m::ast::Sema::SemaContext Struct Reference

Holds context information used by semantic analysis of a single statement. More...

#include <Sema.hpp>

Collaboration diagram for m::ast::Sema::SemaContext:

Data Structures
struct	result_t

Public Types
enum	stage_t {   S_From , S_Where , S_GroupBy , S_Having ,   S_Select , S_OrderBy , S_Limit }
using	named_expr_table = std::unordered_multimap< ThreadSafePooledString, std::pair< std::reference_wrapper< Expr >, unsigned > >
	‍list of all computed expressions along with their order
using	source_type = std::variant< std::monostate, std::reference_wrapper< const Table >, named_expr_table >
	‍the type of a source of data: either a database table or a nested query with named results
using	source_table = std::unordered_map< ThreadSafePooledString, std::pair< source_type, unsigned > >
	‍associative container mapping source name to data source and its order

Public Member Functions
	SemaContext (Stmt &stmt)

Data Fields
ThreadSafePooledOptionalString	alias
	‍if the statement that is being analyzed is a nested query, this is its alias in the outer statement
Stmt &	stmt
	‍the statement that is currently being analyzed and for which this SemaContext is used
enum m::ast::Sema::SemaContext::stage_t	stage = S_From
	current stage
bool	needs_grouping = false
source_table	sources
	‍list of all sources along with their order
std::unordered_multimap< ThreadSafePooledString, result_t >	results
	‍list of all results computed by this statement along with their order
std::unordered_multimap< ThreadSafePooledString, std::reference_wrapper< Expr > >	grouping_keys
	‍list of grouping keys

Detailed Description

Holds context information used by semantic analysis of a single statement.

Definition at line 19 of file Sema.hpp.

Member Typedef Documentation

named_expr_table

using m::ast::Sema::SemaContext::named_expr_table = std::unordered_multimap<ThreadSafePooledString, std::pair<std::reference_wrapper<Expr>, unsigned> >

‍list of all computed expressions along with their order

Definition at line 56 of file Sema.hpp.

source_table

using m::ast::Sema::SemaContext::source_table = std::unordered_map<ThreadSafePooledString, std::pair<source_type, unsigned> >

‍associative container mapping source name to data source and its order

Definition at line 61 of file Sema.hpp.

source_type

using m::ast::Sema::SemaContext::source_type = std::variant<std::monostate, std::reference_wrapper<const Table>, named_expr_table>

‍the type of a source of data: either a database table or a nested query with named results

Definition at line 59 of file Sema.hpp.

Member Enumeration Documentation

stage_t

enum m::ast::Sema::SemaContext::stage_t

Enumerator
S_From
S_Where
S_GroupBy
S_Having
S_Select
S_OrderBy
S_Limit

Definition at line 26 of file Sema.hpp.

Constructor & Destructor Documentation

SemaContext()

m::ast::Sema::SemaContext::SemaContext ( Stmt &  stmt )

inline

Definition at line 69 of file Sema.hpp.

Field Documentation

alias

ThreadSafePooledOptionalString m::ast::Sema::SemaContext::alias

‍if the statement that is being analyzed is a nested query, this is its alias in the outer statement

Definition at line 22 of file Sema.hpp.

grouping_keys

std::unordered_multimap<ThreadSafePooledString, std::reference_wrapper<Expr> > m::ast::Sema::SemaContext::grouping_keys

‍list of grouping keys

Definition at line 67 of file Sema.hpp.

needs_grouping

bool m::ast::Sema::SemaContext::needs_grouping = false

Definition at line 36 of file Sema.hpp.

results

std::unordered_multimap<ThreadSafePooledString, result_t> m::ast::Sema::SemaContext::results

‍list of all results computed by this statement along with their order

Definition at line 65 of file Sema.hpp.

sources

source_table m::ast::Sema::SemaContext::sources

‍list of all sources along with their order

Definition at line 63 of file Sema.hpp.

stage

enum m::ast::Sema::SemaContext::stage_t m::ast::Sema::SemaContext::stage = S_From

current stage

stmt

Stmt& m::ast::Sema::SemaContext::stmt

‍the statement that is currently being analyzed and for which this SemaContext is used

Definition at line 25 of file Sema.hpp.

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The documentation for this struct was generated from the following file:

• src/parse/Sema.hpp