geo_st_centroid_op compiler

Author: chelsea-lin

bigframes/core/compile/sqlglot/expressions/unary_compiler.py

@@ -273,6 +273,11 @@ def _(op: ops.GeoStBufferOp, expr: TypedExpr) -> sge.Expression:
     )
 
 
+@UNARY_OP_REGISTRATION.register(ops.geo_st_centroid_op)
+def _(op: ops.base_ops.UnaryOp, expr: TypedExpr) -> sge.Expression:
+    return sge.func("ST_CENTROID", expr.expr)
+
+
 @UNARY_OP_REGISTRATION.register(ops.geo_st_geogfromtext_op)
 def _(op: ops.base_ops.UnaryOp, expr: TypedExpr) -> sge.Expression:
     return sge.func("SAFE.ST_GEOGFROMTEXT", expr.expr)

tests/unit/core/compile/sqlglot/expressions/snapshots/test_unary_compiler/test_geo_st_centroid/out.sql

@@ -0,0 +1,13 @@
+WITH `bfcte_0` AS (
+  SELECT
+    `geography_col` AS `bfcol_0`
+  FROM `bigframes-dev`.`sqlglot_test`.`scalar_types`
+), `bfcte_1` AS (
+  SELECT
+    *,
+    ST_CENTROID(`bfcol_0`) AS `bfcol_1`
+  FROM `bfcte_0`
+)
+SELECT
+  `bfcol_1` AS `geography_col`
+FROM `bfcte_1`

tests/unit/core/compile/sqlglot/expressions/test_unary_compiler.py

@@ -181,6 +181,13 @@ def test_geo_st_buffer(scalar_types_df: bpd.DataFrame, snapshot):
     snapshot.assert_match(sql, "out.sql")
 
 
+def test_geo_st_centroid(scalar_types_df: bpd.DataFrame, snapshot):
+    bf_df = scalar_types_df[["geography_col"]]
+    sql = _apply_unary_op(bf_df, ops.geo_st_centroid_op, "geography_col")
+
+    snapshot.assert_match(sql, "out.sql")
+
+
 def test_geo_st_geogfromtext(scalar_types_df: bpd.DataFrame, snapshot):
     bf_df = scalar_types_df[["string_col"]]
     sql = _apply_unary_op(bf_df, ops.geo_st_geogfromtext_op, "string_col")