Struct AggregationSqlGenerator 

pub struct AggregationSqlGenerator { /* private fields */ }

Aggregation SQL generator

Implementations

impl AggregationSqlGenerator

pub fn generate_partial_period( &self, plan: &AggregationPlan, config: &PartialPeriodConfig, branch_plan: &BranchPlan, extra_where: Option<&WhereClause>, ) -> Result<PartialPeriodSql>

Generates a UNION ALL query for partial-period aggregation.

Combines fine-grain and coarse-grain branches according to the BranchPlan. Each branch gets the same SELECT columns and aggregate expressions, but fine-grain branches apply DATE_TRUNC to the time-grain column while coarse branches use it directly.

Errors

Returns error if SQL expression generation fails.

impl AggregationSqlGenerator

pub fn build_where_clause_parameterized( &self, where_clause: &WhereClause, metadata: &FactTableMetadata, params: &mut Vec<Value>, ) -> Result<String>

Build a parameterized WHERE … clause, or an empty string if the clause is empty.

Errors

Returns an error if WHERE clause generation fails.

impl AggregationSqlGenerator

pub const fn new(database_type: DatabaseType) -> Self

Create new SQL generator for specific database

pub fn generate_parameterized( &self, plan: &AggregationPlan, ) -> Result<ParameterizedAggregationSql>

Generate a parameterized aggregate SQL query.

All user-supplied string values in WHERE and HAVING clauses are emitted as bind placeholders ($N / ? / @P1 depending on the database dialect) rather than being embedded as escaped string literals. Numeric, boolean, and NULL values are still inlined since they carry no injection risk.

Errors

Returns error if SQL generation fails (unknown aggregate function, etc.).