| /* |
| Copyright 2019 Google LLC |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package spansql |
| |
| // This file holds SQL methods for rendering the types in types.go |
| // as the SQL dialect that this package parses. |
| // |
| // Every exported type has an SQL method that returns a string. |
| // Some also have an addSQL method that efficiently builds that string |
| // in a provided strings.Builder. |
| |
| import ( |
| "fmt" |
| "sort" |
| "strconv" |
| "strings" |
| "time" |
| ) |
| |
| func buildSQL(x interface{ addSQL(*strings.Builder) }) string { |
| var sb strings.Builder |
| x.addSQL(&sb) |
| return sb.String() |
| } |
| |
| func (ct CreateTable) SQL() string { |
| str := "CREATE TABLE " |
| if ct.IfNotExists { |
| str += "IF NOT EXISTS " |
| } |
| str += ct.Name.SQL() + " (\n" |
| for _, c := range ct.Columns { |
| str += " " + c.SQL() + ",\n" |
| } |
| for _, tc := range ct.Constraints { |
| str += " " + tc.SQL() + ",\n" |
| } |
| if len(ct.Synonym) > 0 { |
| str += " SYNONYM(" + ct.Synonym.SQL() + "),\n" |
| } |
| str += ") PRIMARY KEY(" |
| for i, c := range ct.PrimaryKey { |
| if i > 0 { |
| str += ", " |
| } |
| str += c.SQL() |
| } |
| str += ")" |
| if il := ct.Interleave; il != nil { |
| str += ",\n INTERLEAVE IN PARENT " + il.Parent.SQL() + " ON DELETE " + il.OnDelete.SQL() |
| } |
| if rdp := ct.RowDeletionPolicy; rdp != nil { |
| str += ",\n " + rdp.SQL() |
| } |
| return str |
| } |
| |
| func (ci CreateIndex) SQL() string { |
| str := "CREATE" |
| if ci.Unique { |
| str += " UNIQUE" |
| } |
| if ci.NullFiltered { |
| str += " NULL_FILTERED" |
| } |
| str += " INDEX " |
| if ci.IfNotExists { |
| str += "IF NOT EXISTS " |
| } |
| str += ci.Name.SQL() + " ON " + ci.Table.SQL() + "(" |
| for i, c := range ci.Columns { |
| if i > 0 { |
| str += ", " |
| } |
| str += c.SQL() |
| } |
| str += ")" |
| if len(ci.Storing) > 0 { |
| str += " STORING (" + idList(ci.Storing, ", ") + ")" |
| } |
| if ci.Interleave != "" { |
| str += ", INTERLEAVE IN " + ci.Interleave.SQL() |
| } |
| return str |
| } |
| |
| func (cv CreateView) SQL() string { |
| str := "CREATE" |
| if cv.OrReplace { |
| str += " OR REPLACE" |
| } |
| str += " VIEW " + cv.Name.SQL() + " SQL SECURITY " + cv.SecurityType.SQL() + " AS " + cv.Query.SQL() |
| return str |
| } |
| |
| func (st SecurityType) SQL() string { |
| switch st { |
| case Invoker: |
| return "INVOKER" |
| case Definer: |
| return "DEFINER" |
| } |
| panic("unknown SecurityType") |
| } |
| |
| func (cr CreateRole) SQL() string { |
| return "CREATE ROLE " + cr.Name.SQL() |
| } |
| |
| func (cs CreateChangeStream) SQL() string { |
| str := "CREATE CHANGE STREAM " |
| str += cs.Name.SQL() |
| if cs.WatchAllTables { |
| str += " FOR ALL" |
| } else { |
| for i, table := range cs.Watch { |
| if i == 0 { |
| str += " FOR " |
| } else { |
| str += ", " |
| } |
| str += table.SQL() |
| } |
| } |
| if cs.Options != (ChangeStreamOptions{}) { |
| str += " " + cs.Options.SQL() |
| } |
| |
| return str |
| } |
| |
| func (w WatchDef) SQL() string { |
| str := w.Table.SQL() |
| if !w.WatchAllCols { |
| str += "(" |
| for i, c := range w.Columns { |
| if i > 0 { |
| str += ", " |
| } |
| str += c.SQL() |
| } |
| str += ")" |
| } |
| return str |
| } |
| |
| func (dt DropTable) SQL() string { |
| str := "DROP TABLE " |
| if dt.IfExists { |
| str += "IF EXISTS " |
| } |
| str += dt.Name.SQL() |
| return str |
| } |
| |
| func (di DropIndex) SQL() string { |
| str := "DROP INDEX " |
| if di.IfExists { |
| str += "IF EXISTS " |
| } |
| str += di.Name.SQL() |
| return str |
| } |
