/// <summary>
/// Parses COMMENT ON COLUMN.
/// </summary>
private static void ParseColumn(Parser parser, PgDatabase database)
{
var columnName = parser.ParseIdentifier();
var objectName = ParserUtils.GetObjectName(columnName);
var tableName = ParserUtils.GetSecondObjectName(columnName);
var schemaName = ParserUtils.GetThirdObjectName(columnName);
if (database.SchemaIsIgnored(schemaName))
{
return;
}
PgSchema schema = database.GetSchema(schemaName);
PgTable table = schema.GetTable(tableName);
if (table == null)
{
PgView view = schema.GetView(tableName);
parser.Expect("IS");
var comment = GetComment(parser);
if (comment == null)
{
view.RemoveColumnComment(objectName);
}
else
{
view.AddColumnComment(objectName, comment);
}
parser.Expect(";");
}
else
{
PgColumn column = table.GetColumn(objectName);
if (column == null)
{
throw new TeamworkParserException($"CannotFindColumnInTable {columnName} from table {table.Name}");
}
parser.Expect("IS");
column.Comment = GetComment(parser);
parser.Expect(";");
}
}
public static void CreateViews(TextWriter writer, PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
foreach (var newView in newSchema.GetViews())
{
if (oldSchema == null ||
!oldSchema.ContainsView(newView.Name) ||
IsViewModified(
oldSchema.GetView(newView.Name), newView))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine(newView.GetCreationSql());
}
}
}
public static void DropViews(TextWriter writer, PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (var oldView in oldSchema.GetViews())
{
var newView = newSchema.GetView(oldView.Name);
if (newView == null || IsViewModified(oldView, newView))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine(oldView.GetDropSql());
}
}
}
/// <summary>
/// Outputs statements for dropping views.
/// </summary>
public static void Drop(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgView oldView in oldSchema.Views)
{
PgView newView = newSchema.GetView(oldView.Name);
if (newView == null || IsViewModified(oldView, newView))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine(oldView.DropSQL);
}
}
}
/// <summary>
/// Parses ALTER TABLE statement.
/// </summary>
public static void Parse(PgDatabase database, string statement, bool outputIgnoredStatements)
{
var parser = new Parser(statement);
parser.Expect("ALTER", "TABLE");
parser.ExpectOptional("ONLY");
var tableName = parser.ParseIdentifier();
var schemaName = ParserUtils.GetSchemaName(tableName, database);
if (database.SchemaIsIgnored(schemaName))
{
return;
}
PgSchema schema = database.GetSchema(schemaName);
if (schema == null)
{
throw new TeamworkParserException($"CannotFindSchema {schemaName} from {statement}");
}
var objectName = ParserUtils.GetObjectName(tableName);
PgTable table = schema.GetTable(objectName);
if (table == null)
{
PgView view = schema.GetView(objectName);
if (view != null)
{
ParseView(parser, view, outputIgnoredStatements, tableName, database);
return;
}
PgSequence sequence = schema.GetSequence(objectName);
if (sequence != null)
{
ParseSequence(parser, sequence, outputIgnoredStatements, tableName, database);
return;
}
throw new TeamworkParserException($"CannotFindObject in {tableName} from {statement}");
}
while (!parser.ExpectOptional(";"))
{
if (parser.ExpectOptional("ALTER"))
{
ParseAlterColumn(parser, table);
}
else if (parser.ExpectOptional("CLUSTER", "ON"))
{
table.ClusterIndexName = ParserUtils.GetObjectName(parser.ParseIdentifier());
}
else if (parser.ExpectOptional("OWNER", "TO"))
{
// we do not parse this one so we just consume the identifier
if (outputIgnoredStatements)
{
database.AddIgnoredStatement("ALTER TABLE " + tableName + " OWNER TO " + parser.ParseIdentifier() + ';');
}
else
{
parser.ParseIdentifier();
}
}
else if (parser.ExpectOptional("ADD"))
{
if (parser.ExpectOptional("FOREIGN", "KEY"))
{
ParseAddForeignKey(parser, table);
}
else if (parser.ExpectOptional("CONSTRAINT"))
{
ParseAddConstraint(parser, table, schema);
}
else
{
throw new TeamworkParserException("CannotParseStringUnsupportedCommand");
}
}
else if (parser.ExpectOptional("ENABLE"))
{
ParseEnable(parser, outputIgnoredStatements, tableName, database);
}
else if (parser.ExpectOptional("DISABLE"))
{
ParseDisable(parser, outputIgnoredStatements, tableName, database);
}
else if (parser.ExpectOptional("REPLICA IDENTITY"))
{
parser.Expect("NOTHING");
}
else
{
throw new TeamworkParserException("CannotParseStringUnsupportedCommand");
}
if (parser.ExpectOptional(";"))
{
break;
}
else
{
parser.Expect(",");
}
}
}
/// <summary>
/// Parses ALTER VIEW statement.
