table ac add check (aa is not null);
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
insert into ac (aa) values (NULL);
insert into bc (aa) values (NULL);
alter table bc drop constraint ac_aa_check; -- fail, disallowed
alter table ac drop constraint ac_aa_check;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
alter table ac add constraint ac_check check (aa is not null);
alter table bc no inherit ac;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
alter table bc drop constraint ac_check;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
alter table ac drop constraint ac_check;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
drop table bc;
drop table ac;
create table ac (a int constraint check_a check (a <> 0));
create table bc (a int constraint check_a check (a <> 0), b int constraint check_b check (b <> 0)) inherits (ac);
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
drop table bc;
drop table ac;
create table ac (a int constraint check_a check (a <> 0));
create table bc (b int constraint check_b check (b <> 0));
create table cc (c int constraint check_c check (c <> 0)) inherits (ac, bc);
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
alter table cc no inherit bc;
-select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
+select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pg_get_expr(pgc.conbin, pc.oid) as consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
drop table cc;
drop table bc;
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