Class FromTableSubQuerySource

  • All Implemented Interfaces:
    FromTableInterface

    public class FromTableSubQuerySource
    extends java.lang.Object
    implements FromTableInterface
    An implementation of FromTableInterface that wraps around a TableSelectExpression object as a sub-query source.
    Author:
    Tobias Downer
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      Variable[] allColumns()
      Returns an array of Variable objects that references each column available in this table set item in order from left column to right column.
      java.lang.String getUniqueKey()
      Returns the unique name of this source.
      java.lang.String getUniqueName()
      Returns a unique name given to this table source.
      boolean matchesReference​(java.lang.String catalog, java.lang.String schema, java.lang.String table)
      Returns true if this source will match the given catalog, schema and table.
      Variable resolveColumn​(java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)
      Returns a Variable that is a fully resolved form of the given column in this table set.
      int resolveColumnCount​(java.lang.String catalog, java.lang.String schema, java.lang.String table, java.lang.String column)
      Returns the number of instances we can resolve the given catalog, schema, table and column name to a column or columns within this item.
      void setCaseInsensitive​(boolean status)
      Toggle the case sensitivity flag.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • FromTableSubQuerySource

        public FromTableSubQuerySource​(DatabaseConnection connection,
                                       java.lang.String unique_key,
                                       TableSelectExpression table_expression,
                                       com.mckoi.database.interpret.TableExpressionFromSet from_set,
                                       TableName aliased_table_name)
        Constructs the source.
    • Method Detail

      • getUniqueKey

        public java.lang.String getUniqueKey()
        Returns the unique name of this source.
      • setCaseInsensitive

        public void setCaseInsensitive​(boolean status)
        Toggle the case sensitivity flag.
      • getUniqueName

        public java.lang.String getUniqueName()
        Description copied from interface: FromTableInterface
        Returns a unique name given to this table source. No other sources will share this identifier string.
        Specified by:
        getUniqueName in interface FromTableInterface
      • matchesReference

        public boolean matchesReference​(java.lang.String catalog,
                                        java.lang.String schema,
                                        java.lang.String table)
        Description copied from interface: FromTableInterface
        Returns true if this source will match the given catalog, schema and table. If any arguments are null then it is not included in the match.

        Used for 'Part.*' type glob searches.

        Specified by:
        matchesReference in interface FromTableInterface
      • resolveColumnCount

        public int resolveColumnCount​(java.lang.String catalog,
                                      java.lang.String schema,
                                      java.lang.String table,
                                      java.lang.String column)
        Description copied from interface: FromTableInterface
        Returns the number of instances we can resolve the given catalog, schema, table and column name to a column or columns within this item. Note that if catalog, schema, table or column is 'null' then it means it doesn't matter.

        For example, say we need to resolve the column 'id' the arguments are null, null, null, "id". This may resolve to multiple columns if there is a mixture of tables with "id" as a column.

        Note that parameters of 'null, null, null, null', 'null, null, null, not null', 'null, null, not null, not null', 'null, not null, not null, not null', and 'not null, not null, not null, not null' are only accepted.

        Specified by:
        resolveColumnCount in interface FromTableInterface
      • resolveColumn

        public Variable resolveColumn​(java.lang.String catalog,
                                      java.lang.String schema,
                                      java.lang.String table,
                                      java.lang.String column)
        Description copied from interface: FromTableInterface
        Returns a Variable that is a fully resolved form of the given column in this table set. This method does not have to check whether the parameters reference more than one column. If more than one column is referenced, the actual column returned is implementation specific.
        Specified by:
        resolveColumn in interface FromTableInterface
      • allColumns

        public Variable[] allColumns()
        Description copied from interface: FromTableInterface
        Returns an array of Variable objects that references each column available in this table set item in order from left column to right column.
        Specified by:
        allColumns in interface FromTableInterface