extended example code

example/example.cpp

@@ -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());
+        printf("Number of statements: %lu\n", result->numStatements());
-        // process the statements...
+
+        for (hsql::SQLStatement* stmt : result->statements) {
+            // process the statements...
+            hsql::printStatementInfo(stmt);
+        }
     } else {
         printf("Invalid SQL!\n");
     }

src/sqlhelper.cpp

@@ -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(); }
+std::string indent(uint num_indent) { return std::string(num_indent, '\t'); }
-void inprint(int64_t val, uint num_indent) { printf("%s%ld  \n", indent(num_indent), val); }
+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), 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), 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), val, val2); }
+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), val); }
+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%lu\n", indent(num_indent), 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

src/sqlhelper.h

@@ -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);