| |
| func (dv DropView) SQL() string { |
| return "DROP VIEW " + dv.Name.SQL() |
| } |
| |
| func (dr DropRole) SQL() string { |
| return "DROP ROLE " + dr.Name.SQL() |
| } |
| |
| func (gr GrantRole) SQL() string { |
| sql := "GRANT " |
| if gr.Privileges != nil { |
| for i, priv := range gr.Privileges { |
| if i > 0 { |
| sql += ", " |
| } |
| sql += priv.Type.SQL() |
| if priv.Columns != nil { |
| sql += "(" + idList(priv.Columns, ", ") + ")" |
| } |
| } |
| sql += " ON TABLE " + idList(gr.TableNames, ", ") |
| } else if len(gr.TvfNames) > 0 { |
| sql += "EXECUTE ON TABLE FUNCTION " + idList(gr.TvfNames, ", ") |
| } else if len(gr.ViewNames) > 0 { |
| sql += "SELECT ON VIEW " + idList(gr.ViewNames, ", ") |
| } else if len(gr.ChangeStreamNames) > 0 { |
| sql += "SELECT ON CHANGE STREAM " + idList(gr.ChangeStreamNames, ", ") |
| } else { |
| sql += "ROLE " + idList(gr.GrantRoleNames, ", ") |
| } |
| sql += " TO ROLE " + idList(gr.ToRoleNames, ", ") |
| return sql |
| } |
| |
| func (rr RevokeRole) SQL() string { |
| sql := "REVOKE " |
| if rr.Privileges != nil { |
| for i, priv := range rr.Privileges { |
| if i > 0 { |
| sql += ", " |
| } |
| sql += priv.Type.SQL() |
| if priv.Columns != nil { |
| sql += "(" + idList(priv.Columns, ", ") + ")" |
| } |
| } |
| sql += " ON TABLE " + idList(rr.TableNames, ", ") |
| } else if len(rr.TvfNames) > 0 { |
| sql += "EXECUTE ON TABLE FUNCTION " + idList(rr.TvfNames, ", ") |
| } else if len(rr.ViewNames) > 0 { |
| sql += "SELECT ON VIEW " + idList(rr.ViewNames, ", ") |
| } else if len(rr.ChangeStreamNames) > 0 { |
| sql += "SELECT ON CHANGE STREAM " + idList(rr.ChangeStreamNames, ", ") |
| } else { |
| sql += "ROLE " + idList(rr.RevokeRoleNames, ", ") |
| } |
| sql += " FROM ROLE " + idList(rr.FromRoleNames, ", ") |
| return sql |
| } |
| |
| func (dc DropChangeStream) SQL() string { |
| return "DROP CHANGE STREAM " + dc.Name.SQL() |
| } |
| |
| func (acs AlterChangeStream) SQL() string { |
| return "ALTER CHANGE STREAM " + acs.Name.SQL() + " " + acs.Alteration.SQL() |
| } |
| |
| func (scsw AlterWatch) SQL() string { |
| str := "SET FOR " |
| if scsw.WatchAllTables { |
| return str + "ALL" |
| } |
| for i, table := range scsw.Watch { |
| if i > 0 { |
| str += ", " |
| } |
| str += table.SQL() |
| } |
| return str |
| } |
| |
| func (ao AlterChangeStreamOptions) SQL() string { |
| return "SET " + ao.Options.SQL() |
| } |
| |
| func (dcsw DropChangeStreamWatch) SQL() string { |
| return "DROP FOR ALL" |
| } |
| |
| func (cso ChangeStreamOptions) SQL() string { |
| str := "OPTIONS (" |
| hasOpt := false |
| if cso.RetentionPeriod != nil { |
| hasOpt = true |
| str += fmt.Sprintf("retention_period='%s'", *cso.RetentionPeriod) |
| } |
| if cso.ValueCaptureType != nil { |
| if hasOpt { |
| str += ", " |
| } |
| hasOpt = true |
| str += fmt.Sprintf("value_capture_type='%s'", *cso.ValueCaptureType) |
| } |
| str += ")" |
| return str |
| } |
| |
| func (at AlterTable) SQL() string { |
| return "ALTER TABLE " + at.Name.SQL() + " " + at.Alteration.SQL() |
| } |
| |
| func (ac AddColumn) SQL() string { |
| str := "ADD COLUMN " |
| if ac.IfNotExists { |
| str += "IF NOT EXISTS " |
| } |
| str += ac.Def.SQL() |
| return str |
| } |
| |
| func (dc DropColumn) SQL() string { |
| return "DROP COLUMN " + dc.Name.SQL() |
| } |
| |
| func (ac AddConstraint) SQL() string { |
| return "ADD " + ac.Constraint.SQL() |
| } |
| |
| func (dc DropConstraint) SQL() string { |
| return "DROP CONSTRAINT " + dc.Name.SQL() |
| } |
| |
| func (rt RenameTo) SQL() string { |
| str := "RENAME TO " + rt.ToName.SQL() |
