Class FromTableDirectSource

java.lang.Object
com.mckoi.database.interpret.FromTableDirectSource
All Implemented Interfaces:
FromTableInterface

public class FromTableDirectSource extends Object implements FromTableInterface
An implementation of FromTableInterface that wraps around an TableName/AbstractDataTable object. The handles case insensitive resolution.
Author:
Tobias Downer
  • Constructor Details

  • Method Details

    • getGivenTableName

      public TableName getGivenTableName()
      Returns the given name of the table. For example, if the Part table is aliased as P this returns P. If there is no given name, returns the root table name.
    • getRootTableName

      public TableName getRootTableName()
      Returns the root name of the table. This TableName can always be used as a direct reference to a table in the database.
    • createFetchQueryPlanNode

      public QueryPlanNode createFetchQueryPlanNode()
      Creates a QueryPlanNode to be added into a query tree that fetches the table source.
    • setCaseInsensitive

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

      public 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(String catalog, String schema, 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(String catalog, String schema, String table, 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(String catalog, String schema, String table, 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