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Section 1.11.2 describes how to use point clouds to model solids. (Not currently used.) qry_min_res IN NUMBER, Spatial reference (coordinate system) ID associated with the data. If this parameter is null, no SRID value is associated with the data. VAL_D n (NUMBER): Ordinate in dimension n , where n is the highest-numbered dimension. n should match the pc_tot_dimensions parameter value in the call to the SDO_PC_PKG.INIT function when the point cloud was initialized. (Not currently used.) SDO_PC_PKG. TO_GEOMETRY. Subprogram Description. pc_domain IN SDO_ORGSCL_TYPE DEFAULT NULL, SDO_PC_PKG. GET_PT_ > Format. This procedure truncates the point cloud block table and removes the association between the block table and the base table and column combination. The SDO_MBR type is defined as (LOWER_LEFT SDO_VPOINT_TYPE, UPPER_RIGHT SDO_VPOINT_TYPE) and SDO_V_POINT_TYPE is defined as V ARRAY(64) OF NUMBER . pc_tot_dim IN NUMBER, Binary large object (BLOB) containing the point cloud block. The following example returns the block ID and point ID values of points in a point cloud block. It is taken from the sdo_pc.sql example program, which is under $ORACLE_HOME /md/demo/examples/PointCloud/plsql/ if you installed the files from the Oracle Database Examples media (see Oracle Database Examples Installation Guide ). The block table can be dropped only after either of the following occurs: the base table is dropped, or the SDO_PC_PKG.DROP_DEPENDENCIES procedure is executed. Tolerance value for objects in the point cloud. (For information about spatial tolerance, see Section 1.5.5.) If this parameter is null, the default value is 0.0000000000005. other_dimqry IN SDO_MBR, Name of the column of type SDO_PC in the base table. The SDO_PC data type is described in Section 2.5. Section 1.11.2 describes how to use point clouds to model solids. Section 1.11.2 describes how to use point clouds to model solids. Maximum resolution value. Objects in qry with resolutions equal to or greater than qry_min_res and less than or equal to qry_max_res are returned by the clip operation. Name of the base table containing a column of type SDO_PC. num_pts IN NUMBER, The following example initializes a point cloud by creating an SDO_PC object, and it displays the ID of the object. It is taken from the sdo_pc.sql example program, which is under $ORACLE_HOME /md/demo/examples/PointCloud/plsql/ if you installed the files from the Oracle Database Examples media (see Oracle Database Examples Installation Guide )a. pc_extent IN VARCHAR2, Drops the dependencies between a point cloud block table and a specified base table and column. This function returns an SDO_NUMBER_ARRAY object. The array contains multiple pairs of numbers, with each pair identifying the block ID and point ID of a point. For any specific call to this function, the block ID values associated with all points in the returned array will be the same. The SDO_NUMBER_ARRAY type is defined as VARRAY(1048576) OF NUMBER . The following example creates a point cloud. It is taken from the sdo_pc.sql example program, which is under $ORACLE_HOME /md/demo/examples/PointCloud/plsql/ if you installed the files from the Oracle Database Examples media (see Oracle Database Examples Installation Guide ). Initializes a point cloud. col IN VARCHAR2); Returns the block ID and point ID values of the points in a block in a point cloud. Point cloud on which to perform the clip operation. SDO_PC_PKG. DROP_DEPENDENCIES. pc_val_attr_tables IN SDO_STRING_ARRAY DEFAULT NULL, If a value is specified for the clstPcdataTbl parameter, this function populates the table by assigning appropriate values for PTN_ID and POINT_ID and by copying the values from the inptable table or view for other attributes. This table can be created as an index organized table. It can be used in applications for searching using SQL queries on dimensions other than those reflected in the index dimensionality. (For an explanation of index dimensionality and total dimensionality, see the explanation of the pc_tot_dimensions parameter of the SDO_PC_PKG.INIT function.) After you use this function to create an SDO_PC object, you can create a point cloud by specifying this object as input to the SDO_PC_PKG.CREATE_PC procedure. Creates a point cloud using the points specified in the inptable parameter. For querying the indexed dimensions of