/// <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(";");
}
}
/// <summary>
/// Parses CREATE INDEX statement.
/// </summary>
public static void Parse(PgDatabase database, string statement)
{
var parser = new Parser(statement);
parser.Expect("CREATE");
var unique = parser.ExpectOptional("UNIQUE");
parser.Expect("INDEX");
parser.ExpectOptional("CONCURRENTLY");
var indexName = ParserUtils.GetObjectName(parser.ParseIdentifier());
parser.Expect("ON");
var tableName = parser.ParseIdentifier();
var definition = parser.Rest();
var schemaName = ParserUtils.GetSchemaName(tableName, database);
if (database.SchemaIsIgnored(schemaName))
{
return;
}
PgSchema schema = database.GetSchema(schemaName);
if (schema == null)
{
throw new TeamworkParserException($"CannotFindSchema {schemaName} from {statement}");
}
var objectName = ParserUtils.GetObjectName(tableName);
PgTable table = schema.GetTable(objectName);
if (table == null)
{
throw new TeamworkParserException($"CannotFindTable {tableName} from {statement}");
}
var index = new PgIndex(indexName);
table.AddIndex(index);
schema.Add(index);
index.Definition = definition.Trim();
index.TableName = table.Name;
index.Unique = unique;
}
public static void Parse(PgDatabase database, string statement)
{
var parser = new Parser(statement);
parser.Expect("CREATE");
var unique = parser.ExpectOptional("UNIQUE");
parser.Expect("INDEX");
parser.ExpectOptional("CONCURRENTLY");
var indexName = ParserUtils.GetObjectName(parser.ParseIdentifier());
parser.Expect("ON");
var tableName = parser.ParseIdentifier();
var definition = parser.GetRest();
var schemaName = ParserUtils.GetSchemaName(tableName, database);
var schema = database.GetSchema(schemaName);
if (schema == null)
{
throw new Exception(string.Format(Resources.CannotFindSchema, schemaName, statement));
}
var objectName = ParserUtils.GetObjectName(tableName);
var table = schema.GetTable(objectName);
if (table == null)
{
throw new Exception(string.Format(Resources.CannotFindTable, tableName, statement));
}
var index = new PgIndex(indexName);
table.AddIndex(index);
schema.AddIndex(index);
index.Definition = definition.Trim();
index.TableName = table.Name;
index.Unique = unique;
}
/// <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;");
}
}
}
internal static Collection <PgIndex> GetIndices(PgTable pgTable)
{
Collection <PgIndex> indices = new Collection <PgIndex>();
string sql = FileHelper.ReadSqlResource("indices.sql");
using (NpgsqlCommand command = new NpgsqlCommand(sql))
{
command.Parameters.AddWithValue("@SchemaName", pgTable.SchemaName);
command.Parameters.AddWithValue("@TableName", pgTable.Name);
using (DataTable table = DbOperation.GetDataTable(command))
{
if (table.Rows.Count > 0)
{
foreach (DataRow row in table.Rows)
{
PgIndex index = new PgIndex
{
SchemaName = pgTable.SchemaName,
TableName = pgTable.Name,
Name = Conversion.TryCastString(row["index_name"]),
Owner = Conversion.TryCastString(row["owner"]),
Type = Conversion.TryCastString(row["type"]),
AccessMethod = Conversion.TryCastString(row["access_method"]),
Definition = Conversion.TryCastString(row["definition"]),
IsClustered = Conversion.TryCastBoolean(row["is_clustered"]),
IsValid = Conversion.TryCastBoolean(row["is_valid"]),
Description = Conversion.TryCastString(row["description"])
};
indices.Add(index);
}
}
}
}
return(indices);
}
