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Support ALTER THING .. DEPENDS ON EXTENSION

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This introduces a new dependency type which marks an object as depending
on an extension, such that if the extension is dropped, the object
automatically goes away; and also, if the database is dumped, the object
is included in the dump output.  Currently the grammar supports this for
indexes, triggers, materialized views and functions only, although the
utility code is generic so adding support for more object types is a
matter of touching the parser rules only.

Author: Abhijit Menon-Sen
Reviewed-by: Alexander Korotkov, Álvaro Herrera
Discussion: http://www.postgresql.org/message-id/20160115062649.GA5068@toroid.org
This commit is contained in:
Alvaro Herrera
2016-04-05 18:38:54 -03:00
parent 41ea0c2376
commit f2fcad27d5
23 changed files with 524 additions and 5 deletions
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17
src/backend/nodes/copyfuncs.c
View File

@ -3204,6 +3204,20 @@ _copyRenameStmt(const RenameStmt *from)
return newnode;
}
static AlterObjectDependsStmt *
_copyAlterObjectDependsStmt(const AlterObjectDependsStmt *from)
{
AlterObjectDependsStmt *newnode = makeNode(AlterObjectDependsStmt);
COPY_SCALAR_FIELD(objectType);
COPY_NODE_FIELD(relation);
COPY_NODE_FIELD(objname);
COPY_NODE_FIELD(objargs);
COPY_NODE_FIELD(extname);
return newnode;
}
static AlterObjectSchemaStmt *
_copyAlterObjectSchemaStmt(const AlterObjectSchemaStmt *from)
{
@ -4682,6 +4696,9 @@ copyObject(const void *from)
case T_RenameStmt:
retval = _copyRenameStmt(from);
break;
case T_AlterObjectDependsStmt:
retval = _copyAlterObjectDependsStmt(from);
break;
case T_AlterObjectSchemaStmt:
retval = _copyAlterObjectSchemaStmt(from);
break;

15
src/backend/nodes/equalfuncs.c
View File

@ -1325,6 +1325,18 @@ _equalRenameStmt(const RenameStmt *a, const RenameStmt *b)
return true;
}
static bool
_equalAlterObjectDependsStmt(const AlterObjectDependsStmt *a, const AlterObjectDependsStmt *b)
{
COMPARE_SCALAR_FIELD(objectType);
COMPARE_NODE_FIELD(relation);
COMPARE_NODE_FIELD(objname);
COMPARE_NODE_FIELD(objargs);
COMPARE_NODE_FIELD(extname);
return true;
}
static bool
_equalAlterObjectSchemaStmt(const AlterObjectSchemaStmt *a, const AlterObjectSchemaStmt *b)
{
@ -3004,6 +3016,9 @@ equal(const void *a, const void *b)
case T_RenameStmt:
retval = _equalRenameStmt(a, b);
break;
case T_AlterObjectDependsStmt:
retval = _equalAlterObjectDependsStmt(a, b);
break;
case T_AlterObjectSchemaStmt:
retval = _equalAlterObjectSchemaStmt(a, b);
break;