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//-----------------------------------------------------------------------------
// Copyright (c) 2020, 2022, Oracle and/or its affiliates.
//
// This software is dual-licensed to you under the Universal Permissive License
// (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
// 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
// either license.
//
// If you elect to accept the software under the Apache License, Version 2.0,
// the following applies:
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// DemoShardingNumberKey.c
// Demos simple use of sharding with a numeric key. The sample schema
// provided does not include suppoort for running this demo. A sharded database
// must first be created. Information on how to create a sharded database can
// be found in the documentation:
// https://www.oracle.com/pls/topic/lookup?ctx=dblatest&id=SHARD
//-----------------------------------------------------------------------------
#include "SampleLib.h"
#define SQL_TEXT "select cust_id, cust_name from ShardedTable"
//-----------------------------------------------------------------------------
// main()
//-----------------------------------------------------------------------------
int main(int argc, char **argv)
{
dpiShardingKeyColumn shardingKeyColumn;
dpiConnCreateParams createParams;
dpiNativeTypeNum nativeTypeNum;
dpiData *intData, *strData;
dpiSampleParams *params;
uint32_t bufferRowIndex;
long shardingKeyValue;
dpiStmt *stmt;
dpiConn *conn;
int found;
// verify parameters
if (argc != 2) {
fprintf(stderr, "Specify sharding key to use.\n");
return 1;
}
shardingKeyValue = atol(argv[1]);
printf("Using sharding key value %ld\n", shardingKeyValue);
// connect to database
params = dpiSamples_getParams();
if (dpiContext_initConnCreateParams(params->context, &createParams) < 0)
return dpiSamples_showError();
createParams.shardingKeyColumns = &shardingKeyColumn;
createParams.numShardingKeyColumns = 1;
shardingKeyColumn.oracleTypeNum = DPI_ORACLE_TYPE_NUMBER;
shardingKeyColumn.nativeTypeNum = DPI_NATIVE_TYPE_DOUBLE;
shardingKeyColumn.value.asDouble = shardingKeyValue;
if (dpiConn_create(params->context, params->mainUserName,
params->mainUserNameLength, params->mainPassword,
params->mainPasswordLength, params->connectString,
params->connectStringLength, NULL, &createParams, &conn) < 0)
return dpiSamples_showError();
// perform query
if (dpiConn_prepareStmt(conn, 0, SQL_TEXT, strlen(SQL_TEXT), NULL, 0,
&stmt) < 0)
return dpiSamples_showError();
if (dpiStmt_execute(stmt, 0, NULL) < 0)
return dpiSamples_showError();
while (1) {
if (dpiStmt_fetch(stmt, &found, &bufferRowIndex) < 0)
return dpiSamples_showError();
if (!found)
break;
if (dpiStmt_getQueryValue(stmt, 1, &nativeTypeNum, &intData) < 0)
return dpiSamples_showError();
if (dpiStmt_getQueryValue(stmt, 2, &nativeTypeNum, &strData) < 0)
return dpiSamples_showError();
printf("Row: ID = %g, Name = %.*s\n", intData->value.asDouble,
strData->value.asBytes.length, strData->value.asBytes.ptr);
}
printf("Done.\n");
return 0;
}
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