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  • SDO_RELATE和SDO_GEOM.RELATE

    SDO_RELATE需要事先建立索引,而SDO_GEOM.RELATE不用。

    SDO_RELATE返回True或False,

    SDO_GEOM.RELATE除可返回True或False外,还可返回关系(当mask设为'determine'时)。

        select z.id1,z.id2,
        SDO_RELATE (s1.geom, s2.geom,'mask=TOUCH+OVERLAPBDYDISJOINT+OVERLAPBDYINTERSECT') sdo_relate,
                SDO_GEOM.RELATE(s1.geom,'determine',s2.geom,0.5) relation,
                to_char(regexp_replace(sdo_util.to_gmlgeometry(z.intsxn_geom),'</?[^>]*>|nbsp;|&','')) zc,
                to_char(regexp_replace(sdo_util.to_gmlgeometry(s1.geom),'</?[^>]*>|nbsp;|&','')) sc1,
                to_char(regexp_replace(sdo_util.to_gmlgeometry(s2.geom),'</?[^>]*>|nbsp;|&','')) sc2
                from SALES_INTERSECTION_ZONES z, sales_regions s1,sales_regions s2
                where z.id1=s1.id
                and z.id2=s2.id

    -- Listing 9-15. RELATE Function Complementing the SDO_RELATE Operator
    SELECT sra.id,
    SDO_GEOM.RELATE(sra.geom, 'DETERMINE', srb.geom, 0.5) relationship
    FROM sales_regions srb, sales_regions sra
    WHERE srb.id=51
    AND sra.id<>51
    AND SDO_RELATE (
      sra.geom, srb.geom,
     'mask=TOUCH+OVERLAPBDYDISJOINT+OVERLAPBDYINTERSECT'
    ) = 'TRUE'
    ORDER BY sra.id;

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  • 原文地址:https://www.cnblogs.com/mol1995/p/10860907.html
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