/// <summary>
/// Parses COMMENT ON INDEX.
/// </summary>
private static void ParseIndex(Parser parser, PgDatabase database)
{
var indexName = parser.ParseIdentifier();
var objectName = ParserUtils.GetObjectName(indexName);
var schemaName = ParserUtils.GetSchemaName(indexName, database);
if (database.SchemaIsIgnored(schemaName))
{
return;
}
PgSchema schema = database.GetSchema(schemaName);
PgIndex index = schema.GetIndex(objectName);
if (index == null)
{
PgConstraint primaryKey = schema.GetPrimaryKey(objectName);
parser.Expect("IS");
primaryKey.Comment = GetComment(parser);
parser.Expect(";");
}
else
{
parser.Expect("IS");
index.Comment = GetComment(parser);
parser.Expect(";");
}
}
public static void AlterComments(TextWriter writer, PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (var oldIndex in oldSchema.GetIndexes())
{
var newIndex = newSchema.GetIndex(oldIndex.Name);
if (newIndex == null)
{
continue;
}
if (oldIndex.Comment == null &&
newIndex.Comment != null ||
oldIndex.Comment != null &&
newIndex.Comment != null &&
!oldIndex.Comment.Equals(
newIndex.Comment))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON INDEX ");
writer.Write(PgDiffUtils.GetQuotedName(newIndex.Name));
writer.Write(" IS ");
writer.Write(newIndex.Comment);
writer.WriteLine(';');
}
else if (oldIndex.Comment != null && newIndex.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON INDEX ");
writer.Write(PgDiffUtils.GetQuotedName(newIndex.Name));
writer.WriteLine(" IS NULL;");
}
}
}
/// <summary>
/// Outputs statements for index comments that have changed.
/// </summary>
public static void AlterComments(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
foreach (PgIndex oldIndex in oldSchema.Indexes)
{
PgIndex newIndex = newSchema.GetIndex(oldIndex.Name);
if (newIndex == null)
{
continue;
}
if ((oldIndex.Comment == null && newIndex.Comment != null) ||
(oldIndex.Comment != null &&
newIndex.Comment != null &&
!oldIndex.Comment.Equals(newIndex.Comment)))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON INDEX ");
writer.Write(PgDiffStringExtension.QuoteName(newIndex.Name));
writer.Write(" IS ");
writer.Write(newIndex.Comment);
writer.WriteLine(';');
}
else if (oldIndex.Comment != null && newIndex.Comment == null)
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.Write("COMMENT ON INDEX ");
writer.Write(PgDiffStringExtension.QuoteName(newIndex.Name));
writer.WriteLine(" IS NULL;");
}
}
}
