/*
* The contents of this file are subject to the Initial
* Developer's Public License Version 1.0 (the "License");
* you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
*
* Software distributed under the License is distributed AS IS,
* WITHOUT WARRANTY OF ANY KIND, either express or implied.
* See the License for the specific language governing rights
* and limitations under the License.
*
* The Original Code was created by Adriano dos Santos Fernandes
* for the Firebird Open Source RDBMS project.
*
* Copyright (c) 2008 Adriano dos Santos Fernandes <adrianosf@gmail.com>
* and all contributors signed below.
*
* All Rights Reserved.
* Contributor(s): ______________________________________.
*/
#include "UdrCppExample.h"
using namespace Firebird;
//------------------------------------------------------------------------------
/***
Sample usage:
create database 'c:\temp\replica.fdb';
create table persons (
id integer not null,
name varchar(60) not null,
address varchar(60),
info blob sub_type text
);
commit;
create database 'c:\temp\main.fdb';
create table persons (
id integer not null,
name varchar(60) not null,
address varchar(60),
info blob sub_type text
);
create table replicate_config (
name varchar(31) not null,
data_source varchar(255) not null
);
insert into replicate_config (name, data_source)
values ('ds1', 'c:\temp\replica.fdb');
create trigger persons_replicate
after insert on persons
external name 'udrcpp_example!replicate!ds1'
engine udr;
create trigger persons_replicate2
after insert on persons
external name 'udrcpp_example!replicate_persons!ds1'
engine udr;
***/
FB_UDR_BEGIN_TRIGGER(replicate)
// Without FieldsMessage definition, messages will be byte-based.
FB_UDR_CONSTRUCTOR
, triggerMetadata(metadata->getTriggerMetadata(status))
{
ISC_STATUS_ARRAY statusVector = {0};
isc_db_handle dbHandle = Helper::getIscDbHandle(status, context);
isc_tr_handle trHandle = Helper::getIscTrHandle(status, context);
isc_stmt_handle stmtHandle = 0;
FbException::check(isc_dsql_allocate_statement(
statusVector, &dbHandle, &stmtHandle), status, statusVector);
FbException::check(isc_dsql_prepare(statusVector, &trHandle, &stmtHandle, 0,
"select data_source from replicate_config where name = ?",
SQL_DIALECT_CURRENT, NULL), status, statusVector);
const char* table = metadata->getTriggerTable(status);
// Skip the first exclamation point, separating the module name and entry point.
const char* info = strchr(metadata->getEntryPoint(status), '!');
// Skip the second exclamation point, separating the entry point and the misc info (config).
if (info)
info = strchr(info + 1, '!');
if (info)
++info;
else
info = "";
XSQLDA* inSqlDa = reinterpret_cast<XSQLDA*>(new char[(XSQLDA_LENGTH(1))]);
inSqlDa->version = SQLDA_VERSION1;
inSqlDa->sqln = 1;
FbException::check(isc_dsql_describe_bind(statusVector, &stmtHandle,
SQL_DIALECT_CURRENT, inSqlDa), status, statusVector);
inSqlDa->sqlvar[0].sqldata = new char[sizeof(short) + inSqlDa->sqlvar[0].sqllen];
strncpy(inSqlDa->sqlvar[0].sqldata + sizeof(short), info, inSqlDa->sqlvar[0].sqllen);
*reinterpret_cast<short*>(inSqlDa->sqlvar[0].sqldata) = strlen(info);
XSQLDA* outSqlDa = reinterpret_cast<XSQLDA*>(new char[(XSQLDA_LENGTH(1))]);
outSqlDa->version = SQLDA_VERSION1;
outSqlDa->sqln = 1;
FbException::check(isc_dsql_describe(statusVector, &stmtHandle,
SQL_DIALECT_CURRENT, outSqlDa), status, statusVector);