/// </summary>
public static void Parse(PgDatabase database, string statement, bool outputIgnoredStatements)
{
var parser = new Parser(statement);
parser.Expect("ALTER", "VIEW");
var viewName = parser.ParseIdentifier();
var schemaName = ParserUtils.GetSchemaName(viewName, database);
if (database.SchemaIsIgnored(schemaName))
{
return;
}
PgSchema schema = database.GetSchema(schemaName);
if (schema == null)
{
throw new TeamworkParserException($"CannotFindSchema {schemaName} from {statement}");
}
var objectName = ParserUtils.GetObjectName(viewName);
PgView view = schema.GetView(objectName);
if (view == null)
{
throw new TeamworkParserException($"CannotFindView {viewName} from {statement}");
}
while (!parser.ExpectOptional(";"))
{
if (parser.ExpectOptional("ALTER"))
{
parser.ExpectOptional("COLUMN");
var columnName = ParserUtils.GetObjectName(parser.ParseIdentifier());
if (parser.ExpectOptional("SET", "DEFAULT"))
{
var expression = parser.Expression();
view.AddColumnDefaultValue(columnName, expression);
}
else if (parser.ExpectOptional("DROP", "DEFAULT"))
{
view.RemoveColumnDefaultValue(columnName);
}
else
{
throw new TeamworkParserException("CannotParseStringUnsupportedCommand");
}
}
else if (parser.ExpectOptional("OWNER", "TO"))
{
// we do not parse this one so we just consume the identifier
if (outputIgnoredStatements)
{
database.AddIgnoredStatement("ALTER TABLE " + viewName + " OWNER TO " + parser.ParseIdentifier() + ';');
}
else
{
parser.ParseIdentifier();
}
}
else
{
throw new TeamworkParserException("CannotParseStringUnsupportedCommand");
}
}
}
public static void AlterViews(TextWriter writer, PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (var oldView in oldSchema.GetViews())
{
var newView = newSchema.GetView(oldView.Name);
if (newView == null)
{
continue;
}
DiffDefaultValues(writer, oldView, newView, searchPathHelper);
if (oldView.Comment == null &&
newView.Comment != null ||
oldView.Comment != null &&
newView.Comment != null &&
!oldView.Comment.Equals(
newView.Comment))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON VIEW ");
writer.Write(PgDiffUtils.GetQuotedName(newView.Name));
writer.Write(" IS ");
writer.Write(newView.Comment);
writer.WriteLine(';');
}
else if (oldView.Comment != null && newView.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON VIEW ");
writer.Write(PgDiffUtils.GetQuotedName(newView.Name));
writer.WriteLine(" IS NULL;");
}
var columnNames = newView.ColumnComments.Select(c => c.ColumnName).ToList();
foreach (var columnComment in oldView.ColumnComments)
{
if (!columnNames.Contains(columnComment.ColumnName))
{
columnNames.Add(columnComment.ColumnName);
}
}
foreach (var columnName in columnNames)
{
var oldColumnComment = oldView.ColumnComments.FirstOrDefault(cc => columnName.Equals(cc.ColumnName));
var newColumnComment = newView.ColumnComments.FirstOrDefault(cc => columnName.Equals(cc.ColumnName));
if (oldColumnComment == null && newColumnComment != null ||
oldColumnComment != null && newColumnComment != null &&
!oldColumnComment.Comment.Equals(
newColumnComment.Comment))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON COLUMN ");
writer.Write(PgDiffUtils.GetQuotedName(newView.Name));
writer.Write('.');
writer.Write(PgDiffUtils.GetQuotedName(newColumnComment.ColumnName));
