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Add support for altering CHECK constraint enforceability
This commit adds support for ALTER TABLE ALTER CONSTRAINT ... [NOT] ENFORCED for CHECK constraints. Previously, only foreign key constraints could have their enforceability altered. When changing from NOT ENFORCED to ENFORCED, the operation not only updates catalog information but also performs a full table scan in Phase 3 to validate that existing data satisfies the constraint. For partitioned tables and inheritance hierarchies, the operation recurses to all child tables. When changing to NOT ENFORCED, we must recurse even if the parent is already NOT ENFORCED, since child constraints may still be ENFORCED. Author: Jian He <jian.universality@gmail.com> Reviewed-by: Robert Treat <rob@xzilla.net> Reviewed-by: Kirill Reshke <reshkekirill@gmail.com> Reviewed-by: Amul Sul <sulamul@gmail.com> Reviewed-by: Zsolt Parragi <zsolt.parragi@cybertec.at> Reviewed-by: Andrew Dunstan <andrew@dunslane.net> Discussion: https://postgr.es/m/CACJufxHCh_FU-FsEwsCvg9mN6-5tzR6H9ntn+0KUgTCaerDOmg@mail.gmail.com
This commit is contained in:
Andrew Dunstan
parent
a9747153e1
commit
342051d73b
6 changed files with 423 additions and 12 deletions
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@ -578,8 +578,8 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
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<listitem>
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<para>
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This form alters the attributes of a constraint that was previously
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created. Currently only foreign key constraints may be altered in
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this fashion, but see below.
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created. Currently <literal>FOREIGN KEY</literal> and <literal>CHECK</literal>
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constraints may be altered in this fashion, but see below.
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</para>
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</listitem>
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</varlistentry>
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@ -404,6 +404,10 @@ static bool ATExecAlterFKConstrEnforceability(List **wqueue, ATAlterConstraint *
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Oid ReferencedParentUpdTrigger,
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Oid ReferencingParentInsTrigger,
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Oid ReferencingParentUpdTrigger);
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static bool ATExecAlterCheckConstrEnforceability(List **wqueue, ATAlterConstraint *cmdcon,
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Relation conrel, HeapTuple contuple,
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bool recurse, bool recursing,
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LOCKMODE lockmode);
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static bool ATExecAlterConstrDeferrability(List **wqueue, ATAlterConstraint *cmdcon,
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Relation conrel, Relation tgrel, Relation rel,
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HeapTuple contuple, bool recurse,
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@ -422,6 +426,10 @@ static void AlterFKConstrEnforceabilityRecurse(List **wqueue, ATAlterConstraint
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Oid ReferencedParentUpdTrigger,
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Oid ReferencingParentInsTrigger,
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Oid ReferencingParentUpdTrigger);
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static void AlterCheckConstrEnforceabilityRecurse(List **wqueue, ATAlterConstraint *cmdcon,
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Relation conrel, Oid conrelid,
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bool recurse, bool recursing,
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LOCKMODE lockmode);
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static void AlterConstrDeferrabilityRecurse(List **wqueue, ATAlterConstraint *cmdcon,
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Relation conrel, Relation tgrel, Relation rel,
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HeapTuple contuple, bool recurse,
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@ -12216,7 +12224,7 @@ GetForeignKeyCheckTriggers(Relation trigrel,
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*
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* Update the attributes of a constraint.
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*
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* Currently only works for Foreign Key and not null constraints.
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* Currently works for Foreign Key, Check, and not null constraints.
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*
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* If the constraint is modified, returns its address; otherwise, return
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* InvalidObjectAddress.
