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546 lines
22 KiB
Go
546 lines
22 KiB
Go
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package gdb provides ORM features for popular relationship databases.
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package gdb
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import (
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"context"
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"database/sql"
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"fmt"
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"github.com/gogf/gf/errors/gerror"
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"github.com/gogf/gf/os/gcmd"
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"time"
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"github.com/gogf/gf/container/gvar"
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"github.com/gogf/gf/internal/intlog"
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"github.com/gogf/gf/os/glog"
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"github.com/gogf/gf/container/gmap"
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"github.com/gogf/gf/container/gtype"
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"github.com/gogf/gf/os/gcache"
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"github.com/gogf/gf/util/grand"
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)
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// DB defines the interfaces for ORM operations.
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type DB interface {
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// ===========================================================================
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// Model creation.
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// ===========================================================================
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// Table function is deprecated, use Model instead.
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// The DB interface is designed not only for
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// relational databases but also for NoSQL databases in the future. The name
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// "Table" is not proper for that purpose any more.
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// Also see Core.Table.
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Table(tableNameOrStruct ...interface{}) *Model
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// Model creates and returns a new ORM model from given schema.
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// The parameter `table` can be more than one table names, and also alias name, like:
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// 1. Model names:
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// Model("user")
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// Model("user u")
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// Model("user, user_detail")
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// Model("user u, user_detail ud")
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// 2. Model name with alias: Model("user", "u")
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// Also see Core.Model.
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Model(tableNameOrStruct ...interface{}) *Model
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// Schema creates and returns a schema.
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// Also see Core.Schema.
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Schema(schema string) *Schema
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// With creates and returns an ORM model based on meta data of given object.
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// Also see Core.With.
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With(objects ...interface{}) *Model
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// Open creates a raw connection object for database with given node configuration.
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// Note that it is not recommended using the this function manually.
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// Also see DriverMysql.Open.
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Open(config *ConfigNode) (*sql.DB, error)
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// Ctx is a chaining function, which creates and returns a new DB that is a shallow copy
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// of current DB object and with given context in it.
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// Note that this returned DB object can be used only once, so do not assign it to
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// a global or package variable for long using.
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// Also see Core.Ctx.
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Ctx(ctx context.Context) DB
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// ===========================================================================
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// Query APIs.
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// ===========================================================================
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Query(sql string, args ...interface{}) (*sql.Rows, error) // See Core.Query.
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Exec(sql string, args ...interface{}) (sql.Result, error) // See Core.Exec.
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Prepare(sql string, execOnMaster ...bool) (*Stmt, error) // See Core.Prepare.
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// ===========================================================================
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// Common APIs for CURD.
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// ===========================================================================
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Insert(table string, data interface{}, batch ...int) (sql.Result, error) // See Core.Insert.
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InsertIgnore(table string, data interface{}, batch ...int) (sql.Result, error) // See Core.InsertIgnore.
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Replace(table string, data interface{}, batch ...int) (sql.Result, error) // See Core.Replace.
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Save(table string, data interface{}, batch ...int) (sql.Result, error) // See Core.Save.
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BatchInsert(table string, list interface{}, batch ...int) (sql.Result, error) // See Core.BatchInsert.
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BatchReplace(table string, list interface{}, batch ...int) (sql.Result, error) // See Core.BatchReplace.
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BatchSave(table string, list interface{}, batch ...int) (sql.Result, error) // See Core.BatchSave.
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Update(table string, data interface{}, condition interface{}, args ...interface{}) (sql.Result, error) // See Core.Update.
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Delete(table string, condition interface{}, args ...interface{}) (sql.Result, error) // See Core.Delete.
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// ===========================================================================
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// Internal APIs for CURD, which can be overwrote for custom CURD implements.
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// ===========================================================================
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DoQuery(link Link, sql string, args ...interface{}) (rows *sql.Rows, err error) // See Core.DoQuery.
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DoGetAll(link Link, sql string, args ...interface{}) (result Result, err error) // See Core.DoGetAll.
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DoExec(link Link, sql string, args ...interface{}) (result sql.Result, err error) // See Core.DoExec.
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DoPrepare(link Link, sql string) (*Stmt, error) // See Core.DoPrepare.
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DoInsert(link Link, table string, data interface{}, option int, batch ...int) (result sql.Result, err error) // See Core.DoInsert.
