risingwave_sqlparser/ast/
statement.rs

1// Copyright 2025 RisingWave Labs
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 core::fmt;
16use core::fmt::Formatter;
17use std::fmt::Write;
18
19use itertools::Itertools;
20#[cfg(feature = "serde")]
21use serde::{Deserialize, Serialize};
22use winnow::ModalResult;
23
24use super::ddl::SourceWatermark;
25use super::legacy_source::{CompatibleFormatEncode, parse_format_encode};
26use super::{EmitMode, Ident, ObjectType, Query, Value};
27use crate::ast::{
28    ColumnDef, ObjectName, SqlOption, TableConstraint, display_comma_separated, display_separated,
29};
30use crate::keywords::Keyword;
31use crate::parser::{IncludeOption, IsOptional, Parser};
32use crate::parser_err;
33use crate::parser_v2::literal_u32;
34use crate::tokenizer::Token;
35
36/// Consumes token from the parser into an AST node.
37pub trait ParseTo: Sized {
38    fn parse_to(parser: &mut Parser<'_>) -> ModalResult<Self>;
39}
40
41#[macro_export]
42macro_rules! impl_parse_to {
43    () => {};
44    ($field:ident : $field_type:ty, $parser:ident) => {
45        let $field = <$field_type>::parse_to($parser)?;
46    };
47    ($field:ident => [$($arr:tt)+], $parser:ident) => {
48        let $field = $parser.parse_keywords(&[$($arr)+]);
49    };
50    ([$($arr:tt)+], $parser:ident) => {
51        $parser.expect_keywords(&[$($arr)+])?;
52    };
53}
54
55#[macro_export]
56macro_rules! impl_fmt_display {
57    () => {};
58    ($field:ident, $v:ident, $self:ident) => {{
59        let s = format!("{}", $self.$field);
60        if !s.is_empty() {
61            $v.push(s);
62        }
63    }};
64    ($field:ident => [$($arr:tt)+], $v:ident, $self:ident) => {
65        if $self.$field {
66            $v.push(format!("{}", display_separated(&[$($arr)+], " ")));
67        }
68    };
69    ([$($arr:tt)+], $v:ident) => {
70        $v.push(format!("{}", display_separated(&[$($arr)+], " ")));
71    };
72}
73
74// sql_grammar!(CreateSourceStatement {
75//     if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS],
76//     source_name: Ident,
77//     with_properties: AstOption<WithProperties>,
78//     [Keyword::ROW, Keyword::FORMAT],
79//     format_encode: SourceSchema,
80//     [Keyword::WATERMARK, Keyword::FOR] column [Keyword::AS] <expr>
81// });
82#[derive(Debug, Clone, PartialEq, Eq, Hash)]
83#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
84pub struct CreateSourceStatement {
85    pub temporary: bool,
86    pub if_not_exists: bool,
87    pub columns: Vec<ColumnDef>,
88    // The wildchar position in columns defined in sql. Only exist when using external schema.
89    pub wildcard_idx: Option<usize>,
90    pub constraints: Vec<TableConstraint>,
91    pub source_name: ObjectName,
92    pub with_properties: WithProperties,
93    pub format_encode: CompatibleFormatEncode,
94    pub source_watermarks: Vec<SourceWatermark>,
95    pub include_column_options: IncludeOption,
96}
97
98/// FORMAT means how to get the operation(Insert/Delete) from the input.
99///
100/// Check `CONNECTORS_COMPATIBLE_FORMATS` for what `FORMAT ... ENCODE ...` combinations are allowed.
101#[derive(Debug, Clone, PartialEq, Eq, Hash)]
102#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
103pub enum Format {
104    /// The format is the same with RisingWave's internal representation.
105    /// Used internally for schema change
106    Native,
107    /// for self-explanatory sources like iceberg, they have their own format, and should not be specified by user.
108    None,
109    // Keyword::DEBEZIUM
110    Debezium,
111    // Keyword::DEBEZIUM_MONGO
112    DebeziumMongo,
113    // Keyword::MAXWELL
114    Maxwell,
115    // Keyword::CANAL
116    Canal,
117    // Keyword::UPSERT
118    Upsert,
119    // Keyword::PLAIN
120    Plain,
121}
122
123// TODO: unify with `from_keyword`
124impl fmt::Display for Format {
125    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
126        write!(
127            f,
128            "{}",
129            match self {
130                Format::Native => "NATIVE",
131                Format::Debezium => "DEBEZIUM",
132                Format::DebeziumMongo => "DEBEZIUM_MONGO",
133                Format::Maxwell => "MAXWELL",
134                Format::Canal => "CANAL",
135                Format::Upsert => "UPSERT",
136                Format::Plain => "PLAIN",
137                Format::None => "NONE",
138            }
139        )
140    }
141}
142
143impl Format {
144    pub fn from_keyword(s: &str) -> ModalResult<Self> {
145        Ok(match s {
146            "DEBEZIUM" => Format::Debezium,
147            "DEBEZIUM_MONGO" => Format::DebeziumMongo,
148            "MAXWELL" => Format::Maxwell,
149            "CANAL" => Format::Canal,
150            "PLAIN" => Format::Plain,
151            "UPSERT" => Format::Upsert,
152            "NATIVE" => Format::Native,
153            "NONE" => Format::None,
154            _ => parser_err!(
155                "expected CANAL | PROTOBUF | DEBEZIUM | MAXWELL | PLAIN | NATIVE | NONE after FORMAT"
156            ),
157        })
158    }
159}
160
161/// Check `CONNECTORS_COMPATIBLE_FORMATS` for what `FORMAT ... ENCODE ...` combinations are allowed.