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@ -12278,11 +12286,13 @@ ATExecAlterConstraint(List **wqueue, Relation rel, ATAlterConstraint *cmdcon,
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(errcode(ERRCODE_WRONG_OBJECT_TYPE),
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errmsg("constraint \"%s\" of relation \"%s\" is not a foreign key constraint",
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cmdcon->conname, RelationGetRelationName(rel))));
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if (cmdcon->alterEnforceability && currcon->contype != CONSTRAINT_FOREIGN)
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if (cmdcon->alterEnforceability &&
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(currcon->contype != CONSTRAINT_FOREIGN && currcon->contype != CONSTRAINT_CHECK))
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ereport(ERROR,
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(errcode(ERRCODE_WRONG_OBJECT_TYPE),
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errmsg("cannot alter enforceability of constraint \"%s\" of relation \"%s\"",
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cmdcon->conname, RelationGetRelationName(rel))));
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cmdcon->conname, RelationGetRelationName(rel)),
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errhint("Only foreign key and check constraints can change enforceability.")));
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if (cmdcon->alterInheritability &&
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currcon->contype != CONSTRAINT_NOTNULL)
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ereport(ERROR,
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@ -12388,13 +12398,20 @@ ATExecAlterConstraintInternal(List **wqueue, ATAlterConstraint *cmdcon,
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* dropping the trigger, during which the deferrability setting will be
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* adjusted automatically.
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*/
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if (cmdcon->alterEnforceability &&
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ATExecAlterFKConstrEnforceability(wqueue, cmdcon, conrel, tgrel,
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currcon->conrelid, currcon->confrelid,
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contuple, lockmode, InvalidOid,
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InvalidOid, InvalidOid, InvalidOid))
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changed = true;
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if (cmdcon->alterEnforceability)
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{
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if (currcon->contype == CONSTRAINT_FOREIGN)
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changed = ATExecAlterFKConstrEnforceability(wqueue, cmdcon, conrel, tgrel,
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currcon->conrelid,
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currcon->confrelid,
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contuple, lockmode,
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InvalidOid, InvalidOid,
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InvalidOid, InvalidOid);
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else if (currcon->contype == CONSTRAINT_CHECK)
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changed = ATExecAlterCheckConstrEnforceability(wqueue, cmdcon, conrel,
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contuple, recurse, false,
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lockmode);
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}
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else if (cmdcon->alterDeferrability &&
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ATExecAlterConstrDeferrability(wqueue, cmdcon, conrel, tgrel, rel,
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contuple, recurse, &otherrelids,
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@ -12572,6 +12589,163 @@ ATExecAlterFKConstrEnforceability(List **wqueue, ATAlterConstraint *cmdcon,
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return changed;
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}
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/*
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* Returns true if the CHECK constraint's enforceability is altered.
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*/
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static bool
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ATExecAlterCheckConstrEnforceability(List **wqueue, ATAlterConstraint *cmdcon,
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Relation conrel, HeapTuple contuple,
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bool recurse, bool recursing, LOCKMODE lockmode)
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{
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Form_pg_constraint currcon;
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Relation rel;
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bool changed = false;
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List *children = NIL;
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/* Since this function recurses, it could be driven to stack overflow */
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check_stack_depth();
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Assert(cmdcon->alterEnforceability);
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currcon = (Form_pg_constraint) GETSTRUCT(contuple);
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Assert(currcon->contype == CONSTRAINT_CHECK);
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/*
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* Parent relation already locked by caller, children will be locked by
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* find_all_inheritors. So NoLock is fine here.
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*/
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rel = table_open(currcon->conrelid, NoLock);
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if (currcon->conenforced != cmdcon->is_enforced)
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{
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AlterConstrUpdateConstraintEntry(cmdcon, conrel, contuple);
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changed = true;
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}
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/*
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* Note that we must recurse even when trying to change a check constraint
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* to not enforced if it is already not enforced, in case descendant
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* constraints might be enforced and need to be changed to not enforced.
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* Conversely, we should do nothing if a constraint is being set to
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* enforced and is already enforced, as descendant constraints cannot be
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* different in that case.
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*/
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if (!cmdcon->is_enforced || changed)
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{
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/*
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* If we're recursing, the parent has already done this, so skip it.
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* Also, if the constraint is a NO INHERIT constraint, we shouldn't
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* try to look for it in the children.