outSqlDa->sqlvar[0].sqldata = new char[sizeof(short) + outSqlDa->sqlvar[0].sqllen + 1];
outSqlDa->sqlvar[0].sqldata[sizeof(short) + outSqlDa->sqlvar[0].sqllen] = '\0';
FbException::check(isc_dsql_execute2(statusVector, &trHandle, &stmtHandle,
SQL_DIALECT_CURRENT, inSqlDa, outSqlDa), status, statusVector);
FbException::check(isc_dsql_free_statement(
statusVector, &stmtHandle, DSQL_unprepare), status, statusVector);
delete [] inSqlDa->sqlvar[0].sqldata;
delete [] reinterpret_cast<char*>(inSqlDa);
unsigned count = triggerMetadata->getCount(status);
char buffer[65536];
strcpy(buffer, "execute block (\n");
for (unsigned i = 0; i < count; ++i)
{
if (i > 0)
strcat(buffer, ",\n");
const char* name = triggerMetadata->getField(status, i);
strcat(buffer, " p");
sprintf(buffer + strlen(buffer), "%d type of column \"%s\".\"%s\" = ?", i, table, name);
}
strcat(buffer,
")\n"
"as\n"
"begin\n"
" execute statement ('insert into \"");
strcat(buffer, table);
strcat(buffer, "\" (");
for (unsigned i = 0; i < count; ++i)
{
if (i > 0)
strcat(buffer, ", ");
const char* name = triggerMetadata->getField(status, i);
strcat(buffer, "\"");
strcat(buffer, name);
strcat(buffer, "\"");
}
strcat(buffer, ") values (");
for (unsigned i = 0; i < count; ++i)
{
if (i > 0)
strcat(buffer, ", ");
strcat(buffer, "?");
}
strcat(buffer, ")') (");
for (unsigned i = 0; i < count; ++i)
{
if (i > 0)
strcat(buffer, ", ");
strcat(buffer, ":p");
sprintf(buffer + strlen(buffer), "%d", i);
}
strcat(buffer, ")\n on external data source '");
strcat(buffer, outSqlDa->sqlvar[0].sqldata + sizeof(short));
strcat(buffer, "';\nend");
AutoRelease<IAttachment> attachment(context->getAttachment(status));
AutoRelease<ITransaction> transaction(context->getTransaction(status));
stmt.reset(attachment->prepare(status, transaction, 0, buffer, SQL_DIALECT_CURRENT, 0));
delete [] outSqlDa->sqlvar[0].sqldata;
delete [] reinterpret_cast<char*>(outSqlDa);
}
/***
FB_UDR_DESTRUCTOR
{
}
***/
FB_UDR_EXECUTE_TRIGGER
{
AutoRelease<ITransaction> transaction(context->getTransaction(status));
// This will not work if the table has computed fields.
stmt->execute(status, transaction, triggerMetadata, newFields, NULL, NULL);
}
AutoRelease<IMessageMetadata> triggerMetadata;
AutoRelease<IStatement> stmt;
FB_UDR_END_TRIGGER
FB_UDR_BEGIN_TRIGGER(replicate_persons)
// Order of fields does not need to match the fields order in the table, but it should match
// the order of fields in the SQL command constructed in the initialization.
FB_UDR_TRIGGER_MESSAGE(FieldsMessage,
(FB_INTEGER, id, "ID")
(FB_BLOB, info, "INFO")
///(FB_VARCHAR(60 * 4), address, "ADDRESS")
(FB_VARCHAR(60 * 4), name, "NAME")
);
FB_UDR_CONSTRUCTOR
, triggerMetadata(metadata->getTriggerMetadata(status))
{
ISC_STATUS_ARRAY statusVector = {0};
isc_db_handle dbHandle = Helper::getIscDbHandle(status, context);
isc_tr_handle trHandle = Helper::getIscTrHandle(status, context);
isc_stmt_handle stmtHandle = 0;
FbException::check(isc_dsql_allocate_statement(
statusVector, &dbHandle, &stmtHandle), status, statusVector);
FbException::check(isc_dsql_prepare(statusVector, &trHandle, &stmtHandle, 0,
"select data_source from replicate_config where name = ?",
SQL_DIALECT_CURRENT, NULL), status, statusVector);
const char* table = metadata->getTriggerTable(status);
// Skip the first exclamation point, separating the module name and entry point.
