dt-sql-parser/dist/parser/impala/index.js

SQL Parsers for BigData, built with antlr4

import { ImpalaSqlLexer } from '../../lib/impala/ImpalaSqlLexer';
import { ImpalaSqlParser } from '../../lib/impala/ImpalaSqlParser';
import { BasicSQL } from '../common/basicSQL';
import { EntityContextType } from '../common/types';
import { ImpalaEntityCollector } from './impalaEntityCollector';
import { ImpalaErrorListener } from './ImpalaErrorListener';
import { ImpalaSqlSplitListener } from './impalaSplitListener';
export { ImpalaEntityCollector, ImpalaSqlSplitListener };
export class ImpalaSQL extends BasicSQL {
    constructor() {
        super(...arguments);
        this.preferredRules = new Set([
            ImpalaSqlParser.RULE_functionNameCreate,
            ImpalaSqlParser.RULE_tableNameCreate,
            ImpalaSqlParser.RULE_viewNameCreate,
            ImpalaSqlParser.RULE_databaseNameCreate,
            ImpalaSqlParser.RULE_columnNamePathCreate,
            ImpalaSqlParser.RULE_tableNamePath,
            ImpalaSqlParser.RULE_functionNamePath,
            ImpalaSqlParser.RULE_viewNamePath,
            ImpalaSqlParser.RULE_databaseNamePath,
            ImpalaSqlParser.RULE_columnNamePath,
        ]);
    }
    createLexerFromCharStream(charStreams) {
        return new ImpalaSqlLexer(charStreams);
    }
    createParserFromTokenStream(tokenStream) {
        return new ImpalaSqlParser(tokenStream);
    }
    get splitListener() {
        return new ImpalaSqlSplitListener();
    }
    createErrorListener(_errorListener) {
        const parserContext = this;
        return new ImpalaErrorListener(_errorListener, parserContext, this.preferredRules);
    }
    createEntityCollector(input, allTokens, caretTokenIndex) {
        return new ImpalaEntityCollector(input, allTokens, caretTokenIndex);
    }
    processCandidates(candidates, allTokens, caretTokenIndex, tokenIndexOffset) {
        const originalSyntaxSuggestions = [];
        const keywords = [];
        for (let candidate of candidates.rules) {
            const [ruleType, candidateRule] = candidate;
            const startTokenIndex = candidateRule.startTokenIndex + tokenIndexOffset;
            const tokenRanges = allTokens.slice(startTokenIndex, caretTokenIndex + tokenIndexOffset + 1);
            let syntaxContextType = void 0;
            switch (ruleType) {
                case ImpalaSqlParser.RULE_functionNameCreate: {
                    syntaxContextType = EntityContextType.FUNCTION_CREATE;
                    break;
                }
                case ImpalaSqlParser.RULE_tableNameCreate: {
                    syntaxContextType = EntityContextType.TABLE_CREATE;
                    break;
                }
                case ImpalaSqlParser.RULE_databaseNameCreate: {
                    syntaxContextType = EntityContextType.DATABASE_CREATE;
                    break;
                }
                case ImpalaSqlParser.RULE_viewNameCreate: {
                    syntaxContextType = EntityContextType.VIEW_CREATE;
                    break;
                }
                case ImpalaSqlParser.RULE_columnNamePathCreate: {
                    syntaxContextType = EntityContextType.COLUMN_CREATE;
                    break;
                }
                case ImpalaSqlParser.RULE_databaseNamePath: {
                    syntaxContextType = EntityContextType.DATABASE;
                    break;
                }
                case ImpalaSqlParser.RULE_tableNamePath: {
                    syntaxContextType = EntityContextType.TABLE;
                    break;
                }
                case ImpalaSqlParser.RULE_viewNamePath: {
                    syntaxContextType = EntityContextType.VIEW;
                    break;
                }
                case ImpalaSqlParser.RULE_functionNamePath: {
                    syntaxContextType = EntityContextType.FUNCTION;
                    break;
                }
                case ImpalaSqlParser.RULE_columnNamePath: {
                    syntaxContextType = EntityContextType.COLUMN;
                }
                default:
                    break;
            }
            if (syntaxContextType) {
                originalSyntaxSuggestions.push({
                    syntaxContextType,
                    wordRanges: tokenRanges,
                });
            }
        }
        for (let candidate of candidates.tokens) {
            const symbolicName = this._parser.vocabulary.getSymbolicName(candidate[0]);
            const displayName = this._parser.vocabulary.getDisplayName(candidate[0]);
            if (displayName && symbolicName && symbolicName.startsWith('KW_')) {
                const keyword = displayName.startsWith("'") && displayName.endsWith("'")
                    ? displayName.slice(1, -1)
                    : displayName;
                keywords.push(keyword);
            }
        }
        return {
            syntax: originalSyntaxSuggestions,
            keywords,
        };
    }
}