the point cloud: window from which to select objects to be returned; typically a polygon for two-dimensional geometries or a frustum for three-dimensional geometries. SDO_PC object to be used. This object must have been created by the SDO_PC_PKG.INIT function. After you execute this procedure, you can drop the point cloud block table or associate the table with another base table and column combination. For more information, see the Usage Notes for the SDO_PC_PKG.INIT function. VAL_D n (NUMBER): Ordinate in dimension n , where n is the highest-numbered dimension. n should match the pc_tot_dimensions parameter value in the call to the SDO_PC_PKG.INIT function when the point cloud was initialized. Table 28-1 Point Cloud Subprograms. basetable IN VARCHAR2, 28 SDO_PC_PKG Package (Point Clouds) Each point cloud block table can only be associated with only one basetable and basecol combination. Returns a geometry object representing all or part of a point cloud. (Not currently used.) Number of points in the point cloud block. For a point cloud block, the number of points is stored in the NUM_POINTS column of the point cloud block table, which is described in Table 2-7 in Section 2.6.1. Section 1.11.2 describes how to use point clouds to model solids. Returns a geometry object representing all or part of a point cloud. Maximum number of points to be included in the resulting geometry. If you specify a view name in the inptable parameter, the query SELECT ROWID FROM must not return any errors. A number specifying the total dimensionality of the point cloud object. For each point in the point cloud blocks, pc_tot_dimensions ordinates (values) are stored. SDO_PC_PKG. CREATE_PC. blk_domain IN SDO_ORGSCL_TYPE DEFAULT NULL, Name of the table or view containing the input point cloud data. This table or view should have the following columns: After you use this function, the blktable table is kept in synchronization with the base table. For example, if a row is deleted from the basetable, the corresponding blocks of the point cloud object in that row are also deleted from the block table; and if the base table base table is truncated, the block table is truncated also. XMLTYPE object specifying any other attributes of the point cloud. If this parameter is null, the point cloud has no other attributes. basecol IN VARCHAR2, This function returns a single multipoint SDO_GEOMETRY object that represents all point geometries in the pts parameter. For example, the points could reflect the result of a clip operation or the contents of an entire block. basetable IN VARCHAR2, Name of the point cloud block table, which is used for storing the blocks of point cloud. This table must exist, and must have been created by a statement in the following form: CREATE TABLE AS select * from mdsys.sdo_pc_blk_table; blkno IN NUMBER DEFAULT NULL. Creates a point cloud using the points specified in the inptable parameter. clstPcdataTbl IN VARCHAR2 DEFAULT NULL); inptable IN VARCHAR2, Performs a clip operation on a point cloud. Performs a clip operation on a point cloud. This function returns points from a point cloud that are within a specified query window and that satisfy any other requirements specified by the parameters. A common use of this function is to perform queries on point clouds. You can maximize the performance of a point cloud query by minimizing the number of objects that the function needs to consider for the operation. Name of a column in base table that was specified in the basecol parameter of the SDO_PC_PKG.INIT function. Name of a base table that was specified (in the basetable parameter of the SDO_PC_PKG.INIT function) when the point cloud was initialized. The SDO_PC and SDO_PC_BLK_TYPE data types are described in Section 2.6. RID (VARCHAR2(24)): Unique ID for each point. Drops the dependencies between a point cloud block table and a specified base table and column. blk_domain IN SDO_ORGSCL_TYPE DEFAULT NULL. The following example performs a clip operation on a point cloud. It is taken from the sdo_pc.sql example program, which is under $ORACLE_HOME /md/demo/examples/PointCloud/plsql/ if you installed the files from the Oracle Database Examples media (see Oracle Database Examples Installation Guide ). blktable IN VARCHAR2, Block ID number of the block to which to restrict the objects returned by the clip operation. If this parameter is null, all objects that satisfy