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*/
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if (!recursing && !currcon->connoinherit)
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children = find_all_inheritors(RelationGetRelid(rel),
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lockmode, NULL);
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foreach_oid(childoid, children)
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{
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if (childoid == RelationGetRelid(rel))
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continue;
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/*
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* If we are told not to recurse, there had better not be any
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* child tables, because we can't change constraint enforceability
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* on the parent unless we have changed enforceability for all
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* child.
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*/
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if (!recurse)
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ereport(ERROR,
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errcode(ERRCODE_INVALID_TABLE_DEFINITION),
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errmsg("constraint must be altered on child tables too"),
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errhint("Do not specify the ONLY keyword."));
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AlterCheckConstrEnforceabilityRecurse(wqueue, cmdcon, conrel,
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childoid, false, true,
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lockmode);
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}
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}
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/*
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* Tell Phase 3 to check that the constraint is satisfied by existing
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* rows. We only need do this when altering the constraint from NOT
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* ENFORCED to ENFORCED.
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*/
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if (rel->rd_rel->relkind == RELKIND_RELATION &&
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!currcon->conenforced &&
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cmdcon->is_enforced)
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{
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AlteredTableInfo *tab;
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NewConstraint *newcon;
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Datum val;
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char *conbin;
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newcon = palloc0_object(NewConstraint);
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newcon->name = pstrdup(NameStr(currcon->conname));
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newcon->contype = CONSTR_CHECK;
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val = SysCacheGetAttrNotNull(CONSTROID, contuple,
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Anum_pg_constraint_conbin);
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conbin = TextDatumGetCString(val);
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newcon->qual = expand_generated_columns_in_expr(stringToNode(conbin), rel, 1);
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/* Find or create work queue entry for this table */
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tab = ATGetQueueEntry(wqueue, rel);
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tab->constraints = lappend(tab->constraints, newcon);
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}
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table_close(rel, NoLock);
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return changed;
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}
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/*
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* Invokes ATExecAlterCheckConstrEnforceability for each CHECK constraint that
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* is a child of the specified constraint.
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*
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* We rely on the parent and child tables having identical CHECK constraint
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* names to retrieve the child's pg_constraint tuple.
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*
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* The arguments to this function have the same meaning as the arguments to
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* ATExecAlterCheckConstrEnforceability.
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*/
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static void
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AlterCheckConstrEnforceabilityRecurse(List **wqueue, ATAlterConstraint *cmdcon,
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Relation conrel, Oid conrelid,
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bool recurse, bool recursing,
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LOCKMODE lockmode)
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{
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SysScanDesc pscan;
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HeapTuple childtup;
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ScanKeyData skey[3];
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ScanKeyInit(&skey[0],
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Anum_pg_constraint_conrelid,
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BTEqualStrategyNumber, F_OIDEQ,
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ObjectIdGetDatum(conrelid));
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ScanKeyInit(&skey[1],
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Anum_pg_constraint_contypid,
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BTEqualStrategyNumber, F_OIDEQ,
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ObjectIdGetDatum(InvalidOid));
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ScanKeyInit(&skey[2],
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Anum_pg_constraint_conname,
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BTEqualStrategyNumber, F_NAMEEQ,
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CStringGetDatum(cmdcon->conname));
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pscan = systable_beginscan(conrel, ConstraintRelidTypidNameIndexId, true,
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NULL, 3, skey);
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if (!HeapTupleIsValid(childtup = systable_getnext(pscan)))
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ereport(ERROR,
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errcode(ERRCODE_UNDEFINED_OBJECT),
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errmsg("constraint \"%s\" of relation \"%s\" does not exist",
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cmdcon->conname, get_rel_name(conrelid)));
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ATExecAlterCheckConstrEnforceability(wqueue, cmdcon, conrel, childtup,
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recurse, recursing, lockmode);
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systable_endscan(pscan);
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}
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/*
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* Returns true if the constraint's deferrability is altered.