162#[derive(Debug, Clone, PartialEq, Eq, Hash)]
163#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
164pub enum Encode {
165    Avro,     // Keyword::Avro
166    Csv,      // Keyword::CSV
167    Protobuf, // Keyword::PROTOBUF
168    Json,     // Keyword::JSON
169    Bytes,    // Keyword::BYTES
170    /// for self-explanatory sources like iceberg, they have their own format, and should not be specified by user.
171    None,
172    Text, // Keyword::TEXT
173    /// The encode is the same with RisingWave's internal representation.
174    /// Used internally for schema change
175    Native,
176    Template,
177    Parquet,
178}
179
180// TODO: unify with `from_keyword`
181impl fmt::Display for Encode {
182    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
183        write!(
184            f,
185            "{}",
186            match self {
187                Encode::Avro => "AVRO",
188                Encode::Csv => "CSV",
189                Encode::Protobuf => "PROTOBUF",
190                Encode::Json => "JSON",
191                Encode::Bytes => "BYTES",
192                Encode::Native => "NATIVE",
193                Encode::Template => "TEMPLATE",
194                Encode::None => "NONE",
195                Encode::Parquet => "PARQUET",
196                Encode::Text => "TEXT",
197            }
198        )
199    }
200}
201
202impl Encode {
203    pub fn from_keyword(s: &str) -> ModalResult<Self> {
204        Ok(match s {
205            "AVRO" => Encode::Avro,
206            "TEXT" => Encode::Text,
207            "BYTES" => Encode::Bytes,
208            "CSV" => Encode::Csv,
209            "PROTOBUF" => Encode::Protobuf,
210            "JSON" => Encode::Json,
211            "TEMPLATE" => Encode::Template,
212            "PARQUET" => Encode::Parquet,
213            "NATIVE" => Encode::Native,
214            "NONE" => Encode::None,
215            _ => parser_err!(
216                "expected AVRO | BYTES | CSV | PROTOBUF | JSON | NATIVE | TEMPLATE | PARQUET | NONE after Encode"
217            ),
218        })
219    }
220}
221
222/// `FORMAT ... ENCODE ... [(a=b, ...)] [KEY ENCODE ...]`
223#[derive(Debug, Clone, PartialEq, Eq, Hash)]
224#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
225pub struct FormatEncodeOptions {
226    pub format: Format,
227    pub row_encode: Encode,
228    pub row_options: Vec<SqlOption>,
229
230    pub key_encode: Option<Encode>,
231}
232
233impl Parser<'_> {
234    /// Peek the next tokens to see if it is `FORMAT` or `ROW FORMAT` (for compatibility).
235    fn peek_format_encode_format(&mut self) -> bool {
236        (self.peek_nth_any_of_keywords(0, &[Keyword::ROW])
237            && self.peek_nth_any_of_keywords(1, &[Keyword::FORMAT])) // ROW FORMAT
238            || self.peek_nth_any_of_keywords(0, &[Keyword::FORMAT]) // FORMAT
239    }
240
241    /// Parse the source schema. The behavior depends on the `connector` type.
242    pub fn parse_format_encode_with_connector(
243        &mut self,
244        connector: &str,
245        cdc_source_job: bool,
246    ) -> ModalResult<CompatibleFormatEncode> {
247        // row format for cdc source must be debezium json
248        // row format for nexmark source must be native
249        // default row format for datagen source is native
250        // FIXME: parse input `connector` to enum type instead using string here
251        if connector.contains("-cdc") {
252            let expected = if cdc_source_job {
253                FormatEncodeOptions::plain_json()
254            } else if connector.contains("mongodb") {
255                FormatEncodeOptions::debezium_mongo_json()
256            } else {
257                FormatEncodeOptions::debezium_json()
258            };
259
260            if self.peek_format_encode_format() {
261                let schema = parse_format_encode(self)?.into_v2();
262                if schema != expected {
263                    parser_err!(
264                        "Row format for CDC connectors should be \
265                         either omitted or set to `{expected}`",
266                    );
267                }
268            }
269            Ok(expected.into())
270        } else if connector.contains("nexmark") {
271            let expected = FormatEncodeOptions::native();
272            if self.peek_format_encode_format() {
273                let schema = parse_format_encode(self)?.into_v2();
274                if schema != expected {
275                    parser_err!(
276                        "Row format for nexmark connectors should be \
277                         either omitted or set to `{expected}`",
278                    );
279                }
280            }
281            Ok(expected.into())
282        } else if connector.contains("datagen") {
283            Ok(if self.peek_format_encode_format() {
284                parse_format_encode(self)?
285            } else {
286                FormatEncodeOptions::native().into()
287            })
288        } else if connector.contains("iceberg") {
289            let expected = FormatEncodeOptions::none();
290            if self.peek_format_encode_format() {
291                let schema = parse_format_encode(self)?.into_v2();
292                if schema != expected {
293                    parser_err!(
294                        "Row format for iceberg connectors should be \
295                         either omitted or set to `{expected}`",
296                    );
297                }
298            }
299            Ok(expected.into())
300        } else if connector.contains("webhook") {
301            parser_err!(
302                "Source with webhook connector is not supported. \
303                 Please use the `CREATE TABLE ... WITH ...` statement instead.",
304            );
305        } else {
306            Ok(parse_format_encode(self)?)
307        }
308    }
309
310    /// Parse `FORMAT ... ENCODE ... (...)`.
