uqa-execution 0.4.6

Volcano physical operators with row-batch pipelines
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

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

//! Retain full table declarations while preparing index ownership and FK conversion.

use super::{
    invalid, BTreeMap, BTreeSet, CatalogFacade, CatalogReadView, RelationIdentity,
    StorageBackendError, StorageBackendResult,
};
use uqa_sql::{
    ast::{ColumnDef, TableConstraintSet},
    schema::constraint_metadata::{identity::claims, CatalogObjectAllocator, CatalogOidClass},
};

pub(super) struct Tables {
    pub rows: BTreeMap<RelationIdentity, uqa_storage::TableSchema>,
    pub declarations: BTreeMap<RelationIdentity, (Vec<ColumnDef>, TableConstraintSet)>,
    pub changed: BTreeSet<RelationIdentity>,
}

impl Tables {
    pub fn load(
        storage: &dyn CatalogFacade,
        names: &crate::schema::indexes::constraint_names::KeyConstraintNames,
    ) -> StorageBackendResult<Self> {
        let rows = storage
            .load_tables()?
            .into_iter()
            .map(|row| (row.relation.clone(), row))
            .collect::<BTreeMap<_, _>>();
        let mut declarations = BTreeMap::new();
        for (name, row) in &rows {
            let columns = if row.columns_json.is_empty() {
                Vec::new()
            } else {
                serde_json::from_str(&row.columns_json)?
            };
            let constraints = names.decode(row)?;
            declarations.insert(name.clone(), (columns, constraints));
        }
        Ok(Self {
            rows,
            declarations,
            changed: BTreeSet::new(),
        })
    }

    pub fn bind_foreign_keys(
        &mut self,
        catalog: &CatalogReadView,
    ) -> StorageBackendResult<CatalogReadView> {
        let mut candidate = catalog.snapshot().clone();
        for (name, (columns, constraints)) in &mut self.declarations {
            if uqa_sql::schema::constraint_views::bind_stored_foreign_key_declarations(
                &StoredNames(&self.rows),
                columns,
                constraints,
            )
            .map_err(invalid)?
            {
                self.changed.insert(name.clone());
                crate::schema::indexes::registry::schema::replace(
                    &mut candidate,
                    name,
                    columns,
                    constraints,
                )?;
            }
        }
        Ok(CatalogReadView::new(candidate))
    }

    pub fn prepare(
        &mut self,
        catalog: &CatalogReadView,
        allocator: &mut dyn CatalogObjectAllocator,
    ) -> StorageBackendResult<CatalogReadView> {
        for (name, (columns, constraints)) in &self.declarations {
            for identity in claims::row_identities(
                columns,
                &constraints.checks,
                &constraints.key_constraints,
                &constraints.foreign_keys,
            ) {
                allocator
                    .include_catalog_identity(name, CatalogOidClass::Constraint, identity)
                    .map_err(|error| StorageBackendError::backend("index owner address", error))?;
            }
        }
        let mut candidate = catalog.snapshot().clone();
        for (root, _) in catalog
            .snapshot()
            .tables
            .iter()
            .filter(|(_, table)| !table.hierarchy.is_partition())
        {
            let changes = crate::schema::indexes::registry::schema::prepare_descendants(
                catalog,
                &mut candidate,
                root,
                allocator,
                |name| {
                    let (columns, constraints) = self
                        .declarations
                        .get(name)
                        .ok_or_else(|| invalid("partition has no stored declaration"))?;
                    Ok((
                        columns.clone(),
                        constraints.clone(),
                        self.rows[name].object_id,
                    ))
                },
            )?;
            for change in changes {
                self.changed.insert(change.relation.clone());
                self.declarations
                    .insert(change.relation, (change.columns, change.constraints));
            }
        }
        Ok(CatalogReadView::new(candidate))
    }
}

struct StoredNames<'a>(&'a BTreeMap<RelationIdentity, uqa_storage::TableSchema>);

impl uqa_sql::schema::constraint_views::StoredTableNames for StoredNames<'_> {
    fn stored_table_exists(&self, relation: &RelationIdentity) -> bool {
        self.0.contains_key(relation)
    }

    fn stored_table_names(&self) -> Vec<RelationIdentity> {
        self.0.keys().cloned().collect()
    }
}