Class AbstractSelectStatementGenerator

java.lang.Object
org.datanucleus.store.rdbms.sql.AbstractSelectStatementGenerator
All Implemented Interfaces:
SelectStatementGenerator
Direct Known Subclasses:
DiscriminatorStatementGenerator, UnionStatementGenerator
public abstract class AbstractSelectStatementGenerator extends Object implements SelectStatementGenerator
Abstract generator of SQLStatements. Based around a candidate(s) and optionally including subclasses. If the candidate type has no table of its own (using "subclass-table") and there isn't a single subclass with its own table then throws a NucleusException since there is no root table to select. Accepts options controlling the generation of the SQL.

  • Field Details

    • storeMgr

      protected final RDBMSStoreManager storeMgr
      Manager for the datastore.

    • clr

      protected final org.datanucleus.ClassLoaderResolver clr
      ClassLoader resolver.

    • parentStmt

      protected SQLStatement parentStmt
      Parent statement.

    • candidateType

      protected Class candidateType
      Candidate type to query.

    • includeSubclasses

      protected final boolean includeSubclasses
      Whether to include iteration through subclasses of the candidate.

    • candidateTable

      protected DatastoreClass candidateTable
      Table where the candidate objects are stored.

    • candidateTableAlias

      protected DatastoreIdentifier candidateTableAlias
      Alias for the candidate table in the SQL statement.

    • candidateTableGroupName

      protected String candidateTableGroupName
      Name of the table-group to use for the candidate(s) (optional, see SQLStatement).

    • joinTable

      Table joinTable
      Join table for the case where we are selecting the join table and returning elements.

    • joinTableAlias

      DatastoreIdentifier joinTableAlias
      Identifier for any join table (optional).

    • joinElementMapping

      JavaTypeMapping joinElementMapping
      Mapping in join table to join to the element.

    • options

      Set<String> options
      Selected options controlling the generation of the SQL statement.

  • Constructor Details

    • AbstractSelectStatementGenerator

      public AbstractSelectStatementGenerator(RDBMSStoreManager storeMgr, org.datanucleus.ClassLoaderResolver clr, Class candidateType, boolean subclasses, DatastoreIdentifier candidateTableAlias, String candidateTableGroupName)
      Constructor for the case where we select the candidate table.
      Parameters:
      storeMgr - Store Manager
      clr - ClassLoader resolver
      candidateType - Candidate root type
      subclasses - Whether to include subclasses
      candidateTableAlias - Alias for the candidate (optional)
      candidateTableGroupName - Name of the table group for the candidate(s) (optional)

    • AbstractSelectStatementGenerator

      public AbstractSelectStatementGenerator(RDBMSStoreManager storeMgr, org.datanucleus.ClassLoaderResolver clr, Class candidateType, boolean subclasses, DatastoreIdentifier candidateTableAlias, String candidateTableGroupName, Table joinTable, DatastoreIdentifier joinTableAlias, JavaTypeMapping joinElementMapping)
      Constructor for the case where we select the join table and join to the candidate table.
      Parameters:
      storeMgr - Store Manager
      clr - ClassLoader resolver
      candidateType - Candidate root type
      subclasses - Whether to include subclasses
      candidateTableAlias - Alias for the candidate (optional)
      candidateTableGroupName - Name of the table group for the candidate(s) (optional)
      joinTable - Join table
      joinTableAlias - Alias for the join table
      joinElementMapping - Mapping to the candidate from the join table

  • Method Details