311    pub fn parse_schema(&mut self) -> ModalResult<Option<FormatEncodeOptions>> {
312        if !self.parse_keyword(Keyword::FORMAT) {
313            return Ok(None);
314        }
315
316        let id = self.parse_identifier()?;
317        let s = id.value.to_ascii_uppercase();
318        let format = Format::from_keyword(&s)?;
319        self.expect_keyword(Keyword::ENCODE)?;
320        let id = self.parse_identifier()?;
321        let s = id.value.to_ascii_uppercase();
322        let row_encode = Encode::from_keyword(&s)?;
323        let row_options = self.parse_options()?;
324
325        let key_encode = if self.parse_keywords(&[Keyword::KEY, Keyword::ENCODE]) {
326            Some(Encode::from_keyword(
327                self.parse_identifier()?.value.to_ascii_uppercase().as_str(),
328            )?)
329        } else {
330            None
331        };
332
333        Ok(Some(FormatEncodeOptions {
334            format,
335            row_encode,
336            row_options,
337            key_encode,
338        }))
339    }
340}
341
342impl FormatEncodeOptions {
343    pub const fn plain_json() -> Self {
344        FormatEncodeOptions {
345            format: Format::Plain,
346            row_encode: Encode::Json,
347            row_options: Vec::new(),
348            key_encode: None,
349        }
350    }
351
352    /// Create a new source schema with `Debezium` format and `Json` encoding.
353    pub const fn debezium_json() -> Self {
354        FormatEncodeOptions {
355            format: Format::Debezium,
356            row_encode: Encode::Json,
357            row_options: Vec::new(),
358            key_encode: None,
359        }
360    }
361
362    pub const fn debezium_mongo_json() -> Self {
363        FormatEncodeOptions {
364            format: Format::DebeziumMongo,
365            row_encode: Encode::Json,
366            row_options: Vec::new(),
367            key_encode: None,
368        }
369    }
370
371    /// Create a new source schema with `Native` format and encoding.
372    pub const fn native() -> Self {
373        FormatEncodeOptions {
374            format: Format::Native,
375            row_encode: Encode::Native,
376            row_options: Vec::new(),
377            key_encode: None,
378        }
379    }
380
381    /// Create a new source schema with `None` format and encoding.
382    /// Used for self-explanatory source like iceberg.
383    pub const fn none() -> Self {
384        FormatEncodeOptions {
385            format: Format::None,
386            row_encode: Encode::None,
387            row_options: Vec::new(),
388            key_encode: None,
389        }
390    }
391
392    pub fn row_options(&self) -> &[SqlOption] {
393        self.row_options.as_ref()
394    }
395}
396
397impl fmt::Display for FormatEncodeOptions {
398    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
399        write!(f, "FORMAT {} ENCODE {}", self.format, self.row_encode)?;
400
401        if !self.row_options().is_empty() {
402            write!(f, " ({})", display_comma_separated(self.row_options()))?;
403        }
404
405        if let Some(key_encode) = &self.key_encode {
406            write!(f, " KEY ENCODE {}", key_encode)?;
407        }
408
409        Ok(())
410    }
411}
412
413pub(super) fn fmt_create_items(
414    columns: &[ColumnDef],
415    constraints: &[TableConstraint],
416    watermarks: &[SourceWatermark],
417    wildcard_idx: Option<usize>,
418) -> std::result::Result<String, fmt::Error> {
419    let mut items = String::new();
420    let has_items = !columns.is_empty()
421        || !constraints.is_empty()
422        || !watermarks.is_empty()
423        || wildcard_idx.is_some();
424    has_items.then(|| write!(&mut items, "("));
425
426    if let Some(wildcard_idx) = wildcard_idx {
427        let (columns_l, columns_r) = columns.split_at(wildcard_idx);
428        write!(&mut items, "{}", display_comma_separated(columns_l))?;
429        if !columns_l.is_empty() {
430            write!(&mut items, ", ")?;
431        }
432        write!(&mut items, "{}", Token::Mul)?;
433        if !columns_r.is_empty() {
434            write!(&mut items, ", ")?;
435        }
436        write!(&mut items, "{}", display_comma_separated(columns_r))?;
437    } else {
438        write!(&mut items, "{}", display_comma_separated(columns))?;
439    }
440    let mut leading_items = !columns.is_empty() || wildcard_idx.is_some();
441
442    if leading_items && !constraints.is_empty() {
443        write!(&mut items, ", ")?;
444    }
445    write!(&mut items, "{}", display_comma_separated(constraints))?;
446    leading_items |= !constraints.is_empty();
447
448    if leading_items && !watermarks.is_empty() {
449        write!(&mut items, ", ")?;
450    }
451    write!(&mut items, "{}", display_comma_separated(watermarks))?;
452    // uncomment this when adding more sections below
453    // leading_items |= !watermarks.is_empty();
454
455    has_items.then(|| write!(&mut items, ")"));
456    Ok(items)
457}
458
459impl fmt::Display for CreateSourceStatement {
460    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
461        let mut v: Vec<String> = vec![];
462        impl_fmt_display!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], v, self);
463        impl_fmt_display!(source_name, v, self);
464
465        let items = fmt_create_items(
466            &self.columns,
467            &self.constraints,
468            &self.source_watermarks,
469            self.wildcard_idx,
470        )?;
471        if !items.is_empty() {
472            v.push(items);
473        }
474
475        for item in &self.include_column_options {
476            v.push(format!("{}", item));
477        }
478        impl_fmt_display!(with_properties, v, self);
479        impl_fmt_display!(format_encode, v, self);
480        v.iter().join(" ").fmt(f)
481    }
482}
483