writer.Write(" IS ");
writer.Write(newColumnComment.Comment);
writer.WriteLine(';');
}
else if (oldColumnComment != null &&
newColumnComment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON COLUMN ");
writer.Write(PgDiffUtils.GetQuotedName(newView.Name));
writer.Write('.');
writer.Write(PgDiffUtils.GetQuotedName(oldColumnComment.ColumnName));
writer.WriteLine(" IS NULL;");
}
}
}
}
/// <summary>
/// Outputs statements for altering view default values.
/// </summary>
public static void Alter(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgView oldView in oldSchema.Views)
{
PgView newView = newSchema.GetView(oldView.Name);
if (newView == null)
{
continue;
}
DiffDefaultValues(writer, oldView, newView, searchPathHelper);
if ((oldView.Comment == null && newView.Comment != null) ||
(oldView.Comment != null &&
newView.Comment != null &&
!oldView.Comment.Equals(newView.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON VIEW ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write(" IS ");
writer.Write(newView.Comment);
writer.WriteLine(';');
}
else if (oldView.Comment != null && newView.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON VIEW ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.WriteLine(" IS NULL;");
}
IList <string> columnNames = new List <string>(newView.ColumnComments.Count);
foreach (PgView.ColumnComment columnComment in newView.ColumnComments)
{
columnNames.Add(columnComment.ColumnName);
}
foreach (PgView.ColumnComment columnComment in oldView.ColumnComments)
{
if (!columnNames.Contains(columnComment.ColumnName))
{
columnNames.Add(columnComment.ColumnName);
}
}
foreach (var columnName in columnNames)
{
PgView.ColumnComment oldColumnComment = null;
PgView.ColumnComment newColumnComment = null;
foreach (PgView.ColumnComment columnComment in oldView.ColumnComments)
{
if (columnName.Equals(columnComment.ColumnName))
{
oldColumnComment = columnComment;
break;
}
}
foreach (PgView.ColumnComment columnComment in newView.ColumnComments)
{
if (columnName.Equals(columnComment.ColumnName))
{
newColumnComment = columnComment;
break;
}
}
if ((oldColumnComment == null && newColumnComment != null) ||
(oldColumnComment != null &&
newColumnComment != null &&
!oldColumnComment.Comment.Equals(newColumnComment.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write('.');
writer.Write(PgDiffStringExtension.QuoteName(newColumnComment.ColumnName));
writer.Write(" IS ");
writer.Write(newColumnComment.Comment);
writer.WriteLine(';');
}
else if (oldColumnComment != null && newColumnComment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON COLUMN ");
writer.Write(PgDiffStringExtension.QuoteName(newView.Name));
writer.Write('.');
writer.Write(PgDiffStringExtension.QuoteName(oldColumnComment.ColumnName));
writer.WriteLine(" IS NULL;");
}
}
}
}
/// <summary>
/// Outputs statements for creation of views.
/// </summary>
public static void Create(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
foreach (PgView newView in newSchema.Views)
{
if (oldSchema == null || !oldSchema.ContainsView(newView.Name) || IsViewModified(oldSchema.GetView(newView.Name), newView))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine(newView.CreationSQL);
}
}
}