| if len(rt.Synonym) > 0 { |
| str += ", ADD SYNONYM " + rt.Synonym.SQL() |
| } |
| return str |
| } |
| |
| func (as AddSynonym) SQL() string { |
| return "ADD SYNONYM " + as.Name.SQL() |
| } |
| |
| func (ds DropSynonym) SQL() string { |
| return "DROP SYNONYM " + ds.Name.SQL() |
| } |
| |
| func (sod SetOnDelete) SQL() string { |
| return "SET ON DELETE " + sod.Action.SQL() |
| } |
| |
| func (od OnDelete) SQL() string { |
| switch od { |
| case NoActionOnDelete: |
| return "NO ACTION" |
| case CascadeOnDelete: |
| return "CASCADE" |
| } |
| panic("unknown OnDelete") |
| } |
| |
| func (ac AlterColumn) SQL() string { |
| return "ALTER COLUMN " + ac.Name.SQL() + " " + ac.Alteration.SQL() |
| } |
| |
| func (ardp AddRowDeletionPolicy) SQL() string { |
| return "ADD " + ardp.RowDeletionPolicy.SQL() |
| } |
| |
| func (rrdp ReplaceRowDeletionPolicy) SQL() string { |
| return "REPLACE " + rrdp.RowDeletionPolicy.SQL() |
| } |
| |
| func (drdp DropRowDeletionPolicy) SQL() string { |
| return "DROP ROW DELETION POLICY" |
| } |
| |
| func (sct SetColumnType) SQL() string { |
| str := sct.Type.SQL() |
| if sct.NotNull { |
| str += " NOT NULL" |
| } |
| if sct.Default != nil { |
| str += " DEFAULT (" + sct.Default.SQL() + ")" |
| } |
| return str |
| } |
| |
| func (sco SetColumnOptions) SQL() string { |
| // TODO: not clear what to do for no options. |
| return "SET " + sco.Options.SQL() |
| } |
| |
| func (sd SetDefault) SQL() string { |
| return "SET DEFAULT (" + sd.Default.SQL() + ")" |
| } |
| |
| func (dp DropDefault) SQL() string { |
| return "DROP DEFAULT" |
| } |
| |
| func (co ColumnOptions) SQL() string { |
| str := "OPTIONS (" |
| if co.AllowCommitTimestamp != nil { |
| if *co.AllowCommitTimestamp { |
| str += "allow_commit_timestamp = true" |
| } else { |
| str += "allow_commit_timestamp = null" |
| } |
| } |
| str += ")" |
| return str |
| } |
| |
| func (rt RenameTable) SQL() string { |
| str := "RENAME TABLE " |
| for i, op := range rt.TableRenameOps { |
| if i > 0 { |
| str += ", " |
| } |
| str += op.FromName.SQL() + " TO " + op.ToName.SQL() |
| } |
| return str |
| } |
| |
| func (ad AlterDatabase) SQL() string { |
| return "ALTER DATABASE " + ad.Name.SQL() + " " + ad.Alteration.SQL() |
| } |
| |
| func (sdo SetDatabaseOptions) SQL() string { |
| return "SET " + sdo.Options.SQL() |
| } |
| |
| func (do DatabaseOptions) SQL() string { |
| str := "OPTIONS (" |
| hasOpt := false |
| if do.OptimizerVersion != nil { |
| hasOpt = true |
| if *do.OptimizerVersion == 0 { |
| str += "optimizer_version=null" |
| } else { |
| str += fmt.Sprintf("optimizer_version=%v", *do.OptimizerVersion) |
| } |
| } |
| if do.OptimizerStatisticsPackage != nil { |
| if hasOpt { |
| str += ", " |
| } |
| hasOpt = true |
| if *do.OptimizerStatisticsPackage == "" { |
| str += "optimizer_statistics_package=null" |
| } else { |
| str += fmt.Sprintf("optimizer_statistics_package='%s'", *do.OptimizerStatisticsPackage) |
| } |
| } |
| if do.VersionRetentionPeriod != nil { |
| if hasOpt { |
| str += ", " |
| } |
| hasOpt = true |
| if *do.VersionRetentionPeriod == "" { |
| str += "version_retention_period=null" |
| } else { |
| str += fmt.Sprintf("version_retention_period='%s'", *do.VersionRetentionPeriod) |
| } |
| } |
| if do.EnableKeyVisualizer != nil { |
| if hasOpt { |
| str += ", " |
| } |
| hasOpt = true |
| if *do.EnableKeyVisualizer { |
| str += "enable_key_visualizer=true" |
| } else { |
| str += "enable_key_visualizer=null" |
| } |
| } |
| if do.DefaultLeader != nil { |
| if hasOpt { |
| str += ", " |
| } |
| hasOpt = true |
