/// <summary>
/// Read a five column name map file, which is typically created by sqlserver2pgsql.pl
/// It is a tab-delimited file with five columns:
/// SourceTable SourceName Schema NewTable NewName
/// </summary>
/// <param name="mapFile">Tab-delimited text file to read</param>
/// <param name="defaultSchema">Default schema name</param>
/// <param name="warnDuplicateTargetColumnNames">If true, warn the user at the console if multiple columns in a table have the same target column name</param>
/// <param name="tableNameMap">
/// Dictionary where keys are the original (source) table names
/// and values are WordReplacer classes that track the new table names and new column names in PostgreSQL
/// </param>
/// <param name="columnNameMap">
/// Dictionary where keys are new table names
/// and values are a Dictionary of mappings of original column names to new column names in PostgreSQL;
/// names should not have double quotes around them
/// </param>
/// <returns></returns>
public bool LoadSqlServerToPgSqlColumnMapFile(
FileSystemInfo mapFile,
string defaultSchema,
bool warnDuplicateTargetColumnNames,
out Dictionary <string, WordReplacer> tableNameMap,
out Dictionary <string, Dictionary <string, WordReplacer> > columnNameMap)
{
var linesRead = 0;
tableNameMap = new Dictionary <string, WordReplacer>(StringComparer.OrdinalIgnoreCase);
columnNameMap = new Dictionary <string, Dictionary <string, WordReplacer> >(StringComparer.OrdinalIgnoreCase);
try
{
using (var reader = new StreamReader(new FileStream(mapFile.FullName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)))
{
while (!reader.EndOfStream)
{
var dataLine = reader.ReadLine();
linesRead++;
if (string.IsNullOrWhiteSpace(dataLine))
{
continue;
}
var lineParts = dataLine.Split('\t');
if (lineParts.Length < 5)
{
continue;
}
if (linesRead == 1 &&
lineParts[0].Equals("SourceTable", StringComparison.OrdinalIgnoreCase) &&
lineParts[1].Equals("SourceName", StringComparison.OrdinalIgnoreCase))
{
// Header line; skip it
continue;
}
var sourceTableName = lineParts[0];
var sourceColumnName = lineParts[1];
var newSchema = lineParts[2];
var newTableName = PossiblyUnquote(lineParts[3]);
var newColumnName = PossiblyUnquote(lineParts[4]);
if (!tableNameMap.ContainsKey(sourceTableName))
{
string newSchemaToUse;
if (string.IsNullOrEmpty(newSchema))
{
newSchemaToUse = defaultSchema;
}
else
{
newSchemaToUse = newSchema;
}
var replacer = new WordReplacer(sourceTableName, newTableName, newSchemaToUse);
tableNameMap.Add(sourceTableName, replacer);
}
if (!columnNameMap.TryGetValue(newTableName, out var targetTableColumnMap))
{
targetTableColumnMap = new Dictionary <string, WordReplacer>(StringComparer.OrdinalIgnoreCase);
columnNameMap.Add(newTableName, targetTableColumnMap);
}
if (targetTableColumnMap.ContainsKey(sourceColumnName))
{
OnWarningEvent(string.Format(
"In file {0}, table {1} has multiple columns with the same source name, {2}",
mapFile.Name, newTableName, sourceColumnName));
continue;
}
if (targetTableColumnMap.Values.Any(item => item.ReplacementText.Equals(newColumnName)))
{
if (warnDuplicateTargetColumnNames)
{
OnWarningEvent(string.Format(
"In file {0}, table {1} has multiple columns with the same new name, {2}",
mapFile.Name, newTableName, newColumnName));
}
}
var columnNameReplacer = new WordReplacer(sourceColumnName, newColumnName);
targetTableColumnMap.Add(sourceColumnName, columnNameReplacer);
}
}
return(true);
}
catch (Exception ex)
{
OnErrorEvent(string.Format("Error in LoadMapFile, reading line {0}", linesRead), ex);
return(false);
}
}
/// <summary>
/// Read a three column name map file, which is typically sent to DB_Schema_Export_Tool.exe via the ColumnMap parameter when using the ExistingDDL option
/// It is a tab-delimited file with three columns:
/// SourceTableName SourceColumnName TargetColumnName
/// </summary>
/// <param name="mapFile">Tab-delimited text file to read</param>
/// <param name="tableNameMap">
/// Dictionary where keys are the original (source) table names
/// and values are WordReplacer classes that track the new table names and new column names in PostgreSQL
/// </param>
/// <param name="columnNameMap">
/// Dictionary where keys are new table names
/// and values are a Dictionary of mappings of original column names to new column names in PostgreSQL;
/// names should not have double quotes around them
/// </param>
/// <returns></returns>
public bool LoadTableColumnMapFile(
FileSystemInfo mapFile,
IReadOnlyDictionary <string, WordReplacer> tableNameMap,
IDictionary <string, Dictionary <string, WordReplacer> > columnNameMap
)
{
var linesRead = 0;
var missingTablesWarned = new SortedSet <string>(StringComparer.OrdinalIgnoreCase);
try
{
using (var reader = new StreamReader(new FileStream(mapFile.FullName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)))
{
while (!reader.EndOfStream)
{
var dataLine = reader.ReadLine();
linesRead++;
if (string.IsNullOrWhiteSpace(dataLine))
{
continue;
}
var lineParts = dataLine.Split('\t');
if (lineParts.Length < 3)
{
continue;
}
if (linesRead == 1 &&
lineParts[0].Equals("SourceTableName", StringComparison.OrdinalIgnoreCase) &&
lineParts[1].Equals("SourceColumnName", StringComparison.OrdinalIgnoreCase))
{
// Header line; skip it
continue;
}
var sourceTableName = lineParts[0];
var sourceColumnName = lineParts[1];
var newColumnName = PossiblyUnquote(lineParts[2]);
// Look for the table in tableNameMap
if (!tableNameMap.TryGetValue(sourceTableName, out var replacer))
{
if (missingTablesWarned.Contains(sourceTableName))
{
continue;
}
OnWarningEvent(string.Format(
"Table {0} not found in tableNameMap; ignoring column map info for column {1}",
sourceTableName, sourceColumnName));
missingTablesWarned.Add(sourceTableName);
continue;
}
var newTableName = PossiblyUnquote(replacer.ReplacementText);
if (!columnNameMap.TryGetValue(newTableName, out var targetTableColumnMap))
{
targetTableColumnMap = new Dictionary <string, WordReplacer>(StringComparer.OrdinalIgnoreCase);
columnNameMap.Add(newTableName, targetTableColumnMap);
}
if (targetTableColumnMap.ContainsKey(sourceColumnName))
{
// The column rename map has already been defined; this is OK
OnDebugEvent(string.Format("Column mapping already defined for {0} in table {1}", sourceColumnName, sourceTableName));
continue;
}
var columnNameReplacer = new WordReplacer(sourceColumnName, newColumnName);
targetTableColumnMap.Add(sourceColumnName, columnNameReplacer);
}
}
return(true);
}
catch (Exception ex)
{
OnErrorEvent(string.Format("Error in LoadSecondaryMapFile, reading line {0}", linesRead), ex);
return(false);
}
}
