gosora/query_gen/acc_builders.go

518 lines
14 KiB
Go

package qgen
import (
"database/sql"
"strings"
//"fmt"
"strconv"
)
type accDeleteBuilder struct {
table string
where string
dateCutoff *dateCutoff // We might want to do this in a slightly less hacky way
build *Accumulator
}
func (b *accDeleteBuilder) Where(w string) *accDeleteBuilder {
if b.where != "" {
b.where += " AND "
}
b.where += w
return b
}
func (b *accDeleteBuilder) DateCutoff(col string, quantity int, unit string) *accDeleteBuilder {
b.dateCutoff = &dateCutoff{col, quantity, unit, 0}
return b
}
func (b *accDeleteBuilder) DateOlderThan(col string, quantity int, unit string) *accDeleteBuilder {
b.dateCutoff = &dateCutoff{col, quantity, unit, 1}
return b
}
func (b *accDeleteBuilder) DateOlderThanQ(col, unit string) *accDeleteBuilder {
b.dateCutoff = &dateCutoff{col, 0, unit, 11}
return b
}
/*func (b *accDeleteBuilder) Prepare() *sql.Stmt {
return b.build.SimpleDelete(b.table, b.where)
}*/
// TODO: Fix this nasty hack
func (b *accDeleteBuilder) Prepare() *sql.Stmt {
// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
if b.dateCutoff != nil {
dBuilder := b.build.GetAdapter().Builder().Delete().FromAcc(b)
return b.build.prepare(b.build.GetAdapter().ComplexDelete(dBuilder))
}
return b.build.SimpleDelete(b.table, b.where)
}
func (b *accDeleteBuilder) Exec(args ...interface{}) (res sql.Result, e error) {
stmt := b.Prepare()
if stmt == nil {
return res, b.build.FirstError()
}
return stmt.Exec(args...)
}
func (b *accDeleteBuilder) Run(args ...interface{}) (int, error) {
res, e := b.Exec(args...)
if e != nil {
return 0, e
}
lastID, e := res.LastInsertId()
return int(lastID), e
}
type accUpdateBuilder struct {
up *updatePrebuilder
build *Accumulator
}
func (u *accUpdateBuilder) Set(set string) *accUpdateBuilder {
u.up.set = set
return u
}
func (u *accUpdateBuilder) Where(where string) *accUpdateBuilder {
if u.up.where != "" {
u.up.where += " AND "
}
u.up.where += where
return u
}
func (b *accUpdateBuilder) DateCutoff(col string, quantity int, unit string) *accUpdateBuilder {
b.up.dateCutoff = &dateCutoff{col, quantity, unit, 0}
return b
}
func (b *accUpdateBuilder) DateOlderThan(col string, quantity int, unit string) *accUpdateBuilder {
b.up.dateCutoff = &dateCutoff{col, quantity, unit, 1}
return b
}
func (b *accUpdateBuilder) DateOlderThanQ(col, unit string) *accUpdateBuilder {
b.up.dateCutoff = &dateCutoff{col, 0, unit, 11}
return b
}
func (b *accUpdateBuilder) WhereQ(sel *selectPrebuilder) *accUpdateBuilder {
b.up.whereSubQuery = sel
return b
}
func (b *accUpdateBuilder) Prepare() *sql.Stmt {
if b.up.whereSubQuery != nil {
return b.build.prepare(b.build.adapter.SimpleUpdateSelect(b.up))
}
return b.build.prepare(b.build.adapter.SimpleUpdate(b.up))
}
func (b *accUpdateBuilder) Stmt() *sql.Stmt {
if b.up.whereSubQuery != nil {
return b.build.prepare(b.build.adapter.SimpleUpdateSelect(b.up))
}
return b.build.prepare(b.build.adapter.SimpleUpdate(b.up))
}
func (b *accUpdateBuilder) Exec(args ...interface{}) (res sql.Result, err error) {
q, e := b.build.adapter.SimpleUpdate(b.up)
if err != nil {
return res, e
}
//fmt.Println("q:", q)
return b.build.exec(q, args...)
