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query.go
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query.go
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package golang
import (
"fmt"
"strings"
"github.com/kyleconroy/sqlc/internal/metadata"
"github.com/kyleconroy/sqlc/internal/plugin"
)
type QueryValue struct {
Emit bool
EmitPointer bool
Name string
Struct *Struct
Typ string
SQLPackage SQLPackage
}
func (v QueryValue) EmitStruct() bool {
return v.Emit
}
func (v QueryValue) IsStruct() bool {
return v.Struct != nil
}
func (v QueryValue) IsPointer() bool {
return v.EmitPointer && v.Struct != nil
}
func (v QueryValue) isEmpty() bool {
return v.Typ == "" && v.Name == "" && v.Struct == nil
}
func (v QueryValue) Pair() string {
if v.isEmpty() {
return ""
}
return v.Name + " " + v.DefineType()
}
func (v QueryValue) SlicePair() string {
if v.isEmpty() {
return ""
}
return v.Name + " []" + v.DefineType()
}
func (v QueryValue) Type() string {
if v.Typ != "" {
return v.Typ
}
if v.Struct != nil {
return v.Struct.Name
}
panic("no type for QueryValue: " + v.Name)
}
func (v *QueryValue) DefineType() string {
t := v.Type()
if v.IsPointer() {
return "*" + t
}
return t
}
func (v *QueryValue) ReturnName() string {
if v.IsPointer() {
return "&" + v.Name
}
return v.Name
}
func (v QueryValue) UniqueFields() []Field {
seen := map[string]struct{}{}
fields := make([]Field, 0, len(v.Struct.Fields))
for _, field := range v.Struct.Fields {
if _, found := seen[field.Name]; found {
continue
}
seen[field.Name] = struct{}{}
fields = append(fields, field)
}
return fields
}
func (v QueryValue) Params() string {
if v.isEmpty() {
return ""
}
var out []string
if v.Struct == nil {
if strings.HasPrefix(v.Typ, "[]") && v.Typ != "[]byte" && v.SQLPackage != SQLPackagePGX {
out = append(out, "pq.Array("+v.Name+")")
} else {
out = append(out, v.Name)
}
} else {
for _, f := range v.Struct.Fields {
if strings.HasPrefix(f.Type, "[]") && f.Type != "[]byte" && v.SQLPackage != SQLPackagePGX {
out = append(out, "pq.Array("+v.Name+"."+f.Name+")")
} else {
out = append(out, v.Name+"."+f.Name)
}
}
}
if len(out) <= 3 {
return strings.Join(out, ",")
}
out = append(out, "")
return "\n" + strings.Join(out, ",\n")
}
func (v QueryValue) ColumnNames() string {
if v.Struct == nil {
return fmt.Sprintf("[]string{%q}", v.Name)
}
escapedNames := make([]string, len(v.Struct.Fields))
for i, f := range v.Struct.Fields {
escapedNames[i] = fmt.Sprintf("%q", f.DBName)
}
return "[]string{" + strings.Join(escapedNames, ", ") + "}"
}
func (v QueryValue) Scan() string {
var out []string
if v.Struct == nil {
if strings.HasPrefix(v.Typ, "[]") && v.Typ != "[]byte" && v.SQLPackage != SQLPackagePGX {
out = append(out, "pq.Array(&"+v.Name+")")
} else {
out = append(out, "&"+v.Name)
}
} else {
for _, f := range v.Struct.Fields {
if strings.HasPrefix(f.Type, "[]") && f.Type != "[]byte" && v.SQLPackage != SQLPackagePGX {
out = append(out, "pq.Array(&"+v.Name+"."+f.Name+")")
} else {
out = append(out, "&"+v.Name+"."+f.Name)
}
}
}
if len(out) <= 3 {
return strings.Join(out, ",")
}
out = append(out, "")
return "\n" + strings.Join(out, ",\n")
}
// A struct used to generate methods and fields on the Queries struct
type Query struct {
Cmd string
Comments []string
MethodName string
FieldName string
ConstantName string
SQL string
SourceName string
Ret QueryValue
Arg QueryValue
// Used for :copyfrom
Table *plugin.Identifier
}
func (q Query) hasRetType() bool {
scanned := q.Cmd == metadata.CmdOne || q.Cmd == metadata.CmdMany
return scanned && !q.Ret.isEmpty()
}
func (q Query) TableIdentifier() string {
escapedNames := make([]string, 0, 3)
for _, p := range []string{q.Table.Catalog, q.Table.Schema, q.Table.Name} {
if p != "" {
escapedNames = append(escapedNames, fmt.Sprintf("%q", p))
}
}
return "[]string{" + strings.Join(escapedNames, ", ") + "}"
}