const char* info = strchr(metadata->getEntryPoint(status), '!');
// Skip the second exclamation point, separating the entry point and the misc info (config).
if (info)
info = strchr(info + 1, '!');
if (info)
++info;
else
info = "";
XSQLDA* inSqlDa = reinterpret_cast<XSQLDA*>(new char[(XSQLDA_LENGTH(1))]);
inSqlDa->version = SQLDA_VERSION1;
inSqlDa->sqln = 1;
FbException::check(isc_dsql_describe_bind(
statusVector, &stmtHandle, SQL_DIALECT_CURRENT, inSqlDa), status, statusVector);
inSqlDa->sqlvar[0].sqldata = new char[sizeof(short) + inSqlDa->sqlvar[0].sqllen];
strncpy(inSqlDa->sqlvar[0].sqldata + sizeof(short), info, inSqlDa->sqlvar[0].sqllen);
*reinterpret_cast<short*>(inSqlDa->sqlvar[0].sqldata) = strlen(info);
XSQLDA* outSqlDa = reinterpret_cast<XSQLDA*>(new char[(XSQLDA_LENGTH(1))]);
outSqlDa->version = SQLDA_VERSION1;
outSqlDa->sqln = 1;
FbException::check(isc_dsql_describe(
statusVector, &stmtHandle, SQL_DIALECT_CURRENT, outSqlDa), status, statusVector);
outSqlDa->sqlvar[0].sqldata = new char[sizeof(short) + outSqlDa->sqlvar[0].sqllen + 1];
outSqlDa->sqlvar[0].sqldata[sizeof(short) + outSqlDa->sqlvar[0].sqllen] = '\0';
FbException::check(isc_dsql_execute2(statusVector, &trHandle, &stmtHandle,
SQL_DIALECT_CURRENT, inSqlDa, outSqlDa), status, statusVector);
FbException::check(isc_dsql_free_statement(
statusVector, &stmtHandle, DSQL_unprepare), status, statusVector);
delete [] inSqlDa->sqlvar[0].sqldata;
delete [] reinterpret_cast<char*>(inSqlDa);
char buffer[65536];
strcpy(buffer,
"execute block (\n"
" id type of column PERSONS.ID = ?,\n"
" info type of column PERSONS.INFO = ?,\n"
///" address type of column PERSONS.ADDRESS = ?,\n"
" name type of column PERSONS.NAME = ?\n"
")"
"as\n"
"begin\n"
" execute statement ('insert into persons (id, name/***, address***/, info)\n"
" values (?, ?/***, ?***/, ?)') (:id, :name/***, :address***/, :info)\n"
" on external data source '");
strcat(buffer, outSqlDa->sqlvar[0].sqldata + sizeof(short));
strcat(buffer, "';\nend");
AutoRelease<IAttachment> attachment(context->getAttachment(status));
AutoRelease<ITransaction> transaction(context->getTransaction(status));
stmt.reset(attachment->prepare(status, transaction, 0, buffer, SQL_DIALECT_CURRENT, 0));
delete [] outSqlDa->sqlvar[0].sqldata;
delete [] reinterpret_cast<char*>(outSqlDa);
}
/***
FB_UDR_DESTRUCTOR
{
}
***/
FB_UDR_EXECUTE_TRIGGER
{
AutoRelease<ITransaction> transaction(context->getTransaction(status));
stmt->execute(status, transaction, triggerMetadata, newFields, NULL, NULL);
}
AutoRelease<IMessageMetadata> triggerMetadata;
AutoRelease<IStatement> stmt;
FB_UDR_END_TRIGGER