wehub-resource-sync
137 lines
4.1 KiB
Go
137 lines
4.1 KiB
Go
// Copyright 2025 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package node
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import (
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"context"
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"github.com/cockroachdb/errors"
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/go-mysql-server/sql/plan"
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vitess "github.com/dolthub/vitess/go/vt/sqlparser"
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"github.com/dolthub/doltgresql/core"
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pgexprs "github.com/dolthub/doltgresql/server/expression"
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"github.com/dolthub/doltgresql/server/functions/framework"
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)
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// Call is used to call stored procedures.
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type Call struct {
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SchemaName string
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ProcedureName string
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Exprs []sql.Expression
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Runner pgexprs.StatementRunner
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cachedSch sql.Schema
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originalExprs vitess.Exprs
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CompiledFunc *framework.CompiledFunction
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}
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var _ sql.ExecSourceRel = (*Call)(nil)
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var _ sql.Expressioner = (*Call)(nil)
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var _ vitess.Injectable = (*Call)(nil)
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// NewCall returns a new *Call.
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func NewCall(schema string, name string, originalExprs vitess.Exprs) *Call {
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return &Call{
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SchemaName: schema,
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ProcedureName: name,
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Exprs: nil,
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originalExprs: originalExprs,
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}
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}
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// Children implements the interface sql.ExecSourceRel.
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func (c *Call) Children() []sql.Node {
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return nil
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}
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// Expressions implements the interface sql.Expressioner.
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func (c *Call) Expressions() []sql.Expression {
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exprs := make([]sql.Expression, len(c.Exprs)+1)
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exprs[0] = c.Runner
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copy(exprs[1:], c.Exprs)
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return exprs
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}
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// IsReadOnly implements the interface sql.ExecSourceRel.
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func (c *Call) IsReadOnly() bool {
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// TODO: some procedures are read-only, some are not
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return false
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}
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// Resolved implements the interface sql.ExecSourceRel.
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func (c *Call) Resolved() bool {
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return true
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}
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// RowIter implements the interface sql.ExecSourceRel.
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func (c *Call) RowIter(ctx *sql.Context, r sql.Row) (sql.RowIter, error) {
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if c.CompiledFunc == nil || !c.CompiledFunc.Resolved() {
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return nil, errors.New("cannot call unresolved procedure")
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}
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if !core.IsContextValid(ctx) {
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return nil, errors.New("invalid context while attempting to call a procedure")
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}
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cf := c.CompiledFunc.SetStatementRunner(ctx, c.Runner.Runner).(*framework.CompiledFunction)
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_, err := cf.Eval(ctx, nil)
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if err != nil {
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return nil, err
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}
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return sql.RowsToRowIter(), nil
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}
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// Schema implements the interface sql.ExecSourceRel.
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func (c *Call) Schema(ctx *sql.Context) sql.Schema {
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// TODO: this should be the INOUT and OUT parameters of the target procedure assuming we're not using the cached schema
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return c.cachedSch
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}
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// String implements the interface sql.ExecSourceRel.
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func (c *Call) String() string {
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return "CALL"
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}
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// WithChildren implements the interface sql.ExecSourceRel.
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func (c *Call) WithChildren(ctx *sql.Context, children ...sql.Node) (sql.Node, error) {
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return plan.NillaryWithChildren(c, children...)
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}
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// WithExpressions implements the interface sql.Expressioner.
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func (c *Call) WithExpressions(ctx *sql.Context, exprs ...sql.Expression) (sql.Node, error) {
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if len(c.Exprs)+1 != len(exprs) {
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return nil, errors.Errorf("expected `%d` child expressions but received `%d`", len(c.Exprs), len(exprs))
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}
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nc := *c
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nc.Runner = exprs[0].(pgexprs.StatementRunner)
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nc.Exprs = exprs[1:]
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return &nc, nil
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}
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// WithResolvedChildren implements the interface vitess.Injectable.
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func (c *Call) WithResolvedChildren(ctx context.Context, children []any) (any, error) {
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resolvedChildren := make([]sql.Expression, len(children))
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for i, child := range children {
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var ok bool
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resolvedChildren[i], ok = child.(sql.Expression)
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if !ok {
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return nil, errors.Errorf("expected vitess child to be an expression but has type `%T`", child)
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}
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}
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nc := *c
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nc.Exprs = resolvedChildren
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return &nc, nil
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}
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