/*------------------------------------------------------------------------- * * define.c * * These routines execute some of the CREATE statements. In an earlier * version of Postgres, these were "define" statements. * * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION * $Header: /cvsroot/pgsql/src/backend/commands/define.c,v 1.68 2002/03/06 20:34:47 momjian Exp $ * * DESCRIPTION * The "DefineFoo" routines take the parse tree and pick out the * appropriate arguments/flags, passing the results to the * corresponding "FooDefine" routines (in src/catalog) that do * the actual catalog-munging. These routines also verify permission * of the user to execute the command. * * NOTES * These things must be defined and committed in the following order: * "create function": * input/output, recv/send procedures * "create type": * type * "create operator": * operators * * Most of the parse-tree manipulation routines are defined in * commands/manip.c. * *------------------------------------------------------------------------- */ #include "postgres.h" #include <ctype.h> #include <math.h> #include "access/heapam.h" #include "catalog/catname.h" #include "catalog/heap.h" #include "catalog/pg_aggregate.h" #include "catalog/pg_language.h" #include "catalog/pg_operator.h" #include "catalog/pg_proc.h" #include "catalog/pg_type.h" #include "commands/defrem.h" #include "fmgr.h" #include "miscadmin.h" #include "optimizer/cost.h" #include "parser/parse_expr.h" #include "utils/acl.h" #include "utils/builtins.h" #include "utils/syscache.h" static char *defGetString(DefElem *def); static double defGetNumeric(DefElem *def); static int defGetTypeLength(DefElem *def); #define DEFAULT_TYPDELIM ',' /* * Translate the input language name to lower case. */ static void case_translate_language_name(const char *input, char *output) { int i; for (i = 0; i < NAMEDATALEN - 1 && input[i]; ++i) output[i] = tolower((unsigned char) input[i]); output[i] = '\0'; } static void compute_return_type(TypeName *returnType, char **prorettype_p, bool *returnsSet_p) { /* * Examine the "returns" clause returnType of the CREATE FUNCTION statement * and return information about it as *prorettype_p and *returnsSet. */ *prorettype_p = TypeNameToInternalName(returnType); *returnsSet_p = returnType->setof; } static void compute_full_attributes(List *parameters, int32 *byte_pct_p, int32 *perbyte_cpu_p, int32 *percall_cpu_p, int32 *outin_ratio_p, bool *canCache_p, bool *isStrict_p) { /*------------- * Interpret the parameters *parameters and return their contents as * *byte_pct_p, etc. * * These parameters supply optional information about a function. * All have defaults if not specified. * * Note: currently, only two of these parameters actually do anything: * * * canCache means the optimizer's constant-folder is allowed to * pre-evaluate the function when all its inputs are constants. * * * isStrict means the function should not be called when any NULL * inputs are present; instead a NULL result value should be assumed. * * The other four parameters are not used anywhere. They used to be * used in the "expensive functions" optimizer, but that's been dead code * for a long time. * * Since canCache and isStrict are useful for any function, we now allow * attributes to be supplied for all functions regardless of language. *------------ */ List *pl; /* the defaults */ *byte_pct_p = BYTE_PCT; *perbyte_cpu_p = PERBYTE_CPU; *percall_cpu_p = PERCALL_CPU; *outin_ratio_p = OUTIN_RATIO; *canCache_p = false; *isStrict_p = false; foreach(pl, parameters) { DefElem *param = (DefElem *) lfirst(pl); if (strcasecmp(param->defname, "iscachable") == 0) *canCache_p = true; else if (strcasecmp(param->defname, "isstrict") == 0) *isStrict_p = true; else if (strcasecmp(param->defname, "trusted") == 0) { /* * we don't have untrusted functions any more. The 4.2 * implementation is lousy anyway so I took it out. -ay 10/94 */ elog(ERROR, "untrusted function has been decommissioned."); } else if (strcasecmp(param->defname, "byte_pct") == 0) *byte_pct_p = (int) defGetNumeric(param); else if (strcasecmp(param->defname, "perbyte_cpu") == 0) *perbyte_cpu_p = (int) defGetNumeric(param); else if (strcasecmp(param->defname, "percall_cpu") == 0) *percall_cpu_p = (int) defGetNumeric(param); else if (strcasecmp(param->defname, "outin_ratio") == 0) *outin_ratio_p = (int) defGetNumeric(param); else elog(WARNING, "Unrecognized function attribute '%s' ignored", param->defname); } } /* * For a dynamically linked C language object, the form of the clause is * * AS <object file name> [, <link symbol name> ] * * In all other cases * * AS <object reference, or sql code> * */ static void interpret_AS_clause(Oid languageOid, const char *languageName, const List *as, char **prosrc_str_p, char **probin_str_p) { Assert(as != NIL); if (languageOid == ClanguageId) { /* * For "C" language, store the file name in probin and, when * given, the link symbol name in prosrc. */ *probin_str_p = strVal(lfirst(as)); if (lnext(as) == NULL) *prosrc_str_p = "-"; else *prosrc_str_p = strVal(lsecond(as)); } else { /* Everything else wants the given string in prosrc. */ *prosrc_str_p = strVal(lfirst(as)); *probin_str_p = "-"; if (lnext(as) != NIL) elog(ERROR, "CREATE FUNCTION: only one AS item needed for %s language", languageName); } } /* * CreateFunction * Execute a CREATE FUNCTION utility statement. */ void CreateFunction(ProcedureStmt *stmt) { /* pathname of executable file that executes this function, if any */ char *probin_str; /* SQL that executes this function, if any */ char *prosrc_str; /* Type of return value (or member of set of values) from function */ char *prorettype; /* name of language of function, with case adjusted */ char languageName[NAMEDATALEN]; /* The function returns a set of values, as opposed to a singleton. */ bool returnsSet; /* * The following are optional user-supplied attributes of the * function. */ int32 byte_pct, perbyte_cpu, percall_cpu, outin_ratio; bool canCache, isStrict; HeapTuple languageTuple; Form_pg_language languageStruct; Oid languageOid; /* Convert language name to canonical case */ case_translate_language_name(stmt->language, languageName); languageTuple = SearchSysCache(LANGNAME, PointerGetDatum(languageName), 0, 0, 0); if (!HeapTupleIsValid(languageTuple)) elog(ERROR, "language \"%s\" does not exist", languageName); languageOid = languageTuple->t_data->t_oid; languageStruct = (Form_pg_language) GETSTRUCT(languageTuple); if (!((languageStruct->lanpltrusted && pg_language_aclcheck(languageOid, GetUserId()) == ACLCHECK_OK) || superuser())) elog(ERROR, "permission denied"); ReleaseSysCache(languageTuple); /* * Convert remaining parameters of CREATE to form wanted by * ProcedureCreate. */ Assert(IsA(stmt->returnType, TypeName)); compute_return_type((TypeName *) stmt->returnType, &prorettype, &returnsSet); compute_full_attributes(stmt->withClause, &byte_pct, &perbyte_cpu, &percall_cpu, &outin_ratio, &canCache, &isStrict); interpret_AS_clause(languageOid, languageName, stmt->as, &prosrc_str, &probin_str); /* * And now that we have all the parameters, and know we're permitted * to do so, go ahead and create the function. */ ProcedureCreate(stmt->funcname, stmt->replace, returnsSet, prorettype, languageOid, prosrc_str, /* converted to text later */ probin_str, /* converted to text later */ true, /* (obsolete "trusted") */ canCache, isStrict, byte_pct, perbyte_cpu, percall_cpu, outin_ratio, stmt->argTypes); } /* -------------------------------- * DefineOperator * * this function extracts all the information from the * parameter list generated by the parser and then has * OperatorCreate() do all the actual work. * * 'parameters' is a list of DefElem * -------------------------------- */ void DefineOperator(char *oprName, List *parameters) { uint16 precedence = 0; /* operator precedence */ bool canHash = false; /* operator hashes */ bool isLeftAssociative = true; /* operator is left * associative */ char *functionName = NULL; /* function for operator */ char *typeName1 = NULL; /* first type name */ char *typeName2 = NULL; /* second type name */ char *commutatorName = NULL; /* optional commutator operator * name */ char *negatorName = NULL; /* optional negator operator name */ char *restrictionName = NULL; /* optional restrict. sel. * procedure */ char *joinName = NULL; /* optional join sel. procedure name */ char *sortName1 = NULL; /* optional first sort operator */ char *sortName2 = NULL; /* optional second sort operator */ List *pl; /* * loop over the definition list and extract the information we need. */ foreach(pl, parameters) { DefElem *defel = (DefElem *) lfirst(pl); if (strcasecmp(defel->defname, "leftarg") == 0) { typeName1 = defGetString(defel); if (IsA(defel->arg, TypeName) && ((TypeName *) defel->arg)->setof) elog(ERROR, "setof type not implemented for leftarg"); } else if (strcasecmp(defel->defname, "rightarg") == 0) { typeName2 = defGetString(defel); if (IsA(defel->arg, TypeName) && ((TypeName *) defel->arg)->setof) elog(ERROR, "setof type not implemented for rightarg"); } else if (strcasecmp(defel->defname, "procedure") == 0) functionName = defGetString(defel); else if (strcasecmp(defel->defname, "precedence") == 0) { /* NOT IMPLEMENTED (never worked in v4.2) */ elog(NOTICE, "CREATE OPERATOR: precedence not implemented"); } else if (strcasecmp(defel->defname, "associativity") == 0) { /* NOT IMPLEMENTED (never worked in v4.2) */ elog(NOTICE, "CREATE OPERATOR: associativity not implemented"); } else if (strcasecmp(defel->defname, "commutator") == 0) commutatorName = defGetString(defel); else if (strcasecmp(defel->defname, "negator") == 0) negatorName = defGetString(defel); else if (strcasecmp(defel->defname, "restrict") == 0) restrictionName = defGetString(defel); else if (strcasecmp(defel->defname, "join") == 0) joinName = defGetString(defel); else if (strcasecmp(defel->defname, "hashes") == 0) canHash = TRUE; else if (strcasecmp(defel->defname, "sort1") == 0) { /* ---------------- * XXX ( ... [ , sort1 = oprname ] [ , sort2 = oprname ] ... ) * XXX is undocumented in the reference manual source as of * 89/8/22. * ---------------- */ sortName1 = defGetString(defel); } else if (strcasecmp(defel->defname, "sort2") == 0) sortName2 = defGetString(defel); else { elog(WARNING, "DefineOperator: attribute \"%s\" not recognized", defel->defname); } } /* * make sure we have our required definitions */ if (functionName == NULL) elog(ERROR, "Define: \"procedure\" unspecified"); /* * now have OperatorCreate do all the work.. */ OperatorCreate(oprName, /* operator name */ typeName1, /* first type name */ typeName2, /* second type name */ functionName, /* function for operator */ precedence, /* operator precedence */ isLeftAssociative, /* operator is left associative */ commutatorName, /* optional commutator operator * name */ negatorName, /* optional negator operator name */ restrictionName, /* optional restrict. sel. * procedure */ joinName, /* optional join sel. procedure name */ canHash, /* operator hashes */ sortName1, /* optional first sort operator */ sortName2); /* optional second sort operator */ } /* ------------------- * DefineAggregate * ------------------ */ void DefineAggregate(char *aggName, List *parameters) { char *transfuncName = NULL; char *finalfuncName = NULL; char *baseType = NULL; char *transType = NULL; char *initval = NULL; List *pl; foreach(pl, parameters) { DefElem *defel = (DefElem *) lfirst(pl); /* * sfunc1, stype1, and initcond1 are accepted as obsolete * spellings for sfunc, stype, initcond. */ if (strcasecmp(defel->defname, "sfunc") == 0) transfuncName = defGetString(defel); else if (strcasecmp(defel->defname, "sfunc1") == 0) transfuncName = defGetString(defel); else if (strcasecmp(defel->defname, "finalfunc") == 0) finalfuncName = defGetString(defel); else if (strcasecmp(defel->defname, "basetype") == 0) baseType = defGetString(defel); else if (strcasecmp(defel->defname, "stype") == 0) transType = defGetString(defel); else if (strcasecmp(defel->defname, "stype1") == 0) transType = defGetString(defel); else if (strcasecmp(defel->defname, "initcond") == 0) initval = defGetString(defel); else if (strcasecmp(defel->defname, "initcond1") == 0) initval = defGetString(defel); else elog(WARNING, "DefineAggregate: attribute \"%s\" not recognized", defel->defname); } /* * make sure we have our required definitions */ if (baseType == NULL) elog(ERROR, "Define: \"basetype\" unspecified"); if (transType == NULL) elog(ERROR, "Define: \"stype\" unspecified"); if (transfuncName == NULL) elog(ERROR, "Define: \"sfunc\" unspecified"); /* * Most of the argument-checking is done inside of AggregateCreate */ AggregateCreate(aggName, /* aggregate name */ transfuncName, /* step function name */ finalfuncName, /* final function name */ baseType, /* type of data being aggregated */ transType, /* transition data type */ initval); /* initial condition */ } /* * DefineDomain * Registers a new domain. */ void DefineDomain(CreateDomainStmt *stmt) { int16 internalLength = -1; /* int2 */ int16 externalLength = -1; /* int2 */ char *inputName = NULL; char *outputName = NULL; char *sendName = NULL; char *receiveName = NULL; /* * Domains store the external representation in defaultValue * and the interal Node representation in defaultValueBin */ char *defaultValue = NULL; char *defaultValueBin = NULL; bool byValue = false; char delimiter = DEFAULT_TYPDELIM; char alignment = 'i'; /* default alignment */ char storage = 'p'; /* default TOAST storage method */ char typtype; Datum datum; bool typNotNull = false; char *elemName = NULL; int32 typNDims = 0; /* No array dimensions by default */ bool isnull; Relation pg_type_rel; TupleDesc pg_type_dsc; HeapTuple typeTup; char *typeName = stmt->typename->name; List *listptr; List *schema = stmt->constraints; /* * Domainnames, unlike typenames don't need to account for the '_' * prefix. So they can be one character longer. */ if (strlen(stmt->domainname) > (NAMEDATALEN - 1)) elog(ERROR, "CREATE DOMAIN: domain names must be %d characters or less", NAMEDATALEN - 1); /* Test for existing Domain (or type) of that name */ typeTup = SearchSysCache( TYPENAME , PointerGetDatum(stmt->domainname) , 0, 0, 0 ); if (HeapTupleIsValid(typeTup)) { elog(ERROR, "CREATE DOMAIN: domain or type %s already exists", stmt->domainname); } /* * Get the information about old types */ pg_type_rel = heap_openr(TypeRelationName, RowExclusiveLock); pg_type_dsc = RelationGetDescr(pg_type_rel); /* * When the type is an array for some reason we don't actually receive * the name here. We receive the base types name. Lets set Dims while * were at it. */ if (stmt->typename->arrayBounds > 0) { typeName = makeArrayTypeName(stmt->typename->name); typNDims = length(stmt->typename->arrayBounds); } typeTup = SearchSysCache( TYPENAME , PointerGetDatum(typeName) , 0, 0, 0 ); if (!HeapTupleIsValid(typeTup)) { elog(ERROR, "CREATE DOMAIN: type %s does not exist", stmt->typename->name); } /* Check that this is a basetype */ typtype = DatumGetChar(heap_getattr(typeTup, Anum_pg_type_typtype, pg_type_dsc, &isnull)); Assert(!isnull); /* * What we really don't want is domains of domains. This could cause all sorts * of neat issues if we allow that. * * With testing, we may determine complex types should be allowed */ if (typtype != 'b') { elog(ERROR, "DefineDomain: %s is not a basetype", stmt->typename->name); } /* passed by value */ byValue = DatumGetBool(heap_getattr(typeTup, Anum_pg_type_typbyval, pg_type_dsc, &isnull)); Assert(!isnull); /* Required Alignment */ alignment = DatumGetChar(heap_getattr(typeTup, Anum_pg_type_typalign, pg_type_dsc, &isnull)); Assert(!isnull); /* Storage Length */ internalLength = DatumGetInt16(heap_getattr(typeTup, Anum_pg_type_typlen, pg_type_dsc, &isnull)); Assert(!isnull); /* External Length (unused) */ externalLength = DatumGetInt16(heap_getattr(typeTup, Anum_pg_type_typprtlen, pg_type_dsc, &isnull)); Assert(!isnull); /* Array