109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
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#include "sqlhelper.h"
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#include <stdio.h>
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#include <string>
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namespace hsql {
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void printExpression(Expr* expr, uint num_indent);
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void printOperatorExpression(Expr* expr, uint num_indent);
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const char* indent(uint num_indent) { return std::string(num_indent, '\t').c_str(); }
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void inprint(int64_t val, uint num_indent) { printf("%s%ld \n", indent(num_indent), val); }
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void inprint(float val, uint num_indent) { printf("%s%f\n", indent(num_indent), val); }
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void inprint(const char* val, uint num_indent) { printf("%s%s\n", indent(num_indent), val); }
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void inprint(const char* val, const char* val2, uint num_indent) { printf("%s%s->%s\n", indent(num_indent), val, val2); }
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void inprintC(char val, uint num_indent) { printf("%s%c\n", indent(num_indent), val); }
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void inprintU(uint64_t val, uint num_indent) { printf("%s%lu\n", indent(num_indent), val); }
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void printTableRefInfo(TableRef* table, uint num_indent) {
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switch (table->type) {
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case kTableName:
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inprint(table->name, num_indent);
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break;
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case kTableSelect:
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printSelectStatementInfo(table->select, num_indent);
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break;
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case kTableJoin:
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inprint("Join Table", num_indent);
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inprint("Left", num_indent+1);
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printTableRefInfo(table->left, num_indent+2);
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inprint("Right", num_indent+1);
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printTableRefInfo(table->right, num_indent+2);
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inprint("Join Condition", num_indent+1);
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printExpression(table->join_condition, num_indent+2);
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break;
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case kTableCrossProduct:
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for (TableRef* tbl : table->list->vector()) printTableRefInfo(tbl, num_indent);
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break;
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}
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if (table->alias != NULL) {
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inprint("Alias", num_indent+1);
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inprint(table->alias, num_indent+2);
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}
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}
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void printOperatorExpression(Expr* expr, uint num_indent) {
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if (expr == NULL) { inprint("null", num_indent); return; }
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switch (expr->op_type) {
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case Expr::SIMPLE_OP: inprintC(expr->op_char, num_indent); break;
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case Expr::AND: inprint("AND", num_indent); break;
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case Expr::OR: inprint("OR", num_indent); break;
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case Expr::NOT: inprint("NOT", num_indent); break;
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default: inprintU(expr->op_type, num_indent); break;
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}
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printExpression(expr->expr, num_indent+1);
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if (expr->expr2 != NULL) printExpression(expr->expr2, num_indent+1);
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}
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void printExpression(Expr* expr, uint num_indent) {
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switch (expr->type) {
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case kExprStar: inprint("*", num_indent); break;
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case kExprColumnRef: inprint(expr->name, num_indent); break;
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case kExprTableColumnRef: inprint(expr->table, expr->name, num_indent); break;
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case kExprLiteralFloat: inprint(expr->fval, num_indent); break;
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case kExprLiteralInt: inprint(expr->ival, num_indent); break;
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case kExprLiteralString: inprint(expr->name, num_indent); break;
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case kExprFunctionRef: /* todo */ break;
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case kExprOperator: printOperatorExpression(expr, num_indent); break;
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default: fprintf(stderr, "Unrecognized expression type %d\n", expr->type); break;
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}
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}
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void printSelectStatementInfo(SelectStatement* stmt, uint num_indent) {
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inprint("SelectStatement", num_indent);
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inprint("Fields:", num_indent+1);
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for (Expr* expr : stmt->select_list->vector()) printExpression(expr, num_indent+2);
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inprint("Sources:", num_indent+1);
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printTableRefInfo(stmt->from_table, num_indent+2);
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if (stmt->where_clause != NULL) {
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inprint("Search Conditions:", num_indent+1);
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printExpression(stmt->where_clause, num_indent+2);
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}
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if (stmt->order != NULL) {
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inprint("OrderBy:", num_indent+1);
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printExpression(stmt->order->expr, num_indent+2);
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if (stmt->order->type == kOrderAsc) inprint("ascending", num_indent+2);
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else inprint("descending", num_indent+2);
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}
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if (stmt->limit != NULL) {
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inprint("Limit:", num_indent+1);
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inprint(stmt->limit->limit, num_indent+2);
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}
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}
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void printImportStatementInfo(ImportStatement* stmt, uint num_indent) {
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inprint("ImportStatment", num_indent);
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inprint(stmt->file_path, num_indent+1);
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inprint(stmt->table_name, num_indent+1);
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}
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} // namespace hsql
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