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DoBatchInsert(link Link, table string, list interface{}, option int, batch ...int) (result sql.Result, err error) // See Core.DoBatchInsert.
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DoUpdate(link Link, table string, data interface{}, condition string, args ...interface{}) (result sql.Result, err error) // See Core.DoUpdate.
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DoDelete(link Link, table string, condition string, args ...interface{}) (result sql.Result, err error) // See Core.DoDelete.
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// ===========================================================================
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// Query APIs for convenience purpose.
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// ===========================================================================
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GetAll(sql string, args ...interface{}) (Result, error) // See Core.GetAll.
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GetOne(sql string, args ...interface{}) (Record, error) // See Core.GetOne.
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GetValue(sql string, args ...interface{}) (Value, error) // See Core.GetValue.
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GetArray(sql string, args ...interface{}) ([]Value, error) // See Core.GetArray.
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GetCount(sql string, args ...interface{}) (int, error) // See Core.GetCount.
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GetStruct(objPointer interface{}, sql string, args ...interface{}) error // See Core.GetStruct.
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GetStructs(objPointerSlice interface{}, sql string, args ...interface{}) error // See Core.GetStructs.
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GetScan(objPointer interface{}, sql string, args ...interface{}) error // See Core.GetScan.
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// ===========================================================================
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// Master/Slave specification support.
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// ===========================================================================
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Master() (*sql.DB, error) // See Core.Master.
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Slave() (*sql.DB, error) // See Core.Slave.
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// ===========================================================================
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// Ping-Pong.
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// ===========================================================================
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PingMaster() error // See Core.PingMaster.
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PingSlave() error // See Core.PingSlave.
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// ===========================================================================
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// Transaction.
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// ===========================================================================
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Begin() (*TX, error) // See Core.Begin.
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Transaction(f func(tx *TX) error) (err error) // See Core.Transaction.
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// ===========================================================================
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// Configuration methods.
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// ===========================================================================
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GetCache() *gcache.Cache // See Core.GetCache.
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SetDebug(debug bool) // See Core.SetDebug.
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GetDebug() bool // See Core.GetDebug.
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SetSchema(schema string) // See Core.SetSchema.
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GetSchema() string // See Core.GetSchema.
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GetPrefix() string // See Core.GetPrefix.
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GetGroup() string // See Core.GetGroup.
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SetDryRun(enabled bool) // See Core.SetDryRun.
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GetDryRun() bool // See Core.GetDryRun.
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SetLogger(logger *glog.Logger) // See Core.SetLogger.
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GetLogger() *glog.Logger // See Core.GetLogger.
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GetConfig() *ConfigNode // See Core.GetConfig.
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SetMaxIdleConnCount(n int) // See Core.SetMaxIdleConnCount.
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SetMaxOpenConnCount(n int) // See Core.SetMaxOpenConnCount.
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SetMaxConnLifeTime(d time.Duration) // See Core.SetMaxConnLifeTime.
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// ===========================================================================
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// Utility methods.
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// ===========================================================================
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GetCtx() context.Context // See Core.GetCtx.
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GetChars() (charLeft string, charRight string) // See Core.GetChars.
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GetMaster(schema ...string) (*sql.DB, error) // See Core.GetMaster.
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GetSlave(schema ...string) (*sql.DB, error) // See Core.GetSlave.
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QuoteWord(s string) string // See Core.QuoteWord.
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QuoteString(s string) string // See Core.QuoteString.
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QuotePrefixTableName(table string) string // See Core.QuotePrefixTableName.
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Tables(schema ...string) (tables []string, err error) // See Core.Tables.
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TableFields(link Link, table string, schema ...string) (map[string]*TableField, error) // See Core.TableFields.
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HasTable(name string) (bool, error) // See Core.HasTable.
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FilteredLinkInfo() string // See Core.FilteredLinkInfo.
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// HandleSqlBeforeCommit is a hook function, which deals with the sql string before
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// it's committed to underlying driver. The parameter `link` specifies the current
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// database connection operation object. You can modify the sql string `sql` and its
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// arguments `args` as you wish before they're committed to driver.
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// Also see Core.HandleSqlBeforeCommit.
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HandleSqlBeforeCommit(link Link, sql string, args []interface{}) (string, []interface{})
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// ===========================================================================
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// Internal methods, for internal usage purpose, you do not need consider it.
