clause

type CTE struct {
	Query        query.Query // SQL standard says only select, postgres allows insert/update/delete
	Name         string
	Columns      []string
	Materialized *bool
	Search       CTESearch
	Cycle        CTECycle
}

type CTECycle struct {
	Columns    []string
	Set        string
	Using      string
	SetVal     any
	DefaultVal any
}

type CTESearch struct {
	Order   string
	Columns []string
	Set     string
}

type Combine struct {
	Strategy string
	Query    query.Query
	All      bool
}

type Conflict struct {
	Do     string // DO NOTHING | DO UPDATE
	Target ConflictTarget
	Set
	Where
}

type ConflictTarget struct {
	Target any
	Where  []any
}

type Fetch struct {
	Count    *int64
	WithTies bool
}

type For struct {
	Strength string
	Tables   []string
	Wait     string
}

type Frame struct {
	Mode      string
	Start     any
	End       any    // can be nil
	Exclusion string // can be empty
}

type FromItem struct {
	Table any

	// Aliases
	Alias   string
	Columns []string

	// Dialect specific modifiers
	Only           bool        // Postgres
	Lateral        bool        // Postgres & MySQL
	WithOrdinality bool        // Postgres
	IndexedBy      *string     // SQLite
	Partitions     []string    // MySQL
	IndexHints     []IndexHint // MySQL

	// Joins
	Joins []Join
}

type FromItems struct {
	Items []FromItem
}

type GroupBy struct {
	Groups   []any
	Distinct bool
	With     string // ROLLUP | CUBE
}

type GroupingSet struct {
	Groups []query.Expression
	Type   string // GROUPING SET | CUBE | ROLLUP
}

type Having struct {
	Conditions []any
}

type IWindow interface {
	SetFrom(string)
	AddPartitionBy(...any)
	AddOrderBy(...any)
	SetMode(string)
	SetStart(any)
	SetEnd(any)
	SetExclusion(string)
}

type IndexHint struct {
	Type    string // USE, FORCE or IGNORE
	Indexes []string
	For     string // JOIN, ORDER BY or GROUP BY
}

type Join struct {
	Type  string
	To    any // the expression for the table
	Alias string

	// Join methods
	Natural bool
	On      []any
	Using   []any
}

type Limit struct {
	// Some DBs (e.g. SQite) can take an expression
	// It is up to the mods to enforce any extra conditions
	Count any
}

type NamedWindow struct {
	Name      string
	Definiton any
}

type Offset struct {
	// Some DBs (e.g. SQite) can take an expression
	// It is up to the mods to enforce any extra conditions
	Count any
}

type OrderBy struct {
	Expressions []OrderDef
}

type OrderDef struct {
	Expression    any
	Direction     string // ASC | DESC | USING operator
	Nulls         string // FIRST | LAST
	CollationName string
}

type Returning struct {
	Expressions []any
}

type Select struct {
	Columns   []any
	Modifiers []any
}

type Set struct {
	Set []any
}

type Table struct {
	Expression any
	Alias      string
	Columns    []string
}

type Values struct {
	// Query takes the highest priority
	// If present, will attempt to insert from this query
	Query query.Query

	// for multiple inserts
	// each sub-slice is one set of values
	Vals []value
}

type Where struct {
	Conditions []any
}

type WindowDef struct {
	From string // an existing window name

	Frame
	// contains filtered or unexported fields
}

type Windows struct {
	Windows []NamedWindow
}

type With struct {
	Recursive bool
	CTEs      []CTE
}