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a2e35b53c3
The changed routines are mostly those that can be directly called by
ProcessUtilitySlow; the intention is to make the affected object
information more precise, in support for future event trigger changes.
Originally it was envisioned that the OID of the affected object would
be enough, and in most cases that is correct, but upon actually
implementing the event trigger changes it turned out that ObjectAddress
is more widely useful.
Additionally, some command execution routines grew an output argument
that's an object address which provides further info about the executed
command. To wit:
* for ALTER DOMAIN / ADD CONSTRAINT, it corresponds to the address of
the new constraint
* for ALTER OBJECT / SET SCHEMA, it corresponds to the address of the
schema that originally contained the object.
* for ALTER EXTENSION {ADD, DROP} OBJECT, it corresponds to the address
of the object added to or dropped from the extension.
There's no user-visible change in this commit, and no functional change
either.
Discussion: 20150218213255.GC6717@tamriel.snowman.net
Reviewed-By: Stephen Frost, Andres Freund
399 lines
13 KiB
C
399 lines
13 KiB
C
/*-------------------------------------------------------------------------
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*
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* aggregatecmds.c
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*
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* Routines for aggregate-manipulation commands
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*
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* Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/backend/commands/aggregatecmds.c
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*
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* DESCRIPTION
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* The "DefineFoo" routines take the parse tree and pick out the
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* appropriate arguments/flags, passing the results to the
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* corresponding "FooDefine" routines (in src/catalog) that do
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* the actual catalog-munging. These routines also verify permission
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* of the user to execute the command.
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "access/heapam.h"
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#include "access/htup_details.h"
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#include "catalog/dependency.h"
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#include "catalog/indexing.h"
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#include "catalog/pg_aggregate.h"
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#include "catalog/pg_proc.h"
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#include "catalog/pg_type.h"
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#include "commands/alter.h"
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#include "commands/defrem.h"
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#include "miscadmin.h"
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#include "parser/parse_func.h"
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#include "parser/parse_type.h"
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#include "utils/acl.h"
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#include "utils/builtins.h"
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#include "utils/lsyscache.h"
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#include "utils/syscache.h"
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/*
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* DefineAggregate
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*
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* "oldstyle" signals the old (pre-8.2) style where the aggregate input type
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* is specified by a BASETYPE element in the parameters. Otherwise,
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* "args" is a pair, whose first element is a list of FunctionParameter structs
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* defining the agg's arguments (both direct and aggregated), and whose second
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* element is an Integer node with the number of direct args, or -1 if this
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* isn't an ordered-set aggregate.
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* "parameters" is a list of DefElem representing the agg's definition clauses.
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*/
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ObjectAddress
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DefineAggregate(List *name, List *args, bool oldstyle, List *parameters,
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const char *queryString)
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{
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char *aggName;
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Oid aggNamespace;
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AclResult aclresult;
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char aggKind = AGGKIND_NORMAL;
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List *transfuncName = NIL;
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List *finalfuncName = NIL;
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List *mtransfuncName = NIL;
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List *minvtransfuncName = NIL;
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List *mfinalfuncName = NIL;
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bool finalfuncExtraArgs = false;
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bool mfinalfuncExtraArgs = false;
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List *sortoperatorName = NIL;
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TypeName *baseType = NULL;
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TypeName *transType = NULL;
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TypeName *mtransType = NULL;
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int32 transSpace = 0;
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int32 mtransSpace = 0;
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char *initval = NULL;
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char *minitval = NULL;
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int numArgs;
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int numDirectArgs = 0;
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oidvector *parameterTypes;
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ArrayType *allParameterTypes;
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ArrayType *parameterModes;
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ArrayType *parameterNames;
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List *parameterDefaults;
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Oid variadicArgType;
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Oid transTypeId;
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Oid mtransTypeId = InvalidOid;
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char transTypeType;
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char mtransTypeType = 0;
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ListCell *pl;
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/* Convert list of names to a name and namespace */
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aggNamespace = QualifiedNameGetCreationNamespace(name, &aggName);
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/* Check we have creation rights in target namespace */
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aclresult = pg_namespace_aclcheck(aggNamespace, GetUserId(), ACL_CREATE);
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if (aclresult != ACLCHECK_OK)
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aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
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get_namespace_name(aggNamespace));
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/* Deconstruct the output of the aggr_args grammar production */
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if (!oldstyle)
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{
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Assert(list_length(args) == 2);
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numDirectArgs = intVal(lsecond(args));
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if (numDirectArgs >= 0)
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aggKind = AGGKIND_ORDERED_SET;
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else
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numDirectArgs = 0;
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args = (List *) linitial(args);
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}
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/* Examine aggregate's definition clauses */
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foreach(pl, parameters)
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{
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DefElem *defel = (DefElem *) lfirst(pl);
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/*
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* sfunc1, stype1, and initcond1 are accepted as obsolete spellings
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* for sfunc, stype, initcond.
