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Showing content from https://docs.databricks.com/aws/en/sql/language-manual/functions/h3_try_polyfillash3string below:

h3_try_polyfillash3string function | Databricks Documentation

Applies to: Databricks SQL Databricks Runtime 11.3 LTS and above

Behaves the same as h3_polyfillash3string, except that NULL is returned instead of an error if the first argument is invalid. More precisely, returns an ARRAY of H3 cell IDs (represented as STRING) corresponding to hexagons or pentagons, of the specified resolution, that are contained by the input areal geography.

h3_try_polyfillash3string ( geographyExpr, resolutionExpr )

• geographyExpr: A BINARY or STRING expression representing an areal geography (polygon or multipolygon) in WKB, WKT, or GeoJSON. The geography is expected to have longitude and latitude coordinates in degrees that refer to the WGS84 coordinate reference system.
• resolutionExpr: An INT expression, whose value is expected to be between 0 and 15 inclusive, specifying the resolution for the H3 cells.

An ARRAY of STRING values corresponding to the H3 cell IDs, of the specified resolution, that are contained by the input areal geography.

The function returns NULL if any of the input expressions is NULL. If the first input argument is of type BINARY, the input value is expected to be the WKB description of a polygon or a multipolygon. If the first input argument is of type STRING, the input value is expected to be either the WKT or the GeoJSON description of a polygon or a multipolygon. The dimension of the input polygon or multipolygon can be 2D, 3DZ, 3DM, or 4D. The function returns NULL if the first argument corresponds to an invalid WKB, WKT, or GeoJSON or does not represent a polygon or a multipolygon.

• If resolutionExpr is smaller than 0 or larger than 15, the function returns H3_INVALID_RESOLUTION_VALUE.

SQL

> SELECT h3_try_polyfillash3string('POLYGON((-122.4194 37.7749,-118.2437 34.0522,-74.0060 40.7128,-122.4194 37.7749))', 2)
  [82268ffffffffff,82269ffffffffff,822987fffffffff,8226e7fffffffff,822997fffffffff,8226f7fffffffff,822657fffffffff,8229affffffffff]


> SELECT h3_try_polyfillash3string(unhex('0103000000010000000400000050fc1873d79a5ec0d0d556ec2fe342404182e2c7988f5dc0f46c567dae064140aaf1d24d628052c05e4bc8073d5b444050fc1873d79a5ec0d0d556ec2fe34240'), 2)
  [82268ffffffffff,82269ffffffffff,822987fffffffff,8226e7fffffffff,822997fffffffff,8226f7fffffffff,822657fffffffff,8229affffffffff]


> SELECT h3_try_polyfillash3string('Not-a-valid-rep', 2)
  null


> SELECT h3_try_polyfillash3string('POLYGON((-122.4194 37.7749,-118.2437 34.0522,-74.0060 40.7128,-122.4194 37.7749))', 16)
  [H3_INVALID_RESOLUTION_VALUE] H3 resolution 16 must be between 0 and 15, inclusive

• h3_coverash3 function
• h3_coverash3string function
• h3_polyfillash3 function
• h3_polyfillash3string function
• h3_tessellateaswkb function
• h3_try_polyfillash3 function

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