withddl

package
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Published: Jul 28, 2020 License: Apache-2.0 Imports: 6 Imported by: 0

Documentation

Overview

Package withddl allows you to automatically ensure the tables against which you want to apply statements are up-to-date.

Index

Constants

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Variables

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Functions

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Types

type WithDDL

type WithDDL struct {
	// contains filtered or unexported fields
}

WithDDL allows you to execute statements against tables whose schema may not be up-to-date. If the tables don't exist or result in a schema error, it can apply a series of idempotent DDLs that will create or bring the tables to the desired state and retry.

func New

func New(ddls []string) *WithDDL

New creates a new WithDDL.

func (*WithDDL) Exec

func (wd *WithDDL) Exec(ctx context.Context, query string, f interface{}) (*sqltypes.Result, error)

Exec executes the query using the supplied function. If there are any schema errors, it applies the DDLs and retries. Funcs can be any of these types: func(query string) (*sqltypes.Result, error) func(query string, maxrows int) (*sqltypes.Result, error) func(query string, maxrows int, wantfields bool) (*sqltypes.Result, error) func(ctx context.Context, query string, maxrows int, wantfields bool) (*sqltypes.Result, error)

func (*WithDDL) ExecIgnore

func (wd *WithDDL) ExecIgnore(ctx context.Context, query string, f interface{}) (*sqltypes.Result, error)

ExecIgnore executes the query using the supplied function. If there are any schema errors, it returns an empty result.

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