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Merge the Constraint and FkConstraint node types into a single type.

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This was foreseen to be a good idea long ago, but nobody had got round
to doing it.  The recent patch for deferred unique constraints made
transformConstraintAttrs() ugly enough that I decided it was time.
This change will also greatly simplify parsing of deferred CHECK constraints,
if anyone ever gets around to implementing that.

While at it, add a location field to Constraint, and use that to provide
an error cursor for some of the constraint-related error messages.
This commit is contained in:
Tom Lane
2009-07-30 02:45:38 +00:00
parent 78aef14c59
commit 060baf2784
12 changed files with 394 additions and 515 deletions
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101
src/backend/nodes/outfuncs.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.362 2009/07/29 20:56:19 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.363 2009/07/30 02:45:37 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -2277,33 +2277,20 @@ _outConstraint(StringInfo str, Constraint *node)
{
WRITE_NODE_TYPE("CONSTRAINT");
WRITE_STRING_FIELD(name);
WRITE_STRING_FIELD(conname);
WRITE_BOOL_FIELD(deferrable);
WRITE_BOOL_FIELD(initdeferred);
WRITE_LOCATION_FIELD(location);
appendStringInfo(str, " :contype ");
switch (node->contype)
{
case CONSTR_PRIMARY:
appendStringInfo(str, "PRIMARY_KEY");
WRITE_NODE_FIELD(keys);
WRITE_NODE_FIELD(options);
WRITE_STRING_FIELD(indexspace);
WRITE_BOOL_FIELD(deferrable);
WRITE_BOOL_FIELD(initdeferred);
case CONSTR_NULL:
appendStringInfo(str, "NULL");
break;
case CONSTR_UNIQUE:
appendStringInfo(str, "UNIQUE");
WRITE_NODE_FIELD(keys);
WRITE_NODE_FIELD(options);
WRITE_STRING_FIELD(indexspace);
WRITE_BOOL_FIELD(deferrable);
WRITE_BOOL_FIELD(initdeferred);
break;
case CONSTR_CHECK:
appendStringInfo(str, "CHECK");
WRITE_NODE_FIELD(raw_expr);
WRITE_STRING_FIELD(cooked_expr);
case CONSTR_NOTNULL:
appendStringInfo(str, "NOT_NULL");
break;
case CONSTR_DEFAULT:
@ -2312,33 +2299,60 @@ _outConstraint(StringInfo str, Constraint *node)
WRITE_STRING_FIELD(cooked_expr);
break;
case CONSTR_NOTNULL:
appendStringInfo(str, "NOT_NULL");
case CONSTR_CHECK:
appendStringInfo(str, "CHECK");
WRITE_NODE_FIELD(raw_expr);
WRITE_STRING_FIELD(cooked_expr);
break;
case CONSTR_PRIMARY:
appendStringInfo(str, "PRIMARY_KEY");
WRITE_NODE_FIELD(keys);
WRITE_NODE_FIELD(options);
WRITE_STRING_FIELD(indexspace);
break;
case CONSTR_UNIQUE:
appendStringInfo(str, "UNIQUE");
WRITE_NODE_FIELD(keys);
WRITE_NODE_FIELD(options);
WRITE_STRING_FIELD(indexspace);
break;
case CONSTR_FOREIGN:
appendStringInfo(str, "FOREIGN_KEY");
WRITE_NODE_FIELD(pktable);
WRITE_NODE_FIELD(fk_attrs);
WRITE_NODE_FIELD(pk_attrs);
WRITE_CHAR_FIELD(fk_matchtype);
WRITE_CHAR_FIELD(fk_upd_action);
WRITE_CHAR_FIELD(fk_del_action);
WRITE_BOOL_FIELD(skip_validation);
break;
case CONSTR_ATTR_DEFERRABLE:
appendStringInfo(str, "ATTR_DEFERRABLE");
break;
case CONSTR_ATTR_NOT_DEFERRABLE:
appendStringInfo(str, "ATTR_NOT_DEFERRABLE");
break;
case CONSTR_ATTR_DEFERRED:
appendStringInfo(str, "ATTR_DEFERRED");
break;
case CONSTR_ATTR_IMMEDIATE:
appendStringInfo(str, "ATTR_IMMEDIATE");
break;
default:
appendStringInfo(str, "<unrecognized_constraint>");
appendStringInfo(str, "<unrecognized_constraint %d>",
(int) node->contype);
break;
}
}
static void
_outFkConstraint(StringInfo str, FkConstraint *node)
{
WRITE_NODE_TYPE("FKCONSTRAINT");
WRITE_STRING_FIELD(constr_name);
WRITE_NODE_FIELD(pktable);
WRITE_NODE_FIELD(fk_attrs);
WRITE_NODE_FIELD(pk_attrs);
WRITE_CHAR_FIELD(fk_matchtype);
WRITE_CHAR_FIELD(fk_upd_action);
WRITE_CHAR_FIELD(fk_del_action);
WRITE_BOOL_FIELD(deferrable);
WRITE_BOOL_FIELD(initdeferred);
WRITE_BOOL_FIELD(skip_validation);
}
/*
* _outNode -
@ -2765,9 +2779,6 @@ _outNode(StringInfo str, void *obj)
case T_Constraint:
_outConstraint(str, obj);
break;
case T_FkConstraint:
_outFkConstraint(str, obj);
break;
case T_FuncCall:
_outFuncCall(str, obj);
break;