| if *do.DefaultLeader == "" { |
| str += "default_leader=null" |
| } else { |
| str += fmt.Sprintf("default_leader='%s'", *do.DefaultLeader) |
| } |
| } |
| str += ")" |
| return str |
| } |
| |
| func (as AlterStatistics) SQL() string { |
| return "ALTER STATISTICS " + as.Name.SQL() + " " + as.Alteration.SQL() |
| } |
| |
| func (sso SetStatisticsOptions) SQL() string { |
| return "SET " + sso.Options.SQL() |
| } |
| |
| func (sa StatisticsOptions) SQL() string { |
| str := "OPTIONS (" |
| if sa.AllowGC != nil { |
| str += fmt.Sprintf("allow_gc=%v", *sa.AllowGC) |
| } |
| str += ")" |
| return str |
| } |
| |
| func (ai AlterIndex) SQL() string { |
| return "ALTER INDEX " + ai.Name.SQL() + " " + ai.Alteration.SQL() |
| } |
| |
| func (asc AddStoredColumn) SQL() string { |
| return "ADD STORED COLUMN " + asc.Name.SQL() |
| } |
| |
| func (dsc DropStoredColumn) SQL() string { |
| return "DROP STORED COLUMN " + dsc.Name.SQL() |
| } |
| |
| func (cs CreateSequence) SQL() string { |
| str := "CREATE SEQUENCE " |
| if cs.IfNotExists { |
| str += "IF NOT EXISTS " |
| } |
| return str + cs.Name.SQL() + " " + cs.Options.SQL() |
| } |
| |
| func (as AlterSequence) SQL() string { |
| return "ALTER SEQUENCE " + as.Name.SQL() + " " + as.Alteration.SQL() |
| } |
| |
| func (sa SetSequenceOptions) SQL() string { |
| return "SET " + sa.Options.SQL() |
| } |
| |
| func (so SequenceOptions) SQL() string { |
| str := "OPTIONS (" |
| hasOpt := false |
| if so.SequenceKind != nil { |
| hasOpt = true |
| str += fmt.Sprintf("sequence_kind='%s'", *so.SequenceKind) |
| } |
| if so.SkipRangeMin != nil { |
| if hasOpt { |
| str += ", " |
| } |
| hasOpt = true |
| str += fmt.Sprintf("skip_range_min=%v", *so.SkipRangeMin) |
| } |
| if so.SkipRangeMax != nil { |
| if hasOpt { |
| str += ", " |
| } |
| hasOpt = true |
| str += fmt.Sprintf("skip_range_max=%v", *so.SkipRangeMax) |
| } |
| if so.StartWithCounter != nil { |
| if hasOpt { |
| str += ", " |
| } |
| hasOpt = true |
| str += fmt.Sprintf("start_with_counter=%v", *so.StartWithCounter) |
| } |
| return str + ")" |
| } |
| |
| func (do DropSequence) SQL() string { |
| str := "DROP SEQUENCE " |
| if do.IfExists { |
| str += "IF EXISTS " |
| } |
| return str + do.Name.SQL() |
| } |
| |
| func (d *Delete) SQL() string { |
| return "DELETE FROM " + d.Table.SQL() + " WHERE " + d.Where.SQL() |
| } |
| |
| func (u *Update) SQL() string { |
| str := "UPDATE " + u.Table.SQL() + " SET " |
| for i, item := range u.Items { |
| if i > 0 { |
| str += ", " |
| } |
| str += item.Column.SQL() + " = " |
| if item.Value != nil { |
| str += item.Value.SQL() |
| } else { |
| str += "DEFAULT" |
| } |
| } |
| str += " WHERE " + u.Where.SQL() |
| return str |
| } |
| |
| func (i *Insert) SQL() string { |
| str := "INSERT INTO " + i.Table.SQL() + " (" |
| for i, column := range i.Columns { |
| if i > 0 { |
| str += ", " |
| } |
| str += column.SQL() |
| } |
| str += ") " |
| str += i.Input.SQL() |
| return str |
| } |
| |
| func (v Values) SQL() string { |
| str := "VALUES " |
| for j, values := range v { |
| if j > 0 { |
| str += ", " |
| } |
| str += "(" |
| |
| for k, value := range values { |
| if k > 0 { |
| str += ", " |
| } |
| str += value.SQL() |
| } |
| str += ")" |
| } |
| return str |
| } |
| |
| func (cd ColumnDef) SQL() string { |
| str := cd.Name.SQL() + " " + cd.Type.SQL() |
| if cd.NotNull { |
| str += " NOT NULL" |
| } |
| if cd.Default != nil { |
| str += " DEFAULT (" + cd.Default.SQL() + ")" |
| } |
| if cd.Generated != nil { |
| str += " AS (" + cd.Generated.SQL() + ") STORED" |
| } |