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*
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@ -390,6 +390,84 @@ SELECT * FROM COPY_TBL;
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6 | OK | 4
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(2 rows)
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--
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-- CHECK constraints
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-- ALTER TABLE ALTER CONSTRAINT [NOT] ENFORCED
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create table parted_ch(
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a int, b int,
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constraint cc check (a > 10) not enforced,
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constraint cc_1 check (b < 17) not enforced
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) partition by range(a);
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create table parted_ch_1 partition of parted_ch for values from (0) to (10) partition by list(b);
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create table parted_ch_11 partition of parted_ch_1 for values in (0, 1, 22,4);
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create table parted_ch_12 partition of parted_ch_1 for values in (2);
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create table parted_ch_2(b int, a int,
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constraint cc check (a > 10) not enforced,
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constraint cc_1 check (b < 17) enforced,
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constraint cc_2 check( a < 15) not enforced
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);
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alter table parted_ch attach partition parted_ch_2 for values from (10) to (20);
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insert into parted_ch values (1, 22), (9, 1), (16, 16);
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alter table parted_ch alter constraint cc_1 enforced; --error
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ERROR: check constraint "cc_1" of relation "parted_ch_11" is violated by some row
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update parted_ch set b = 4 where b = 22;
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alter table parted_ch alter constraint cc_1 enforced; --ok
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create or replace view check_constraint_status as
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select conname, conrelid::regclass, conenforced, convalidated
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from pg_constraint
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where conrelid::regclass::text ~* '^parted_ch' and contype = 'c'
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order by conname, conrelid::regclass::text collate "C";
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alter table parted_ch alter constraint cc not enforced; --no-op
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alter table parted_ch alter constraint cc enforced; --error
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ERROR: check constraint "cc" of relation "parted_ch_11" is violated by some row
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delete from parted_ch where a = 1;
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alter table parted_ch alter constraint cc enforced; --error
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ERROR: check constraint "cc" of relation "parted_ch_11" is violated by some row
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delete from parted_ch where a = 9;
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alter table parted_ch alter constraint cc enforced;
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--check these CHECK constraint status
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select * from check_constraint_status;
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conname | conrelid | conenforced | convalidated
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---------+--------------+-------------+--------------
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cc | parted_ch | t | t
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cc | parted_ch_1 | t | t
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cc | parted_ch_11 | t | t
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cc | parted_ch_12 | t | t
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cc | parted_ch_2 | t | t
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cc_1 | parted_ch | t | t
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cc_1 | parted_ch_1 | t | t
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cc_1 | parted_ch_11 | t | t
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cc_1 | parted_ch_12 | t | t
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cc_1 | parted_ch_2 | t | t
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cc_2 | parted_ch_2 | f | f
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(11 rows)
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alter table parted_ch_2 alter constraint cc_2 enforced; --error
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ERROR: check constraint "cc_2" of relation "parted_ch_2" is violated by some row
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delete from parted_ch where a = 16;
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alter table parted_ch_2 alter constraint cc_2 enforced;
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alter table parted_ch_2 alter constraint cc not enforced;
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alter table parted_ch_2 alter constraint cc_1 not enforced;
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alter table parted_ch_2 alter constraint cc_2 not enforced;
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--check these CHECK constraint status again
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select * from check_constraint_status;
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conname | conrelid | conenforced | convalidated
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---------+--------------+-------------+--------------
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cc | parted_ch | t | t
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cc | parted_ch_1 | t | t
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cc | parted_ch_11 | t | t
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cc | parted_ch_12 | t | t
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cc | parted_ch_2 | f | f
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cc_1 | parted_ch | t | t
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cc_1 | parted_ch_1 | t | t
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cc_1 | parted_ch_11 | t | t
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cc_1 | parted_ch_12 | t | t
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cc_1 | parted_ch_2 | f | f
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cc_2 | parted_ch_2 | f | f
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(11 rows)
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drop table parted_ch;
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drop view check_constraint_status;
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--
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-- Primary keys
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--
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@ -746,8 +824,10 @@ LINE 1: CREATE TABLE UNIQUE_NOTEN_TBL(i int UNIQUE NOT ENFORCED);
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^
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ALTER TABLE unique_tbl ALTER CONSTRAINT unique_tbl_i_key ENFORCED;
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ERROR: cannot alter enforceability of constraint "unique_tbl_i_key" of relation "unique_tbl"
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HINT: Only foreign key and check constraints can change enforceability.
