Documentation
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Overview ¶
Package planbuilder allows you to build execution plans that describe how to fulfill a query that may span multiple keyspaces or shards. The main entry points for this package are Build and BuildFromStmt.
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func Build ¶
func Build(query string, vschema ContextVSchema) (*engine.Plan, error)
Build builds a plan for a query based on the specified vschema. It's the main entry point for this package.
func BuildFromStmt ¶
func BuildFromStmt(query string, stmt sqlparser.Statement, vschema ContextVSchema) (*engine.Plan, error)
BuildFromStmt builds a plan based on the AST provided. TODO(sougou): The query input is trusted as the source of the AST. Maybe this function just returns instructions and engine.Plan can be built by the caller.
Types ¶
type ContextVSchema ¶
type ContextVSchema interface {
FindTable(tablename sqlparser.TableName) (*vindexes.Table, string, topodatapb.TabletType, key.Destination, error)
FindTablesOrVindex(tablename sqlparser.TableName) ([]*vindexes.Table, vindexes.Vindex, string, topodatapb.TabletType, key.Destination, error)
DefaultKeyspace() (*vindexes.Keyspace, error)
TargetString() string
}
ContextVSchema defines the interface for this package to fetch info about tables.
Source Files
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