should be it

external/duckdb/extension/autocomplete/grammar/statements/alter.gram

@@ -0,0 +1,46 @@
+AlterStatement <- 'ALTER' AlterOptions
+
+
+AlterOptions <- AlterTableStmt / AlterViewStmt / AlterSequenceStmt / AlterDatabaseStmt / AlterSchemaStmt
+
+AlterTableStmt <- 'TABLE' IfExists? BaseTableName AlterTableOptions
+AlterSchemaStmt <- 'SCHEMA' IfExists? QualifiedName RenameAlter
+
+AlterTableOptions <- AddColumn / DropColumn / AlterColumn / AddConstraint / ChangeNullability / RenameColumn / RenameAlter / SetPartitionedBy / ResetPartitionedBy / SetSortedBy / ResetSortedBy
+
+AddConstraint <- 'ADD' TopLevelConstraint
+AddColumn <- 'ADD' 'COLUMN'? IfNotExists? ColumnDefinition
+DropColumn <- 'DROP' 'COLUMN'? IfExists? NestedColumnName DropBehavior?
+AlterColumn <- 'ALTER' 'COLUMN'? NestedColumnName AlterColumnEntry
+RenameColumn <- 'RENAME' 'COLUMN'? NestedColumnName 'TO' Identifier
+NestedColumnName <- (Identifier '.')* ColumnName
+RenameAlter <- 'RENAME' 'TO' Identifier
+SetPartitionedBy <- 'SET' 'PARTITIONED' 'BY' Parens(List(Expression))
+ResetPartitionedBy <- 'RESET' 'PARTITIONED' 'BY'
+SetSortedBy <- 'SET' 'SORTED' 'BY' Parens(OrderByExpressions)
+ResetSortedBy <- 'RESET' 'SORTED' 'BY'
+
+AlterColumnEntry <- AddOrDropDefault / ChangeNullability / AlterType
+
+AddOrDropDefault <- AddDefault / DropDefault
+AddDefault <- 'SET' 'DEFAULT' Expression
+DropDefault <- 'DROP' 'DEFAULT'
+
+ChangeNullability <- ('DROP' / 'SET') 'NOT' 'NULL'
+
+AlterType <- SetData? 'TYPE' Type? UsingExpression?
+SetData <- 'SET' 'DATA'?
+UsingExpression <- 'USING' Expression
+
+AlterViewStmt <- 'VIEW' IfExists? BaseTableName RenameAlter
+
+AlterSequenceStmt <- 'SEQUENCE' IfExists? QualifiedSequenceName AlterSequenceOptions
+
+QualifiedSequenceName <- CatalogQualification? SchemaQualification? SequenceName
+
+AlterSequenceOptions <- RenameAlter / SetSequenceOption
+SetSequenceOption <- List(SequenceOption)
+
+AlterDatabaseStmt <- 'DATABASE' IfExists? Identifier RenameDatabaseAlter
+
+RenameDatabaseAlter <- 'RENAME' 'TO' Identifier