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ALTER TABLE unique_tbl ALTER CONSTRAINT unique_tbl_i_key NOT ENFORCED;
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ERROR: cannot alter enforceability of constraint "unique_tbl_i_key" of relation "unique_tbl"
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HINT: Only foreign key and check constraints can change enforceability.
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-- can't make an existing constraint NOT VALID
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ALTER TABLE unique_tbl ALTER CONSTRAINT unique_tbl_i_key NOT VALID;
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ERROR: constraints cannot be altered to be NOT VALID
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@ -1421,11 +1421,54 @@ order by 1, 2;
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p1_c3 | inh_check_constraint9 | f | 2 | t | t
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(38 rows)
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--
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-- CHECK constraints
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-- ALTER TABLE ALTER CONSTRAINT [NOT] ENFORCED
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alter table p1 drop constraint inh_check_constraint1;
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alter table p1_c1 drop constraint inh_check_constraint1;
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alter table only p1 alter constraint inh_check_constraint3 enforced; --error
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ERROR: constraint must be altered on child tables too
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HINT: Do not specify the ONLY keyword.
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alter table only p1 alter constraint inh_check_constraint3 not enforced; --error
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ERROR: constraint must be altered on child tables too
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HINT: Do not specify the ONLY keyword.
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insert into p1_c1 values(-2);
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insert into p1_c3 values(-3);
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alter table p1 alter constraint inh_check_constraint3 enforced; --error
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ERROR: check constraint "inh_check_constraint3" of relation "p1_c1" is violated by some row
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delete from only p1_c1 where f1 = -2;
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alter table p1_c1 alter constraint inh_check_constraint3 enforced; --error
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ERROR: check constraint "inh_check_constraint3" of relation "p1_c3" is violated by some row
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delete from only p1_c3 where f1 = -3;
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alter table p1 alter constraint inh_check_constraint3 enforced; --ok
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alter table p1 alter constraint inh_check_constraint3 not enforced; --ok
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select conname, conenforced, convalidated, conrelid::regclass
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from pg_constraint
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where conname = 'inh_check_constraint3' and contype = 'c'
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order by conrelid::regclass::text collate "C";
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conname | conenforced | convalidated | conrelid
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-----------------------+-------------+--------------+----------
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inh_check_constraint3 | f | f | p1
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inh_check_constraint3 | f | f | p1_c1
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inh_check_constraint3 | f | f | p1_c2
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inh_check_constraint3 | f | f | p1_c3
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(4 rows)
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drop table p1 cascade;
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NOTICE: drop cascades to 3 other objects
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DETAIL: drop cascades to table p1_c1
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drop cascades to table p1_c2
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drop cascades to table p1_c3
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--for "no inherit" check constraint, it will not recurse to child table
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create table p1(f1 int constraint p1_a_check check (f1 > 0) no inherit not enforced);
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create table p1_c1(f1 int constraint p1_a_check check (f1 > 0) not enforced);
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alter table p1_c1 inherit p1;
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insert into p1_c1 values(-11);
|
||||
alter table p1 alter constraint p1_a_check enforced; --ok
|
||||
alter table p1_c1 alter constraint p1_a_check enforced; --error
|
||||
ERROR: check constraint "p1_a_check" of relation "p1_c1" is violated by some row
|
||||
drop table p1 cascade;
|
||||
NOTICE: drop cascades to table p1_c1
|
||||
--
|
||||
-- Similarly, check the merging of existing constraints; a parent constraint
|
||||
-- marked as NOT ENFORCED can merge with an ENFORCED child constraint, but the
|
||||
|
|
@ -1434,6 +1477,25 @@ drop cascades to table p1_c3
|
|||
create table p1(f1 int constraint p1_a_check check (f1 > 0) not enforced);
|
||||
create table p1_c1(f1 int constraint p1_a_check check (f1 > 0) enforced);
|
||||
alter table p1_c1 inherit p1;
|
||||
insert into p1 values(-1); --ok
|
||||
insert into p1_c1 values(-1); --error
|
||||
ERROR: new row for relation "p1_c1" violates check constraint "p1_a_check"
|
||||
DETAIL: Failing row contains (-1).
