DB2SpecificCreator Class

CTor

Gets the alias scopes.

Gets a value indicating whether the creator initiated a subquery creation. The DQE can then decide to limit the SQL emitting as some databases limit features for subqueries.

Gets the DbProviderFactory instance to use.

Gets the parameter prefix, if required. If no parameter prefix is required, this property will return the empty string (by default it returns the empty string).

Gets / sets perCallCatalogNameOverwrites name pairs

Gets / sets perCallSchemaNameOverwrites name pairs

Gets a value indicating whether the timeout has to be set on command create.

Adds the parameter to scope tracker.

Appends the character specified to the string builder specified together with ESCAPE to use it as an escape. If a database doesn't support the ESCAPE clause, implement this method and simply return null. By default this method appends ESCAPE parameter, where parameter is a string parameter with the character specified.

Appends the left and right operands to the string builder specified using the operator specified. By default this will do (leftoperand operator rightoperand) however this method allows databases to perform the operator using e.g. function calls.

Appends the elements as a join side to the fragments passed in in the default format: ElementName temporalPredicate alias tableHint. If an element is specified as empty/null, the element is skipped and no trailing space is emitted.

Routine which creates a valid identifier string for the plain identifier string passed in and appends the fragments to the queryfragments specified. For example, the identifier will be surrounded by "[]" on sqlserver. If the specified rawIdentifier needs wrapping with e.g. [], the [ and ] characters are added as separate fragments to toAppendTo so no string concatenation has to take place. Use this method over CreateValidAlias if possible.

Method which clamps the passed in string to F__hashcode of toClamp if the length of toClamp is too long and this creator's useRestrictedLengthOnAliasesOfFields is set to true in the ctor (which is the case in DB2 and Oracle)

Constructs a call to the aggregate function specified with the field name specified as parameter.

Converts the passed in comparison operator to a string usable in a query.

Converts the passed in expression operator (exop) to a string usable in a query

Converts the expression to a query fragment and adds the parameters created during this process to the passed in parametercollection

Converts the name of the field to the plain base name to use further in the CreateFieldName routine. This routine makes sure expressions and function calls are taken into account. Used as the start call from CreateFieldName.

Converts the parameter output value (contained in the parameter specified) to a real value. This is necessary for example if the value of the parameter is a value of a type native to an ADO.NET provider, like OracleDecimal.

Converts the passed in set operator to a string usable in a query

Converts the passed in sort operator to a string usable in a query

Creates a new command.

Creates a new command instance

Creates a new dynamic query engine instance

Creates the name for the field, and takes into account an aggregate function present and an expression present. If one or both are present, the field is replaced with (expression) or surrounded with (aggregate) the function (if applyAggregateFunction is true).

Creates a valid field name based on the passed in IFieldPersistenceInfo implementation. The fieldname is ready to use in queries and contains all pre/postfix characters required. This field name is not padded with an alias if that alias should be created. Effectively, this is the same as CreateFieldName(field persistence info, fieldname, false);

Creats a valid field name based on the passed in IFieldPersistenceInfo implementation. The fieldname is ready to use in queries and contains all pre/postfix characters required.

Creates a valid field name based on the passed in IFieldPersistenceInfo implementation. The fieldname is ready to use in queries and contains all pre/postfix characters required. This field name is not padded with an alias if that alias should be created. Effectively, this is the same as CreateFieldNameSimple(field persistence info, fieldname, false);. The fieldname is 'simple' in that it doesn't contain any catalog, schema or table references.

Creats a valid field name based on the passed in IFieldPersistenceInfo implementation. The fieldname is ready to use in queries and contains all pre/postfix characters required. The fieldname is 'simple' in that it doesn't contain any catalog, schema or table references.

Creates the hint statement for the hint passed in.

Creates a valid Parameter for the pattern in a LIKE statement. This is a special case, because it shouldn't rely on the type of the field the LIKE statement is used with but should be the unicode varchar type.

Creates a new alias scope and makes it active.

