Class Insert


  • public class Insert
    extends Statement
    The instance class that stores all the information about an insert statement for processing.
    • Field Detail

      • table_name

        java.lang.String table_name
      • col_list

        java.util.ArrayList col_list
      • values_list

        java.util.ArrayList values_list
      • column_sets

        java.util.ArrayList column_sets
      • from_values

        boolean from_values
      • from_select

        boolean from_select
      • from_set

        boolean from_set
      • insert_table

        private DataTable insert_table
        The table we are inserting stuff to.
      • col_index_list

        private int[] col_index_list
        For 'from_values' and 'from_select', this is a list of indices into the 'insert_table' for the columns that we are inserting data into.
      • col_var_list

        private Variable[] col_var_list
        The list of Variable objects the represent the list of columns being inserted into in this query.
      • tname

        private TableName tname
        The TableName we are inserting into.
      • prepared_select

        private Select prepared_select
        If this is a 'from_select' insert, the prepared Select object.
      • relationally_linked_tables

        private java.util.ArrayList relationally_linked_tables
        Tables that are relationally linked to the table being inserted into, set after 'prepare'. This is used to determine the tables we need to read lock because we need to validate relational constraints on the tables.
    • Constructor Detail

      • Insert

        public Insert()
    • Method Detail

      • prepare

        public void prepare()
                     throws DatabaseException
        Description copied from class: Statement
        Prepares the statement with the given Database object. This is called before the statement is evaluated. The prepare statement queries the database and resolves information about the statement (for example, it resolves column names and aliases and determines the tables that are touched by this statement so we can lock the appropriate tables before we evaluate).

        NOTE: Care must be taken to ensure that all methods called here are safe in as far as modifications to the data occuring. The rules for safety should be as follows. If the database is in EXCLUSIVE mode, then we need to wait until it's switched back to SHARED mode before this method is called. All collection of information done here should not involve any table state info. except for column count, column names, column types, etc. Queries such as obtaining the row count, selectable scheme information, and certainly 'getCellContents' must never be called during prepare. When prepare finishes, the affected tables are locked and the query is safe to 'evaluate' at which time table state is safe to inspect.

        Specified by:
        prepare in class Statement
        Throws:
        DatabaseException