| if cd.Options != (ColumnOptions{}) { |
| str += " " + cd.Options.SQL() |
| } |
| return str |
| } |
| |
| func (tc TableConstraint) SQL() string { |
| var str string |
| if tc.Name != "" { |
| str += "CONSTRAINT " + tc.Name.SQL() + " " |
| } |
| str += tc.Constraint.SQL() |
| return str |
| } |
| |
| func (rdp RowDeletionPolicy) SQL() string { |
| return "ROW DELETION POLICY ( OLDER_THAN ( " + rdp.Column.SQL() + ", INTERVAL " + strconv.FormatInt(rdp.NumDays, 10) + " DAY ))" |
| } |
| |
| func (fk ForeignKey) SQL() string { |
| str := "FOREIGN KEY (" + idList(fk.Columns, ", ") |
| str += ") REFERENCES " + fk.RefTable.SQL() + " (" |
| str += idList(fk.RefColumns, ", ") + ")" |
| str += " ON DELETE " + fk.OnDelete.SQL() |
| return str |
| } |
| |
| func (c Check) SQL() string { |
| return "CHECK (" + c.Expr.SQL() + ")" |
| } |
| |
| func (t Type) SQL() string { |
| str := t.Base.SQL() |
| if t.Len > 0 && (t.Base == String || t.Base == Bytes) { |
| str += "(" |
| if t.Len == MaxLen { |
| str += "MAX" |
| } else { |
| str += strconv.FormatInt(t.Len, 10) |
| } |
| str += ")" |
| } |
| if t.Array { |
| str = "ARRAY<" + str + ">" |
| } |
| return str |
| } |
| |
| func (tb TypeBase) SQL() string { |
| switch tb { |
| case Bool: |
| return "BOOL" |
| case Int64: |
| return "INT64" |
| case Float64: |
| return "FLOAT64" |
| case Numeric: |
| return "NUMERIC" |
| case String: |
| return "STRING" |
| case Bytes: |
| return "BYTES" |
| case Date: |
| return "DATE" |
| case Timestamp: |
| return "TIMESTAMP" |
| case JSON: |
| return "JSON" |
| } |
| panic("unknown TypeBase") |
| } |
| |
| func (pt PrivilegeType) SQL() string { |
| switch pt { |
| case PrivilegeTypeSelect: |
| return "SELECT" |
| case PrivilegeTypeInsert: |
| return "INSERT" |
| case PrivilegeTypeUpdate: |
| return "UPDATE" |
| case PrivilegeTypeDelete: |
| return "DELETE" |
| } |
| panic("unknown PrivilegeType") |
| } |
| func (kp KeyPart) SQL() string { |
| str := kp.Column.SQL() |
| if kp.Desc { |
| str += " DESC" |
| } |
| return str |
| } |
| |
| func (q Query) SQL() string { return buildSQL(q) } |
| func (q Query) addSQL(sb *strings.Builder) { |
| q.Select.addSQL(sb) |
| if len(q.Order) > 0 { |
| sb.WriteString(" ORDER BY ") |
| for i, o := range q.Order { |
| if i > 0 { |
| sb.WriteString(", ") |
| } |
| o.addSQL(sb) |
| } |
| } |
| if q.Limit != nil { |
| sb.WriteString(" LIMIT ") |
| sb.WriteString(q.Limit.SQL()) |
| if q.Offset != nil { |
| sb.WriteString(" OFFSET ") |
| sb.WriteString(q.Offset.SQL()) |
| } |
| } |
| } |
| |
| func (sel Select) SQL() string { return buildSQL(sel) } |
| func (sel Select) addSQL(sb *strings.Builder) { |
| sb.WriteString("SELECT ") |
| if sel.Distinct { |
| sb.WriteString("DISTINCT ") |
| } |
| for i, e := range sel.List { |
| if i > 0 { |
| sb.WriteString(", ") |
| } |
| e.addSQL(sb) |
| if len(sel.ListAliases) > 0 { |
| alias := sel.ListAliases[i] |
| if alias != "" { |
| sb.WriteString(" AS ") |
| sb.WriteString(alias.SQL()) |
| } |
| } |
| } |
| if len(sel.From) > 0 { |
| sb.WriteString(" FROM ") |
| for i, f := range sel.From { |
| if i > 0 { |
| sb.WriteString(", ") |
| } |
| sb.WriteString(f.SQL()) |
| } |
| } |
| if sel.Where != nil { |
| sb.WriteString(" WHERE ") |
| sel.Where.addSQL(sb) |
| } |
| if len(sel.GroupBy) > 0 { |
| sb.WriteString(" GROUP BY ") |
| addExprList(sb, sel.GroupBy, ", ") |
| } |
| } |
| |
| func (sft SelectFromTable) SQL() string { |
| str := sft.Table.SQL() |
| if len(sft.Hints) > 0 { |
| str += "@{" |
| kvs := make([]string, len(sft.Hints)) |
| i := 0 |
| for k, v := range sft.Hints { |
| kvs[i] = fmt.Sprintf("%s=%s", k, v) |