the other parameters are returned. RID (VARCHAR2(24): Unique ID for each point. The first few dimensions of the point cloud are indexed and can later be searched using the SDO_PC_PKG.CLIP_PC function. The exact number of dimensions to index is determined by the dimensionality of the point cloud extent in the initialized point cloud object, specifically: inp.pc_extent.sdo_gtype/1000. If you specify a table name in the clstPcdataTbl parameter, the table must exist and have the following columns: blk_capacity=n , where n is the maximum number of rows in each partition. The default value is 5000. If specified, must be a number greater than or equal to 50. num_pts IN NUMBER, Name of the table for storing the resulting point data. If you do not specify a value, this table is not created. For more information about the table, see the Usage Notes. qry_max_res IN NUMBER, VAL_D1 (NUMBER): Ordinate in dimension 1. The total dimensionality must be greater than or equal to the index dimensionality, which is the number of dimensions in the pc_extent geometry. Specifying total dimensionality greater than index dimensionality enables necessary nonspatial attributes to be retrieved in the same fetch operation with spatial data. The maximum total dimensionality value is 8. The default value for this parameter is 2. Initializes a point cloud by creating an SDO_PC object. Number of spatial dimensions defined for the data. For geodetic data, this geometry must have two dimensions; otherwise, it can have up to four dimensions. The dimensionality of this geometry is used as the minimum value permitted for the pc_tot_dimensions parameter, as explained in the description of that parameter. This chapter contains descriptions of the point cloud subprograms shown in Table 28-1. Minimum resolution value. Objects in qry with resolutions equal to or greater than qry_min_res and less than or equal to qry_max_res are returned by the clip operation. ind_dimqry IN SDO_GEOMETRY, The SDO_PC and SDO_PC_BLK_TYPE data types are described in Section 2.6. pc_tot_dimensions IN NUMBER DEFAULT 2, work_tablespace=x , where x is the name of the tablespace in which to create temporary tables during the partitioning operations. SDO_PC_PKG. INIT. tin_tot_dim IN NUMBER, SDO_GEOMETRY object representing the spatial extent of the point cloud (the minimum bounding object enclosing all objects in the point cloud). This parameter must not be null. Number of dimensions for the points in the point cloud block. For querying the nonindexed dimensions of the point cloud: window from which to select objects to be returned; typically a polygon for two-dimensional geometries or a frustum for three-dimensional geometries. The nonindexed dimensions are those that are included in the total dimensionality but are not indexed. For an explanation of index dimensionality and total dimensionality, see the explanation of the pc_tot_dimensions parameter of the SDO_PC_PKG.INIT function. VAL_D2 (NUMBER): Ordinate in dimension 2. The following example drops the dependencies between a point cloud block table and a base table and column named BASE and PC, respectively. VAL_D1 (NUMBER): Ordinate in dimension 1. BLOB containing the points. SDO_STRING_ARRAY object specifying the names of any value attribute tables for the point cloud. If this parameter is null, the point cloud has no associated value attribute tables. Type SDO_STRING_ARRAY is defined as VARRAY(1048576) OF VARCHAR2(32). ptn_params IN VARCHAR2, Parameters for partitioning the point cloud, specified as a quoted string with keywords delimited by commas. For example: ' blk_capacity=1000,work_tablespace=my_work_ts' . If this parameter is null, the point cloud is not partitioned. The following keywords are permitted: pc_other_attrs IN XMLTYPE DEFAULT NULL, VAL_D2 (NUMBER): Ordinate in dimension 2. To use the subprograms in this package, you must understand the main concepts related to three-dimensional geometries, including the use of point clouds to model solids. Section 1.11 describes support for three-dimensional geometries, Section 1.11.2 describes the use of p[oint clouds to model solids, and Section 2.6 describes data types related to point clouds. SDO_PC_PKG. CLIP_PC. srid IN NUMBER DEFAULT NULL, pc_tol IN NUMBER DEFAULT 0.0000000000005, Section 1.11.2 describes how to use point clouds to model solids.

 

 

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