484#[derive(Debug, Clone, PartialEq, Eq, Hash)]
485#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
486pub enum CreateSink {
487    From(ObjectName),
488    AsQuery(Box<Query>),
489}
490
491impl fmt::Display for CreateSink {
492    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
493        match self {
494            Self::From(mv) => write!(f, "FROM {}", mv),
495            Self::AsQuery(query) => write!(f, "AS {}", query),
496        }
497    }
498}
499// sql_grammar!(CreateSinkStatement {
500//     if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS],
501//     sink_name: Ident,
502//     [Keyword::FROM],
503//     materialized_view: Ident,
504//     with_properties: AstOption<WithProperties>,
505// });
506#[derive(Debug, Clone, PartialEq, Eq, Hash)]
507#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
508pub struct CreateSinkStatement {
509    pub if_not_exists: bool,
510    pub sink_name: ObjectName,
511    pub with_properties: WithProperties,
512    pub sink_from: CreateSink,
513
514    // only used when creating sink into a table
515    // insert to specific columns of the target table
516    pub columns: Vec<Ident>,
517    pub emit_mode: Option<EmitMode>,
518    pub sink_schema: Option<FormatEncodeOptions>,
519    pub into_table_name: Option<ObjectName>,
520}
521
522impl ParseTo for CreateSinkStatement {
523    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
524        impl_parse_to!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], p);
525        impl_parse_to!(sink_name: ObjectName, p);
526
527        let mut target_spec_columns = Vec::new();
528        let into_table_name = if p.parse_keyword(Keyword::INTO) {
529            impl_parse_to!(into_table_name: ObjectName, p);
530
531            // we only allow specify columns when creating sink into a table
532            target_spec_columns = p.parse_parenthesized_column_list(IsOptional::Optional)?;
533            Some(into_table_name)
534        } else {
535            None
536        };
537
538        let sink_from = if p.parse_keyword(Keyword::FROM) {
539            impl_parse_to!(from_name: ObjectName, p);
540            CreateSink::From(from_name)
541        } else if p.parse_keyword(Keyword::AS) {
542            let query = Box::new(p.parse_query()?);
543            CreateSink::AsQuery(query)
544        } else {
545            p.expected("FROM or AS after CREATE SINK sink_name")?
546        };
547
548        let emit_mode: Option<EmitMode> = p.parse_emit_mode()?;
549
550        // This check cannot be put into the `WithProperties::parse_to`, since other
551        // statements may not need the with properties.
552        if !p.peek_nth_any_of_keywords(0, &[Keyword::WITH]) && into_table_name.is_none() {
553            p.expected("WITH")?
554        }
555        impl_parse_to!(with_properties: WithProperties, p);
556
557        if with_properties.0.is_empty() && into_table_name.is_none() {
558            parser_err!("sink properties not provided");
559        }
560
561        let sink_schema = p.parse_schema()?;
562
563        Ok(Self {
564            if_not_exists,
565            sink_name,
566            with_properties,
567            sink_from,
568            columns: target_spec_columns,
569            emit_mode,
570            sink_schema,
571            into_table_name,
572        })
573    }
574}
575
576impl fmt::Display for CreateSinkStatement {
577    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
578        let mut v: Vec<String> = vec![];
579        impl_fmt_display!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], v, self);
580        impl_fmt_display!(sink_name, v, self);
581        if let Some(into_table) = &self.into_table_name {
582            impl_fmt_display!([Keyword::INTO], v);
583            impl_fmt_display!([into_table], v);
584            if !self.columns.is_empty() {
585                v.push(format!("({})", display_comma_separated(&self.columns)));
586            }
587        }
588        impl_fmt_display!(sink_from, v, self);
589        if let Some(ref emit_mode) = self.emit_mode {
590            v.push(format!("EMIT {}", emit_mode));
591        }
592        impl_fmt_display!(with_properties, v, self);
593        if let Some(schema) = &self.sink_schema {
594            v.push(format!("{}", schema));
595        }
596        v.iter().join(" ").fmt(f)
597    }
598}
599
600// sql_grammar!(CreateSubscriptionStatement {
601//     if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS],
602//     subscription_name: Ident,
603//     [Keyword::FROM],
604//     materialized_view: Ident,
605//     with_properties: AstOption<WithProperties>,
606// });
607#[derive(Debug, Clone, PartialEq, Eq, Hash)]
608#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
609pub struct CreateSubscriptionStatement {
610    pub if_not_exists: bool,
611    pub subscription_name: ObjectName,
612    pub with_properties: WithProperties,
613    pub subscription_from: ObjectName,
614    // pub emit_mode: Option<EmitMode>,
615}
616
617impl ParseTo for CreateSubscriptionStatement {
618    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
619        impl_parse_to!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], p);
620        impl_parse_to!(subscription_name: ObjectName, p);
621
622        let subscription_from = if p.parse_keyword(Keyword::FROM) {
623            impl_parse_to!(from_name: ObjectName, p);
624            from_name
625        } else {
626            p.expected("FROM after CREATE SUBSCRIPTION subscription_name")?
627        };
628
629        // let emit_mode = p.parse_emit_mode()?;
630
631        // This check cannot be put into the `WithProperties::parse_to`, since other
632        // statements may not need the with properties.
633        if !p.peek_nth_any_of_keywords(0, &[Keyword::WITH]) {
634            p.expected("WITH")?