| i++ |
| } |
| sort.Strings(kvs) |
| str += strings.Join(kvs, ",") |
| str += "}" |
| } |
| |
| if sft.Alias != "" { |
| str += " AS " + sft.Alias.SQL() |
| } |
| return str |
| } |
| |
| func (sfj SelectFromJoin) SQL() string { |
| // TODO: The grammar permits arbitrary nesting. Does this need to add parens? |
| str := sfj.LHS.SQL() + " " + joinTypes[sfj.Type] + " JOIN " |
| // TODO: hints go here |
| str += sfj.RHS.SQL() |
| if sfj.On != nil { |
| str += " ON " + sfj.On.SQL() |
| } else if len(sfj.Using) > 0 { |
| str += " USING (" + idList(sfj.Using, ", ") + ")" |
| } |
| return str |
| } |
| |
| var joinTypes = map[JoinType]string{ |
| InnerJoin: "INNER", |
| CrossJoin: "CROSS", |
| FullJoin: "FULL", |
| LeftJoin: "LEFT", |
| RightJoin: "RIGHT", |
| } |
| |
| func (sfu SelectFromUnnest) SQL() string { |
| str := "UNNEST(" + sfu.Expr.SQL() + ")" |
| if sfu.Alias != "" { |
| str += " AS " + sfu.Alias.SQL() |
| } |
| return str |
| } |
| |
| func (o Order) SQL() string { return buildSQL(o) } |
| func (o Order) addSQL(sb *strings.Builder) { |
| o.Expr.addSQL(sb) |
| if o.Desc { |
| sb.WriteString(" DESC") |
| } |
| } |
| |
| var arithOps = map[ArithOperator]string{ |
| // Binary operators only; unary operators are handled first. |
| Mul: "*", |
| Div: "/", |
| Concat: "||", |
| Add: "+", |
| Sub: "-", |
| BitShl: "<<", |
| BitShr: ">>", |
| BitAnd: "&", |
| BitXor: "^", |
| BitOr: "|", |
| } |
| |
| func (ao ArithOp) SQL() string { return buildSQL(ao) } |
| func (ao ArithOp) addSQL(sb *strings.Builder) { |
| // Extra parens inserted to ensure the correct precedence. |
| |
| switch ao.Op { |
| case Neg: |
| sb.WriteString("-(") |
| ao.RHS.addSQL(sb) |
| sb.WriteString(")") |
| return |
| case Plus: |
| sb.WriteString("+(") |
| ao.RHS.addSQL(sb) |
| sb.WriteString(")") |
| return |
| case BitNot: |
| sb.WriteString("~(") |
| ao.RHS.addSQL(sb) |
| sb.WriteString(")") |
| return |
| } |
| op, ok := arithOps[ao.Op] |
| if !ok { |
| panic("unknown ArithOp") |
| } |
| sb.WriteString("(") |
| ao.LHS.addSQL(sb) |
| sb.WriteString(")") |
| sb.WriteString(op) |
| sb.WriteString("(") |
| ao.RHS.addSQL(sb) |
| sb.WriteString(")") |
| } |
| |
| func (lo LogicalOp) SQL() string { return buildSQL(lo) } |
| func (lo LogicalOp) addSQL(sb *strings.Builder) { |
| switch lo.Op { |
| default: |
| panic("unknown LogicalOp") |
| case And: |
| lo.LHS.addSQL(sb) |
| sb.WriteString(" AND ") |
| case Or: |
| lo.LHS.addSQL(sb) |
| sb.WriteString(" OR ") |
| case Not: |
| sb.WriteString("NOT ") |
| } |
| lo.RHS.addSQL(sb) |
| } |
| |
| var compOps = map[ComparisonOperator]string{ |
| Lt: "<", |
| Le: "<=", |
| Gt: ">", |
| Ge: ">=", |
| Eq: "=", |
| Ne: "!=", |
| Like: "LIKE", |
| NotLike: "NOT LIKE", |
| Between: "BETWEEN", |
| NotBetween: "NOT BETWEEN", |
| } |
| |
| func (co ComparisonOp) SQL() string { return buildSQL(co) } |
| func (co ComparisonOp) addSQL(sb *strings.Builder) { |
| op, ok := compOps[co.Op] |
| if !ok { |
| panic("unknown ComparisonOp") |
| } |
| co.LHS.addSQL(sb) |
| sb.WriteString(" ") |
| sb.WriteString(op) |
| sb.WriteString(" ") |
| co.RHS.addSQL(sb) |
| if co.Op == Between || co.Op == NotBetween { |
| sb.WriteString(" AND ") |
| co.RHS2.addSQL(sb) |
| } |
| } |
| |
| func (io InOp) SQL() string { return buildSQL(io) } |
| func (io InOp) addSQL(sb *strings.Builder) { |
| io.LHS.addSQL(sb) |
| if io.Neg { |
| sb.WriteString(" NOT") |
| } |
| sb.WriteString(" IN ") |
| if io.Unnest { |
| sb.WriteString("UNNEST") |
| } |
| sb.WriteString("(") |
| addExprList(sb, io.RHS, ", ") |
| sb.WriteString(")") |
| } |