element Delimiter */ delimiter = DatumGetChar(heap_getattr(typeTup, Anum_pg_type_typdelim, pg_type_dsc, &isnull)); Assert(!isnull); /* Input Function Name */ datum = heap_getattr(typeTup, Anum_pg_type_typinput, pg_type_dsc, &isnull); Assert(!isnull); inputName = DatumGetCString(DirectFunctionCall1(regprocout, datum)); /* Output Function Name */ datum = heap_getattr(typeTup, Anum_pg_type_typoutput, pg_type_dsc, &isnull); Assert(!isnull); outputName = DatumGetCString(DirectFunctionCall1(regprocout, datum)); /* ReceiveName */ datum = heap_getattr(typeTup, Anum_pg_type_typreceive, pg_type_dsc, &isnull); Assert(!isnull); receiveName = DatumGetCString(DirectFunctionCall1(regprocout, datum)); /* SendName */ datum = heap_getattr(typeTup, Anum_pg_type_typsend, pg_type_dsc, &isnull); Assert(!isnull); sendName = DatumGetCString(DirectFunctionCall1(regprocout, datum)); /* TOAST Strategy */ storage = DatumGetChar(heap_getattr(typeTup, Anum_pg_type_typstorage, pg_type_dsc, &isnull)); Assert(!isnull); /* Inherited default value */ datum = heap_getattr(typeTup, Anum_pg_type_typdefault, pg_type_dsc, &isnull); if (!isnull) { defaultValue = DatumGetCString(DirectFunctionCall1(textout, datum)); } /* * Pull out the typelem name of the parent OID. * * This is what enables us to make a domain of an array */ datum = heap_getattr(typeTup, Anum_pg_type_typelem, pg_type_dsc, &isnull); Assert(!isnull); if (DatumGetObjectId(datum) != InvalidOid) { HeapTuple tup; tup = SearchSysCache( TYPEOID , datum , 0, 0, 0 ); elemName = NameStr(((Form_pg_type) GETSTRUCT(tup))->typname); ReleaseSysCache(tup); } /* * Run through constraints manually avoids the additional * processing conducted by DefineRelation() and friends. * * Besides, we don't want any constraints to be cooked. We'll * do that when the table is created via MergeDomainAttributes(). */ foreach(listptr, schema) { bool nullDefined = false; Node *expr; Constraint *colDef = lfirst(listptr); /* Used for the statement transformation */ ParseState *pstate; /* * Create a dummy ParseState and insert the target relation as its * sole rangetable entry. We need a ParseState for transformExpr. */ pstate = make_parsestate(NULL); switch(colDef->contype) { /* * The inherited default value may be overridden by the user * with the DEFAULT <expr> statement. * * We have to search the entire constraint tree returned as we * don't want to cook or fiddle too much. */ case CONSTR_DEFAULT: /* * Cook the colDef->raw_expr into an expression to ensure * that it can be done. We store the text version of the * raw value. * * Note: Name is strictly for error message */ expr = cookDefault(pstate, colDef->raw_expr , typeTup->t_data->t_oid , stmt->typename->typmod , stmt->typename->name); /* Binary default required */ defaultValue = deparse_expression(expr, deparse_context_for(stmt->domainname, InvalidOid), false); defaultValueBin = nodeToString(expr); break; /* * Find the NULL constraint. */ case CONSTR_NOTNULL: if (nullDefined) { elog(ERROR, "CREATE DOMAIN has conflicting NULL / NOT NULL constraint"); } else { typNotNull = true; nullDefined = true; } break; case CONSTR_NULL: if (nullDefined) { elog(ERROR, "CREATE DOMAIN has conflicting NULL / NOT NULL constraint"); } else { typNotNull = false; nullDefined = true; } break; case CONSTR_UNIQUE: elog(ERROR, "CREATE DOMAIN / UNIQUE indecies not supported"); break; case CONSTR_PRIMARY: elog(ERROR, "CREATE DOMAIN / PRIMARY KEY indecies not supported"); break; case CONSTR_CHECK: elog(ERROR, "defineDomain: CHECK Constraints not supported"); break; case CONSTR_ATTR_DEFERRABLE: case CONSTR_ATTR_NOT_DEFERRABLE: case CONSTR_ATTR_DEFERRED: case CONSTR_ATTR_IMMEDIATE: elog(ERROR, "defineDomain: DEFERRABLE, NON DEFERRABLE, DEFERRED and IMMEDIATE not supported"); break; } } /* * Have TypeCreate do all the real work. */ TypeCreate(stmt->domainname, /* type name */ InvalidOid, /* preassigned type oid (not done here) */ InvalidOid, /* relation oid (n/a here) */ internalLength, /* internal