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First phase of applying Rod Taylor's pg_depend patch. This just adds

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RESTRICT/CASCADE syntax to the DROP commands that need it, and propagates
the behavioral option through the parser to the routines that execute
drops.  Doesn't do anything useful yet, but I figured I'd commit these
changes so I could get out of the parser area while working on the rest.
This commit is contained in:
Tom Lane
2002-07-01 15:27:56 +00:00
parent a3ec44a5d3
commit 131f801d37
13 changed files with 111 additions and 101 deletions
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21
src/include/nodes/parsenodes.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parsenodes.h,v 1.182 2002/06/20 20:29:51 momjian Exp $
* $Id: parsenodes.h,v 1.183 2002/07/01 15:27:56 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -737,6 +737,12 @@ typedef struct CreateSchemaStmt
List *schemaElts; /* schema components (list of parsenodes) */
} CreateSchemaStmt;
typedef enum DropBehavior
{
DROP_RESTRICT, /* drop fails if any dependent objects */
DROP_CASCADE /* remove dependent objects too */
} DropBehavior;
/* ----------------------
* Alter Table
*
@@ -765,7 +771,7 @@ typedef struct AlterTableStmt
char *name; /* column or constraint name to act on, or
* new owner */
Node *def; /* definition of new column or constraint */
int behavior; /* CASCADE or RESTRICT drop behavior */
DropBehavior behavior; /* RESTRICT or CASCADE for DROP cases */
} AlterTableStmt;
/* ----------------------
@@ -996,6 +1002,7 @@ typedef struct DropPLangStmt
{
NodeTag type;
char *plname; /* PL name */
DropBehavior behavior; /* RESTRICT or CASCADE behavior */
} DropPLangStmt;
/* ----------------------
@@ -1107,8 +1114,8 @@ typedef struct DropStmt
{
NodeTag type;
List *objects; /* list of sublists of names (as Values) */
int removeType;
int behavior; /* CASCADE or RESTRICT drop behavior */
int removeType; /* see #defines above */
DropBehavior behavior; /* RESTRICT or CASCADE behavior */
} DropStmt;
/* ----------------------
@@ -1127,7 +1134,8 @@ typedef struct DropPropertyStmt
NodeTag type;
RangeVar *relation; /* owning relation */
char *property; /* name of rule, trigger, etc */
int removeType;
int removeType; /* see #defines above */
DropBehavior behavior; /* RESTRICT or CASCADE behavior */
} DropPropertyStmt;
/* ----------------------
@@ -1218,6 +1226,7 @@ typedef struct RemoveAggrStmt
NodeTag type;
List *aggname; /* aggregate to drop */
TypeName *aggtype; /* TypeName for input datatype, or NULL */
DropBehavior behavior; /* RESTRICT or CASCADE behavior */
} RemoveAggrStmt;
/* ----------------------
@@ -1229,6 +1238,7 @@ typedef struct RemoveFuncStmt
NodeTag type;
List *funcname; /* function to drop */
List *args; /* types of the arguments */
DropBehavior behavior; /* RESTRICT or CASCADE behavior */
} RemoveFuncStmt;
/* ----------------------
@@ -1240,6 +1250,7 @@ typedef struct RemoveOperStmt
NodeTag type;
List *opname; /* operator to drop */
List *args; /* types of the arguments */
DropBehavior behavior; /* RESTRICT or CASCADE behavior */
} RemoveOperStmt;
/* ----------------------