uqa-execution 0.2.2

Volcano physical operators with row-batch pipelines
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151

//
// Unified Query Algebra
//
// Copyright (c) 2023-2026 Cognica, Inc.
//

//! Bind range-polymorphic functions while declared range identity is available.

use uqa_sql::ast::{
    ColumnType, FunctionBinding, FunctionDispatch, RangeFunctionOperation, RangeSubtype,
};
use uqa_sql::SQLParam;

use crate::{RowSchema, ScalarExpr};

use super::{scalar_type_inner, FunctionTypeResolver};

pub(super) fn bind_call(
    name: String,
    binding: &mut Option<FunctionBinding>,
    args: &[ScalarExpr],
    schema: &RowSchema,
    params: &[SQLParam],
    resolver: Option<&dyn FunctionTypeResolver>,
) -> String {
    if binding.is_some() {
        return name;
    }
    let local = name
        .strip_prefix("pg_catalog.")
        .unwrap_or(&name)
        .to_ascii_lowercase();
    if !matches!(
        local.as_str(),
        "lower"
            | "upper"
            | "isempty"
            | "lower_inc"
            | "upper_inc"
            | "lower_inf"
            | "upper_inf"
            | "range_merge"
            | "multirange"
            | "array_overlap"
            | "contains_op"
            | "contained_by_op"
            | "range_adjacent"
    ) {
        return name;
    }
    let Some(first) = args.first() else {
        return name;
    };
    let Ok(Some(first_type)) = scalar_type_inner(first, schema, params, resolver) else {
        return name;
    };
    let Some((subtype, _type_name, multirange)) = range_identity(&first_type) else {
        return name;
    };
    let operation = match local.as_str() {
        "lower" => RangeFunctionOperation::Lower,
        "upper" => RangeFunctionOperation::Upper,
        "isempty" => RangeFunctionOperation::IsEmpty,
        "lower_inc" => RangeFunctionOperation::LowerInclusive,
        "upper_inc" => RangeFunctionOperation::UpperInclusive,
        "lower_inf" => RangeFunctionOperation::LowerInfinite,
        "upper_inf" => RangeFunctionOperation::UpperInfinite,
        "range_merge" => RangeFunctionOperation::Merge,
        "multirange" => RangeFunctionOperation::Multirange,
        "array_overlap" => RangeFunctionOperation::Overlap,
        "contains_op" => RangeFunctionOperation::Contains,
        "contained_by_op" => RangeFunctionOperation::ContainedBy,
        "range_adjacent" => RangeFunctionOperation::Adjacent,
        _ => unreachable!("range function name was checked above"),
    };
    *binding = Some(FunctionBinding::dispatched(FunctionDispatch::Range {
        operation,
        subtype,
        multirange,
    }));
    name
}

pub(super) fn function_type(
    name: &str,
    binding: Option<&FunctionBinding>,
    argument_types: &[Option<ColumnType>],
) -> Option<ColumnType> {
    if let Some(FunctionDispatch::Range {
        operation, subtype, ..
    }) = binding.and_then(|binding| binding.dispatch)
    {
        return Some(match operation {
            RangeFunctionOperation::Lower | RangeFunctionOperation::Upper => subtype.scalar_type(),
            RangeFunctionOperation::Merge => ColumnType::Range(subtype),
            RangeFunctionOperation::Multirange => ColumnType::Multirange(subtype),
            RangeFunctionOperation::IsEmpty
            | RangeFunctionOperation::LowerInclusive
            | RangeFunctionOperation::UpperInclusive
            | RangeFunctionOperation::LowerInfinite
            | RangeFunctionOperation::UpperInfinite
            | RangeFunctionOperation::Overlap
            | RangeFunctionOperation::Contains
            | RangeFunctionOperation::ContainedBy
            | RangeFunctionOperation::Adjacent => ColumnType::Boolean,
        });
    }
    let local = name
        .strip_prefix("pg_catalog.")
        .unwrap_or(name)
        .to_ascii_lowercase();
    if let Some(subtype) = subtype_for_constructor(&local) {
        return Some(if local == subtype.range_name() {
            ColumnType::Range(subtype)
        } else {
            ColumnType::Multirange(subtype)
        });
    }
    let first = argument_types.first()?.as_ref()?;
    let (subtype, _, _) = range_identity(first)?;
    match local.as_str() {
        "lower" | "upper" => Some(subtype.scalar_type()),
        "isempty" | "lower_inc" | "upper_inc" | "lower_inf" | "upper_inf" | "array_overlap"
        | "contains_op" | "contained_by_op" | "range_adjacent" => Some(ColumnType::Boolean),
        "range_merge" => Some(ColumnType::Range(subtype)),
        "multirange" => Some(ColumnType::Multirange(subtype)),
        _ => None,
    }
}

fn range_identity(ty: &ColumnType) -> Option<(RangeSubtype, &'static str, bool)> {
    match ty {
        ColumnType::Range(subtype) => Some((*subtype, subtype.range_name(), false)),
        ColumnType::Multirange(subtype) => Some((*subtype, subtype.multirange_name(), true)),
        ColumnType::Domain { base, .. } => range_identity(base),
        _ => None,
    }
}

fn subtype_for_constructor(name: &str) -> Option<RangeSubtype> {
    [
        RangeSubtype::Integer,
        RangeSubtype::BigInteger,
        RangeSubtype::Numeric,
        RangeSubtype::Date,
        RangeSubtype::Timestamp,
        RangeSubtype::TimestampTz,
    ]
    .into_iter()
    .find(|subtype| name == subtype.range_name() || name == subtype.multirange_name())
}