size */ externalLength, /* external size */ 'd', /* type-type (domain type) */ delimiter, /* array element delimiter */ inputName, /* input procedure */ outputName, /* output procedure */ receiveName, /* receive procedure */ sendName, /* send procedure */ elemName, /* element type name */ typeName, /* base type name */ defaultValue, /* default type value */ defaultValueBin, /* default type value */ byValue, /* passed by value */ alignment, /* required alignment */ storage, /* TOAST strategy */ stmt->typename->typmod, /* typeMod value */ typNDims, /* Array dimensions for base type */ typNotNull); /* Type NOT NULL */ /* * Now we can clean up. */ ReleaseSysCache(typeTup); heap_close(pg_type_rel, NoLock); } /* * DefineType * Registers a new type. */ void DefineType(char *typeName, List *parameters) { int16 internalLength = -1; /* int2 */ int16 externalLength = -1; /* int2 */ char *elemName = NULL; char *inputName = NULL; char *outputName = NULL; char *sendName = NULL; char *receiveName = NULL; char *defaultValue = NULL; char *defaultValueBin = NULL; Node *defaultRaw = (Node *) NULL; bool byValue = false; char delimiter = DEFAULT_TYPDELIM; char *shadow_type; List *pl; char alignment = 'i'; /* default alignment */ char storage = 'p'; /* default TOAST storage method */ /* * Type names must be one character shorter than other names, allowing * room to create the corresponding array type name with prepended * "_". */ if (strlen(typeName) > (NAMEDATALEN - 2)) elog(ERROR, "DefineType: type names must be %d characters or less", NAMEDATALEN - 2); foreach(pl, parameters) { DefElem *defel = (DefElem *) lfirst(pl); if (strcasecmp(defel->defname, "internallength") == 0) internalLength = defGetTypeLength(defel); else if (strcasecmp(defel->defname, "externallength") == 0) externalLength = defGetTypeLength(defel); else if (strcasecmp(defel->defname, "input") == 0) inputName = defGetString(defel); else if (strcasecmp(defel->defname, "output") == 0) outputName = defGetString(defel); else if (strcasecmp(defel->defname, "send") == 0) sendName = defGetString(defel); else if (strcasecmp(defel->defname, "delimiter") == 0) { char *p = defGetString(defel); delimiter = p[0]; } else if (strcasecmp(defel->defname, "receive") == 0) receiveName = defGetString(defel); else if (strcasecmp(defel->defname, "element") == 0) elemName = defGetString(defel); else if (strcasecmp(defel->defname, "default") == 0) defaultRaw = defel->arg; else if (strcasecmp(defel->defname, "passedbyvalue") == 0) byValue = true; else if (strcasecmp(defel->defname, "alignment") == 0) { char *a = defGetString(defel); /* * Note: if argument was an unquoted identifier, parser will * have applied xlateSqlType() to it, so be prepared to * recognize translated type names as well as the nominal * form. */ if (strcasecmp(a, "double") == 0) alignment = 'd'; else if (strcasecmp(a, "float8") == 0) alignment = 'd'; else if (strcasecmp(a, "int4") == 0) alignment = 'i'; else if (strcasecmp(a, "int2") == 0) alignment = 's'; else if (strcasecmp(a, "char") == 0) alignment = 'c'; else if (strcasecmp(a, "bpchar") == 0) alignment = 'c'; else elog(ERROR, "DefineType: \"%s\" alignment not recognized", a); } else if (strcasecmp(defel->defname, "storage") == 0) { char *a = defGetString(defel); if (strcasecmp(a, "plain") == 0) storage = 'p'; else if (strcasecmp(a, "external") == 0) storage = 'e'; else if (strcasecmp(a, "extended") == 0) storage = 'x'; else if (strcasecmp(a, "main") == 0) storage = 'm'; else elog(ERROR, "DefineType: \"%s\" storage not recognized", a); } else { elog(WARNING, "DefineType: attribute \"%s\" not recognized", defel->defname); } } /* * make sure we have our required definitions */ if (inputName == NULL) elog(ERROR, "Define: \"input\" unspecified"); if (outputName == NULL) elog(ERROR, "Define: \"output\" unspecified"); if (defaultRaw) { Node *expr; ParseState *pstate; /* * Create a dummy ParseState and insert the target relation as its * sole rangetable entry. We need