635        }
636        impl_parse_to!(with_properties: WithProperties, p);
637
638        if with_properties.0.is_empty() {
639            parser_err!("subscription properties not provided");
640        }
641
642        Ok(Self {
643            if_not_exists,
644            subscription_name,
645            with_properties,
646            subscription_from,
647        })
648    }
649}
650
651impl fmt::Display for CreateSubscriptionStatement {
652    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
653        let mut v: Vec<String> = vec![];
654        impl_fmt_display!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], v, self);
655        impl_fmt_display!(subscription_name, v, self);
656        v.push(format!("FROM {}", self.subscription_from));
657        impl_fmt_display!(with_properties, v, self);
658        v.iter().join(" ").fmt(f)
659    }
660}
661
662#[derive(Debug, Clone, PartialEq, Eq, Hash)]
663#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
664pub enum DeclareCursor {
665    Query(Box<Query>),
666    Subscription(ObjectName, Since),
667}
668
669impl fmt::Display for DeclareCursor {
670    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
671        let mut v: Vec<String> = vec![];
672        match self {
673            DeclareCursor::Query(query) => v.push(format!("{}", query.as_ref())),
674            DeclareCursor::Subscription(name, since) => {
675                v.push(format!("{}", name));
676                v.push(format!("{:?}", since));
677            }
678        }
679        v.iter().join(" ").fmt(f)
680    }
681}
682
683// sql_grammar!(DeclareCursorStatement {
684//     cursor_name: Ident,
685//     [Keyword::SUBSCRIPTION]
686//     [Keyword::CURSOR],
687//     [Keyword::FOR],
688//     subscription: Ident or query: Query,
689//     [Keyword::SINCE],
690//     rw_timestamp: Ident,
691// });
692#[derive(Debug, Clone, PartialEq, Eq, Hash)]
693#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
694pub struct DeclareCursorStatement {
695    pub cursor_name: Ident,
696    pub declare_cursor: DeclareCursor,
697}
698
699impl ParseTo for DeclareCursorStatement {
700    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
701        let cursor_name = p.parse_identifier_non_reserved()?;
702
703        let declare_cursor = if !p.parse_keyword(Keyword::SUBSCRIPTION) {
704            p.expect_keyword(Keyword::CURSOR)?;
705            p.expect_keyword(Keyword::FOR)?;
706            DeclareCursor::Query(Box::new(p.parse_query()?))
707        } else {
708            p.expect_keyword(Keyword::CURSOR)?;
709            p.expect_keyword(Keyword::FOR)?;
710            let cursor_for_name = p.parse_object_name()?;
711            let rw_timestamp = p.parse_since()?;
712            DeclareCursor::Subscription(cursor_for_name, rw_timestamp)
713        };
714
715        Ok(Self {
716            cursor_name,
717            declare_cursor,
718        })
719    }
720}
721
722impl fmt::Display for DeclareCursorStatement {
723    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
724        let mut v: Vec<String> = vec![];
725        impl_fmt_display!(cursor_name, v, self);
726        match &self.declare_cursor {
727            DeclareCursor::Query(_) => {
728                v.push("CURSOR FOR ".to_owned());
729            }
730            DeclareCursor::Subscription { .. } => {
731                v.push("SUBSCRIPTION CURSOR FOR ".to_owned());
732            }
733        }
734        impl_fmt_display!(declare_cursor, v, self);
735        v.iter().join(" ").fmt(f)
736    }
737}
738
739// sql_grammar!(FetchCursorStatement {
740//     cursor_name: Ident,
741// });
742#[derive(Debug, Clone, PartialEq, Eq, Hash)]
743#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
744pub struct FetchCursorStatement {
745    pub cursor_name: Ident,
746    pub count: u32,
747    pub with_properties: WithProperties,
748}
749
750impl ParseTo for FetchCursorStatement {
751    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
752        let count = if p.parse_keyword(Keyword::NEXT) {
753            1
754        } else {
755            literal_u32(p)?
756        };
757        p.expect_keyword(Keyword::FROM)?;
758        let cursor_name = p.parse_identifier_non_reserved()?;
759        impl_parse_to!(with_properties: WithProperties, p);
760
761        Ok(Self {
762            cursor_name,
763            count,
764            with_properties,
765        })
766    }
767}
768
769impl fmt::Display for FetchCursorStatement {
770    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
771        let mut v: Vec<String> = vec![];
772        if self.count == 1 {
773            v.push("NEXT ".to_owned());
774        } else {
775            impl_fmt_display!(count, v, self);
776        }
777        v.push("FROM ".to_owned());
778        impl_fmt_display!(cursor_name, v, self);
779        v.iter().join(" ").fmt(f)
780    }
781}
782
783// sql_grammar!(CloseCursorStatement {
784//     cursor_name: Ident,
785// });
786#[derive(Debug, Clone, PartialEq, Eq, Hash)]
