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| # Introduction |
| |
| SedonaSQL supports SQL/MM Part3 Spatial SQL Standard. Please read the programming guide: [Sedona with Flink SQL app](../../tutorial/flink/sql.md). |
| |
| Sedona includes SQL operators as follows. |
| |
| * Constructor: Construct a Geometry given an input string or coordinates |
| * Example: ST_GeomFromWKT (string). Create a Geometry from a WKT String. |
| * Function: Execute a function on the given column or columns |
| * Example: ST_Distance (A, B). Given two Geometry A and B, return the Euclidean distance of A and B. |
| * Aggregator: Return a single aggregated value on the given column |
| * Example: ST_Envelope_Aggr (Geometry column). Given a Geometry column, calculate the entire envelope boundary of this column. |
| * Predicate: Execute a logic judgement on the given columns and return true or false |
| * Example: ST_Contains (A, B). Check if A fully contains B. Return "True" if yes, else return "False". |