| |
| func (io IsOp) SQL() string { return buildSQL(io) } |
| func (io IsOp) addSQL(sb *strings.Builder) { |
| io.LHS.addSQL(sb) |
| sb.WriteString(" IS ") |
| if io.Neg { |
| sb.WriteString("NOT ") |
| } |
| io.RHS.addSQL(sb) |
| } |
| |
| func (f Func) SQL() string { return buildSQL(f) } |
| func (f Func) addSQL(sb *strings.Builder) { |
| sb.WriteString(f.Name) |
| sb.WriteString("(") |
| if f.Distinct { |
| sb.WriteString("DISTINCT ") |
| } |
| addExprList(sb, f.Args, ", ") |
| switch f.NullsHandling { |
| case RespectNulls: |
| sb.WriteString(" RESPECT NULLS") |
| case IgnoreNulls: |
| sb.WriteString(" IGNORE NULLS") |
| } |
| if ah := f.Having; ah != nil { |
| sb.WriteString(" HAVING") |
| switch ah.Condition { |
| case HavingMax: |
| sb.WriteString(" MAX") |
| case HavingMin: |
| sb.WriteString(" MIN") |
| } |
| sb.WriteString(" ") |
| sb.WriteString(ah.Expr.SQL()) |
| } |
| sb.WriteString(")") |
| } |
| |
| func (te TypedExpr) SQL() string { return buildSQL(te) } |
| func (te TypedExpr) addSQL(sb *strings.Builder) { |
| te.Expr.addSQL(sb) |
| sb.WriteString(" AS ") |
| sb.WriteString(te.Type.SQL()) |
| } |
| |
| func (ee ExtractExpr) SQL() string { return buildSQL(ee) } |
| func (ee ExtractExpr) addSQL(sb *strings.Builder) { |
| sb.WriteString(ee.Part) |
| sb.WriteString(" FROM ") |
| ee.Expr.addSQL(sb) |
| } |
| |
| func (aze AtTimeZoneExpr) SQL() string { return buildSQL(aze) } |
| func (aze AtTimeZoneExpr) addSQL(sb *strings.Builder) { |
| aze.Expr.addSQL(sb) |
| sb.WriteString(" AT TIME ZONE ") |
| sb.WriteString(aze.Zone) |
| } |
| |
| func (ie IntervalExpr) SQL() string { return buildSQL(ie) } |
| func (ie IntervalExpr) addSQL(sb *strings.Builder) { |
| sb.WriteString("INTERVAL") |
| sb.WriteString(" ") |
| ie.Expr.addSQL(sb) |
| sb.WriteString(" ") |
| sb.WriteString(ie.DatePart) |
| } |
| |
| func (se SequenceExpr) SQL() string { return buildSQL(se) } |
| func (se SequenceExpr) addSQL(sb *strings.Builder) { |
| sb.WriteString("SEQUENCE ") |
| sb.WriteString(se.Name.SQL()) |
| } |
| |
| func idList(l []ID, join string) string { |
| var ss []string |
| for _, s := range l { |
| ss = append(ss, s.SQL()) |
| } |
| return strings.Join(ss, join) |
| } |
| |
| func addExprList(sb *strings.Builder, l []Expr, join string) { |
| for i, s := range l { |
| if i > 0 { |
| sb.WriteString(join) |
| } |
| s.addSQL(sb) |
| } |
| } |
| |
| func addIDList(sb *strings.Builder, l []ID, join string) { |
| for i, s := range l { |
| if i > 0 { |
| sb.WriteString(join) |
| } |
| s.addSQL(sb) |
| } |
| } |
| |
| func (pe PathExp) SQL() string { return buildSQL(pe) } |
| func (pe PathExp) addSQL(sb *strings.Builder) { |
| addIDList(sb, []ID(pe), ".") |
| } |
| |
| func (p Paren) SQL() string { return buildSQL(p) } |
| func (p Paren) addSQL(sb *strings.Builder) { |
| sb.WriteString("(") |
| p.Expr.addSQL(sb) |
| sb.WriteString(")") |
| } |
| |
| func (a Array) SQL() string { return buildSQL(a) } |
| func (a Array) addSQL(sb *strings.Builder) { |
| sb.WriteString("[") |
| addExprList(sb, []Expr(a), ", ") |
| sb.WriteString("]") |
| } |
| |
| func (id ID) SQL() string { return buildSQL(id) } |
| func (id ID) addSQL(sb *strings.Builder) { |
| // https://cloud.google.com/spanner/docs/lexical#identifiers |
| |
| // TODO: If there are non-letters/numbers/underscores then this also needs quoting. |
| |
| // Naming Convention: Must be enclosed in backticks (`) if it's a reserved keyword or contains a hyphen. |
| if IsKeyword(string(id)) || strings.Contains(string(id), "-") { |
| // TODO: Escaping may be needed here. |
| sb.WriteString("`") |
