gudusoft.gsqlparser.parser

Class MssqlSqlParser

Object

gudusoft.gsqlparser.parser.AbstractSqlParser

gudusoft.gsqlparser.parser.MssqlSqlParser

All Implemented Interfaces:

SqlParser

public class MssqlSqlParser
extends AbstractSqlParser

Microsoft SQL Server database SQL parser implementation.

This parser handles SQL Server-specific SQL syntax including:

• T-SQL blocks (stored procedures, functions, triggers)
• BEGIN/END blocks
• TRY/CATCH error handling
• GO batch separator
• SQL Server-specific DML/DDL (MERGE, OPENROWSET, etc.)
• Special token handling (LOCK TABLE, COPY INTO, etc.)

Design Notes:

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

Usage Example:

 // Get SQL Server parser from factory
 SqlParser parser = SqlParserFactory.get(EDbVendor.dbvmssql);

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

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

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

Since:

3.2.0.0

See Also:

SqlParser, AbstractSqlParser, TLexerMssql, TParserMssqlSql

Nested Class Summary

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

AbstractSqlParser.PreparedSqlReader

Field Summary

Fields

Modifier and Type	Field and Description
TLexerMssql	flexer The SQL Server 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
MssqlSqlParser() Construct SQL Server SQL parser.

Method Summary

Modifier and Type	Method and Description
protected void	extractVendorRawStatements(SqlParseResult.Builder builder) Call MSSQL-specific raw statement extraction logic.
protected TCustomLexer	getLexer(ParserContext context) Return the SQL Server lexer instance.
protected TCustomParser	getParser(ParserContext context, TSourceTokenList tokens) Return the SQL Server SQL parser instance with updated token list.
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 SQL Server-specific semantic analysis.
protected void	setupVendorParsersForExtraction() Setup MSSQL parser for raw statement extraction.
protected void	tokenizeVendorSql() Call MSSQL-specific tokenization logic.

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, 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 TLexerMssql flexer

The SQL Server lexer used for tokenization

Constructor Detail

MssqlSqlParser

public MssqlSqlParser()

Construct SQL Server SQL parser.

Configures the parser for SQL Server 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 SQL Server 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 SQL Server 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)

tokenizeVendorSql

protected void tokenizeVendorSql()

Call MSSQL-specific tokenization logic.

Delegates to domssqlsqltexttotokenlist which handles SQL Server's specific keyword recognition, bracket identifiers, and token generation.

Specified by:

tokenizeVendorSql in class AbstractSqlParser

setupVendorParsersForExtraction

protected void setupVendorParsersForExtraction()

Setup MSSQL parser for raw statement extraction.

MSSQL 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 MSSQL-specific raw statement extraction logic.

Delegates to domssqlgetrawsqlstatements which handles SQL Server's statement delimiters (semicolon and GO command).

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 SQL Server-specific semantic analysis.

When called via delegation from TGSqlParser (context.getGsqlparser() != null), semantic analysis is skipped here and handled by TGSqlParser.doDelegatedParse() to ensure resolver2 is stored in TGSqlParser where tests expect to find it.

When called directly on MssqlSqlParser, uses TBaseType flags to determine which resolver to use:

• TBaseType.isEnableResolver2() -> use TSQLResolver2
• TBaseType.isEnableResolver() -> use 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)