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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/common/sqlite_utils.h"
bool DoesSqliteTableExist(sqlite3* db,
const char* db_name,
const char* table_name) {
// sqlite doesn't allow binding parameters as table names, so we have to
// manually construct the sql
std::string sql("SELECT name FROM ");
if (db_name && db_name[0]) {
sql.append(db_name);
sql.push_back('.');
}
sql.append("sqlite_master WHERE type='table' AND name=?");
SQLStatement statement;
if (statement.prepare(db, sql.c_str()) != SQLITE_OK)
return false;
if (statement.bind_text(0, table_name) != SQLITE_OK)
return false;
// we only care about if this matched a row, not the actual data
return sqlite3_step(statement.get()) == SQLITE_ROW;
}
bool DoesSqliteColumnExist(sqlite3* db,
const char* database_name,
const char* table_name,
const char* column_name,
const char* column_type) {
SQLStatement s;
std::string sql;
sql.append("PRAGMA ");
if (database_name && database_name[0]) {
// optional database name specified
sql.append(database_name);
sql.push_back('.');
}
sql.append("TABLE_INFO(");
sql.append(table_name);
sql.append(")");
if (s.prepare(db, sql.c_str()) != SQLITE_OK)
return false;
while (s.step() == SQLITE_ROW) {
if (!strcmp(column_name, s.column_text(1))) {
if (column_type && column_type[0])
return !strcmp(column_type, s.column_text(2));
return true;
}
}
return false;
}
bool DoesSqliteTableHaveRow(sqlite3* db, const char* table_name) {
SQLStatement s;
std::string b;
b.append("SELECT * FROM ");
b.append(table_name);
if (s.prepare(db, b.c_str()) != SQLITE_OK)
return false;
return s.step() == SQLITE_ROW;
}
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