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    ANALYZE_NODE_NAME, ANALYZE_VERBOSE_NODE_NAME, DEFAULT_LOOKBACK_STRING, EXPLAIN_NODE_NAME,
22    EXPLAIN_VERBOSE_NODE_NAME, PromQuery, QueryLanguageParser,
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                    alias: eval.alias,
46                };
47                QueryLanguageParser::parse_promql(&promql, query_ctx).context(ParseQuerySnafu)?
48            }
49            Tql::Explain(explain) => {
50                if let Some(format) = &explain.format {
51                    query_ctx.set_explain_format(format.to_string());
52                }
53
54                let promql = PromQuery {
55                    query: explain.query,
56                    lookback: explain
57                        .lookback
58                        .unwrap_or_else(|| DEFAULT_LOOKBACK_STRING.to_string()),
59                    ..PromQuery::default()
60                };
61                let explain_node_name = if explain.is_verbose {
62                    EXPLAIN_VERBOSE_NODE_NAME
63                } else {
64                    EXPLAIN_NODE_NAME
65                }
66                .to_string();
67                let params = HashMap::from([("name".to_string(), explain_node_name)]);
68                QueryLanguageParser::parse_promql(&promql, query_ctx)
69                    .context(ParseQuerySnafu)?
70                    .post_process(params)
71                    .unwrap()
72            }
73            Tql::Analyze(analyze) => {
74                if let Some(format) = &analyze.format {
75                    query_ctx.set_explain_format(format.to_string());
76                }
77
78                let promql = PromQuery {
79                    start: analyze.start,
80                    end: analyze.end,
81                    step: analyze.step,
82                    query: analyze.query,
83                    lookback: analyze
84                        .lookback
85                        .unwrap_or_else(|| DEFAULT_LOOKBACK_STRING.to_string()),
86                    alias: analyze.alias,
87                };
88                let analyze_node_name = if analyze.is_verbose {
89                    ANALYZE_VERBOSE_NODE_NAME
90                } else {
91                    ANALYZE_NODE_NAME
92                }
93                .to_string();
94                let params = HashMap::from([("name".to_string(), analyze_node_name)]);
95                QueryLanguageParser::parse_promql(&promql, query_ctx)
96                    .context(ParseQuerySnafu)?
97                    .post_process(params)
98                    .unwrap()
99            }
100        };
101        self.query_engine
102            .planner()
103            .plan(&stmt, query_ctx.clone())
104            .await
105            .context(PlanStatementSnafu)
106    }
107
108    /// Execute the given [Tql] query and return the result.
109    #[tracing::instrument(skip_all)]
110    pub(super) async fn execute_tql(&self, tql: Tql, query_ctx: QueryContextRef) -> Result<Output> {
111        let plan = self.plan_tql(tql, &query_ctx).await?;
112        self.query_engine
113            .execute(plan, query_ctx)
114            .await
115            .context(ExecLogicalPlanSnafu)
116    }
117}
operator/statement/tql.rs

operator/statement/
tql.rs
