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Additional documentation.

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This commit is contained in:
go-jet 2019-07-18 17:43:11 +02:00
parent d253a35161
commit b10270b502
48 changed files with 892 additions and 699 deletions
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26
column.go
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@ -7,10 +7,11 @@ type column interface {
TableName() string
setTableName(table string)
setSubQuery(subQuery ExpressionTable)
setSubQuery(subQuery SelectTable)
defaultAlias() string
}
// Column is common column interface for all types of columns.
type Column interface {
Expression
column
@ -23,7 +24,7 @@ type columnImpl struct {
name string
tableName string
subQuery ExpressionTable
subQuery SelectTable
}
func newColumn(name string, tableName string, parent Column) columnImpl {
@ -49,7 +50,7 @@ func (c *columnImpl) setTableName(table string) {
c.tableName = table
}
func (c *columnImpl) setSubQuery(subQuery ExpressionTable) {
func (c *columnImpl) setSubQuery(subQuery SelectTable) {
c.subQuery = subQuery
}
@ -62,7 +63,7 @@ func (c *columnImpl) defaultAlias() string {
}
func (c *columnImpl) serializeForOrderBy(statement statementType, out *sqlBuilder) error {
if statement == set_statement {
if statement == setStatement {
// set Statement (UNION, EXCEPT ...) can reference only select projections in order by clause
out.writeString(`"` + c.defaultAlias() + `"`) //always quote
@ -104,13 +105,13 @@ func (c columnImpl) serialize(statement statementType, out *sqlBuilder, options
//------------------------------------------------------//
// Redefined type to support list of columns as projection
// ColumnList is redefined type to support list of columns as single projection
type ColumnList []Column
// projection interface implementation
func (cl ColumnList) isProjectionType() {}
func (cl ColumnList) from(subQuery ExpressionTable) projection {
func (cl ColumnList) from(subQuery SelectTable) projection {
newProjectionList := ProjectionList{}
for _, column := range cl {
@ -134,8 +135,11 @@ func (cl ColumnList) serializeForProjection(statement statementType, out *sqlBui
// dummy column interface implementation
func (cl ColumnList) Name() string { return "" }
func (cl ColumnList) TableName() string { return "" }
func (cl ColumnList) setTableName(name string) {}
func (cl ColumnList) setSubQuery(subQuery ExpressionTable) {}
func (cl ColumnList) defaultAlias() string { return "" }
// Name is placeholder for ColumnList to implement Column interface
func (cl ColumnList) Name() string { return "" }
// TableName is placeholder for ColumnList to implement Column interface
func (cl ColumnList) TableName() string { return "" }
func (cl ColumnList) setTableName(name string) {}
func (cl ColumnList) setSubQuery(subQuery SelectTable) {}
func (cl ColumnList) defaultAlias() string { return "" }