gudusoft.gsqlparser.parser

Class CouchbaseSqlParser

Object

gudusoft.gsqlparser.parser.AbstractSqlParser

gudusoft.gsqlparser.parser.CouchbaseSqlParser

All Implemented Interfaces:

SqlParser

public class CouchbaseSqlParser
extends AbstractSqlParser

Couchbase database SQL parser implementation.

This parser handles Couchbase-specific SQL syntax including:

• N1QL queries (SELECT, INSERT, UPDATE, DELETE)
• Couchbase-specific functions and operators
• Document-oriented query features

Design Notes:

• Extends AbstractSqlParser
• Can directly instantiate: TLexerCouchbase, TParserCouchbase
• Uses single parser (no secondary parser)
• Uses PostgreSQL-style tokenization
• Delimiter character: ';' for SQL statements

Usage Example:

 // Get Couchbase parser from factory
 SqlParser parser = SqlParserFactory.get(EDbVendor.dbvcouchbase);

 // Build context
 ParserContext context = new ParserContext.Builder(EDbVendor.dbvcouchbase)
     .sqlText("SELECT * FROM bucket WHERE type = 'user'")
     .build();

 // Parse
 SqlParseResult result = parser.parse(context);

 // Access statements
 TStatementList statements = result.getSqlStatements();
 

Since:

3.2.0.0

See Also:

SqlParser, AbstractSqlParser, TLexerCouchbase, TParserCouchbase

Nested Class Summary

Nested classes/interfaces inherited from class gudusoft.gsqlparser.parser.AbstractSqlParser

AbstractSqlParser.PreparedSqlReader

Field Summary

Fields

Modifier and Type	Field and Description
TLexerCouchbase	flexer The Couchbase lexer used for tokenization - public for TGSqlParser compatibility

Fields inherited from class gudusoft.gsqlparser.parser.AbstractSqlParser

defaultDelimiterStr, delimiterChar, frameStack, globalContext, globalFrame, lexer, parserContext, sourcetokenlist, sqlcmds, sqlEnv, sqlstatements, syntaxErrors, vendor

Constructor Summary

Constructors

Constructor and Description
CouchbaseSqlParser() Construct Couchbase SQL parser.

Method Summary

Modifier and Type	Method and Description
protected void	extractVendorRawStatements(SqlParseResult.Builder builder) Call Couchbase-specific raw statement extraction logic.
protected TCustomLexer	getLexer(ParserContext context) Return the Couchbase lexer instance.
protected TCustomParser	getParser(ParserContext context, TSourceTokenList tokens) Return the Couchbase SQL parser instance with updated token list.
protected TStatementList	performParsing(ParserContext context, TCustomParser parser, TCustomParser secondaryParser, TSourceTokenList tokens, TStatementList rawStatements) Perform full parsing of statements with syntax checking.
protected void	setupVendorParsersForExtraction() Setup Couchbase parser for raw statement extraction.
protected void	tokenizeVendorSql() Call Couchbase-specific tokenization logic.
String	toString()

Methods inherited from class gudusoft.gsqlparser.parser.AbstractSqlParser

afterStatementParsed, attemptErrorRecovery, copyErrorsFromStatement, doAfterTokenize, doExtractRawStatements, extractRawStatements, getanewsourcetoken, getDefaultDelimiterStr, getDelimiterChar, getErrorCount, getrawsqlstatements, getSecondaryParser, getSyntaxErrors, getVendor, handleStatementParsingException, initializeGlobalContext, isDollarFunctionDelimiter, onRawStatementComplete, onRawStatementCompleteVendorSpecific, parse, performInterpreter, performSemanticAnalysis, performTokenization, prepareSqlReader, processTokensBeforeParse, processTokensInTokenTable, setTokenHandle, tokenize, towinlinebreak

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

flexer

public TLexerCouchbase flexer

The Couchbase lexer used for tokenization - public for TGSqlParser compatibility

Constructor Detail

CouchbaseSqlParser

public CouchbaseSqlParser()

Construct Couchbase SQL parser.

Configures the parser for Couchbase database with default delimiter: semicolon (;)

Following the original TGSqlParser pattern, the lexer and parser are created once in the constructor and reused for all parsing operations.

Method Detail

getLexer

protected TCustomLexer getLexer(ParserContext context)

Return the Couchbase lexer instance.

The lexer is created once in the constructor and reused for all parsing operations. This method simply returns the existing instance, matching the original TGSqlParser pattern where the lexer is created once and reset before each use.

Specified by:

getLexer in class AbstractSqlParser

Parameters:

context - parser context (not used, lexer already created)

Returns:

the Couchbase lexer instance created in constructor

getParser

protected TCustomParser getParser(ParserContext context,
                                  TSourceTokenList tokens)

Return the Couchbase SQL parser instance with updated token list.

The parser is created once in the constructor and reused for all parsing operations. This method updates the token list and returns the existing instance, matching the original TGSqlParser pattern.

Specified by:

getParser in class AbstractSqlParser

Parameters:

context - parser context (not used, parser already created)

tokens - source token list to parse

Returns:

the Couchbase SQL parser instance created in constructor

tokenizeVendorSql

protected void tokenizeVendorSql()

Call Couchbase-specific tokenization logic.

Couchbase uses PostgreSQL-style tokenization, so delegates to docouchbasesqltexttotokenlist which in turn calls dopostgresqltexttotokenlist.

Specified by:

tokenizeVendorSql in class AbstractSqlParser

setupVendorParsersForExtraction

protected void setupVendorParsersForExtraction()

Setup Couchbase parser for raw statement extraction.

Couchbase uses a single parser, so we inject sqlcmds and update the token list for the main parser only.

Specified by:

setupVendorParsersForExtraction in class AbstractSqlParser

extractVendorRawStatements

protected void extractVendorRawStatements(SqlParseResult.Builder builder)

Call Couchbase-specific raw statement extraction logic.

Delegates to docouchbasegetrawsqlstatements which handles Couchbase's statement delimiters and BEGIN/END block processing.

Specified by:

extractVendorRawStatements in class AbstractSqlParser

Parameters:

builder - the result builder to populate with raw statements

performParsing

protected TStatementList performParsing(ParserContext context,
                                        TCustomParser parser,
                                        TCustomParser secondaryParser,
                                        TSourceTokenList tokens,
                                        TStatementList rawStatements)

Perform full parsing of statements with syntax checking.

This method orchestrates the parsing of all statements.

Important: This method does NOT extract raw statements - they are passed in as a parameter already extracted by AbstractSqlParser.extractRawStatements(gudusoft.gsqlparser.parser.ParserContext, gudusoft.gsqlparser.TSourceTokenList, gudusoft.gsqlparser.TCustomLexer, long).

Specified by:

performParsing in class AbstractSqlParser

Parameters:

context - parser context

parser - main SQL parser (TParserCouchbase)

secondaryParser - not used for Couchbase

tokens - source token list

rawStatements - raw statements already extracted (never null)

Returns:

list of fully parsed statements with AST built

toString

public String toString()

Overrides:

toString in class AbstractSqlParser