mirror of
https://github.com/featurebasedb/featurebase.git
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284f62dcb9
* create function, create/drop model; re-introduced limit; added COPY; var(); corr() * review feedback
120 lines
3 KiB
Go
120 lines
3 KiB
Go
// Copyright 2022 Molecula Corp. All rights reserved.
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package planner
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import (
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"context"
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"github.com/featurebasedb/featurebase/v3/dax"
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"github.com/featurebasedb/featurebase/v3/sql3"
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"github.com/featurebasedb/featurebase/v3/sql3/parser"
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"github.com/featurebasedb/featurebase/v3/sql3/planner/types"
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)
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// compileCopyStatement compiles a parser.CopyStatement AST into a PlanOperator
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func (p *ExecutionPlanner) compileCopyStatement(stmt *parser.CopyStatement) (types.PlanOperator, error) {
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query := NewPlanOpQuery(p, NewPlanOpNullTable(), p.sql)
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query.AddWarning("🦖 here there be dragons! COPY statement is experimental.")
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// handle projections
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projections := make([]types.PlanExpression, 0)
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for _, c := range stmt.Source.PossibleOutputColumns() {
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expr := &parser.QualifiedRef{
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Table: &parser.Ident{Name: c.TableName},
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Column: &parser.Ident{Name: c.ColumnName},
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ColumnIndex: c.ColumnIndex,
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RefDataType: c.Datatype,
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}
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planExpr, err := p.compileExpr(expr)
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if err != nil {
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return nil, err
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}
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projections = append(projections, planExpr)
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}
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// handle the where clause
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where, err := p.compileExpr(stmt.WhereExpr)
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if err != nil {
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return nil, err
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}
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// compile source
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source, err := p.compileSource(query, stmt.Source)
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if err != nil {
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return nil, err
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}
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// if we did have a where, insert the filter op
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if where != nil {
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source = NewPlanOpFilter(p, where, source)
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}
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var compiledOp types.PlanOperator
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url := ""
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apiKey := ""
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if stmt.Url != nil {
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lit, ok := stmt.Url.(*parser.StringLit)
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if !ok {
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return nil, sql3.NewErrStringLiteral(stmt.Url.Pos().Line, stmt.Url.Pos().Column)
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}
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url = lit.Value
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}
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if stmt.ApiKey != nil {
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lit, ok := stmt.ApiKey.(*parser.StringLit)
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if !ok {
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return nil, sql3.NewErrStringLiteral(stmt.ApiKey.Pos().Line, stmt.ApiKey.Pos().Column)
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}
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apiKey = lit.Value
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}
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// get the source table
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tname := dax.TableName(stmt.Source.String())
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tbl, err := p.schemaAPI.TableByName(context.Background(), tname)
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if err != nil {
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if isTableNotFoundError(err) {
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return nil, sql3.NewErrTableNotFound(0, 0, stmt.Source.String())
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}
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return nil, err
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}
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// get the ddl of source table and subst target table name
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ddl := generateTableDDL(tbl, stmt.TargetName.Name)
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compiledOp = NewPlanOpCopy(p, stmt.TargetName.Name, url, apiKey, ddl, NewPlanOpProjection(projections, source))
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children := []types.PlanOperator{
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compiledOp,
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}
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return query.WithChildren(children...)
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}
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func (p *ExecutionPlanner) analyzeCopyStatement(ctx context.Context, stmt *parser.CopyStatement) error {
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// analyze source
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var err error
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source, err := p.analyzeSource(ctx, stmt.Source, stmt)
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if err != nil {
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return err
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}
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stmt.Source = source
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// analyze where
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expr, err := p.analyzeExpression(ctx, stmt.WhereExpr, stmt)
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if err != nil {
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return err
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}
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stmt.WhereExpr = expr
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expr, err = p.analyzeExpression(ctx, stmt.Url, stmt)
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if err != nil {
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return err
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}
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stmt.Url = expr
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expr, err = p.analyzeExpression(ctx, stmt.ApiKey, stmt)
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if err != nil {
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return err
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}
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stmt.ApiKey = expr
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return nil
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}
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