InsertStatement <- WithClause? 'INSERT' OrAction? 'INTO' InsertTarget ByNameOrPosition? InsertColumnList? InsertValues OnConflictClause? ReturningClause?

OrAction <- 'OR' 'REPLACE' / 'IGNORE'
ByNameOrPosition <- 'BY' 'NAME' / 'POSITION'

InsertTarget <- BaseTableName InsertAlias?
InsertAlias <- 'AS' Identifier

ColumnList <- List(ColId)
InsertColumnList <- Parens(ColumnList)

InsertValues <- SelectStatement / DefaultValues
DefaultValues <- 'DEFAULT' 'VALUES'

OnConflictClause <- 'ON' 'CONFLICT' OnConflictTarget? OnConflictAction

OnConflictTarget <- OnConflictExpressionTarget / OnConflictIndexTarget
OnConflictExpressionTarget <- Parens(List(ColId)) WhereClause?
OnConflictIndexTarget <- 'ON' 'CONSTRAINT' ConstraintName


OnConflictAction <- OnConflictUpdate / OnConflictNothing

OnConflictUpdate <- 'DO' 'UPDATE' 'SET' UpdateSetClause WhereClause?
OnConflictNothing <- 'DO' 'NOTHING'

ReturningClause <- 'RETURNING' TargetList