gudusoft.gsqlparser.parser

Class NetezzaSqlParser

Object

gudusoft.gsqlparser.parser.AbstractSqlParser

gudusoft.gsqlparser.parser.NetezzaSqlParser

All Implemented Interfaces:

SqlParser

public class NetezzaSqlParser
extends AbstractSqlParser

Netezza database SQL parser implementation.

This parser handles Netezza-specific SQL syntax including:

• Netezza PL/SQL blocks (procedures, functions)
• SQL*Plus-like commands
• Netezza-specific DML/DDL
• Type casting expressions
• Special token handling (INNER, NOT DEFERRABLE, etc.)

Design Notes:

• Extends AbstractSqlParser using the template method pattern
• Uses TLexerNetezza for tokenization
• Uses TParserNetezza for parsing
• Delimiter character: ';' for SQL statements

Usage Example:

 // Get Netezza parser from factory
 SqlParser parser = SqlParserFactory.get(EDbVendor.dbvnetezza);

 // Build context
 ParserContext context = new ParserContext.Builder(EDbVendor.dbvnetezza)
     .sqlText("SELECT * FROM Employees WHERE DepartmentID = 10")
     .build();

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

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

See Also:

SqlParser, AbstractSqlParser, TLexerNetezza, TParserNetezza

Nested Class Summary

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

AbstractSqlParser.PreparedSqlReader

Field Summary

Fields

Modifier and Type	Field and Description
TLexerNetezza	flexer The Netezza lexer used for tokenization

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
NetezzaSqlParser() Construct Netezza SQL parser.

Method Summary

Modifier and Type	Method and Description
protected void	extractVendorRawStatements(SqlParseResult.Builder builder) Call Netezza-specific raw statement extraction logic.
protected TCustomLexer	getLexer(ParserContext context) Return the Netezza lexer instance.
protected TCustomParser	getParser(ParserContext context, TSourceTokenList tokens) Return the Netezza SQL parser instance with updated token list.
protected TCustomParser	getSecondaryParser(ParserContext context, TSourceTokenList tokens) Return null for secondary parser (Netezza only uses one parser).
protected void	performInterpreter(ParserContext context, TStatementList statements) Perform interpretation/evaluation on parsed statements.
protected TStatementList	performParsing(ParserContext context, TCustomParser parser, TCustomParser secondaryParser, TSourceTokenList tokens, TStatementList rawStatements) Perform full parsing of statements with syntax checking.
protected void	performSemanticAnalysis(ParserContext context, TStatementList statements) Perform Netezza-specific semantic analysis using TSQLResolver.
protected void	setupVendorParsersForExtraction() Setup Netezza parser for raw statement extraction.
protected void	tokenizeVendorSql() Call Netezza-specific tokenization logic.

Methods inherited from class gudusoft.gsqlparser.parser.AbstractSqlParser

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

Methods inherited from class Object

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

Field Detail

flexer

public TLexerNetezza flexer

The Netezza lexer used for tokenization

Constructor Detail

NetezzaSqlParser

public NetezzaSqlParser()

Construct Netezza SQL parser.

Configures the parser for Netezza database with default delimiter (;).

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 Netezza lexer instance.

Specified by:

getLexer in class AbstractSqlParser

Parameters:

context - the parser context

Returns:

configured lexer instance (never null)

getParser

protected TCustomParser getParser(ParserContext context,
                                  TSourceTokenList tokens)

Return the Netezza SQL parser instance with updated token list.

Specified by:

getParser in class AbstractSqlParser

Parameters:

context - the parser context

tokens - the source token list

Returns:

configured parser instance (never null)

getSecondaryParser

protected TCustomParser getSecondaryParser(ParserContext context,
                                           TSourceTokenList tokens)

Return null for secondary parser (Netezza only uses one parser).

Overrides:

getSecondaryParser in class AbstractSqlParser

Parameters:

context - the parser context

tokens - the source token list

Returns:

secondary parser instance, or null if not needed

tokenizeVendorSql

protected void tokenizeVendorSql()

Call Netezza-specific tokenization logic.

Delegates to donetezzatexttotokenlist which handles Netezza's specific keyword recognition and token generation.

Specified by:

tokenizeVendorSql in class AbstractSqlParser

setupVendorParsersForExtraction

protected void setupVendorParsersForExtraction()

Setup Netezza parser for raw statement extraction.

Netezza 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 Netezza-specific raw statement extraction logic.

Delegates to donetezzagetrawsqlstatements which handles Netezza's statement delimiters.

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.

Specified by:

performParsing in class AbstractSqlParser

Parameters:

context - the parser context

parser - the main parser instance

secondaryParser - secondary parser (may be null)

tokens - the source token list

rawStatements - raw statements already extracted (never null)

Returns:

statement list with parsed AST (never null)

performSemanticAnalysis

protected void performSemanticAnalysis(ParserContext context,
                                       TStatementList statements)

Perform Netezza-specific semantic analysis using TSQLResolver.

Overrides:

performSemanticAnalysis in class AbstractSqlParser

Parameters:

context - the parser context

statements - the parsed statements (mutable)

performInterpreter

protected void performInterpreter(ParserContext context,
                                  TStatementList statements)

Perform interpretation/evaluation on parsed statements.

Overrides:

performInterpreter in class AbstractSqlParser

Parameters:

context - the parser context

statements - the parsed statements (mutable)