Package org.apache.flink.sql.parser.ddl.table

Class SqlAlterTableDrop.SqlAlterTableDropColumn

  • All Implemented Interfaces:
    Cloneable, ExtendedSqlNode
    Enclosing class:
    SqlAlterTableDrop
    public static class SqlAlterTableDrop.SqlAlterTableDropColumn
extends SqlAlterTableDrop
    SqlNode to describe ALTER TABLE [IF EXISTS ]table_name DROP column clause.

    Example: DDL like the below for drop column. 

    
 -- drop single column
 ALTER TABLE prod.db.sample DROP col1;

 -- drop multiple columns
 ALTER TABLE prod.db.sample DROP (col1, col2, col3);

    • Constructor Detail

      • SqlAlterTableDropColumn

        public SqlAlterTableDropColumn​(org.apache.calcite.sql.parser.SqlParserPos pos,
                               org.apache.calcite.sql.SqlIdentifier tableName,
                               org.apache.calcite.sql.SqlNodeList columnList,
                               boolean ifTableExists)

    • Method Detail

      • getColumnList

        public org.apache.calcite.sql.SqlNodeList getColumnList()

      • unparseDropOperation

        protected void unparseDropOperation​(org.apache.calcite.sql.SqlWriter writer,
                                    int leftPrec,
                                    int rightPrec)
        Specified by:
        unparseDropOperation in class SqlAlterTableDrop