| sb.WriteString(string(id)) |
| sb.WriteString("`") |
| return |
| } |
| |
| sb.WriteString(string(id)) |
| } |
| |
| func (p Param) SQL() string { return buildSQL(p) } |
| func (p Param) addSQL(sb *strings.Builder) { |
| sb.WriteString("@") |
| sb.WriteString(string(p)) |
| } |
| |
| func (c Case) SQL() string { return buildSQL(c) } |
| func (c Case) addSQL(sb *strings.Builder) { |
| sb.WriteString("CASE ") |
| if c.Expr != nil { |
| fmt.Fprintf(sb, "%s ", c.Expr.SQL()) |
| } |
| for _, w := range c.WhenClauses { |
| fmt.Fprintf(sb, "WHEN %s THEN %s ", w.Cond.SQL(), w.Result.SQL()) |
| } |
| if c.ElseResult != nil { |
| fmt.Fprintf(sb, "ELSE %s ", c.ElseResult.SQL()) |
| } |
| sb.WriteString("END") |
| } |
| |
| func (c Coalesce) SQL() string { return buildSQL(c) } |
| func (c Coalesce) addSQL(sb *strings.Builder) { |
| sb.WriteString("COALESCE(") |
| for i, expr := range c.ExprList { |
| if i > 0 { |
| sb.WriteString(", ") |
| } |
| expr.addSQL(sb) |
| } |
| sb.WriteString(")") |
| } |
| |
| func (i If) SQL() string { return buildSQL(i) } |
| func (i If) addSQL(sb *strings.Builder) { |
| sb.WriteString("IF(") |
| i.Expr.addSQL(sb) |
| sb.WriteString(", ") |
| i.TrueResult.addSQL(sb) |
| sb.WriteString(", ") |
| i.ElseResult.addSQL(sb) |
| sb.WriteString(")") |
| } |
| |
| func (in IfNull) SQL() string { return buildSQL(in) } |
| func (in IfNull) addSQL(sb *strings.Builder) { |
| sb.WriteString("IFNULL(") |
| in.Expr.addSQL(sb) |
| sb.WriteString(", ") |
| in.NullResult.addSQL(sb) |
| sb.WriteString(")") |
| } |
| |
| func (ni NullIf) SQL() string { return buildSQL(ni) } |
| func (ni NullIf) addSQL(sb *strings.Builder) { |
| sb.WriteString("NULLIF(") |
| ni.Expr.addSQL(sb) |
| sb.WriteString(", ") |
| ni.ExprToMatch.addSQL(sb) |
| sb.WriteString(")") |
| } |
| |
| func (b BoolLiteral) SQL() string { return buildSQL(b) } |
| func (b BoolLiteral) addSQL(sb *strings.Builder) { |
| if b { |
| sb.WriteString("TRUE") |
| } else { |
| sb.WriteString("FALSE") |
| } |
| } |
| |
| func (NullLiteral) SQL() string { return buildSQL(NullLiteral(0)) } |
| func (NullLiteral) addSQL(sb *strings.Builder) { sb.WriteString("NULL") } |
| |
| func (StarExpr) SQL() string { return buildSQL(StarExpr(0)) } |
| func (StarExpr) addSQL(sb *strings.Builder) { sb.WriteString("*") } |
| |
| func (il IntegerLiteral) SQL() string { return buildSQL(il) } |
| func (il IntegerLiteral) addSQL(sb *strings.Builder) { fmt.Fprintf(sb, "%d", il) } |
| |
| func (fl FloatLiteral) SQL() string { return buildSQL(fl) } |
| func (fl FloatLiteral) addSQL(sb *strings.Builder) { fmt.Fprintf(sb, "%g", fl) } |
| |
| // TODO: provide correct string quote method and use it. |
| |
| func (sl StringLiteral) SQL() string { return buildSQL(sl) } |
| func (sl StringLiteral) addSQL(sb *strings.Builder) { fmt.Fprintf(sb, "%q", sl) } |
| |
| func (bl BytesLiteral) SQL() string { return buildSQL(bl) } |
| func (bl BytesLiteral) addSQL(sb *strings.Builder) { fmt.Fprintf(sb, "B%q", bl) } |
| |
| func (dl DateLiteral) SQL() string { return buildSQL(dl) } |
| func (dl DateLiteral) addSQL(sb *strings.Builder) { |
| fmt.Fprintf(sb, "DATE '%04d-%02d-%02d'", dl.Year, dl.Month, dl.Day) |
| } |
| |
| func (tl TimestampLiteral) SQL() string { return buildSQL(tl) } |
| func (tl TimestampLiteral) addSQL(sb *strings.Builder) { |
| fmt.Fprintf(sb, "TIMESTAMP '%s'", time.Time(tl).Format("2006-01-02 15:04:05.000000-07:00")) |
| } |
| |
| func (jl JSONLiteral) SQL() string { return buildSQL(jl) } |
| func (jl JSONLiteral) addSQL(sb *strings.Builder) { |
| fmt.Fprintf(sb, "JSON '%s'", jl) |
| } |
