implement EndsWithOp

Author: chelsea-lin

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

@@ -293,6 +293,18 @@ def _(op: ops.base_ops.UnaryOp, expr: TypedExpr) -> sge.Expression:
     return sge.Extract(this=sge.Identifier(this="DAYOFYEAR"), expression=expr.expr)
 
 
+@UNARY_OP_REGISTRATION.register(ops.EndsWithOp)
+def _(op: ops.EndsWithOp, expr: TypedExpr) -> sge.Expression:
+    if not op.pat:
+        return sge.false()
+
+    def to_endswith(pat: str) -> sge.Expression:
+        return sge.func("ENDS_WITH", expr.expr, sge.convert(pat))
+
+    conditions = [to_endswith(pat) for pat in op.pat]
+    return functools.reduce(lambda x, y: sge.Or(this=x, expression=y), conditions)
+
+
 @UNARY_OP_REGISTRATION.register(ops.exp_op)
 def _(op: ops.base_ops.UnaryOp, expr: TypedExpr) -> sge.Expression:
     return sge.Case(

tests/unit/core/compile/sqlglot/expressions/snapshots/test_unary_compiler/test_endswith/multiple_patterns.sql

@@ -0,0 +1,13 @@
+WITH `bfcte_0` AS (
+  SELECT
+    `string_col` AS `bfcol_0`
+  FROM `bigframes-dev`.`sqlglot_test`.`scalar_types`
+), `bfcte_1` AS (
+  SELECT
+    *,
+    ENDS_WITH(`bfcol_0`, 'ab') OR ENDS_WITH(`bfcol_0`, 'cd') AS `bfcol_1`
+  FROM `bfcte_0`
+)
+SELECT
+  `bfcol_1` AS `string_col`
+FROM `bfcte_1`

tests/unit/core/compile/sqlglot/expressions/snapshots/test_unary_compiler/test_endswith/no_pattern.sql

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

tests/unit/core/compile/sqlglot/expressions/snapshots/test_unary_compiler/test_endswith/single_pattern.sql

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

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

@@ -125,6 +125,18 @@ def test_dayofyear(scalar_types_df: bpd.DataFrame, snapshot):
     snapshot.assert_match(sql, "out.sql")
 
 
+def test_endswith(scalar_types_df: bpd.DataFrame, snapshot):
+    bf_df = scalar_types_df[["string_col"]]
+    sql = _apply_unary_op(bf_df, ops.EndsWithOp(pat=("ab",)), "string_col")
+    snapshot.assert_match(sql, "single_pattern.sql")
+
+    sql = _apply_unary_op(bf_df, ops.EndsWithOp(pat=("ab", "cd")), "string_col")
+    snapshot.assert_match(sql, "multiple_patterns.sql")
+
+    sql = _apply_unary_op(bf_df, ops.EndsWithOp(pat=()), "string_col")
+    snapshot.assert_match(sql, "no_pattern.sql")
+
+
 def test_exp(scalar_types_df: bpd.DataFrame, snapshot):
     bf_df = scalar_types_df[["float64_col"]]
     sql = _apply_unary_op(bf_df, ops.exp_op, "float64_col")