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Copy pathSPI.c
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212 lines (191 loc) · 4.63 KB
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/*
* Copyright (c) 2004, 2005, 2006 TADA AB - Taby Sweden
* Distributed under the terms shown in the file COPYRIGHT
* found in the root folder of this project or at
* http://eng.tada.se/osprojects/COPYRIGHT.html
*
* @author Thomas Hallgren
*/
#include "org_postgresql_pljava_internal_SPI.h"
#include "pljava/backports.h"
#include "pljava/SPI.h"
#include "pljava/Invocation.h"
#include "pljava/Exception.h"
#include "pljava/type/String.h"
#include "pljava/type/TupleTable.h"
#include <access/xact.h>
Savepoint* infant = 0;
extern void SPI_initialize(void);
void SPI_initialize(void)
{
JNINativeMethod methods[] = {
{
"_exec",
"(JLjava/lang/String;I)I",
Java_org_postgresql_pljava_internal_SPI__1exec
},
{
"_getProcessed",
"()I",
Java_org_postgresql_pljava_internal_SPI__1getProcessed
},
{
"_getResult",
"()I",
Java_org_postgresql_pljava_internal_SPI__1getResult
},
{
"_getTupTable",
"(Lorg/postgresql/pljava/internal/TupleDesc;)Lorg/postgresql/pljava/internal/TupleTable;",
Java_org_postgresql_pljava_internal_SPI__1getTupTable
},
{
"_freeTupTable",
"()V",
Java_org_postgresql_pljava_internal_SPI__1freeTupTable
},
{ 0, 0, 0 }};
PgObject_registerNatives("org/postgresql/pljava/internal/SPI", methods);
}
/****************************************
* JNI methods
****************************************/
/*
* Class: org_postgresql_pljava_internal_SPI
* Method: _exec
* Signature: (JLjava/lang/String;I)I
*/
JNIEXPORT jint JNICALL
Java_org_postgresql_pljava_internal_SPI__1exec(JNIEnv* env, jclass cls, jlong threadId, jstring cmd, jint count)
{
jint result = 0;
BEGIN_NATIVE
char* command = String_createNTS(cmd);
if(command != 0)
{
STACK_BASE_VARS
STACK_BASE_PUSH(threadId)
PG_TRY();
{
Invocation_assertConnect();
result = (jint)SPI_exec(command, (int)count);
if(result < 0)
Exception_throwSPI("exec", result);
}
PG_CATCH();
{
Exception_throw_ERROR("SPI_exec");
}
PG_END_TRY();
pfree(command);
STACK_BASE_POP()
}
END_NATIVE
return result;
}
/*
* Class: org_postgresql_pljava_internal_SPI
* Method: _getProcessed
* Signature: ()I
*/
JNIEXPORT jint JNICALL
Java_org_postgresql_pljava_internal_SPI__1getProcessed(JNIEnv* env, jclass cls)
{
return (jint)SPI_processed;
}
/*
* Class: org_postgresql_pljava_internal_SPI
* Method: _getResult
* Signature: ()I
*/
JNIEXPORT jint JNICALL
Java_org_postgresql_pljava_internal_SPI__1getResult(JNIEnv* env, jclass cls)
{
return (jint)SPI_result;
}
/*
* Class: org_postgresql_pljava_internal_SPI
* Method: _getTupTable
* Signature: (Lorg/postgresql/pljava/internal/TupleDesc;)Lorg/postgresql/pljava/internal/TupleTable;
*/
JNIEXPORT jobject JNICALL
Java_org_postgresql_pljava_internal_SPI__1getTupTable(JNIEnv* env, jclass cls, jobject td)
{
jobject tupleTable = 0;
if(SPI_tuptable != 0)
{
BEGIN_NATIVE
tupleTable = TupleTable_create(SPI_tuptable, td);
END_NATIVE
}
return tupleTable;
}
/*
* Class: org_postgresql_pljava_internal_SPI
* Method: _freeTupTable
* Signature: ()V;
*/
JNIEXPORT void JNICALL
Java_org_postgresql_pljava_internal_SPI__1freeTupTable(JNIEnv* env, jclass cls)
{
if(SPI_tuptable != 0)
{
BEGIN_NATIVE
SPI_freetuptable(SPI_tuptable);
SPI_tuptable = 0;
END_NATIVE
}
}
static void assertXid(SubTransactionId xid)
{
if(xid != GetCurrentSubTransactionId())
{
/* Oops. Rollback to top level transaction.
*/
ereport(ERROR, (
errcode(ERRCODE_INVALID_TRANSACTION_TERMINATION),
errmsg("Subtransaction mismatch at txlevel %d",
GetCurrentTransactionNestLevel())));
}
}
Savepoint* SPI_setSavepoint(const char* name)
{
Savepoint* sp = (Savepoint*)palloc(sizeof(Savepoint) + strlen(name));
Invocation_assertConnect();
sp->nestingLevel = GetCurrentTransactionNestLevel() + 1;
strcpy(sp->name, name);
infant = sp;
BeginInternalSubTransaction(sp->name);
infant = 0;
sp->xid = GetCurrentSubTransactionId();
return sp;
}
void SPI_releaseSavepoint(Savepoint* sp)
{
while(sp->nestingLevel < GetCurrentTransactionNestLevel())
ReleaseCurrentSubTransaction();
if(sp->nestingLevel == GetCurrentTransactionNestLevel())
{
assertXid(sp->xid);
ReleaseCurrentSubTransaction();
}
pfree(sp);
}
void SPI_rollbackSavepoint(Savepoint* sp)
{
while(sp->nestingLevel < GetCurrentTransactionNestLevel())
RollbackAndReleaseCurrentSubTransaction();
if(sp->nestingLevel == GetCurrentTransactionNestLevel())
{
assertXid(sp->xid);
RollbackAndReleaseCurrentSubTransaction();
}
SPI_restore_connection();
pfree(sp);
}
#if (PGSQL_MAJOR_VER == 8 && PGSQL_MINOR_VER < 1)
char* SPI_getnspname(Relation rel)
{
return get_namespace_name(RelationGetNamespace(rel));
}
#endif