a ParseState for transformExpr. */ pstate = make_parsestate(NULL); expr = cookDefault(pstate, defaultRaw, InvalidOid, -1, typeName); /* Binary default required */ defaultValue = deparse_expression(expr, deparse_context_for(typeName, InvalidOid), false); defaultValueBin = nodeToString(expr); } /* * now have TypeCreate do all the real work. */ TypeCreate(typeName, /* type name */ InvalidOid, /* preassigned type oid (not done here) */ InvalidOid, /* relation oid (n/a here) */ internalLength, /* internal size */ externalLength, /* external size */ 'b', /* type-type (base type) */ delimiter, /* array element delimiter */ inputName, /* input procedure */ outputName, /* output procedure */ receiveName, /* receive procedure */ sendName, /* send procedure */ elemName, /* element type name */ NULL, /* base type name (Non-zero for domains) */ defaultValue, /* default type value */ defaultValueBin, /* default type value (Binary form) */ byValue, /* passed by value */ alignment, /* required alignment */ storage, /* TOAST strategy */ -1, /* typMod (Domains only) */ 0, /* Array Dimensions of typbasetype */ 'f'); /* Type NOT NULL */ /* * When we create a base type (as opposed to a complex type) we need * to have an array entry for it in pg_type as well. */ shadow_type = makeArrayTypeName(typeName); /* alignment must be 'i' or 'd' for arrays */ alignment = (alignment == 'd') ? 'd' : 'i'; TypeCreate(shadow_type, /* type name */ InvalidOid, /* preassigned type oid (not done here) */ InvalidOid, /* relation oid (n/a here) */ -1, /* internal size */ -1, /* external size */ 'b', /* type-type (base type) */ DEFAULT_TYPDELIM, /* array element delimiter */ "array_in", /* input procedure */ "array_out", /* output procedure */ "array_in", /* receive procedure */ "array_out", /* send procedure */ typeName, /* element type name */ NULL, /* base type name */ NULL, /* never a default type value */ NULL, /* binary default isn't sent either */ false, /* never passed by value */ alignment, /* see above */ 'x', /* ARRAY is always toastable */ -1, /* typMod (Domains only) */ 0, /* Array dimensions of typbasetype */ 'f'); /* Type NOT NULL */ pfree(shadow_type); } static char * defGetString(DefElem *def) { if (def->arg == NULL) elog(ERROR, "Define: \"%s\" requires a parameter", def->defname); switch (nodeTag(def->arg)) { case T_Integer: { char *str = palloc(32); snprintf(str, 32, "%ld", (long) intVal(def->arg)); return str; } case T_Float: /* * T_Float values are kept in string form, so this type cheat * works (and doesn't risk losing precision) */ return strVal(def->arg); case T_String: return strVal(def->arg); case T_TypeName: return TypeNameToInternalName((TypeName *) def->arg); default: elog(ERROR, "Define: cannot interpret argument of \"%s\"", def->defname); } return NULL; /* keep compiler quiet */ } static double defGetNumeric(DefElem *def) { if (def->arg == NULL) elog(ERROR, "Define: \"%s\" requires a numeric value", def->defname); switch (nodeTag(def->arg)) { case T_Integer: return (double) intVal(def->arg); case T_Float: return floatVal(def->arg); default: elog(ERROR, "Define: \"%s\" requires a numeric value", def->defname); } return 0; /* keep compiler quiet */ } static int defGetTypeLength(DefElem *def) { if (def->arg == NULL) elog(ERROR, "Define: \"%s\" requires a parameter", def->defname); switch (nodeTag(def->arg)) { case T_Integer: return intVal(def->arg); case T_Float: elog(ERROR, "Define: \"%s\" requires an integral value", def->defname); break; case T_String: if (strcasecmp(strVal(def->arg), "variable") == 0) return -1; /* variable length */ break; case T_TypeName: /* cope if grammar chooses to believe "variable" is a typename */ if (strcasecmp(TypeNameToInternalName((TypeName *) def->arg), "variable") == 0) return -1; /* variable length */ break; default: elog(ERROR, "Define: cannot interpret argument of \"%s\"", def->defname); } elog(ERROR, "Define: invalid argument for \"%s\"", def->defname); return 0; /* keep compiler quiet */ }