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*/
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if (pg_strcasecmp(defel->defname, "sfunc") == 0)
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transfuncName = defGetQualifiedName(defel);
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else if (pg_strcasecmp(defel->defname, "sfunc1") == 0)
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transfuncName = defGetQualifiedName(defel);
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else if (pg_strcasecmp(defel->defname, "finalfunc") == 0)
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finalfuncName = defGetQualifiedName(defel);
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else if (pg_strcasecmp(defel->defname, "msfunc") == 0)
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mtransfuncName = defGetQualifiedName(defel);
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else if (pg_strcasecmp(defel->defname, "minvfunc") == 0)
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minvtransfuncName = defGetQualifiedName(defel);
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else if (pg_strcasecmp(defel->defname, "mfinalfunc") == 0)
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mfinalfuncName = defGetQualifiedName(defel);
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else if (pg_strcasecmp(defel->defname, "finalfunc_extra") == 0)
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finalfuncExtraArgs = defGetBoolean(defel);
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else if (pg_strcasecmp(defel->defname, "mfinalfunc_extra") == 0)
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mfinalfuncExtraArgs = defGetBoolean(defel);
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else if (pg_strcasecmp(defel->defname, "sortop") == 0)
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sortoperatorName = defGetQualifiedName(defel);
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else if (pg_strcasecmp(defel->defname, "basetype") == 0)
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baseType = defGetTypeName(defel);
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else if (pg_strcasecmp(defel->defname, "hypothetical") == 0)
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{
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if (defGetBoolean(defel))
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{
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if (aggKind == AGGKIND_NORMAL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("only ordered-set aggregates can be hypothetical")));
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aggKind = AGGKIND_HYPOTHETICAL;
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}
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}
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else if (pg_strcasecmp(defel->defname, "stype") == 0)
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transType = defGetTypeName(defel);
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else if (pg_strcasecmp(defel->defname, "stype1") == 0)
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transType = defGetTypeName(defel);
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else if (pg_strcasecmp(defel->defname, "sspace") == 0)
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transSpace = defGetInt32(defel);
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else if (pg_strcasecmp(defel->defname, "mstype") == 0)
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mtransType = defGetTypeName(defel);
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else if (pg_strcasecmp(defel->defname, "msspace") == 0)
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mtransSpace = defGetInt32(defel);
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else if (pg_strcasecmp(defel->defname, "initcond") == 0)
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initval = defGetString(defel);
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else if (pg_strcasecmp(defel->defname, "initcond1") == 0)
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initval = defGetString(defel);
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else if (pg_strcasecmp(defel->defname, "minitcond") == 0)
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minitval = defGetString(defel);
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else
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ereport(WARNING,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("aggregate attribute \"%s\" not recognized",
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defel->defname)));
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}
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/*
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* make sure we have our required definitions
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*/
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if (transType == NULL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate stype must be specified")));
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if (transfuncName == NIL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate sfunc must be specified")));
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/*
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* if mtransType is given, mtransfuncName and minvtransfuncName must be as
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* well; if not, then none of the moving-aggregate options should have
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* been given.
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*/
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if (mtransType != NULL)
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{
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if (mtransfuncName == NIL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate msfunc must be specified when mstype is specified")));
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if (minvtransfuncName == NIL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate minvfunc must be specified when mstype is specified")));
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}
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else
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{
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if (mtransfuncName != NIL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate msfunc must not be specified without mstype")));
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if (minvtransfuncName != NIL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate minvfunc must not be specified without mstype")));
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if (mfinalfuncName != NIL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate mfinalfunc must not be specified without mstype")));
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if (mtransSpace != 0)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate msspace must not be specified without mstype")));
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if (minitval != NULL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate minitcond must not be specified without mstype")));
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}
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/*
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* look up the aggregate's input datatype(s).
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*/
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if (oldstyle)
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{
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/*
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* Old style: use basetype parameter. This supports aggregates of
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* zero or one input, with input type ANY meaning zero inputs.
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*
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* Historically we allowed the command to look like basetype = 'ANY'
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* so we must do a case-insensitive comparison for the name ANY. Ugh.