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// ===========================================================================
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mappingAndFilterData(schema, table string, data map[string]interface{}, filter bool) (map[string]interface{}, error) // See Core.mappingAndFilterData.
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convertFieldValueToLocalValue(fieldValue interface{}, fieldType string) interface{} // See Core.convertFieldValueToLocalValue.
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convertRowsToResult(rows *sql.Rows) (Result, error) // See Core.convertRowsToResult.
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addSqlToTracing(ctx context.Context, sql *Sql) // See Core.addSqlToTracing.
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writeSqlToLogger(v *Sql) // See Core.writeSqlToLogger.
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}
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// Core is the base struct for database management.
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type Core struct {
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db DB // DB interface object.
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ctx context.Context // Context for chaining operation only.
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group string // Configuration group name.
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debug *gtype.Bool // Enable debug mode for the database, which can be changed in runtime.
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cache *gcache.Cache // Cache manager, SQL result cache only.
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schema *gtype.String // Custom schema for this object.
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logger *glog.Logger // Logger.
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config *ConfigNode // Current config node.
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}
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// Driver is the interface for integrating sql drivers into package gdb.
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type Driver interface {
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// New creates and returns a database object for specified database server.
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New(core *Core, node *ConfigNode) (DB, error)
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}
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// Sql is the sql recording struct.
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type Sql struct {
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Sql string // SQL string(may contain reserved char '?').
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Type string // SQL operation type.
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Args []interface{} // Arguments for this sql.
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Format string // Formatted sql which contains arguments in the sql.
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Error error // Execution result.
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Start int64 // Start execution timestamp in milliseconds.
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End int64 // End execution timestamp in milliseconds.
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Group string // Group is the group name of the configuration that the sql is executed from.
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}
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// TableField is the struct for table field.
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type TableField struct {
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Index int // For ordering purpose as map is unordered.
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Name string // Field name.
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Type string // Field type.
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Null bool // Field can be null or not.
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Key string // The index information(empty if it's not a index).
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Default interface{} // Default value for the field.
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Extra string // Extra information.
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Comment string // Comment.
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}
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// Link is a common database function wrapper interface.
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type Link interface {
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Query(sql string, args ...interface{}) (*sql.Rows, error)
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Exec(sql string, args ...interface{}) (sql.Result, error)
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Prepare(sql string) (*sql.Stmt, error)
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QueryContext(ctx context.Context, sql string, args ...interface{}) (*sql.Rows, error)
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ExecContext(ctx context.Context, sql string, args ...interface{}) (sql.Result, error)
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PrepareContext(ctx context.Context, sql string) (*sql.Stmt, error)
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}
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// Counter is the type for update count.
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type Counter struct {
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Field string
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Value float64
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}
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type (
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Raw string // Raw is a raw sql that will not be treated as argument but as a direct sql part.
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Value = *gvar.Var // Value is the field value type.
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Record map[string]Value // Record is the row record of the table.
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Result []Record // Result is the row record array.
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Map = map[string]interface{} // Map is alias of map[string]interface{}, which is the most common usage map type.
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List = []Map // List is type of map array.
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)
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const (
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insertOptionDefault = 0
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insertOptionReplace = 1
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insertOptionSave = 2
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insertOptionIgnore = 3
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defaultBatchNumber = 10 // Per count for batch insert/replace/save.
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defaultMaxIdleConnCount = 10 // Max idle connection count in pool.
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defaultMaxOpenConnCount = 100 // Max open connection count in pool.
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defaultMaxConnLifeTime = 30 * time.Second // Max life time for per connection in pool in seconds.
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ctxTimeoutTypeExec = iota
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ctxTimeoutTypeQuery
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ctxTimeoutTypePrepare
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)
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var (
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// ErrNoRows is alias of sql.ErrNoRows.
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ErrNoRows = sql.ErrNoRows
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// instances is the management map for instances.
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instances = gmap.NewStrAnyMap(true)
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// driverMap manages all custom registered driver.
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driverMap = map[string]Driver{
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"mysql": &DriverMysql{},
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"mssql": &DriverMssql{},
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"pgsql": &DriverPgsql{},
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"oracle": &DriverOracle{},
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"sqlite": &DriverSqlite{},
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}
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// lastOperatorRegPattern is the regular expression pattern for a string
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// which has operator at its tail.