787#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
788pub struct CloseCursorStatement {
789    pub cursor_name: Option<Ident>,
790}
791
792impl ParseTo for CloseCursorStatement {
793    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
794        let cursor_name = if p.parse_keyword(Keyword::ALL) {
795            None
796        } else {
797            Some(p.parse_identifier_non_reserved()?)
798        };
799
800        Ok(Self { cursor_name })
801    }
802}
803
804impl fmt::Display for CloseCursorStatement {
805    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
806        let mut v: Vec<String> = vec![];
807        if let Some(cursor_name) = &self.cursor_name {
808            v.push(format!("{}", cursor_name));
809        } else {
810            v.push("ALL".to_owned());
811        }
812        v.iter().join(" ").fmt(f)
813    }
814}
815
816// sql_grammar!(CreateConnectionStatement {
817//     if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS],
818//     connection_name: Ident,
819//     with_properties: AstOption<WithProperties>,
820// });
821#[derive(Debug, Clone, PartialEq, Eq, Hash)]
822#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
823pub struct CreateConnectionStatement {
824    pub if_not_exists: bool,
825    pub connection_name: ObjectName,
826    pub with_properties: WithProperties,
827}
828
829impl ParseTo for CreateConnectionStatement {
830    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
831        impl_parse_to!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], p);
832        impl_parse_to!(connection_name: ObjectName, p);
833        impl_parse_to!(with_properties: WithProperties, p);
834        if with_properties.0.is_empty() {
835            parser_err!("connection properties not provided");
836        }
837
838        Ok(Self {
839            if_not_exists,
840            connection_name,
841            with_properties,
842        })
843    }
844}
845
846impl fmt::Display for CreateConnectionStatement {
847    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
848        let mut v: Vec<String> = vec![];
849        impl_fmt_display!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], v, self);
850        impl_fmt_display!(connection_name, v, self);
851        impl_fmt_display!(with_properties, v, self);
852        v.iter().join(" ").fmt(f)
853    }
854}
855
856#[derive(Debug, Clone, PartialEq, Eq, Hash)]
857#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
858pub struct CreateSecretStatement {
859    pub if_not_exists: bool,
860    pub secret_name: ObjectName,
861    pub credential: Value,
862    pub with_properties: WithProperties,
863}
864
865impl ParseTo for CreateSecretStatement {
866    fn parse_to(parser: &mut Parser<'_>) -> ModalResult<Self> {
867        impl_parse_to!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], parser);
868        impl_parse_to!(secret_name: ObjectName, parser);
869        impl_parse_to!(with_properties: WithProperties, parser);
870        let mut credential = Value::Null;
871        if parser.parse_keyword(Keyword::AS) {
872            credential = parser.ensure_parse_value()?;
873        }
874        Ok(Self {
875            if_not_exists,
876            secret_name,
877            credential,
878            with_properties,
879        })
880    }
881}
882
883impl fmt::Display for CreateSecretStatement {
884    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
885        let mut v: Vec<String> = vec![];
886        impl_fmt_display!(if_not_exists => [Keyword::IF, Keyword::NOT, Keyword::EXISTS], v, self);
887        impl_fmt_display!(secret_name, v, self);
888        impl_fmt_display!(with_properties, v, self);
889        if self.credential != Value::Null {
890            v.push("AS".to_owned());
891            impl_fmt_display!(credential, v, self);
892        }
893        v.iter().join(" ").fmt(f)
894    }
895}
896
897#[derive(Debug, Clone, PartialEq, Eq, Hash)]
898#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
899pub struct WithProperties(pub Vec<SqlOption>);
900
901impl ParseTo for WithProperties {
902    fn parse_to(parser: &mut Parser<'_>) -> ModalResult<Self> {
903        Ok(Self(
904            parser.parse_options_with_preceding_keyword(Keyword::WITH)?,
905        ))
906    }
907}
908
909impl fmt::Display for WithProperties {
910    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
911        if !self.0.is_empty() {
912            write!(f, "WITH ({})", display_comma_separated(self.0.as_slice()))
913        } else {
914            Ok(())
915        }
916    }
917}
918
919#[derive(Debug, Clone, PartialEq, Eq, Hash)]
920#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
921pub enum Since {
922    TimestampMsNum(u64),
923    ProcessTime,
924    Begin,
925    Full,
926}
927
928impl fmt::Display for Since {
929    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
930        use Since::*;
931        match self {
932            TimestampMsNum(ts) => write!(f, " SINCE {}", ts),
933            ProcessTime => write!(f, " SINCE PROCTIME()"),
934            Begin => write!(f, " SINCE BEGIN()"),
935            Full => write!(f, " FULL"),
936        }
937    }
938}
939
940#[derive(Debug, Clone, PartialEq, Eq, Hash)]
941#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
942pub struct RowSchemaLocation {
943    pub value: AstString,
944}
945
946impl ParseTo for RowSchemaLocation {
947    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
948        impl_parse_to!([Keyword::ROW, Keyword::SCHEMA, Keyword::LOCATION], p);
949        impl_parse_to!(value: AstString, p);
950        Ok(Self { value })
951    }
952}
953
954impl fmt::Display for RowSchemaLocation {
955    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
956        let mut v = vec![];
957        impl_fmt_display!([Keyword::ROW, Keyword::SCHEMA, Keyword::LOCATION], v);
958        impl_fmt_display!(value, v, self);
959        v.iter().join(" ").fmt(f)
960    }
961}
962
963/// String literal. The difference with String is that it is displayed with
964/// single-quotes.
965#[derive(Debug, Clone, PartialEq, Eq, Hash)]
966#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
967pub struct AstString(pub String);
968
969impl ParseTo for AstString {
970    fn parse_to(parser: &mut Parser<'_>) -> ModalResult<Self> {
971        Ok(Self(parser.parse_literal_string()?))
972    }
973}
974
975impl fmt::Display for AstString {
976    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
977        write!(f, "'{}'", self.0)
978    }
979}
980
981/// This trait is used to replace `Option` because `fmt::Display` can not be implemented for
982/// `Option<T>`.