}
type AccBuilder interface {
Prepare() *sql.Stmt
}
type AccExec interface {
Exec(args ...interface{}) (res sql.Result, err error)
}
type AccSelectBuilder struct {
table string
columns string
where string
orderby string
limit string
dateCutoff *dateCutoff // We might want to do this in a slightly less hacky way
inChain *AccSelectBuilder
inColumn string
build *Accumulator
}
func (b *AccSelectBuilder) Columns(cols string) *AccSelectBuilder {
b.columns = cols
return b
}
func (b *AccSelectBuilder) Cols(cols string) *AccSelectBuilder {
b.columns = cols
return b
}
func (b *AccSelectBuilder) Where(where string) *AccSelectBuilder {
if b.where != "" {
b.where += " AND "
}
b.where += where
return b
}
// TODO: Don't implement the SQL at the accumulator level but the adapter level
func (b *AccSelectBuilder) In(col string, inList []int) *AccSelectBuilder {
if len(inList) == 0 {
return b
}
var wsb strings.Builder
wsb.Grow(len(col) + 5 + 1 + len(b.where) + (len(inList) * 2))
wsb.WriteString(col)
wsb.WriteString(" IN(")
for i, it := range inList {
if i != 0 {
wsb.WriteRune(',')
}
wsb.WriteString(strconv.Itoa(it))
}
if b.where != "" {
wsb.WriteString(") AND ")
wsb.WriteString(b.where)
} else {
wsb.WriteRune(')')
}
b.where = wsb.String()
return b
}
// TODO: Don't implement the SQL at the accumulator level but the adapter level
func (b *AccSelectBuilder) InPQuery(col string, inList []int) (*sql.Rows, error) {
if len(inList) == 0 {
return nil, sql.ErrNoRows
}
// TODO: Optimise this
where := col + " IN("
idList := make([]interface{}, len(inList))
for i, id := range inList {
idList[i] = strconv.Itoa(id)
where += "?,"
}
where = where[0:len(where)-1] + ")"
if b.where != "" {
where += " AND " + b.where
}
b.where = where
return b.Query(idList...)
}
func (b *AccSelectBuilder) InQ(col string, sb *AccSelectBuilder) *AccSelectBuilder {
b.inChain = sb
b.inColumn = col
return b
}
func (b *AccSelectBuilder) DateCutoff(col string, quantity int, unit string) *AccSelectBuilder {
b.dateCutoff = &dateCutoff{col, quantity, unit, 0}
return b
}
func (b *AccSelectBuilder) DateOlderThanQ(col, unit string) *AccSelectBuilder {
b.dateCutoff = &dateCutoff{col, 0, unit, 11}
return b
}
func (b *AccSelectBuilder) Orderby(orderby string) *AccSelectBuilder {
b.orderby = orderby
return b
}
func (b *AccSelectBuilder) Limit(limit string) *AccSelectBuilder {
b.limit = limit
return b
}
func (b *AccSelectBuilder) Prepare() *sql.Stmt {
// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
if b.dateCutoff != nil || b.inChain != nil {
selectBuilder := b.build.GetAdapter().Builder().Select().FromAcc(b)
return b.build.prepare(b.build.GetAdapter().ComplexSelect(selectBuilder))
}
return b.build.SimpleSelect(b.table, b.columns, b.where, b.orderby, b.limit)
}
func (b *AccSelectBuilder) Stmt() *sql.Stmt {
// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
if b.dateCutoff != nil || b.inChain != nil {
selectBuilder := b.build.GetAdapter().Builder().Select().FromAcc(b)
return b.build.prepare(b.build.GetAdapter().ComplexSelect(selectBuilder))
}
return b.build.SimpleSelect(b.table, b.columns, b.where, b.orderby, b.limit)
}
func (b *AccSelectBuilder) ComplexPrepare() *sql.Stmt {
selectBuilder := b.build.GetAdapter().Builder().Select().FromAcc(b)
return b.build.prepare(b.build.GetAdapter().ComplexSelect(selectBuilder))
}
func (b *AccSelectBuilder) query() (string, error) {
// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
if b.dateCutoff != nil || b.inChain != nil {
selectBuilder := b.build.GetAdapter().Builder().Select().FromAcc(b)
return b.build.GetAdapter().ComplexSelect(selectBuilder)
}
return b.build.adapter.SimpleSelect("", b.table, b.columns, b.where, b.orderby, b.limit)
}
func (b *AccSelectBuilder) Query(args ...interface{}) (*sql.Rows, error) {
stmt := b.Prepare()
if stmt != nil {
return stmt.Query(args...)
}
return nil, b.build.FirstError()
}
type AccRowWrap struct {
row *sql.Row
err error
}
func (w *AccRowWrap) Scan(dest ...interface{}) error {
if w.err != nil {
return w.err
}
return w.row.Scan(dest...)