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lastOperatorRegPattern = `[<>=]+\s*$`
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// regularFieldNameRegPattern is the regular expression pattern for a string
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// which is a regular field name of table.
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regularFieldNameRegPattern = `^[\w\.\-\_]+$`
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// regularFieldNameWithoutDotRegPattern is similar to regularFieldNameRegPattern but not allows '.'.
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// Note that, although some databases allow char '.' in the field name, but it here does not allow '.'
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// in the field name as it conflicts with "db.table.field" pattern in SOME situations.
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regularFieldNameWithoutDotRegPattern = `^[\w\-\_]+$`
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// internalCache is the memory cache for internal usage.
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internalCache = gcache.New()
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// tableFieldsMap caches the table information retrived from database.
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tableFieldsMap = gmap.New(true)
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// allDryRun sets dry-run feature for all database connections.
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// It is commonly used for command options for convenience.
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allDryRun = false
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)
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func init() {
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// allDryRun is initialized from environment or command options.
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allDryRun = gcmd.GetOptWithEnv("gf.gdb.dryrun", false).Bool()
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}
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// Register registers custom database driver to gdb.
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func Register(name string, driver Driver) error {
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driverMap[name] = driver
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return nil
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}
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// New creates and returns an ORM object with global configurations.
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// The parameter `name` specifies the configuration group name,
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// which is DefaultGroupName in default.
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func New(group ...string) (db DB, err error) {
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groupName := configs.group
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if len(group) > 0 && group[0] != "" {
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groupName = group[0]
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}
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configs.RLock()
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defer configs.RUnlock()
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if len(configs.config) < 1 {
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return nil, gerror.New("database configuration is empty, please set the database configuration before using")
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}
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if _, ok := configs.config[groupName]; ok {
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if node, err := getConfigNodeByGroup(groupName, true); err == nil {
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c := &Core{
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group: groupName,
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debug: gtype.NewBool(),
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cache: gcache.New(),
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schema: gtype.NewString(),
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logger: glog.New(),
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config: node,
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}
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if v, ok := driverMap[node.Type]; ok {
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c.db, err = v.New(c, node)
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if err != nil {
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return nil, err
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}
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return c.db, nil
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} else {
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return nil, gerror.Newf(
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`cannot find database driver for specified database type "%s", did you misspell type name "%s" or forget importing the database driver?`,
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node.Type, node.Type,
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)
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}
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} else {
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return nil, err
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}
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} else {
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return nil, gerror.Newf(
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`database configuration node "%s" is not found, did you misspell group name "%s" or miss the database configuration?`,
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groupName, groupName,
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)
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}
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}
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// Instance returns an instance for DB operations.
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// The parameter `name` specifies the configuration group name,
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// which is DefaultGroupName in default.
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func Instance(name ...string) (db DB, err error) {
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group := configs.group
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if len(name) > 0 && name[0] != "" {
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group = name[0]
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}
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v := instances.GetOrSetFuncLock(group, func() interface{} {
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db, err = New(group)
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return db
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})
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if v != nil {
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return v.(DB), nil
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}
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return
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}
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// getConfigNodeByGroup calculates and returns a configuration node of given group. It
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// calculates the value internally using weight algorithm for load balance.
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//
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// The parameter `master` specifies whether retrieving a master node, or else a slave node
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// if master-slave configured.
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func getConfigNodeByGroup(group string, master bool) (*ConfigNode, error) {
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if list, ok := configs.config[group]; ok {
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// Separates master and slave configuration nodes array.
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masterList := make(ConfigGroup, 0)
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slaveList := make(ConfigGroup, 0)
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for i := 0; i < len(list); i++ {
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if list[i].Role == "slave" {
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slaveList = append(slaveList, list[i])
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} else {
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masterList = append(masterList, list[i])
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}
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}
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if len(masterList) < 1 {
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return nil, gerror.New("at least one master node configuration's need to make sense")
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}
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if len(slaveList) < 1 {
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slaveList = masterList
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}
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if master {
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return getConfigNodeByWeight(masterList), nil
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} else {
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return getConfigNodeByWeight(slaveList), nil
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}
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} else {
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return nil, gerror.New(fmt.Sprintf("empty database configuration for item name '%s'", group))
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}
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}
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// getConfigNodeByWeight calculates the configuration weights and randomly returns a node.