983#[derive(Debug, Clone, PartialEq, Eq, Hash)]
984#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
985pub enum AstOption<T> {
986    /// No value
987    None,
988    /// Some value `T`
989    Some(T),
990}
991
992impl<T: ParseTo> ParseTo for AstOption<T> {
993    fn parse_to(parser: &mut Parser<'_>) -> ModalResult<Self> {
994        match T::parse_to(parser) {
995            Ok(t) => Ok(AstOption::Some(t)),
996            Err(_) => Ok(AstOption::None),
997        }
998    }
999}
1000
1001impl<T: fmt::Display> fmt::Display for AstOption<T> {
1002    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1003        match &self {
1004            AstOption::Some(t) => t.fmt(f),
1005            AstOption::None => Ok(()),
1006        }
1007    }
1008}
1009
1010impl<T> From<AstOption<T>> for Option<T> {
1011    fn from(val: AstOption<T>) -> Self {
1012        match val {
1013            AstOption::Some(t) => Some(t),
1014            AstOption::None => None,
1015        }
1016    }
1017}
1018
1019#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1020#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
1021pub struct CreateUserStatement {
1022    pub user_name: ObjectName,
1023    pub with_options: UserOptions,
1024}
1025
1026#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1027#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
1028pub struct AlterUserStatement {
1029    pub user_name: ObjectName,
1030    pub mode: AlterUserMode,
1031}
1032
1033#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1034#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
1035pub enum AlterUserMode {
1036    Options(UserOptions),
1037    Rename(ObjectName),
1038}
1039
1040#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1041#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
1042pub enum UserOption {
1043    SuperUser,
1044    NoSuperUser,
1045    CreateDB,
1046    NoCreateDB,
1047    CreateUser,
1048    NoCreateUser,
1049    Login,
1050    NoLogin,
1051    EncryptedPassword(AstString),
1052    Password(Option<AstString>),
1053    OAuth(Vec<SqlOption>),
1054}
1055
1056impl fmt::Display for UserOption {
1057    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1058        match self {
1059            UserOption::SuperUser => write!(f, "SUPERUSER"),
1060            UserOption::NoSuperUser => write!(f, "NOSUPERUSER"),
1061            UserOption::CreateDB => write!(f, "CREATEDB"),
1062            UserOption::NoCreateDB => write!(f, "NOCREATEDB"),
1063            UserOption::CreateUser => write!(f, "CREATEUSER"),
1064            UserOption::NoCreateUser => write!(f, "NOCREATEUSER"),
1065            UserOption::Login => write!(f, "LOGIN"),
1066            UserOption::NoLogin => write!(f, "NOLOGIN"),
1067            UserOption::EncryptedPassword(p) => write!(f, "ENCRYPTED PASSWORD {}", p),
1068            UserOption::Password(None) => write!(f, "PASSWORD NULL"),
1069            UserOption::Password(Some(p)) => write!(f, "PASSWORD {}", p),
1070            UserOption::OAuth(options) => {
1071                write!(f, "({})", display_comma_separated(options.as_slice()))
1072            }
1073        }
1074    }
1075}
1076
1077#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1078#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
1079pub struct UserOptions(pub Vec<UserOption>);
1080
1081#[derive(Default)]
1082struct UserOptionsBuilder {
1083    super_user: Option<UserOption>,
1084    create_db: Option<UserOption>,
1085    create_user: Option<UserOption>,
1086    login: Option<UserOption>,
1087    password: Option<UserOption>,
1088}
1089
1090impl UserOptionsBuilder {
1091    fn build(self) -> UserOptions {
1092        let mut options = vec![];
1093        if let Some(option) = self.super_user {
1094            options.push(option);
1095        }
1096        if let Some(option) = self.create_db {
1097            options.push(option);
1098        }
1099        if let Some(option) = self.create_user {
1100            options.push(option);
1101        }
1102        if let Some(option) = self.login {
1103            options.push(option);
1104        }
1105        if let Some(option) = self.password {
1106            options.push(option);
1107        }
1108        UserOptions(options)
1109    }
1110}
1111
1112impl ParseTo for UserOptions {
1113    fn parse_to(parser: &mut Parser<'_>) -> ModalResult<Self> {
1114        let mut builder = UserOptionsBuilder::default();
1115        let add_option = |item: &mut Option<UserOption>, user_option| {
1116            let old_value = item.replace(user_option);
1117            if old_value.is_some() {
1118                parser_err!("conflicting or redundant options");
1119            }
1120            Ok(())
1121        };
1122        let _ = parser.parse_keyword(Keyword::WITH);
1123        loop {
1124            let token = parser.peek_token();
1125            if token == Token::EOF || token == Token::SemiColon {
1126                break;
1127            }
1128
1129            if let Token::Word(ref w) = token.token {
1130                let checkpoint = *parser;
1131                parser.next_token();
1132                let (item_mut_ref, user_option) = match w.keyword {
1133                    Keyword::SUPERUSER => (&mut builder.super_user, UserOption::SuperUser),
1134                    Keyword::NOSUPERUSER => (&mut builder.super_user, UserOption::NoSuperUser),
1135                    Keyword::CREATEDB => (&mut builder.create_db, UserOption::CreateDB),
1136                    Keyword::NOCREATEDB => (&mut builder.create_db, UserOption::NoCreateDB),
1137                    Keyword::CREATEUSER => (&mut builder.create_user, UserOption::CreateUser),
1138                    Keyword::NOCREATEUSER => (&mut builder.create_user, UserOption::NoCreateUser),
1139                    Keyword::LOGIN => (&mut builder.login, UserOption::Login),
1140                    Keyword::NOLOGIN => (&mut builder.login, UserOption::NoLogin),
1141                    Keyword::PASSWORD => {
1142                        if parser.parse_keyword(Keyword::NULL) {
1143                            (&mut builder.password, UserOption::Password(None))
1144                        } else {
1145                            (
1146                                &mut builder.password,
1147                                UserOption::Password(Some(AstString::parse_to(parser)?)),
1148                            )
1149                        }
1150                    }
1151                    Keyword::ENCRYPTED => {
1152                        parser.expect_keyword(Keyword::PASSWORD)?;
1153                        (
1154                            &mut builder.password,
1155                            UserOption::EncryptedPassword(AstString::parse_to(parser)?),
1156                        )
1157                    }
1158                    Keyword::OAUTH => {
1159                        let options = parser.parse_options()?;
1160                        (&mut builder.password, UserOption::OAuth(options))
1161                    }
1162                    _ => {
1163                        parser.expected_at(
1164                            checkpoint,
1165                            "SUPERUSER | NOSUPERUSER | CREATEDB | NOCREATEDB | LOGIN \
1166                            | NOLOGIN | CREATEUSER | NOCREATEUSER | [ENCRYPTED] PASSWORD | NULL | OAUTH",
1167                        )?;
1168                        unreachable!()
1169                    }
1170                };
1171                add_option(item_mut_ref, user_option)?;
1172            } else {
1173                parser.expected(
1174                    "SUPERUSER | NOSUPERUSER | CREATEDB | NOCREATEDB | LOGIN | NOLOGIN \
1175                        | CREATEUSER | NOCREATEUSER | [ENCRYPTED] PASSWORD | NULL | OAUTH",
1176                )?