}
// TODO: Test to make sure the errors are passed up properly
func (b *AccSelectBuilder) QueryRow(args ...interface{}) *AccRowWrap {
stmt := b.Prepare()
if stmt != nil {
return &AccRowWrap{stmt.QueryRow(args...), nil}
}
return &AccRowWrap{nil, b.build.FirstError()}
}
// Experimental, reduces lines
func (b *AccSelectBuilder) Each(h func(*sql.Rows) error) error {
query, e := b.query()
if e != nil {
return e
}
rows, e := b.build.query(query)
if e != nil {
return e
}
defer rows.Close()
for rows.Next() {
if e = h(rows); e != nil {
return e
}
}
return rows.Err()
}
func (b *AccSelectBuilder) EachP(h func(*sql.Rows) error, p ...interface{}) error {
query, e := b.query()
if e != nil {
return e
}
rows, e := b.build.query(query, p)
if e != nil {
return e
}
defer rows.Close()
for rows.Next() {
if e = h(rows); e != nil {
return e
}
}
return rows.Err()
}
func (b *AccSelectBuilder) EachInt(h func(int) error) error {
query, e := b.query()
if e != nil {
return e
}
rows, e := b.build.query(query)
if e != nil {
return e
}
defer rows.Close()
for rows.Next() {
var theInt int
if e = rows.Scan(&theInt); e != nil {
return e
}
if e = h(theInt); e != nil {
return e
}
}
return rows.Err()
}
type accInsertBuilder struct {
table string
columns string
fields string
build *Accumulator
}
func (b *accInsertBuilder) Columns(cols string) *accInsertBuilder {
b.columns = cols
return b
}
func (b *accInsertBuilder) Fields(fields string) *accInsertBuilder {
b.fields = fields
return b
}
func (b *accInsertBuilder) Prepare() *sql.Stmt {
return b.build.SimpleInsert(b.table, b.columns, b.fields)
}
func (b *accInsertBuilder) Exec(args ...interface{}) (res sql.Result, e error) {
q, e := b.build.adapter.SimpleInsert("", b.table, b.columns, b.fields)
if e != nil {
return res, e
}
return b.build.exec(q, args...)
}
func (b *accInsertBuilder) Run(args ...interface{}) (int, error) {
res, e := b.Exec(args...)
if e != nil {
return 0, e
}
lastID, e := res.LastInsertId()
return int(lastID), e
}
type accBulkInsertBuilder struct {
table string
columns string
fieldSet []string
build *Accumulator
}
func (b *accBulkInsertBuilder) Columns(cols string) *accBulkInsertBuilder {
b.columns = cols
return b
}
func (b *accBulkInsertBuilder) Fields(fieldSet ...string) *accBulkInsertBuilder {
b.fieldSet = fieldSet
return b
}
func (b *accBulkInsertBuilder) Prepare() *sql.Stmt {
return b.build.SimpleBulkInsert(b.table, b.columns, b.fieldSet)
}
func (b *accBulkInsertBuilder) Exec(args ...interface{}) (res sql.Result, err error) {
q, e := b.build.adapter.SimpleBulkInsert("", b.table, b.columns, b.fieldSet)
if e != nil {
return res, e
}
return b.build.exec(q, args...)
}
func (b *accBulkInsertBuilder) Run(args ...interface{}) (int, error) {
res, e := b.Exec(args...)
if e != nil {
return 0, e
}
lastID, e := res.LastInsertId()
return int(lastID), e
}
type accCountBuilder struct {
table string
where string
limit string
dateCutoff *dateCutoff // We might want to do this in a slightly less hacky way
inChain *AccSelectBuilder
inColumn string
build *Accumulator
}
func (b *accCountBuilder) Where(w string) *accCountBuilder {
if b.where != "" {
b.where += " AND "
}
b.where += w
return b
}
func (b *accCountBuilder) Limit(limit string) *accCountBuilder {
b.limit = limit
return b
}
func (b *accCountBuilder) DateCutoff(col string, quantity int, unit string) *accCountBuilder {
b.dateCutoff = &dateCutoff{col, quantity, unit, 0}
return b
}
func (b *accCountBuilder) DateOlderThanQ(col, unit string) *accCountBuilder {
b.dateCutoff = &dateCutoff{col, 0, unit, 11}
return b
}
// TODO: Fix this nasty hack
func (b *accCountBuilder) Prepare() *sql.Stmt {
// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
if b.dateCutoff != nil || b.inChain != nil {
selBuilder := b.build.GetAdapter().Builder().Count().FromCountAcc(b)
selBuilder.columns = "COUNT(*)"
return b.build.prepare(b.build.GetAdapter().ComplexSelect(selBuilder))
}
return b.build.SimpleCount(b.table, b.where, b.limit)
}
// TODO: Fix this nasty hack
func (b *accCountBuilder) Stmt() *sql.Stmt {
// TODO: Phase out the procedural API and use the adapter's OO API? The OO API might need a bit more work before we do that and it needs to be rolled out to MSSQL.
if b.dateCutoff != nil || b.inChain != nil {
selBuilder := b.build.GetAdapter().Builder().Count().FromCountAcc(b)
selBuilder.columns = "COUNT(*)"
return b.build.prepare(b.build.GetAdapter().ComplexSelect(selBuilder))
}
return b.build.SimpleCount(b.table, b.where, b.limit)
}
func (b *accCountBuilder) Total() (total int, e error) {
stmt := b.Prepare()
if stmt == nil {
return 0, b.build.FirstError()
}
e = stmt.QueryRow().Scan(&total)
return total, e
}
func (b *accCountBuilder) TotalP(params ...interface{}) (total int, e error) {
stmt := b.Prepare()
if stmt == nil {
return 0, b.build.FirstError()
}
e = stmt.QueryRow(params).Scan(&total)
return total, e
}
// TODO: Add a Sum builder for summing viewchunks up into one number for the dashboard?