18 releases (6 breaking)
1.0.0-rc1 | Nov 6, 2024 |
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0.12.0 | Oct 4, 2024 |
0.11.1 | Sep 2, 2024 |
0.10.1 | Jun 28, 2024 |
0.7.3 | Nov 8, 2023 |
#916 in Database interfaces
58 downloads per month
Used in 4 crates
(via spacetimedb-core)
145KB
3K
SLoC
Abstract Virtual Machine for execution of end-user logic
It optimizes the code & include a more general "query planner"
The execution is split in 3 "phases":
1- AST formation
Generate the AST (that could be invalid according to the semantics).
This step is outside the [vm] and can be done, for example, by the SQL layer.
Use [dsl] to build the [expr:Expr] that build the AST.
2- AST validation
Calling eval::optimize verify the code has the correct semantics (ie: It checks types, schemas, functions are valid, etc.), and "desugar" the code in a more optimal form for later execution.
This build expr::Expr that is what could be stored in the database, ie: Is like bytecode.
3- Execution
Run the AST build from expr::Expr. It assumes is correct.
Dependencies
~14MB
~266K SLoC