Creates a valid object name (f.e. a name for a table or view) based on the passed in IFieldPersistenceInfo implementation. The fieldname is ready to use in queries and contains all pre/postfix characters required.

Creates a valid object name (e.g. a name for a table or view) based on the fragments specified. The name is ready to use and contains all alias wrappings required.

Creates a parameter based on the direction passed in and the value passed in.

Creates a parameter based on the direction passed in and the value passed in.

Creates a valid Parameter based on the passed in IEntityFieldCore implementation and the passed in IFieldPersistenceInfo instance

Creates a valid Parameter based on the passed in IEntityFieldCore implementation and the passed in IFieldPersistenceInfo instance

Creates a new, filled parameter.

Creates a new parameter instance.

Creates a new parameter instance. It sets the value but doesn't set the type so the parameter type depends on the value.

Creates a new parameter instance (with direction: input)

Creates a new parameter instance.

Creates a name usable for a Parameter, based on "p" and a unique marker, prefixed with the parameter prefix for this DQE available in ParameterPrefix.

Creates the name of a parameter based on the values specified, using the pattern: prefix + "p" + parameterNo. For plain sql queries.

Creates the name of a parameter based on the values specified, using the pattern: prefix + nameWithoutPrefix. For plain sql queries.

Creates a new Select Query which is ready to use as a subquery, based on the parameters specified

Creates the temporal table predicate fragment for the predicateType specified

Creates a retrieval query from the tvfcall specified. The query will be a 'SELECT ... FROM functioncall' query.

Routine which creates a valid alias string for the raw alias passed in. For example, the alias will be surrounded by "[]" on sqlserver. Used by the RelationCollection to produce a valid alias for joins.

Destroys the current alias scope and makes the previous one active, if any.

Determines the db type name for value.

Determines whether the specified object is equal to the current object.

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.

Finds the real alias for the entity + objectalias combination. A real alias is necessary as an entity mapped onto multiple tables (through inheritance) is aliased with a single object alias but each target has to have a different real alias. Checks all scopes.

Finds the real alias for the entity + objectalias combination. A real alias is necessary as an entity mapped onto multiple tables (through inheritance) is aliased with a single object alias but each target has to have a different real alias.

Serves as the default hash function.

Gets the new catalog name from the per-call hashtable name overwrites set into this object. If no per call name pairs are defined or the name passed in isn't found, the same name passed in is returned. Wraps the returned value in identifier wrapping chars (e.g. []) if needed. If this is unneeded, call the overload which accepts a flag for this.

Gets the new catalog name from the per-call hashtable name overwrites set into this object. If no per call name pairs are defined or the name passed in isn't found, the same name passed in is returned

Gets the new schema name from the per-call hashtable name overwrites set into this object. If no per call name pairs are defined or the name passed in isn't found, the same name passed in is returned. Wraps the returned value in identifier wrapping chars (e.g. []) if needed. If this is unneeded, call the overload which accepts a flag for this.

Gets the new schema name from the per-call hashtable name overwrites set into this object. If no per call name pairs are defined or the name passed in isn't found, the same name passed in is returned

Gets the real value, by converting the passed in value, if necessary

Gets the real value, by converting the passed in value, if necessary

Gets the Type of the current instance.

Converts the specified operator to a string

Creates a shallow copy of the current Object.

Produces the from clause directive fragments from the specified fromClauseElementDirectives.

Sets this instance as the creator in the DQE. Used in subquery creations, to pass on the creator to a DQE.

Sets the db provider factory parameter data. This will influence which DbProviderFactory is used and which enum types the field persistence info field type names are resolved to.

Sets the size property in the parameter. This is done in this method as some ADO.NET providers have restrictions on which parameters should have the size property set.

Sets the ADO.NET provider specific Enum type of the parameter, using the string presentation specified.

Strips the object name chars from the name passed in. For example [name] will become name

Returns a string that represents the current object.

Returns the SQL functionname to make a string uppercase.