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HyriseSQLParser
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extended example code

This commit is contained in:
Pedro Flemming 2016-01-16 12:36:58 +01:00
parent b2bfe2bb1c
commit f98843a316
3 changed files with 40 additions and 12 deletions
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18
example/example.cpp
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@ -1,7 +1,13 @@
#include <stdlib.h>
#include <string>
// include the sql parser
#include "SQLParser.h"
// contains printing utilities
#include "sqlhelper.h"
int main(int argc, char *argv[]) {
if (argc <= 1) {
fprintf(stderr, "Usage: ./example \"SELECT * FROM test;\"\n");
@ -10,13 +16,17 @@ int main(int argc, char *argv[]) {
std::string query = argv[1];
// parse a given query
hsql::SQLStatementList* stmt_list = hsql::SQLParser::parseSQLString(query);
hsql::SQLStatementList* result = hsql::SQLParser::parseSQLString(query);
// check whether the parsing was successful
if (stmt_list->isValid) {
if (result->isValid) {
printf("Parsed successfully!\n");
printf("Number of statements: %lu\n", stmt_list->numStatements());
// process the statements...
printf("Number of statements: %lu\n", result->numStatements());
for (hsql::SQLStatement* stmt : result->statements) {
// process the statements...
hsql::printStatementInfo(stmt);
}
} else {
printf("Invalid SQL!\n");
}

33
src/sqlhelper.cpp
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@ -7,13 +7,13 @@ namespace hsql {
void printOperatorExpression(Expr* expr, uint num_indent);
const char* indent(uint num_indent) { return std::string(num_indent, '\t').c_str(); }
void inprint(int64_t val, uint num_indent) { printf("%s%ld \n", indent(num_indent), val); }
void inprint(float val, uint num_indent) { printf("%s%f\n", indent(num_indent), val); }
void inprint(const char* val, uint num_indent) { printf("%s%s\n", indent(num_indent), val); }
void inprint(const char* val, const char* val2, uint num_indent) { printf("%s%s->%s\n", indent(num_indent), val, val2); }
void inprintC(char val, uint num_indent) { printf("%s%c\n", indent(num_indent), val); }
void inprintU(uint64_t val, uint num_indent) { printf("%s%lu\n", indent(num_indent), val); }
std::string indent(uint num_indent) { return std::string(num_indent, '\t'); }
void inprint(int64_t val, uint num_indent) { printf("%s%lld \n", indent(num_indent).c_str(), val); }
void inprint(float val, uint num_indent) { printf("%s%f\n", indent(num_indent).c_str(), val); }
void inprint(const char* val, uint num_indent) { printf("%s%s\n", indent(num_indent).c_str(), val); }
void inprint(const char* val, const char* val2, uint num_indent) { printf("%s%s->%s\n", indent(num_indent).c_str(), val, val2); }
void inprintC(char val, uint num_indent) { printf("%s%c\n", indent(num_indent).c_str(), val); }
void inprintU(uint64_t val, uint num_indent) { printf("%s%llu\n", indent(num_indent).c_str(), val); }
void printTableRefInfo(TableRef* table, uint num_indent) {
switch (table->type) {
@ -139,8 +139,25 @@ void printInsertStatementInfo(InsertStatement* stmt, uint num_indent) {
printSelectStatementInfo(stmt->select, num_indent+1);
break;
}
}
void printStatementInfo(SQLStatement* stmt) {
switch (stmt->type()) {
case kStmtSelect:
printSelectStatementInfo((SelectStatement*) stmt, 0);
break;
case kStmtInsert:
printInsertStatementInfo((InsertStatement*) stmt, 0);
break;
case kStmtCreate:
printCreateStatementInfo((CreateStatement*) stmt, 0);
break;
case kStmtImport:
printImportStatementInfo((ImportStatement*) stmt, 0);
break;
default:
break;
}
}
} // namespace hsql

1
src/sqlhelper.h
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@ -7,6 +7,7 @@
namespace hsql {
void printStatementInfo(SQLStatement* stmt);
void printSelectStatementInfo(SelectStatement* stmt, uint num_indent);
void printImportStatementInfo(ImportStatement* stmt, uint num_indent);
void printInsertStatementInfo(InsertStatement* stmt, uint num_indent);