4paradigm / 4paradigm/OpenMLDB

can't lift child `i` to list for udf functions which requires params as list

Abierto
#3,039 0 comentarios 0 reacciones 1 asignado Reclamado por @aceforeverd Ver en GitHub
bug execute-engine
Lenguaje dominante
C++
Estrellas
1.7k
Forks
331
Merge medio
12 d 12 h
PR fusionados (30 d)
1

Descripción

some udf function requires list param, e.g `lag`, `first_value`, `join`, while some exprs can't infer to list, e.g `case when` expr.

A yaml case:

```yaml
- id: 22
inputs:
- name: t1
columns: ["id string", "gp int", "ts int64", "val int"]
indexs: ["index1:gp:ts"]
rows:
- ["0", 1, 5, 66]
- ["1", 1, 6, 67]
sql: |
select id,
lag(case when ts < 10 then ts else null end, 1) over w as agg
from t1
WINDOW w AS (PARTITION BY gp ORDER BY ts ROWS_RANGE BETWEEN 60d PRECEDING AND CURRENT ROW MAXSIZE 101)
expect:
success: true
```

Guía de contribución

Abrir la guía de contribución

Línea de trabajo

The issue involves UDF functions like `lag` that require list parameters, but certain expressions like `case when` cannot be inferred to a list. Examine the SQL engine's type inference logic, particularly around window functions and expression evaluation. Look at the test case in YAML to understand the failing scenario. Check the code handling UDF parameter lifting and expression type resolution.

Escrito por el modelo de indexación a partir del texto del issue.

Evaluación

Stack tecnológico
sql
Área
databases, machine-learning
Tipo de issue
Error
Dificultad
4/5
Tiempo estimado
3-5 días
Estado de actividad
Estancado
Claridad
Bastante claro
Aptitud para principiantes
35/100

Recibe los nuevos issues en tu correo

Un resumen breve de issues de GitHub para principiantes.