Function PutAlterTableStatement

pkg/sql/ast/pool.go:1479–1510

PutAlterTableStatement returns an AlterTableStatement to the pool. It recursively releases nested expressions in column definitions and constraints.

(stmt *AlterTableStatement)

// PutAlterTableStatement returns an AlterTableStatement to the pool.
// It recursively releases nested expressions in column definitions and constraints.
func PutAlterTableStatement(stmt *AlterTableStatement) {
	if stmt == nil {
		return
	}

	for i := range stmt.Actions {
		// Release nested ColumnDef expressions
		if stmt.Actions[i].ColumnDef != nil {
			for j := range stmt.Actions[i].ColumnDef.Constraints {
				PutExpression(stmt.Actions[i].ColumnDef.Constraints[j].Default)
				PutExpression(stmt.Actions[i].ColumnDef.Constraints[j].Check)
				stmt.Actions[i].ColumnDef.Constraints[j].Default = nil
				stmt.Actions[i].ColumnDef.Constraints[j].Check = nil
				stmt.Actions[i].ColumnDef.Constraints[j].References = nil
			}
			stmt.Actions[i].ColumnDef.Constraints = stmt.Actions[i].ColumnDef.Constraints[:0]
			stmt.Actions[i].ColumnDef = nil
		}
		// Release nested TableConstraint expressions
		if stmt.Actions[i].Constraint != nil {
			PutExpression(stmt.Actions[i].Constraint.Check)
			stmt.Actions[i].Constraint.Check = nil
			stmt.Actions[i].Constraint = nil
		}
		stmt.Actions[i].Type = ""
		stmt.Actions[i].ColumnName = ""
	}
	stmt.Actions = stmt.Actions[:0]
	stmt.Table = ""

	alterTableStmtPool.Put(stmt)
}

// GetCreateIndexStatement gets a CreateIndexStatement from the pool.
func GetCreateIndexStatement() *CreateIndexStatement {