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//
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// Calculation algorithm brief:
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// 1. If we have 2 nodes, and their weights are both 1, then the weight range is [0, 199];
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// 2. Node1 weight range is [0, 99], and node2 weight range is [100, 199], ratio is 1:1;
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// 3. If the random number is 99, it then chooses and returns node1;
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func getConfigNodeByWeight(cg ConfigGroup) *ConfigNode {
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if len(cg) < 2 {
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return &cg[0]
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}
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var total int
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for i := 0; i < len(cg); i++ {
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total += cg[i].Weight * 100
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}
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// If total is 0 means all of the nodes have no weight attribute configured.
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// It then defaults each node's weight attribute to 1.
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if total == 0 {
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for i := 0; i < len(cg); i++ {
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cg[i].Weight = 1
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total += cg[i].Weight * 100
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}
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}
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// Exclude the right border value.
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r := grand.N(0, total-1)
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min := 0
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max := 0
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for i := 0; i < len(cg); i++ {
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max = min + cg[i].Weight*100
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//fmt.Printf("r: %d, min: %d, max: %d\n", r, min, max)
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if r >= min && r < max {
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return &cg[i]
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} else {
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min = max
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}
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}
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return nil
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}
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// getSqlDb retrieves and returns a underlying database connection object.
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// The parameter `master` specifies whether retrieves master node connection if
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// master-slave nodes are configured.
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func (c *Core) getSqlDb(master bool, schema ...string) (sqlDb *sql.DB, err error) {
|
|
// Load balance.
|
|
node, err := getConfigNodeByGroup(c.group, master)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// Default value checks.
|
|
if node.Charset == "" {
|
|
node.Charset = "utf8"
|
|
}
|
|
// Changes the schema.
|
|
nodeSchema := c.schema.Val()
|
|
if len(schema) > 0 && schema[0] != "" {
|
|
nodeSchema = schema[0]
|
|
}
|
|
if nodeSchema != "" {
|
|
// Value copy.
|
|
n := *node
|
|
n.Name = nodeSchema
|
|
node = &n
|
|
}
|
|
// Cache the underlying connection pool object by node.
|
|
v, _ := internalCache.GetOrSetFuncLock(node.String(), func() (interface{}, error) {
|
|
intlog.Printf(
|
|
`open new connection, master:%#v, config:%#v, node:%#v`,
|
|
master, c.config, node,
|
|
)
|
|
defer func() {
|
|
if err != nil {
|
|
intlog.Printf(`open new connection failed: %v, %#v`, err, node)
|
|
} else {
|
|
intlog.Printf(
|
|
`open new connection success, master:%#v, config:%#v, node:%#v`,
|
|
master, c.config, node,
|
|
)
|
|
}
|
|
}()
|
|
|
|
sqlDb, err = c.db.Open(node)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if c.config.MaxIdleConnCount > 0 {
|
|
sqlDb.SetMaxIdleConns(c.config.MaxIdleConnCount)
|
|
} else {
|
|
sqlDb.SetMaxIdleConns(defaultMaxIdleConnCount)
|
|
}
|
|
if c.config.MaxOpenConnCount > 0 {
|
|
sqlDb.SetMaxOpenConns(c.config.MaxOpenConnCount)
|
|
} else {
|
|
sqlDb.SetMaxOpenConns(defaultMaxOpenConnCount)
|
|
}
|
|
if c.config.MaxConnLifeTime > 0 {
|
|
// Automatically checks whether MaxConnLifetime is configured using string like: "30s", "60s", etc.
|
|
// Or else it is configured just using number, which means value in seconds.
|
|
if c.config.MaxConnLifeTime > time.Second {
|
|
sqlDb.SetConnMaxLifetime(c.config.MaxConnLifeTime)
|
|
} else {
|
|
sqlDb.SetConnMaxLifetime(c.config.MaxConnLifeTime * time.Second)
|
|
}
|
|
} else {
|
|
sqlDb.SetConnMaxLifetime(defaultMaxConnLifeTime)
|
|
}
|
|
return sqlDb, nil
|
|
}, 0)
|
|
if v != nil && sqlDb == nil {
|
|
sqlDb = v.(*sql.DB)
|
|
}
|
|
if node.Debug {
|
|
c.db.SetDebug(node.Debug)
|
|
}
|
|
if node.DryRun {
|
|
c.db.SetDryRun(node.DryRun)
|
|
}
|
|
return
|
|
}
|