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*/
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Oid aggArgTypes[1];
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if (baseType == NULL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate input type must be specified")));
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if (pg_strcasecmp(TypeNameToString(baseType), "ANY") == 0)
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{
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numArgs = 0;
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aggArgTypes[0] = InvalidOid;
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}
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else
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{
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numArgs = 1;
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aggArgTypes[0] = typenameTypeId(NULL, baseType);
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}
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parameterTypes = buildoidvector(aggArgTypes, numArgs);
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allParameterTypes = NULL;
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parameterModes = NULL;
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parameterNames = NULL;
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parameterDefaults = NIL;
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variadicArgType = InvalidOid;
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}
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else
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{
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/*
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* New style: args is a list of FunctionParameters (possibly zero of
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* 'em). We share functioncmds.c's code for processing them.
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*/
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Oid requiredResultType;
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if (baseType != NULL)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("basetype is redundant with aggregate input type specification")));
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numArgs = list_length(args);
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interpret_function_parameter_list(args,
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InvalidOid,
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true, /* is an aggregate */
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queryString,
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¶meterTypes,
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&allParameterTypes,
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¶meterModes,
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¶meterNames,
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¶meterDefaults,
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&variadicArgType,
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&requiredResultType);
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/* Parameter defaults are not currently allowed by the grammar */
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Assert(parameterDefaults == NIL);
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/* There shouldn't have been any OUT parameters, either */
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Assert(requiredResultType == InvalidOid);
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}
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/*
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* look up the aggregate's transtype.
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*
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* transtype can't be a pseudo-type, since we need to be able to store
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* values of the transtype. However, we can allow polymorphic transtype
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* in some cases (AggregateCreate will check). Also, we allow "internal"
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* for functions that want to pass pointers to private data structures;
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* but allow that only to superusers, since you could crash the system (or
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* worse) by connecting up incompatible internal-using functions in an
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* aggregate.
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*/
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transTypeId = typenameTypeId(NULL, transType);
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transTypeType = get_typtype(transTypeId);
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if (transTypeType == TYPTYPE_PSEUDO &&
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!IsPolymorphicType(transTypeId))
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{
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if (transTypeId == INTERNALOID && superuser())
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/* okay */ ;
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else
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate transition data type cannot be %s",
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format_type_be(transTypeId))));
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}
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/*
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* If a moving-aggregate transtype is specified, look that up. Same
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* restrictions as for transtype.
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*/
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if (mtransType)
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{
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mtransTypeId = typenameTypeId(NULL, mtransType);
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mtransTypeType = get_typtype(mtransTypeId);
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if (mtransTypeType == TYPTYPE_PSEUDO &&
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!IsPolymorphicType(mtransTypeId))
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{
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if (mtransTypeId == INTERNALOID && superuser())
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/* okay */ ;
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else
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
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errmsg("aggregate transition data type cannot be %s",
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format_type_be(mtransTypeId))));
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}
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}
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/*
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* If we have an initval, and it's not for a pseudotype (particularly a
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* polymorphic type), make sure it's acceptable to the type's input
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* function. We will store the initval as text, because the input
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* function isn't necessarily immutable (consider "now" for timestamp),
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* and we want to use the runtime not creation-time interpretation of the
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* value. However, if it's an incorrect value it seems much more
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* user-friendly to complain at CREATE AGGREGATE time.
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*/
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if (initval && transTypeType != TYPTYPE_PSEUDO)
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{
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Oid typinput,
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typioparam;
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getTypeInputInfo(transTypeId, &typinput, &typioparam);
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(void) OidInputFunctionCall(typinput, initval, typioparam, -1);
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}
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/*
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* Likewise for moving-aggregate initval.
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*/
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if (minitval && mtransTypeType != TYPTYPE_PSEUDO)
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{
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Oid typinput,
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typioparam;
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getTypeInputInfo(mtransTypeId, &typinput, &typioparam);
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(void) OidInputFunctionCall(typinput, minitval, typioparam, -1);
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}
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/*
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* Most of the argument-checking is done inside of AggregateCreate
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*/
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return AggregateCreate(aggName, /* aggregate name */
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aggNamespace, /* namespace */
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aggKind,
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numArgs,
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numDirectArgs,
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parameterTypes,
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PointerGetDatum(allParameterTypes),
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PointerGetDatum(parameterModes),
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PointerGetDatum(parameterNames),
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parameterDefaults,
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variadicArgType,
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transfuncName, /* step function name */
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finalfuncName, /* final function name */
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mtransfuncName, /* fwd trans function name */
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minvtransfuncName, /* inv trans function name */
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mfinalfuncName, /* final function name */
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finalfuncExtraArgs,
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mfinalfuncExtraArgs,
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sortoperatorName, /* sort operator name */
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transTypeId, /* transition data type */
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transSpace, /* transition space */
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mtransTypeId, /* transition data type */
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mtransSpace, /* transition space */
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initval, /* initial condition */
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minitval); /* initial condition */
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}
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