operator/statement/
tql.rs

1// Copyright 2023 Greptime Team
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use std::collections::HashMap;
16
17use common_query::Output;
18use common_telemetry::tracing;
19use datafusion_expr::LogicalPlan;
20use query::parser::{
21    PromQuery, QueryLanguageParser, ANALYZE_NODE_NAME, ANALYZE_VERBOSE_NODE_NAME,
22    DEFAULT_LOOKBACK_STRING, EXPLAIN_NODE_NAME, EXPLAIN_VERBOSE_NODE_NAME,
23};
24use session::context::QueryContextRef;
25use snafu::ResultExt;
26use sql::statements::tql::Tql;
27
28use crate::error::{ExecLogicalPlanSnafu, ParseQuerySnafu, PlanStatementSnafu, Result};
29use crate::statement::StatementExecutor;
30
31impl StatementExecutor {
32    /// Plan the given [Tql] query and return the [LogicalPlan].
33    #[tracing::instrument(skip_all)]
34    pub async fn plan_tql(&self, tql: Tql, query_ctx: &QueryContextRef) -> Result<LogicalPlan> {
35        let stmt = match tql {
36            Tql::Eval(eval) => {
37                let promql = PromQuery {
38                    start: eval.start,
39                    end: eval.end,
40                    step: eval.step,
41                    query: eval.query,
42                    lookback: eval
43                        .lookback
44                        .unwrap_or_else(|| DEFAULT_LOOKBACK_STRING.to_string()),
45                };
46                QueryLanguageParser::parse_promql(&promql, query_ctx).context(ParseQuerySnafu)?
47            }
48            Tql::Explain(explain) => {
49                if let Some(format) = &explain.format {
50                    query_ctx.set_explain_format(format.to_string());
51                }
52
53                let promql = PromQuery {
54                    query: explain.query,
55                    lookback: explain
56                        .lookback
57                        .unwrap_or_else(|| DEFAULT_LOOKBACK_STRING.to_string()),
58                    ..PromQuery::default()
59                };
60                let explain_node_name = if explain.is_verbose {
61                    EXPLAIN_VERBOSE_NODE_NAME
62                } else {
63                    EXPLAIN_NODE_NAME
64                }
65                .to_string();
66                let params = HashMap::from([("name".to_string(), explain_node_name)]);
67                QueryLanguageParser::parse_promql(&promql, query_ctx)
68                    .context(ParseQuerySnafu)?
69                    .post_process(params)
70                    .unwrap()
71            }
72            Tql::Analyze(analyze) => {
73                if let Some(format) = &analyze.format {
74                    query_ctx.set_explain_format(format.to_string());
75                }
76
77                let promql = PromQuery {
78                    start: analyze.start,
79                    end: analyze.end,
80                    step: analyze.step,
81                    query: analyze.query,
82                    lookback: analyze
83                        .lookback
84                        .unwrap_or_else(|| DEFAULT_LOOKBACK_STRING.to_string()),
85                };
86                let analyze_node_name = if analyze.is_verbose {
87                    ANALYZE_VERBOSE_NODE_NAME
88                } else {
89                    ANALYZE_NODE_NAME
90                }
91                .to_string();
92                let params = HashMap::from([("name".to_string(), analyze_node_name)]);
93                QueryLanguageParser::parse_promql(&promql, query_ctx)
94                    .context(ParseQuerySnafu)?
95                    .post_process(params)
96                    .unwrap()
97            }
98        };
99        self.query_engine
100            .planner()
101            .plan(&stmt, query_ctx.clone())
102            .await
103            .context(PlanStatementSnafu)
104    }
105
106    /// Execute the given [Tql] query and return the result.
107    #[tracing::instrument(skip_all)]
108    pub(super) async fn execute_tql(&self, tql: Tql, query_ctx: QueryContextRef) -> Result<Output> {
109        let plan = self.plan_tql(tql, &query_ctx).await?;
110        self.query_engine
111            .execute(plan, query_ctx)
112            .await
113            .context(ExecLogicalPlanSnafu)
114    }
115}
operator/statement/tql.rs

operator/statement/
tql.rs
