func initSemanticBQL() {
semanticBQL = &Grammar{}
cloneGrammar(semanticBQL, bql)
// Create and Drop semantic hooks for type.
for _, cls := range (*semanticBQL)["CREATE_GRAPHS"] {
cls.ProcessEnd = semantic.TypeBindingClauseHook(semantic.Create)
}
for _, cls := range (*semanticBQL)["DROP_GRAPHS"] {
cls.ProcessEnd = semantic.TypeBindingClauseHook(semantic.Drop)
}
// Add graph binding collection to GRAPHS and MORE_GRAPHS clauses.
graphSymbols := []semantic.Symbol{"GRAPHS", "MORE_GRAPHS"}
for _, sym := range graphSymbols {
for _, cls := range (*semanticBQL)[sym] {
cls.ProcessedElement = semantic.GraphAccumulatorHook()
}
}
// Insert and Delete semantic hooks addition.
symbols := []semantic.Symbol{
"INSERT_OBJECT", "INSERT_DATA", "DELETE_OBJECT", "DELETE_DATA",
}
for _, sym := range symbols {
for _, cls := range (*semanticBQL)[sym] {
cls.ProcessedElement = semantic.DataAccumulatorHook()
}
}
for _, cls := range (*semanticBQL)["INSERT_OBJECT"] {
cls.ProcessEnd = semantic.TypeBindingClauseHook(semantic.Insert)
}
for _, cls := range (*semanticBQL)["DELETE_OBJECT"] {
cls.ProcessEnd = semantic.TypeBindingClauseHook(semantic.Delete)
}
for _, cls := range (*semanticBQL)["START"] {
if t := cls.Elements[0].Token(); t != lexer.ItemInsert && t != lexer.ItemDelete {
continue
}
cls.ProcessedElement = semantic.DataAccumulatorHook()
}
// Query semantic hooks.
for _, cls := range (*semanticBQL)["WHERE"] {
cls.ProcessStart = semantic.WhereInitWorkingClauseHook()
}
for _, cls := range (*semanticBQL)["NORE_CLAUSES"] {
cls.ProcessEnd = semantic.WhereNextWorkingClauseHook()
}
subSymbols := []semantic.Symbol{"SUBJECT_EXTRACT", "SUBJECT_TYPE", "SUBJECT_ID"}
for _, sym := range subSymbols {
for _, cls := range (*semanticBQL)[sym] {
cls.ProcessedElement = semantic.WhereSubjectClauseHook()
}
}
predSymbols := []semantic.Symbol{
"PREDICATE", "PREDICATE_AS", "PREDICATE_ID", "PREDICATE_AT", "PREDICATE_BOUND_AT",
"PREDICATE_BOUND_AT_BINDINGS", "PREDICATE_BOUND_AT_BINDINGS_END",
}
for _, sym := range predSymbols {
for _, cls := range (*semanticBQL)[sym] {
cls.ProcessedElement = semantic.WherePredicateClauseHook()
}
}
objSymbols := []semantic.Symbol{
"OBJECT", "OBJECT_SUBJECT_EXTRACT", "OBJECT_SUBJECT_TYPE", "OBJECT_SUBJECT_ID",
"OBJECT_PREDICATE_AS", "OBJECT_PREDICATE_ID", "OBJECT_PREDICATE_AT",
"OBJECT_PREDICATE_BOUND_AT", "OBJECT_PREDICATE_BOUND_AT_BINDINGS",
"OBJECT_PREDICATE_BOUND_AT_BINDINGS_END", "OBJECT_LITERAL_AS",
"OBJECT_LITERAL_BINDING_AS", "OBJECT_LITERAL_BINDING_TYPE",
"OBJECT_LITERAL_BINDING_ID", "OBJECT_LITERAL_BINDING_AT",
}
for _, sym := range objSymbols {
for _, cls := range (*semanticBQL)[sym] {
cls.ProcessedElement = semantic.WhereObjectClauseHook()
}
}
}
func initSemanticBQL() {
semanticBQL = &Grammar{}
cloneGrammar(semanticBQL, bql)
// Create and Drop semantic hooks for type.
setClauseHook([]semantic.Symbol{"CREATE_GRAPHS"}, nil, semantic.TypeBindingClauseHook(semantic.Create))
setClauseHook([]semantic.Symbol{"DROP_GRAPHS"}, nil, semantic.TypeBindingClauseHook(semantic.Drop))
// Add graph binding collection to GRAPHS and MORE_GRAPHS clauses.
graphSymbols := []semantic.Symbol{"GRAPHS", "MORE_GRAPHS"}
setElementHook(graphSymbols, semantic.GraphAccumulatorHook(), nil)
// Insert and Delete semantic hooks addition.
