//TODO: get foreign key info...
public static TableInfo GetTableInfo(this QueryRunner database, string schema, string tableName)
{
var sql = @"SELECT distinct ISNULL(sch.name, '') 'SchemaName', tables.name 'TableName', c.name 'ColumnName', c.column_id 'ColumnID',
t.Name 'Datatype', c.max_length 'MaxLength', c.precision 'Precision' ,
c.scale 'Scale', c.is_nullable 'Nullable',
ISNULL((select is_primary_key from sys.indexes i inner join sys.index_columns ic ON ic.object_id = i.object_id AND ic.index_id = i.index_id
where ic.object_id = c.object_id AND ic.column_id = c.column_id and is_primary_key = 1),0) as 'PrimaryKey',
ISNULL(c.is_identity, 0) 'IsIdentity'
FROM sys.columns c INNER JOIN
sys.types t ON c.user_type_id = t.user_type_id
INNER JOIN sys.tables tables ON (tables.object_id = c.object_id)
LEFT OUTER JOIN sys.schemas sch on (sch.schema_id = tables.schema_id)
WHERE c.object_id = OBJECT_ID(@tableName) order by TableName, ColumnID;";
var tableInfo = tableInfoCache.FirstOrDefault(t => t.ConnectionString == database.ConnectionString && t.SchemaName == schema && t.TableName == tableName);
if (tableInfo == null)
{
var columnList = new List<ColumnInfo>();
string actualSchemaName = string.Empty;
string actualTableName = string.Empty;
var query = new SQLQuery(sql);
var schemaTableName = string.IsNullOrEmpty(schema) ? tableName : schema + "." + tableName;
query.Parameters.Add("tableName", schemaTableName);
query.ProcessRow = reader =>
{
columnList.Add(new ColumnInfo(
(string) reader["ColumnName"],
Convert.ToInt32(reader["ColumnID"]),
(string) reader["DataType"],
Convert.ToInt32(reader["MaxLength"]),
Convert.ToInt32(reader["Precision"]),
Convert.ToInt32(reader["Scale"]),
(bool) reader["Nullable"],
(bool) reader["PrimaryKey"],
(bool) reader["IsIdentity"]));
actualSchemaName = (string) reader["SchemaName"];
actualTableName = (string) reader["TableName"];
return true;
};
database.RunQuery(query);
if (columnList.Count == 0)
{
throw new ApplicationException("Couldn't find any columns for table " + schemaTableName);
}
tableInfo = new TableInfo(database.ConnectionString, actualTableName, actualSchemaName, columnList.ToArray());
tableInfoCache.Add(tableInfo);
}
return tableInfo;
}
private void GetDataFromTable(SyncInfo reportInfo, TableInfo tableInfo, TableMapping tableMap, bool isSource, string tableName)
{
string sql;
string parameterSymbol = isSource ? "?" : "@";
bool firstKey = true;
if (isSource && !string.IsNullOrEmpty(tableMap.CustomSourceSQLForSyncOnly))
{
sql = tableMap.CustomSourceSQLForSyncOnly;
}
else
{
var whereColumns = tableInfo.Columns.Where(c => c.PrimaryKey).Select(c => "(" + c.ColumnName + " = " + parameterSymbol + c.ColumnName + ")");
sql = "select * from " + tableName + " where " +
string.Join(" AND ", whereColumns) + ";";
}
var query = new SQLQuery(sql);
foreach (var column in tableInfo.Columns.Where(c => c.PrimaryKey).OrderBy(c => c.ColumnID))
{
if (sql.Contains(parameterSymbol + column.ColumnName))
{
query.Parameters.Add(column.ColumnName, firstKey ? reportInfo.PrimaryKey1 : reportInfo.PrimaryKey2);
}
firstKey = false;
}
if (isSource)
{
query.ProcessRow = reader =>
{
for (int i = 0; i < reader.FieldCount; i++)
{
reportInfo.SourceDataList.Insert(i, ConvertDataTypes(reader[i]));
}
return false;
};
sourceDB.RunQuery(query);
}
else
{
query.ProcessRow = reader =>
{
for (int i = 0; i < reader.FieldCount; i++)
{
reportInfo.DestinationDataList.Insert(i, ConvertDataTypes(reader[i]));
}
return false;
};
destinationDB.RunQuery(query);
}
}