1177            }
1178        }
1179        Ok(builder.build())
1180    }
1181}
1182
1183impl fmt::Display for UserOptions {
1184    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1185        if !self.0.is_empty() {
1186            write!(f, "WITH {}", display_separated(self.0.as_slice(), " "))
1187        } else {
1188            Ok(())
1189        }
1190    }
1191}
1192
1193impl ParseTo for CreateUserStatement {
1194    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
1195        impl_parse_to!(user_name: ObjectName, p);
1196        impl_parse_to!(with_options: UserOptions, p);
1197
1198        Ok(CreateUserStatement {
1199            user_name,
1200            with_options,
1201        })
1202    }
1203}
1204
1205impl fmt::Display for CreateUserStatement {
1206    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1207        let mut v: Vec<String> = vec![];
1208        impl_fmt_display!(user_name, v, self);
1209        impl_fmt_display!(with_options, v, self);
1210        v.iter().join(" ").fmt(f)
1211    }
1212}
1213
1214impl fmt::Display for AlterUserMode {
1215    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1216        match self {
1217            AlterUserMode::Options(options) => {
1218                write!(f, "{}", options)
1219            }
1220            AlterUserMode::Rename(new_name) => {
1221                write!(f, "RENAME TO {}", new_name)
1222            }
1223        }
1224    }
1225}
1226
1227impl fmt::Display for AlterUserStatement {
1228    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1229        let mut v: Vec<String> = vec![];
1230        impl_fmt_display!(user_name, v, self);
1231        impl_fmt_display!(mode, v, self);
1232        v.iter().join(" ").fmt(f)
1233    }
1234}
1235
1236impl ParseTo for AlterUserStatement {
1237    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
1238        impl_parse_to!(user_name: ObjectName, p);
1239        impl_parse_to!(mode: AlterUserMode, p);
1240
1241        Ok(AlterUserStatement { user_name, mode })
1242    }
1243}
1244
1245impl ParseTo for AlterUserMode {
1246    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
1247        if p.parse_keyword(Keyword::RENAME) {
1248            p.expect_keyword(Keyword::TO)?;
1249            impl_parse_to!(new_name: ObjectName, p);
1250            Ok(AlterUserMode::Rename(new_name))
1251        } else {
1252            impl_parse_to!(with_options: UserOptions, p);
1253            Ok(AlterUserMode::Options(with_options))
1254        }
1255    }
1256}
1257
1258#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1259#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
1260pub struct DropStatement {
1261    /// The type of the object to drop: TABLE, VIEW, etc.
1262    pub object_type: ObjectType,
1263    /// An optional `IF EXISTS` clause. (Non-standard.)
1264    pub if_exists: bool,
1265    /// Object to drop.
1266    pub object_name: ObjectName,
1267    /// Whether `CASCADE` was specified. This will be `false` when
1268    /// `RESTRICT` or no drop behavior at all was specified.
1269    pub drop_mode: AstOption<DropMode>,
1270}
1271
1272// sql_grammar!(DropStatement {
1273//     object_type: ObjectType,
1274//     if_exists => [Keyword::IF, Keyword::EXISTS],
1275//     name: ObjectName,
1276//     drop_mode: AstOption<DropMode>,
1277// });
1278impl ParseTo for DropStatement {
1279    fn parse_to(p: &mut Parser<'_>) -> ModalResult<Self> {
1280        impl_parse_to!(object_type: ObjectType, p);
1281        impl_parse_to!(if_exists => [Keyword::IF, Keyword::EXISTS], p);
1282        let object_name = p.parse_object_name()?;
1283        impl_parse_to!(drop_mode: AstOption<DropMode>, p);
1284        Ok(Self {
1285            object_type,
1286            if_exists,
1287            object_name,
1288            drop_mode,
1289        })
1290    }
1291}
1292
1293impl fmt::Display for DropStatement {
1294    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1295        let mut v: Vec<String> = vec![];
1296        impl_fmt_display!(object_type, v, self);
1297        impl_fmt_display!(if_exists => [Keyword::IF, Keyword::EXISTS], v, self);
1298        impl_fmt_display!(object_name, v, self);
1299        impl_fmt_display!(drop_mode, v, self);
1300        v.iter().join(" ").fmt(f)
1301    }
1302}
1303
1304#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1305#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
1306pub enum DropMode {
1307    Cascade,
1308    Restrict,
1309}
1310
1311impl ParseTo for DropMode {
1312    fn parse_to(parser: &mut Parser<'_>) -> ModalResult<Self> {
1313        let drop_mode = if parser.parse_keyword(Keyword::CASCADE) {
1314            DropMode::Cascade
1315        } else if parser.parse_keyword(Keyword::RESTRICT) {
1316            DropMode::Restrict
1317        } else {
1318            return parser.expected("CASCADE | RESTRICT");
1319        };
1320        Ok(drop_mode)
1321    }
1322}
1323
1324impl fmt::Display for DropMode {
1325    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1326        f.write_str(match self {
1327            DropMode::Cascade => "CASCADE",
1328            DropMode::Restrict => "RESTRICT",
1329        })
1330    }
1331}
risingwave_sqlparser/ast/statement.rs

risingwave_sqlparser/ast/
statement.rs