insertSymbols := []semantic.Symbol{
"INSERT_OBJECT", "INSERT_DATA", "DELETE_OBJECT", "DELETE_DATA",
}
setElementHook(insertSymbols, semantic.DataAccumulatorHook(), nil)
setClauseHook([]semantic.Symbol{"INSERT_OBJECT"}, nil, semantic.TypeBindingClauseHook(semantic.Insert))
setClauseHook([]semantic.Symbol{"DELETE_OBJECT"}, nil, semantic.TypeBindingClauseHook(semantic.Delete))
// Query semantic hooks.
setClauseHook([]semantic.Symbol{"WHERE"}, semantic.WhereInitWorkingClauseHook(), semantic.VarBindingsGraphChecker())
clauseSymbols := []semantic.Symbol{
"CLAUSES", "MORE_CLAUSES",
}
setClauseHook(clauseSymbols, semantic.WhereNextWorkingClauseHook(), semantic.WhereNextWorkingClauseHook())
subSymbols := []semantic.Symbol{
"CLAUSES", "SUBJECT_EXTRACT", "SUBJECT_TYPE", "SUBJECT_ID",
}
setElementHook(subSymbols, semantic.WhereSubjectClauseHook(), nil)
predSymbols := []semantic.Symbol{
"PREDICATE", "PREDICATE_AS", "PREDICATE_ID", "PREDICATE_AT", "PREDICATE_BOUND_AT",
"PREDICATE_BOUND_AT_BINDINGS", "PREDICATE_BOUND_AT_BINDINGS_END",
}
setElementHook(predSymbols, semantic.WherePredicateClauseHook(), nil)
objSymbols := []semantic.Symbol{
"OBJECT", "OBJECT_SUBJECT_EXTRACT", "OBJECT_SUBJECT_TYPE", "OBJECT_SUBJECT_ID",
"OBJECT_PREDICATE_AS", "OBJECT_PREDICATE_ID", "OBJECT_PREDICATE_AT",
"OBJECT_PREDICATE_BOUND_AT", "OBJECT_PREDICATE_BOUND_AT_BINDINGS",
"OBJECT_PREDICATE_BOUND_AT_BINDINGS_END", "OBJECT_LITERAL_AS",
"OBJECT_LITERAL_BINDING_AS", "OBJECT_LITERAL_BINDING_TYPE",
"OBJECT_LITERAL_BINDING_ID", "OBJECT_LITERAL_BINDING_AT",
}
setElementHook(objSymbols, semantic.WhereObjectClauseHook(), nil)
// Collect binding variables variables.
varSymbols := []semantic.Symbol{
"VARS", "VARS_AS", "MORE_VARS", "COUNT_DISTINCT",
}
setElementHook(varSymbols, semantic.VarAccumulatorHook(), nil)
// Collect and valiadate group by bindinds.
grpSymbols := []semantic.Symbol{"GROUP_BY", "GROUP_BY_BINDINGS"}
setElementHook(grpSymbols, semantic.GroupByBindings(), nil)
setClauseHook([]semantic.Symbol{"GROUP_BY"}, nil, semantic.GroupByBindingsChecker())
// Collect and validate order by bindings.
ordSymbols := []semantic.Symbol{"ORDER_BY", "ORDER_BY_DIRECTION", "ORDER_BY_BINDINGS"}
setElementHook(ordSymbols, semantic.OrderByBindings(), nil)
setClauseHook([]semantic.Symbol{"ORDER_BY"}, nil, semantic.OrderByBindingsChecker())
// Collect the tokens that form the having clause and build the function
// that will evaluate the result rows.
havingSymbols := []semantic.Symbol{"HAVING", "HAVING_CLAUSE", "HAVING_CLAUSE_BINARY_COMPOSITE"}
setElementHook(havingSymbols, semantic.HavingExpression(), nil)
setClauseHook([]semantic.Symbol{"HAVING"}, nil, semantic.HavingExpressionBuilder())
// Global time bound semantic hooks addition.
globalSymbols := []semantic.Symbol{"GLOBAL_TIME_BOUND"}
setElementHook(globalSymbols, semantic.CollectGlobalBounds(), nil)
// LIMIT clause semantic hook addition.
limitSymbols := []semantic.Symbol{"LIMIT"}
setElementHook(limitSymbols, semantic.LimitCollection(), nil)
// Global data accumulator hook.
setElementHook([]semantic.Symbol{"START"}, semantic.DataAccumulatorHook(),
func(cls *Clause) bool {
if t := cls.Elements[0].Token(); t != lexer.ItemInsert && t != lexer.ItemDelete {
return false
}
return true
})
setClauseHook([]semantic.Symbol{"START"}, nil, semantic.GroupByBindingsChecker())
}