|
||||
alter table p1 alter constraint p1_a_check enforced; --error
|
||||
ERROR: check constraint "p1_a_check" of relation "p1" is violated by some row
|
||||
truncate p1;
|
||||
alter table p1 alter constraint p1_a_check enforced; --ok
|
||||
alter table p1 alter constraint p1_a_check not enforced; --ok
|
||||
select conname, conenforced, convalidated, conrelid::regclass
|
||||
from pg_constraint
|
||||
where conname = 'p1_a_check' and contype = 'c'
|
||||
order by conrelid::regclass::text collate "C";
|
||||
conname | conenforced | convalidated | conrelid
|
||||
------------+-------------+--------------+----------
|
||||
p1_a_check | f | f | p1
|
||||
p1_a_check | f | f | p1_c1
|
||||
(2 rows)
|
||||
|
||||
drop table p1 cascade;
|
||||
NOTICE: drop cascades to table p1_c1
|
||||
create table p1(f1 int constraint p1_a_check check (f1 > 0) enforced);
|
||||
|
|
|
|||
|
|
@ -266,6 +266,58 @@ COPY COPY_TBL FROM :'filename';
|
|||
|
||||
SELECT * FROM COPY_TBL;
|
||||
|
||||
--
|
||||
-- CHECK constraints
|
||||
-- ALTER TABLE ALTER CONSTRAINT [NOT] ENFORCED
|
||||
create table parted_ch(
|
||||
a int, b int,
|
||||
constraint cc check (a > 10) not enforced,
|
||||
constraint cc_1 check (b < 17) not enforced
|
||||
) partition by range(a);
|
||||
create table parted_ch_1 partition of parted_ch for values from (0) to (10) partition by list(b);
|
||||
create table parted_ch_11 partition of parted_ch_1 for values in (0, 1, 22,4);
|
||||
create table parted_ch_12 partition of parted_ch_1 for values in (2);
|
||||
create table parted_ch_2(b int, a int,
|
||||
constraint cc check (a > 10) not enforced,
|
||||
constraint cc_1 check (b < 17) enforced,
|
||||
constraint cc_2 check( a < 15) not enforced
|
||||
);
|
||||
alter table parted_ch attach partition parted_ch_2 for values from (10) to (20);
|
||||
|
||||
insert into parted_ch values (1, 22), (9, 1), (16, 16);
|
||||
|
||||
alter table parted_ch alter constraint cc_1 enforced; --error
|
||||
update parted_ch set b = 4 where b = 22;
|
||||
alter table parted_ch alter constraint cc_1 enforced; --ok
|
||||
|
||||
create or replace view check_constraint_status as
|
||||
select conname, conrelid::regclass, conenforced, convalidated
|
||||
from pg_constraint
|
||||
where conrelid::regclass::text ~* '^parted_ch' and contype = 'c'
|
||||
order by conname, conrelid::regclass::text collate "C";
|
||||
|
||||
alter table parted_ch alter constraint cc not enforced; --no-op
|
||||
alter table parted_ch alter constraint cc enforced; --error
|
||||
delete from parted_ch where a = 1;
|
||||
alter table parted_ch alter constraint cc enforced; --error
|
||||
delete from parted_ch where a = 9;
|
||||
alter table parted_ch alter constraint cc enforced;
|
||||
|
||||
--check these CHECK constraint status
|
||||
select * from check_constraint_status;
|
||||
|
||||
alter table parted_ch_2 alter constraint cc_2 enforced; --error
|
||||
delete from parted_ch where a = 16;
|
||||
alter table parted_ch_2 alter constraint cc_2 enforced;
|
||||
alter table parted_ch_2 alter constraint cc not enforced;
|
||||
alter table parted_ch_2 alter constraint cc_1 not enforced;
|
||||
alter table parted_ch_2 alter constraint cc_2 not enforced;
|
||||
|
||||
--check these CHECK constraint status again
|
||||
select * from check_constraint_status;
|
||||
drop table parted_ch;
|
||||
drop view check_constraint_status;
|
||||
|
||||
--
|
||||
-- Primary keys
|
||||
--
|
||||
|
|
|
|||
|
|
@ -510,6 +510,38 @@ select conrelid::regclass::text as relname, conname, conislocal, coninhcount, co
|
|||
from pg_constraint where conname like 'inh\_check\_constraint%'
|
||||
order by 1, 2;
|
||||
|
||||
--
|
||||
-- CHECK constraints
|
||||
-- ALTER TABLE ALTER CONSTRAINT [NOT] ENFORCED
|
||||
alter table p1 drop constraint inh_check_constraint1;
|
||||
alter table p1_c1 drop constraint inh_check_constraint1;
|
||||
|
||||
alter table only p1 alter constraint inh_check_constraint3 enforced; --error
|
||||
alter table only p1 alter constraint inh_check_constraint3 not enforced; --error
|
||||
|
||||
insert into p1_c1 values(-2);
|
||||
insert into p1_c3 values(-3);
|
||||
|
||||
alter table p1 alter constraint inh_check_constraint3 enforced; --error
|
||||
delete from only p1_c1 where f1 = -2;
|
||||
alter table p1_c1 alter constraint inh_check_constraint3 enforced; --error
|
||||
|
||||
delete from only p1_c3 where f1 = -3;
|
||||
alter table p1 alter constraint inh_check_constraint3 enforced; --ok
|
||||
alter table p1 alter constraint inh_check_constraint3 not enforced; --ok
|
||||
select conname, conenforced, convalidated, conrelid::regclass
|
||||
from pg_constraint
|
||||
where conname = 'inh_check_constraint3' and contype = 'c'
|
||||
order by conrelid::regclass::text collate "C";
|
||||
drop table p1 cascade;
|
||||
|
||||
--for "no inherit" check constraint, it will not recurse to child table
|
||||
create table p1(f1 int constraint p1_a_check check (f1 > 0) no inherit not enforced);
|
||||
create table p1_c1(f1 int constraint p1_a_check check (f1 > 0) not enforced);
|
||||
alter table p1_c1 inherit p1;
|
||||
insert into p1_c1 values(-11);
|
||||
alter table p1 alter constraint p1_a_check enforced; --ok
|
||||
alter table p1_c1 alter constraint p1_a_check enforced; --error
|
||||
drop table p1 cascade;
|
||||
|
||||
--
|
||||
|
|
@ -520,6 +552,17 @@ drop table p1 cascade;
|
|||
create table p1(f1 int constraint p1_a_check check (f1 > 0) not enforced);
|
||||
create table p1_c1(f1 int constraint p1_a_check check (f1 > 0) enforced);
|
||||
alter table p1_c1 inherit p1;
|
||||
insert into p1 values(-1); --ok
|
||||
insert into p1_c1 values(-1); --error
|
||||
alter table p1 alter constraint p1_a_check enforced; --error
|
||||
truncate p1;
|
||||
alter table p1 alter constraint p1_a_check enforced; --ok
|
||||
alter table p1 alter constraint p1_a_check not enforced; --ok
|
||||
|
||||
select conname, conenforced, convalidated, conrelid::regclass
|
||||
from pg_constraint
|
||||
where conname = 'p1_a_check' and contype = 'c'
|
||||
order by conrelid::regclass::text collate "C";
|
||||
drop table p1 cascade;
|
||||
|
||||
create table p1(f1 int constraint p1_a_check check (f1 > 0) enforced);
|
||||
|
|
|
|||
Loading…
Reference in a new issue